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Multi-Tech Systems MTA128NT User's Manual

1. 0 OM A OO JO 0 P 10 11 12 14 17 18 19 28 79 80 82 83 84 87 Modes of Operation DEFINITION OK CONNECT RING NO CARRIER ERROR CONNECT 1200 NO DIALTONE BUSY CONNECT 300 CONNECT 600 CONNECT 2400 CONNECT 4800 CONNECT 9600 CONNECT 19200 CONNECT 56000 CONNECT 57600 CONNECT 64000 CONNECT 38400 PPPC PROTOCOL HDLC PROTOCOL V 110 PROTOCOL V 120 PROTOCOL X 75 PROTOCOL TA executed the command without error TA established an ISDN connection TA detected a ring caused by incoming call TA did not detect carrier within time allotted by register S7 Error in the AT command TA connected at 1200 bps TA has a poor connection to ISDN network TA detected a busy signal TA connected at 300 bps TA connected at 600 bps TA connected at 2400 bps TA connected at 4800 bps TA connected at 9600 bps TA connected at 19200 bps TA connected at 56000 bps TA connected at 57600 bps TA connected at 64000 bps TA connected at 38400 bps TA using Point to Point protocol TA using raw HDLC mode TA using V 110 rate adaption protocol Note V 110 is supported on some MTA128ST models only TA using V 120 rate adaption protocol TA using X 75 rate adaption protocol CLEAR PROTOCOL TA using CLEAR transparent protocol Using AT Commands to Operate the MTA128ST NT You can configure and operate the MTA128ST NT entirely with AT commands if you like But remember you can issue AT commands only from a terminal or f
2. Online Warranty Registration If you have access to the World Wide Web you can register your Multi Tech product online at http www multitech com register Service U S and Canadian Customers In the event that service is required products may be shipped freight prepaid to our Mounds View Minnesota factory Multi Tech Systems Inc 2205 Woodale Drive Mounds View MN 55112 Attn Repairs Serial A Returned Materials Authorization RMA is not required Return shipping charges surface will be paid by MTS Please include inside the shipping box a description of the problem a return shipping address must have street address not P O Box a telephone number and if the product is out of warranty a check or purchase order for repair charges For out of warranty repair charges go to http Avww multitech com documents warranties Extended two year overnight replacement agreements are available for selected products Please call MTS at 888 288 5470 extension 5308 or visit our web site at http Avww multitech com PROGRAMS orc for details on rates and coverages MTA128ST NT 45 Warranty Service and Technical Support Please direct your questions regarding technical matters product configuration verification that the product is defective etc to our Technical Support department at 800 972 2439 or e mail tsupport multitech com Please direct your questions regarding repair expediting receiving shipping bi
3. It provides the full available bandwidth but no in band monitoring Mode 1 is common to all implementa tions of BONDING Modes 0 2 and 3 are optional BONDING Consortium A group that develops specifications for common control and synchronization for management of high speed data over the public network BONDING Specification 1 0 The Version 1 0 BONDING specification August 1992 defines four modes of inverse multi plexing interoperability It allows devices from various manufactur ers to subdivide a wideband signal into 64 Kbps or 56 Kbps channels and then pass the individual channels over a switched digital network recombining them into a single high speed signal at the receiving device BONDING Specification 1 1 The Version 1 1 BONDING specification September 1993 incorporates changes to the 1 0 specification resulting from interworking tests among various vendors and comments from the TIA standardization process No changes were made to the BONDING algorithm or procedures bps bits per second The unit of speed at which data bits can be transmitted or received Bps differs from baud when more than one bit is represented by a single cycle of the carrier BRI basic rate interface Also called 2B D One of two forms of ISDN service BRI provides two 64 Kbps B channels for video voice or data and one 16 Kbps D channel for control information The total BRI data rate is 192 Kbps with 144 Kbps available to the user Se
4. MTA128ST NT 53 Appendices The requirements for the 5ESS line are shown below B1 Service DMD On demand B2 Service DMD On demand Data Class Line PM Point to MultiPoint Max B Channels 2 Number of CSV Calls 2 CSV Bearer Channels Any Number of CSD Calls 2 Circuit Switched Any Terminal Type Bearer Channels Type A Multipoint lines require the phone company to create a SPID for each phone number on the line With the exception of the ability to spread two calls across two phone numbers multipoint lines offer no special features and may create complications However if you use a multipoint line the parameters are similar to the point to point lines except for the SPIDs The 5ESS switch can provide a variety of supplementary features which the ISDN TA may not support Enabling these features may have undesirable consequences Features to avoid are Packet mode data Multiline Hunt Groups EKTS Electronic Key Telephone Set Shared directory numbers Intercom groups Modem Pools Network resource selector Message waiting Hunting Inter LATA competition Accept special type of number 10b DMS 100 Pvc1 Line Additional Parameters The Northern Telecom DMS 100 telephone switch supports a proprietary ISDN D channel call control protocol called Protocol Version 1 Pvc1 which is based on CCITT recommendations The ISDN TA configured for switch type DMS 100 will work with lines providing this protocol on
5. Please select the settings for the Network Switch Type When your selection is completed please click Next Network Switch Type NET3 AT amp T 5E5 cm mm Select the network switch type you listed in the Before You Start section of this chapter 6 Please select the settings for dynamic bandwidth allocation high and low sampling period and throughput and call bumping ISDN TA Configuration Wizard x Multi lec KO Bandwidth Please select the settings for dynamic bandwidth allocation high and low sampling period and throughtput and call bumping Click Next to continue Dynamic Bandwidth Allocation Scheme 418 e BOD High Threshold Sampling Period 0 255 secs GC BOD Low Threshold Sampling Period 0 255 secs 10 BOD High Throughput Threshold 0 64 kbps a BOD Low Throughput Threshold 0 64 kbps 126 Call Bumping Enabled cme mm Click Next to continue MTA128ST NT 19 Configuration Utilities 7 The TEI Terminal Endpoint Identifier screen is displayed with Please select the settings you would like for Data TEI and Voice TEI ISDN TA Configuration Wizard Multi ec TEI Please select the settings you would like for Data TEI and Voice TEI When you have made your selection please click Next Data TEI Auto TEI DI Voice TEI ce mm The TEI is a unique number assigned to the TA at subscription time The TEI is used by the telephone cent
6. RTS CTS z Synchronous Mode Asynchronous DI el mm Click Next when you are finished MTA128ST NT 23 Configuration Utilities 14 The POTS Port screen is displayed with Please select the settings for the PORTS port ISDN TA Configuration Wizard EN Mag 709 POTS Port Please select the settings for the POTS port When your selections are complete click Next Country Ring Signal HEBAT z Port Ring Frequency 25 Hz Z Pulse Recognition Disabled Dial Tone Use Central Office Dial Tone Dial Tone Suppression Disabled DI Dial Tone Gain fo cme e When your selections are complete click Next 15 The Save Configuration screen is displayed with Please enter the name to store the configuration as in the ini file ISDN TA Configuration Wizard Multi eci Save Configuration Please enter the name to store the configuration as in the ini file Click Next after you have selected a name Store Configuration as lt Back Cancel Help You can enter any name up to 35 characters or less in the Store Configuration as window Click Next after you have selected a name MTA128ST NT 24 Configuration Utilities 16 The Load Configuration screen is displayed with To load the configuration now click Next ISDN TA Configuration Wizard Multi ei Load Configuration To load the configuration now click Next lt Back 17 Your ISDN TA is
7. When you are done click Next IV Auto Answer Data Calls Rings To Answer Data 1 255 fi Online Inactivity Timer 0 255 min fo Dialing Method Enbloc D Te ey Call Control Setup allows you to set up your terminal adapter and customize how it dials and answers You can configure persistent DTR dialing calling line identification auto answer data calls and number of rings You can also set the online inactivity timer as well as the dialing method Click Next when you are done MTA128ST NT 21 Configuration Utilities 10 The Data Protocol Setup screen is displayed with Please select the setting you desire for the Data Protocol ISDN TA Configuration Wizard Multi ei Data Protocol Setup Please select the setting you desire for Data Protocol Click Next after your selection is made Data Protocol IV Auto protocol detection el Heo If you would like the TA to detect the data protocol of an incoming data call and automatically change the TA s protocol to match the incoming call click auto protocol detection check box Click Next to continue 11 The Stored Numbers screen is displayed with Please enter the numbers you would like to store Multi lec Lei Stored Numbers Please enter the numbers you would like to store Click Next when you are done Note Stored phone number 0 is used with persistent DTR dialing Ko loo Im Ia In rn L Ito Imo ka
8. and 7 data bits space parity 1 or 2 stop bits 7S1 or 7S2 The TA assumes 8 data bits no parity 1 stop bit 8N1 and this setting covers 7S1 7S2 8N1 and 8N2 However if for some reason the assumption of 8N1 causes a problem then there is a workaround The addition of the S3 command and use of SBn P3 n P4 n and P6 n will help work around this limitation See the description for the Sn command MTA128ST NT 34 Troubleshooting SITUATION 4 The autobauding code does not report the number of stop bits This may become a problem if the terminal is expecting a certain number of stop bits The addition of the S3 command and use of SBn P3 n P4 n and P6 n will help work around this limitation See the description for the Sn command Debugging Logging Troubleshooting Commands The AT commands in this section can be used in attempting to troubleshoot or debug a current problem Some commands may be enhanced or limited by the debugging logging troubleshooting S registers For complete descriptions of the commands and S registers see the additional documents on this CD Debugging Logging Troubleshooting Command Summary AT Command Function gt Dn Embedded Protocol Analyzer EPA FSn Reset TA Ln Fatal Error Information gt LOG Display Logging Buffer Contents gt Sn Logging Variables gt TIME Display Current Timestamp Wi Various State Information Debugging Logging Troubleshooting S Registers The S registers in this
9. include R S T and U reference points RFC Request for Comments Name for the IETF document that provides internet standards RJ 11 An industry standard interface used for connecting a telephone to a modular wall outlet comes in 4 and 6 wire packages RJ 45 An 8 wire modular connector for voice and data circuits RPOA recognized private operating agency A corporation private or government controlled that provides telecommunications services RPOAs such as AT amp T participate as non voting members in the ITU T RS 232 An EIA TIA standard for a serial interface between computers and peripheral devices modem mouse etc It uses a 25 pin DB 25 or a 9 pin DB 9 connector The RS 232 standard defines the purposes electrical characteristics and timing of the signals for each of the 25 lines Similar to the ITU T V 24 standard S S reference point Provides the connection between NT2 equip ment and the TA or TE 1 Can provide both primary and basic rate MTA128ST NT Glossary services Also called the S interface Contrast R reference point SAP service access point A point at which the services of an OSI layer are made available to the next higher layer See also SAPI SAPI service access point identifier A logical point at which data link layer services are provided by a data link layer entity to a layer 3 entity See also SAP serial port The connector on a PC used to attach serial devices thos
10. port etc switched 56 A circuit switched full duplex digital synchronous data transmission service that lets you dial a number and transmit 63 data to it at 56 Kbps It is a relatively low cost service widely used in North America for telecommuting videoconferencing and high speed data transfers Many phone companies are phasing out switched 56 in favor of ISDN service switched line In communications a physical channel established by dynamically connecting one or more discreet segments This connection lasts for the duration of the call after which each segment may be used as part of a different channel Contrast with leased line switched network A network in which a temporary connection is established from one point via one or more segments synchronous transmission The transmission of data which involves sending a group of characters in a packet This is a com mon method of transmission between computers on a network or between modems One or more synchronous characters are transmit ted to confirm clocking before each packet of data is transmitted Compare to Asynchronous Transmission T T Provides the connection between the NT1 and NT2 Can be internal to or external from the PABX Provides the connection between the NT1 equipment and the TA or TE 1 Can provide both Primary Rate and Basic Rate services TA See terminal adapter TCP IP Transmission Control Protocol Internet Protocol A multi layer set
11. spoken over each 64 Kbps channel between two ISDN devices The devices on both ends of the ISDN link must use identical protocols AT command Z V 110 Protocol some models only Used to connect slower pre ISDN communications devices to high speed ISDN lines It handles rates up to only 38400 bps and is used mostly in Europe The devices on both ends of the link must be set to identical rates MTA128ST NT 14 Configuration Utilities V 120 Protocol Similar to V 110 protocol but provides rates up to 64000 bps on each B channel X 75 Protocol Packet switched network protocol for international use Layer 2 portion of this protocol is used commonly as a rate adaption protocol MLPPP Protocol MLPPP Multi Link PPP protocol provides rates up to 64 Kbps per channel This protocol uses both B channels at once providing an aggregate data transmission speed of 128 Kbps Dialing Numbers The MTA128ST NT can dial telephone number n where ncan be up to 20 characters AT command Dn n phone number Stored Numbers The MTA128ST NT can store as many as ten phone numbers up to 20 characters each AT command amp Z Dialing Stored Numbers The MTA128ST NT can dial a number previously stored in directory number n with the amp Zn x command AT command e g DS3 COM Port Settings COM port settings control how your TA communicates with your computer through the RS232 V 24 serial Baud Rate or Bit Rate Select the initi
12. E 50 Using ISDN Ordering Codes lIOCS TEE 50 Ordering ISDN Without IOCS ceeecece cece eeetne reece teeters enc ee eee ee eet ee eens ened eae eden een aee ee daee een aeeeeaee se SEENA EEEE nE 52 Appendix C FCC and Canadian Regulation ccccsseccceesceeeseeeeeesneeenseneeesneeeeeeeaaesenseeeaeaaaeeesesaessaseeeeesseaaeeeeeeesseseneaes 56 RE 56 Canadian Limitations NOUCE sicits seezeececensevect gege deed geed ogee aandaa Sai A EENE aSpa atta Saa de EE 57 Appendix D Configuration Method 22 220 cc cccccececccasscecessnccseteccesennestcasneseceatecsesnecesssaccecenacedseacuccenstnaesceneecesstecdessenesezes 58 Firmware based Configuration Utility cccccceecseeeeeeeeeeeeceee eee ee ee eeceeeeteaaeeeceaaeeecaaeeeceaaeeesaaeseccaeesseaeeeseeaeeesseeeesenaeeeseaas 58 Configuration via AT Commands EE 58 EI Ee E 59 Introduction and Description Chapter 1 Introduction and Description Welcome to the world of ISDN communications You have acquired one of the finest ISDN terminal adapters TAs available today model MTA128ST NT from Multi Tech Systems The MTA128ST is a desktop TA with an S T interface port to connect it to the ISDN network and an analog port to connect it to a telephone modem or fax machine The MTA128NT is a desktop TA with a U interface to connect it to the ISDN network and an analog port to connect it to a telephone modem or fax machine The TAs ship with a software configuration utility for Windows 9
13. However if you set the receiving terminal adapter s serial baud rate nearly equal to or greater than the serial baud rate of the sending terminal adapter then the packet size can be greater than 1024 and Zmodem transfers the data without bad packet errors The MTA128ST NT won t accept V 120 calls from a 3Com Impact IQ terminal adapter The Impact IQ displays a connected status but the MTA128ST NT does not The MTA128ST NT is looking fora SABME command from the Impact IQ to finish establishing the V 120 connection However the Impact IQ won t send a SABME until it has data to send Have the Impact IQ send a character by pressing any key such as the space bar on the terminal attached to the Impact IQ The MTA128ST NT responds with a CONNECT message and displays the key you pressed e g a space MTA128ST NT receives garbage characters when connected to a 3Com Impact IQ terminal adapter Most likely the Impact IQ has compression turned on The compression used by the Impact IQ is incompatible with the compression used by the MTA128ST NT Disconnect the data connection and give the Impact IQ the command AT CO and then establish the data connection again The garbage characters should disappear MTA128ST NT 39 Troubleshooting The MTA128ST NT receives garbage characters after receiving several good characters when connected to a 3Com Sonix adapter Most likely the Sonix has compression turned on The compression used by the Sonix is i
14. Ilo cect mm You can store up to ten phone numbers with up to 25 characters per number Stored number zero is used if Persistent DTR Dialing is enabled in Call Control Setup screen MTA128ST NT 22 Configuration Utilities 12 The Port Control Setup 1 screen is displayed with Please select the settings you would like for the DTR detect time DCD drop time DTR DSR CTS and DCD signals ISDN TA Configuration Wizard EN Multi ec Port Control Setup Please select the settings you would like for the DTA detect time DCD drop time DTR DSA CTS and DCD signals After your selections are made click Next DIR Detect Time 0 255 P DCD Drop Time 0 255 DTR Signal Noma x DSR Signal AlwaysOn CTS Signal Always On DI BCD Signal Normal DI Feste Click Next when you have finished entering your settings 13 The Port Control Setup II screen is displayed with Please select the settings you would like for the Default Parity Default Bit Rate number of Data Bits number of Stop Bits Flow Control and synchronous mode ISDN TA Configuration Wizard Multi ei Port Control Setup II Please select the settings you would like for Default Parity Default Bit Rate number of Data Bits number of Stop Bits Flow Control and the synchronous mode Please click Next when you are done Default Parity None DI Data Bits E D Default Bit Rate 115200 DI Stop Bits ji DI Flow Control
15. Using ISDN Ordering Codes IOCs An organization called ISDN Solutions Group made up of ISDN service providers and equipment vendors was formed to simplify the often complex task of ordering an ISDN line This method supported by most but not all service providers uses ISDN ordering codes to define the ISDN line configuration Your ISDN TA has been tested to operate with the following ordering codes B1 Capability C Capability R 12 J2 J3 Capability S and M5 as described in the following sections B1 previously Generic Data B This ISDN line ordering code supports e 1B Service e Data only on 1 B channel and e One directory number Capability C previously Generic Data C This ISDN line ordering code supports e 1B Service e Alternate voice and data on one B channel and e One directory number Capability R previously Generic Data I This ISDN ordering code supports e 2B Service e Data only on each B channel and e Two directory numbers Applications for Capability R include e 115 2K or 128K bps data only no voice capability and e Generic 115 2K 128K bps data transfer applications including remote access and LAN WAN connectivity and telecommuting MTA128ST NT 50 Appendices D previously Generic Data I 1DN This ISDN ordering code supports e 2B Service e Data only on each B channel and e One directory number I2 is not available on the Northern Telecom switch Two directory numbers are requir
16. X have Internet connection capabilities built in If you don t use the Internet connection abilities provided by the Mac OS then you will need to create your own initialization string to suit your needs Generally these initialization strings can be based on the Factory Profile command amp Fn to set up the desired protocol MTA128ST NT 40 PPP MLPPP Chapter 6 Point to Point Communications PPP MLPPP Bonding Using the amp and Characters You can use the amp and characters to bond two channels together when performing channel bonding available only with the MLPPP protocol When you use the amp or characters with the MLPPP protocol the TA regards the number following that character as a second phone number When used with MLPPP the TA first dials the number given before the amp or character After establishing the LCP Link Control Protocol and authenticating if requested the TA dials the second number the number after the amp or character This is an alternative method to set up a MultiLink PPP call as opposed to using the amp J7 command which dials the given number twice rather than dialing two different numbers Example ATD5551000 amp 5553000 dials 5551000 first sets up the LCP and authenticates and then dials 5553000 and sets up the LCP and authenticates on the second B channel thus setting up an MLPPP call Note Using these characters with any protocol other than the PPP MLPPP
17. ___ National ISDN 1 Pvc2 ____ Siemens EWSD with National ISDN 1 4 Request that the ISDN line you are ordering allocates one dynamic TEI Terminal Endpoint Identifier per phone number 5 Order specific services for your particular ISDN Switch ba AT amp T 5ESS request a line with Feature Value B1 Service DMD On Demand B2 Service DMD only if 2B D ordered Data Line Class PM Point to MultiPoint Maximum B Channels 2 if 2B D or 1 if 1B D Circuit Switched Voice CSV Bearer Channels Any CSV Calls 1 recommended for test purposes Number of Circuit Switched Data CSD Bearer Channels Any Number of CSD Calls 2 if 2B D ordered or 1 if 1B D ordered Terminal Type Type A MTA128ST NT 52 Appendices Turn these features OFF Packet Mode Data MultiLine Hunt Multiple Call Appearances EKTS Electronic Key Telephone Sets Shared Directory Numbers Accept Special Type of Number Intercom Groups Modem Pools Network Resource Selector Message Waiting Hunting InterLATA Competition 5b Northern Telecom DMS 100 request a point to multipoint line with Line Type Basic Rate Functional Electronic Key Telephone Sets EKTS No Call Appearance Handling CACH No Non Initializing Terminal No Circuit Switched Service SS Packet Switched Service TEI Dynamic Bearer Service Circuit Switched Voice and Data Permitted on Any B Channel Packet Mode Data not permitted 6 Select a long distan
18. all ten telephone numbers stored in memory type ATL lt cr gt Answering a Call You can answer incoming calls to the MTA128ST NT either manually or automatically When the TA detects an incoming call it turns on the RI signal on the V 24 interface and sends a RING result code to the computer or terminal after each ring If autoanswer is enabled the TA automatically answers the call You can manually answer the call with the A command Both methods are described below Answering Manually If your communication program is in terminal mode when the RING result code appears on your monitor you can manually answer the call by typing ATA lt cr gt Answering Automatically To cause the MTA128ST NT to automatically answer a call 1 Enable autoanswer by setting register S0 to the ring on which you want the TA to answer e g in terminal mode type S0 4 to make the TA answer on the fourth ring You also can use either of the configuration utilities to the turn on autoanswer and set the number of rings 2 Make sure that the TA is offline The TA answers the call after the number of rings specified by S0 To disable autoanswer use a configuration utility or the command S0 0 Note If the user wants to accept calls while DTR is low the TA must be configured to ignore DTR To do this enter AT amp DO lt cr gt With this configuration the TA can accept calls while DTR is low If this configuration setting is not made the TA rejects incoming
19. any character code firmware Software that is stored in read only memory ROM Unlike random access memory RAM ROM can retain its content without electrical power Some ROM known as EEPROM can be reprogrammed electrically while it is in a device foreground The application program currently running on and in control of the PC screen and keyboard The area of the screen that occupies the active window Compare with background frequency A characteristic of an electrical or electronic signal which describes the periodic recurrence of cycles Frequency is inversely proportional to the wavelength or pulse width of the signal e g long wavelength signals have low frequencies and short wavelength signals yield high frequencies H handshaking A process that two modems go through at the time of call setup to establish synchronization over the data communica tions link It is a synchronization and negotiation process accom plished by the exchange of predefined mutually recognized control codes HDLC High Level Data Link Control An ISO standard bit oriented data communications protocol that provides nearly error free data transfers hexadecimal A base 16 numbering system in which one character represents a four bit binary value Hexadecimal notation uses the numbers 0 9 and the letters A F usually suffixed by an A e g 4CF h IDN Integrated Digital Network The culmination of transmission and switching functions
20. connection on bearer channel 1 zl Bearer Channel 2 When lit indicates active data or voice connection on bearer channel 2 Ga Terminal Ready Lights to indicate that the computer is communicating with the MTA128ST NT so the MTA128ST NT can answer an incoming call D Off Hook Lights when analog equipment on AUX port is active or off hook 128 Kbps Lights to indicate that the B channels have been multiplexed into a single 128 Kbps communications link Data Protocol Lights in combination with P2 and 128 LEDs to indicate which data protocol V 110 V 120 X 75 PPP MLPPP is in use as shown in the table below Data Protocol Lights in combination with P1 and 128 LEDs to indicate which data protocol V 110 V 120 X 75 PPP MLPPP is in use as shown in the table below MTA128ST NT 8 MTA128ST NT Data Protocol V 110 V 120 X 75 1 channel PPP 1 channel MLPPP 2 channels OFF OON 128 LED PiLED P2LED O 0 O OO CO OO CO Introduction and Description Introduction and Description Technical Specifications Trade Name Model Number Network Interface IWay Hopper MTA128ST International MTA128NT ST Four wire S T interface NT 2 wire U interface Switch Compatibility EurolSDN ETSI DSS1 NET3 VN4 INS64 U S NI 1 AT amp T 5ESS DMS 100 both models support all of the switch protocols B Channel ProtocolsV 110 some models only V 120 X 75 PPP ML PPP CLEAR Vo
21. contain a LLC low layer compatibility element When these switches receive an LLC in the SETUP they immediately reject the call and a NO CARRIER message displays Disable LLC for V 120 calls by issuing the command AT DO 0 To enable LLC again for V 120 calls issue the command AT DO 1 the default setting Making a V 110 call caller gets a NO CARRIER message after dialing the number Some switches don t support extended BC bearer capability information in the ISDN SETUP message such as the one normally sent by V 110 data protocol When these switches receive a BC with extended capability information in the SETUP they immediately reject the call and a NO CARRIER message displays Disable sending extended BC information for V 110 calls by issuing the command AT D1 0 To enable sending extended BC information for V 110 calls issue the command AT D1 1 the default setting Note V 110 is supported on some MTA128ST models only When using X 75 data protocol to transfer data via the Zmodem the Zmodem displays Intermittent bad packet errors and data throughput drops This occurs in cases when the X 75 packet size is greater than 1024 bytes and the terminal adapter sending the file has a fast serial baud rate e g 115200 bps and the terminal adapter receiving the file has a slow serial baud rate e g 19200 bps To reduce or possibly eliminate this reduce the X 75 packet size S53 to a value less than or equal to 102 bytes e g ATS53 512
22. in permanent memory and are not user configurable as such MTA128ST amp FO Profile O Modem like operation default amp F1 Profile 1 V 110 async operation amp F2 Profile 2 V 120 async operation amp F3 Profile 3 X 75 async operation amp F4 Profile 4 ML PPP async operation amp F5 Profile 5 SoftBonding Asynchronous Operation amp F6 Profile 6 HDLC Asynchronous Operation amp F7 Profile 7 CLEAR operation MTA128NT SEO Profile O Modem Like Asynchronous Operation amp F1 Profile 1 V 120 Asynchronous Operation amp F2 Profile 2 X 75 Asynchronous Operation amp F3 Profile 3 PPP Asynchronous Operation amp F4 Profile 4 SoftBonding Asynchronous Operation amp F5 Profile5 HDLC Asynchronous Operation amp F6 Profile 6 CLEAR Asynchronous Operation Quick Setup Example The following procedure assumes that you want to load modify and store Quick Setup Factory Profile 2 as your default configuration 1 Select the profile closest to the requirements of your application in this case Quick Setup Factory Profile 2 2 In terminal mode type AT amp F2 and press ENTER Quick Setup Profile 2 loads into the MTA128ST NT s active memory 3 Enter any additional AT commands that you need to customize the selected profile to your application see Chapter 4 AT Commands S Registers and Result Codes 4 Type AT amp W0 and press ENTER to save your customized port configuration 5 Your customized profile now
23. loads automatically whenever the MTA128ST NT is turned on or reset MTA128ST NT 48 Appendices Appendix B Ordering Your ISDN Line There are two ways to specify your ISDN line configuration to your service provider One is by using ISDN ordering codes in which the user the Local Exchange Carrier LEC or Internet Service Provider ISP are using common nomenclature to describe elements of service The other way of ordering service is to use a building block approach where the naming conventions are non standardized and the user and provider must establish a set of provisioning options Loop Qualification The first step in ordering provisioning an ISDN BRI line is to contact your LEC and verify ISDN BRI loop availability in your location There is a distance limitation of approximately 2 miles 1800Kf from the BRI loop Each request for BRI is handled on a case by case basis Once qualified the LEC requires information on the type of equipment and protocol used Most ISDN BRI is configured as voice and data due to the fact that the LEC network is primarily analog and ISDN digital technology converts the digital signal into analog transports it over their analog lines and then re converts it into digital data at the other end As a general procedure when ordering an ISDN BRI 2B D line 1 Plan ahead the BRI line order may take four weeks or more to get provisioned 2 Contact your LEC representative early in
24. of protocols developed by the US Department of Defense to link dissimilar computers across dissimilar and unreliable LANs TEI terminal endpoint identifier A unique number that is as signed to an ISDN terminal adapter at subscription time The TEI is used by the central office to identify the various TAs connected to the ISDN network The TEI number can be fixed in the range Of 0 63 or dynamic automatically assigned at the CO each time the TA is connected to the ISDN interface and powered up TE1 Terminal Equipment Type 1 A terminal device with a standard ISDN interface an ISDN compatible terminal TE2 Terminal Equipment Type 2 A terminal device with a non ISDN interface such as RS232 RS449 V 35 or X 21 Can be a telephone data terminal or voice data worrkstation etc telecommunication service A function such as bearer service and teleservice offered by an RPOA to its customer in order to satisfy a specific telecommunications requirement See also ISDN RPOA and bearer service telematics User oriented ISDN information transfer services e g teletex videotex facsimile Teleservices A telecommunications service that provides the complete capability for communication between subscribers accord ing to protocols agreed to by RPOAs A set of ISDN features using communications links including E Mail and fax services Teletext A telecommunications service that provides a one way information retrieval servic
25. order codes SOC are shown An FCC compliant telephone cord and modular plug is provided with this equipment This equipment is designed to be connected to the telephone network or premises wiring using a compatible modular jack which is Part 68 compliant See installation instructions for details 3 The ringer equivalence number REN is used to determine the quantity of devices which may be connected to the telephone line Excessive REN s on the telephone line may result in the devices not ringing in response to an incoming call In most but not all areas the sum of the REN s should not exceed five 5 0 To be certain of the number of devices that may be connected to the line as determined by the total REN s contact the telephone company to determine the maximum REN for the calling area 4 If this equipment causes harm to the telephone network the telephone company will notify you in advance that temporary discontinuance of service may be required But if advance notice isn t practical the telephone company will notify the customer as soon as possible Also you will be advised of your right to file a complaint with the FCC if you believe it is necessary 5 The telephone company may make changes in its facilities equipment operations or procedures that could affect the operation of the equipment If this happens the telephone company will provide advance notice in order for you to make necessary modifications in order to main
26. possible characters The extended 8 bit ASCII code defines 255 characters ASI application services interface A software module that creates the interface between a LAN connected PC and the network operat ing system ASIs packetize computer data for transport over the network NASI NCSI MCSI and NETCI are specific examples AT commands A standard set of commands used to control modems Each AT command string begins with the characters AT which get the attention of the modem before the actual command is issued See also command mode background An activity that takes place in the computer while you are running another application In other words the active user interface does not correspond to the background task bandwidth The transmission capacity of a computer channel communications line or bus It is expressed in cycles per second hertz the bandwidth being the difference between the lowest and highest frequencies transmitted The range of usable frequencies that a transmission medium will pass without unacceptable attenuation or distortion Bandwidth is a factor in determining the amount of information and the speed at which a medium can transmit data or other information Bandwidth on Demand Ability to request the amount of data MTA128ST NT Glossary speed you need in any situation Allows you to automatically add and drop b channels according to your preference you pay only for the bandwith you need basic ac
27. to three miles A ACK acknowledgement code A communications code sent from a receiving modem to a transmitting modem to indicate that it is ready to accept data It is also used to acknowledge the error free receipt of transmitted data Contrast with NAK address A numbered location inside a computer The computer uses addresses to access resources such as video cards serial ports memory etc analog signal A waveform that has amplitude frequency and phase which takes on a range of values between its maximum and minimum points analog transmission A type of telecommunications that uses an analog signal as a carrier of voice data video etc An analog signal becomes a carrier when it is modulated by altering its phase ampli tude and or frequency to correspond with the source signal Com pare with digital transmission API application program interface A software module created to allow dissimilar or incompatible applications programs to trans fer information over a communications link APIs may be simple or complex they are commonly required to link computer applications with mainframe programs ASCII American Standard Code for Information Interchange Pronounced ass key A binary code for data that is used in communi cations and in many computers and terminals The code is used to represent numbers letters punctuation and control characters The basic ASCII code is a 7 bit character set which defines 128
28. using digital technology in a circuit switched telecommunications network IEC Inter Exchange Carrier A telephone company that is al lowed to provide long distance telephone service between LATAs but not within any one LATA Also called ZXC IETF Internet Engineering Task Force A self organized group of people who make technical and other contributions to the engineering and evolution of the Internet and its technologies It is the principal body engaged in the development of new Internet standard specifications I mux inverse multiplexer A device that will dial up and com bine several lower speed circuits into a virtual broadband circuit It takes any multiple up to an aggregate bandwidth giving users bandwidth on demand for videoconferencing LAN to LAN connec tions etc In ISDN devices inverse multiplexing is performed by the BONDING protocol in band signaling A technique in which connection control information is sent over the same channel as assigned to the sub scriber for end to end communication Two common examples are DTMF line signaling and MF trunk signaling Internet A computer network consisting of many millions of MTA128ST NT Glossary university government and private users around the world Internet address A unique 32 bit address for a specific TCP IP host on a network Normally printed in dotted decimal format e g 129 128 44 227 T O address A location within the I O address space
29. you want to dial and lt CR gt is the carriage return character that is sent when you press the ENTER key such as ATD7853500 lt cr gt The dial string can contain up to 80 characters To place an ML PPP call use an ampersand character amp to join two telephone numbers such as ATD7853500 amp 7853502 lt cr gt The telephone numbers can be the same or different Using this method two B channels are activated to transmit data at an aggregate speed of 128 Kbps To make it easier to read the dial string you can use hyphens spaces or parentheses These characters are ignored by the MTA128ST NT For example the MTA128ST NT would read the following dial strings the same way ATD17637853500 lt cr gt ATD 1 763 785 3500 lt cr gt ATD 1 763 785 3500 lt cr gt Channel Bundling Flag Dialing The command AT amp Jn is used to indicate whether outgoing calls should be made on two B channels by default The command AT amp J1 amp W0O lt cr gt configures the TA to place a call dialing on two B channels by default If no second number is given in the dial string that single number is dialed twice This compensates for the interworking issues with Windows Dial Up Networking On the other hand if the user explicitly indicates two numbers in the dial string then two numbers are dialed e g ATD7853500 amp 785 3502 lt cr gt The command AT amp JO0 amp WO lt cr gt disables automatic call bundling Note other valid characters joining two telepho
30. 13 with ConfigMenu 13 with ISDN TA Configuration utility 13 Configuration Profiles 48 configuration profiles 48 configuration utilities Windows 95 11 connecting the modem 11 connections computer 48 Connectors ISDN 38 connectors 10 D data bits 15 data mode 32 data protocol MLPPP 15 V 120 14 X 75 15 data rates 10 data terminal ready DTR 14 Dial Up Networking 13 Dialing a Stored Telephone Number 32 dimensions 10 directory number DN 14 Displaying a stored number 33 DN directory number 14 DTR Data Terminal Ready 14 Dynamic Bandwidth Allocation 41 E EMC Safety and Terminal Directive Complianace environmental conditions 10 escape sequences 32 F factory profiles 48 FCC Canadian Regulation 56 features 4 flow control 39 front panel 36 initialization strings 37 installation and setup 11 IRQ conflicts 37 ISDN BRI Line 5 Index 57 65 ISDN line 37 ISDN ordering 49 ISDN Solutions Group 50 ISDN TA Configuration utility 13 L LED Indicators Link Status 8 LED indicators 10 36 128 Kbps 8 Bearer Channel 1 8 Bearer Channel2 8 Data Protocol 8 Link Status 8 OffHook 8 Receive Data 8 Terminal Ready 8 Transmit Data 8 Loop Qualification 49 M manual organization 9 messages response 31 ML PPP protocol 15 48 dialing 32 MLPPP connections 41 MSD EXE 37 MSN multiple subscriber number 14 MultiExpress terminal 36 multiple subscriber number MSN 14 N network c
31. 8 NT ME and ConfigMenu a built in configuration utility for Windows and non Windows operating systems In addition the MTA128ST NT accepts AT commands that enable it to use the same communications software as an analog modem The MTA128ST is compatible with the popular EurolSDN switch protocol it communicates using ISDN BRI 2B D service which provides up to 128 Kbps data and voice communications and it automatically detects whether an incoming call is voice or data and handles it appropriately The MTA128ST NT provides dial up asynchronous communication capability with other personal computers terminals on line computer services or other computer systems Connection to your computer terminal device is made via the RS232 connector ISDN Connection to analog devices is accomplished with an RJ11 connector and one RJ45 connector is used for your ISDN connection This User Guide will help you install configure and operate your MTA128ST NT Product Description There are two ISDN interface options S T and U If you purchased the S T interface adapter MTA128ST you need an ISDN NT1 device connection to the ISDN switch If you purchased the U interface adapter MTA128NT it can directly connect to the ISDN switch figure 1 1 ISDN T interface ISDN U interface customer site SS h ISDN U interface ISDN central office MTA128NT customer site Figure 1 1 S T and U Interface Options Your ISDN
32. 8ST NT is able to accept calls while DTR is low If this configuration setting is not made the TA rejects incoming calls until DTR is high while the calls comes in MTA128ST NT 38 Troubleshooting File transfer appears slower than it should be e Ifyou have a Universal Asynchronous Receiver Transmitter UART that is compromising data throughputs we recommend replacing it with a special I O card e Ifyou are running under Windows 3 1 and have a 16550AFN UART replace the Windows serial driver COMM DRY to take full advantage of the UART s speed e Check the serial port baud rate in your communications software and make sure it is set as high as your UART allows Data is being lost e Your UART may not be reliable at serial port speeds over 9600 bps or 19 200 bps Reset your serial port speed to a lower rate or replace your serial port with a faster one e Check the serial port baud rate in your communications software and make sure it is set as high as your UART allows e Make sure the flow control method you selected in software matches the method selected in the MTA128ST NT Garbage characters appear on the monitor Your computer and the remote computer may be set to different parities Check with the remote system and set your communications software to use the same parity as the remote system Making a V 120 call caller gets a NO CARRIER message after dialing the number Some switches don t support ISDN SETUP messages that
33. DMS 100 switches with software version BCS 32 or later The ISDN TA supports the following configurations on DMS 100 Custom lines e Multipoint with one phone number for 1B D service e Multipoint with two phone numbers for 2B D service The requirements for the DMS 100 multipoint line are defined in Local Interface Requirements Local Service Requirements and below Fax this information to your local phone company The line should have two service profiles with the parameters below to support BONDING and the POTS port if installed MTA128ST NT 54 Appendices Line Type Basic rate functional EKTS No CACH No Initializing terminal Yes Bearer services Circuit switched voice amp data permitted Packet mode data not permitted Circuit switched service Yes Packet switched service No Protocol version Functional Pvc1 TEI Dynamic MTA128ST NT 55 Appendices Appendix C FCC and Canadian Regulation FCC This equipment complies with Part 68 of the Federal Communications Commission FCC rules On the outside surface of this equipment is a label that contains among other information the FCC registration number and ringer equivalence number REN If requested this information must be provided to the telephone company 2 As indicated below the suitable jack Universal Service Order Code connecting arrangement for this equipment is shown If applicable the facility interface codes FIC and service
34. Escape Character Ee Carriage Return Character S4 Line Feed Character S5 Backspace Character S7 Wait for Connection Abort Timer S8 Pause Time for Comma S10 DCD Drop Time S25 DTR Drop Time S26 Delay DTR Monitoring After Connect S27 RS 232 CLEAR Synchronization Sequence S29 On line Inactivity Timer Period S30 On line Inactivity Timer 31 Maximum Re dial Timeout Value 32 Escape Sequence Timeout 34 Maximum Escape Sequence Length S44 POTS Port Ring Frequency S45 Use Dial Tone From Central Office S46 Pulse Dial Recognition S49 POTS Port Dial Tone Gain S50 Caller Line ID CLI 51 POTS Port Dial Tone Suppression 52 Auto Protocol Detection 53 Maximum X 75 Buffer Size 54 Force 56Kbps B Channel Data Rate S55 Information Transfer Capability for POTS Port Calls S56 Calling Party Number Information Element Settings S57 Called Party Number Information Element Settings S58 Client side PPP ML PPP Authentication Protocol Negotiation S59 Dynamic Bandwidth Allocation DBA Scheme S60 Bandwidth On Demand BOD High Threshold Sampling Period S61 Bandwidth On Demand BOD High Throughput Threshold S62 Bandwidth On Demand BOD Low Threshold Sampling Period MTA128ST NT 29 MTA128ST NT 63 S64 S65 S66 S67 S68 S69 70 71 73 74 75 S76 S77 S80 S81 S82 S84 S85 S86 S87 S154 AT Commands S Registers and Result Codes Bandwidth On Demand BOD Low Throughput Threshold Call Bumping CB POTS Call Bump Forwarding Delay Country Se
35. List Active Profile Information Display Network Configuration Management Information Block MIB Information Network Configuration Commands kk S A97 N gt A0 n IC0 n IC6 n IC6 n DO n D1 n ID3 n ID3 n IDNn IDNn ENn IENn gt MULT N INn s INn s User User Information Element String Dialing Method Type of Coding Network Switch Type Data SPID Voice SPID V 120 LLC Information Element V 110 BC Information Element some models only SAPI 0O Data TEI SAPI O Voice TEI Disable Data DN MSN n Disable Voice DN MSN n Enable Data DN MSN n Enable Voice DN MSN n Multi point setting Data DN MSN n Voice DN MSN n Serial Port Configuration Commands amp Cn amp Dn Dn amp En amp Mn MBn P3 n P4 n P6 n amp Rn amp RFn amp Sn SBn Sn Xn DCD Data Carrier Detect Control DTR Data Terminal Ready Control Persistent DTR Dialing Flow Control Asynchronous Mode V 110 Network Rate some models only Parity Data Bits Stop Bits CTS Clear To Send Control CTS RTS Interaction Control DSR Data Set Ready Control Serial Port Speed Serial Port Mode Send Multiple Xoff Characters General Configuration Commands CONFIG Configuration Menu MTA128ST NT 27 En En amp Fn Mn Qn Sr n Sr Vn amp Wn Xn Z amp Zn IZ n Command Mode Echo Escape Sequence Options Load Factory Profile Management Mode Quiet Mode Set S register Read S register Verbose Result Cod
36. MTA128ST NT by typing them in the terminal window of a data communications program such as HyperTerminal You can also send some AT commands indirectly by configuring your data communications program To enter AT commands use the following format AT lt command string gt lt cr gt The characters AT cause the MTA128ST NT to interpret the following string as a command The command string consists of one or more commands The carriage return character lt cr gt sends the command string to the MTA128ST NT If you are entering a command string in your communication program s terminal window insert the carriage return character by pressing the ENTER key on your keyboard If configuring a communications program you typically must insert the carriage return character by adding M to the end of the command string The MTA128ST NT has three modes of operation offline command mode the default state online command mode and data mode The MTA128ST NT responds to AT commands only when it is in one of the command modes After the MTA128ST NT establishes a connection and goes online in data mode it interprets any further characters you enter as data rather than as commands and transmits them to the remote device When the MTA128ST is in data mode you can switch it to online command mode by sending it an escape sequence The MTA128ST NT responds to two types of escape sequences e In band where the escape sequence is part of the data stream The
37. Netscape Communications Corp DMS 100 is a trademark of Northern Telecom All other trademarks are owned by their respective companies Multi Tech Systems Inc 2205 Woodale Drive Mounds View MN 55112 U S A Telephone 763 785 3500 or 800 328 9717 Fax 763 785 9874 Technical Support 800 972 2439 Internet http www multitech com Contents Chapter 1 Introduction and Description ccccesenceeeeceeeeeeeeeeeneeeeeeeeseeeeee eee naeeeeeaae se eeeeeedneeeeeeeaaeseneeeeseaneeeeenseaeseeee 4 Welcome to the world of ISDN COMMUNICATIONS cee ccccccccecceecceceeeeeceeeeseeeeseeeeceeaaeeeeeeeeeeeeeeeeeeeeceseeesseseeeseeeeeeesaaaaaaees 4 Product DOSCrIPtlOM 2 eet dgdeegesgr kd Aig een fa pwede EE EAEE TE gege AEE deed ege EES 4 Feeturesg E E vase cccvevea ia beceeeeves Vase ceedeves E i sbiceveeves yaaa ccetees E cede bbneeveevea yaaa 5 Ree E Eelere Eeer EE 10 Chapter 2 Hardware Installation cccesscceseeeeeeeeeeeeeenaeeeseeeeeaneeeeeeesaesenseeesessaeeeseeaeseasaneeesseaneesseaaeseaseeasegaeeeeesseaeeeneaes 11 Safety E Lulu EE 11 Connecting YOUR TA seess d e det E dee Eeer 11 Chapter 3 Configuration Utilities SeeERREEEEEREEEEEEERREEEERREEEEEREEEEEEERREEEERKEEEEEREEEEEEERREEEERREEEERREEEEEERREEEERREEEEEREEEEEEERREEEER KEEN 13 lite e e EE 13 Before YOU Start EE 13 Contigurinig your EEN 17 Chapter 4 AT Commands S Registers and Result Codes csseccssseeeeeseeeeeeeeeeesseaeeeeesaeseeseeeeesn
38. SDN TA Configuration Wizard Multi lec KO Searching for TA Devices have been identified Please select a device to configure ISDNTA s MTA128ST Click Next to continue lt Back Cancel Help Click Next to continue 4 The Configuration screen is displayed with Select the type of setup custom building a new configuration custom with an existing configuration or express with an existing configuration ISDN TA Configuration Wizard EN Multi me Configuration Select the type of setup custom building a new configuration custom with an existing configuration or express with a existing configuration Click Next to continue Setup Express Existing x Delete Configuration Configuration USA DMS100 E Fees From the Setup pull down window you can choose Express Existing Custom Existing or Custom New The Express Existing opens an existing configuration allowing you to modify some elements of the configuration Custom Existing opens an existing configuration allowing you to modify all elements of the configuration Custom New allows you to customize a new configuration I have chosen Custom New for this example MTA128ST NT 18 Configuration Utilities 5 The Network Switch Type screen is displayed with Please select the settings for the Network Switch Type ISDN TA Configuration Wizard EN Multi ec Network Switch Type
39. TA is compatible with prevalent ISDN switch protocols It communicates using ISDN BRI 2B D service which provides up to 128K bps data communications MTA128ST NT 4 Introduction and Description This manual documents the following models e MTA128ST for S T interface with one POTS port e MTA128NT for U interface with one POTS port Some analog devices including telephone set answering machine and modem can be connected to the POTS port via an RJ 11 jack This User Guide will help you install configure and operate your terminal adapter Features The MTA128ST NT communicates over public ISDN telephone lines Features include e Compatibility with EurolSDN ETSI DSS1 NET3 French VN4 and Japanese INS64 switch protocols e Compatibility with U S NI 1 AT amp T 5ESS and DMS 100 switch protocols e Compatibility with V 110 some models only V 120 ML PPP and X 75 protocols e Transparent synchronous communication capability CLEAR e ISDN BRI 2B D and analog ports e RS232E serial port e Serial port speeds to 460 8 Kbps e Support of PPP Point to Point Protocol for high speed ISDN connections e Tone detection to allow use of a standard telephone for ISDN line access an ISDN telephone is not required e Automatic detection of incoming calls as voice or data e Windows 98 NT ME software utility and a firmware utility for easy ISDN line configuration e AT commands S registers and result codes e Ability to use the same com
40. TA is online CTS still provides flow control Select Momentary Drop to cause CTS to drop momentarily when the link is lost then to go high again AT command amp R DSR Control A high DSR Data Set Ready signal on the RS232 serial port indicates your TA is ready to communicate with your computer or terminal Normally it follows the state of the DTR signal Select Normal to make DSR act normally Select Always On to cause the TA to ignore the state of the DTR signal Select Momentary Drop to cause DSR to drop momentarily when the link is lost then to go high again AT command SS DCD Control Normally the DCD Data Carrier Detect signal on the RS232 serial port goes high when the TA receives a connect message from a remote TA and drops when the link is lost Select Always On to satisfy a requirement by some software packages for this state to be present constantly Select Normal for normal operation Select Momentary Drop to cause DCD to drop momentarily when the link is lost then to go high again The length of the drop is governed by register S10 AT command amp C Asynchronous Synchronous Mode Normally the MTA128ST NT communicates in asynchronous mode If you need transparent synchronous communication change this register setting AT command amp M MTA128ST NT 16 Configuration Utilities Configuring your TA If you use Windows 98 Me NT perform the following procedure using the Configuration Utility provid
41. Tey ISDN Terminal Adapter Models MTA128ST and MTA128NT External ISDN Terminal Adapter User Guide Multi lech Systems User Guide Model MTA128ST NT S 000305B Rev B This publication may not be reproduced in whole or in part without prior written permission from Multi Tech Sys tems Inc All rights reserved Copyright 2004 by Multi Tech Systems Inc Multi Tech Systems Inc makes no representations or warranties with respect to the contents hereof and specifi cally disclaims any implied warranties of merchantability or fitness for any particular purpose Furthermore Multi Tech Systems Inc reserves the right to revise this publication and to make changes from time to time in the content hereof without obligation of Multi Tech Systems Inc to notify any person or organization of such revi sions or changes Revision Date Description A 7 25 03 The manual replaces 82052305 Rev G Manual updated with NT info AT commands and S registers moved into additional documentation on CD B 11 05 04 Changed temperature from 50 to 40 C Trademarks IWay IWay Hopper Multi Tech and the Multi Tech logo are trademarks of Multi Tech Systems Inc AT amp T and 5ESS are registered trademarks of American Telephone and Telegraph Microsoft Windows and Windows 95 are registered trademarks of Microsoft Corporation NETCOM is a registered trademark of NETCOM On Line Communication Services Inc Netscape and Navigator are trademarks of
42. The Hn and Hn commands can be very useful for certain RAS environments that require at least 1 second to initialize a port after a call has disconnected such as Citrix and Novell For example when a call disconnects Citrix and Novell will begin initializing the port that just disconnected However it typically takes more than 1 second and during that time a call may be received by the digital or analog port When this happens Citrix and Novell do not answer the call nor do they finish the initialization process To prevent this problem setting JH5 and or H5 will set the TA to hold of digital and or analog calls for 5 seconds after the respective port s disconnect s This should give enough time for the digital and or analog port to be initialized by Citrix or Novell and enter the waiting for a call state SITUATION 2 The autobauding code cannot differentiate between 7 data bits no parity 1 or 2 stop bits 7N1 or 7N2 and 7 data bits mark parity 1 or 2 stop bits 7M1 or 7M2 The TA assumes 7 data bits mark parity 1 stop bit 7M1 and this case covers 7N1 7N2 7M1 and 7M2 However if for some reason the assumption of 7M1 causes a problem then there is a workaround The addition of the S3 command and use of SBn P3 n P4 n and P6 n will help work around this limitation See the description for the Sn command SITUATION 3 The autobauding code cannot differentiate between 8 data bits no parity 1 or 2 stop bits 8N1 or 8N2
43. al speed at which your TA communicates with your computer For V 110 data protocol the rates must be identical on the local and remote TAs and may not exceed 38400 bps For all other data protocols V 120 MLPPP X 75 etc the default initial baud rate is 115200 bps Typically in command mode the MTA128ST NT selects a serial port speed of 300 1200 2400 4800 9600 19200 38400 57600 115200 or 230400 bps depending on how fast the AT commands are coming from the computer or terminal The SBn command sets the default serial soeed used when the TA first powers up Using the S command you can disable automatic speed selection and lock the serial port speed to 460800 bps See Serial Port Configuration Commands in Chapter 4 for more information AT commands SB or S Note Your computer must have a high speed serial port with a 16550AFN UART or equivalent to utilize ISDN s high speeds Flow Control Select the method by which your TA and computer control the flow of data between them Unless you know your computer has special requirements select the default RTS CTS method The other choice is XON XOFF AT command amp E Data Bits Parity and Stop Bits These settings further control initial communications between the TA and computer Unless you know your computer has special requirements use the default settings of 8 data bits no parity checking and 1 stop bit 8 N 1 The TA sets these parameters automatically the first time it
44. also the PPP Multilink Protocol or MP is an Internet standards track protocol for a methyod of splittingm recombining and sequencing datagrams across multiple logical data links giving you additional bandwith on demand Originally MLPPP was used to combine two ISDN BRI channels into a single high speed data path but now is also used anywhere multiple PPP links connect two systems including async links This is done with new PPP options and protocols Also knows as MPPP and PPP Multilink MLPPP is an effective means of bonding channels for providing bandwith on demand modem A communications device that enables a computer to transmit information over a telephone line It converts the computer s digital signals into analog signals to send over a tele phone line and converts them back to digital signals at the receiving end Modems can be internal and fit into an expansion slot or external and connect to a serial port MP MultiLink Protocol Plus An extension to the PPP Multilink Protocol MP convered in IETF RFC 1717 MP is a new control protocol for managing multiple data links that are bundled by MP Also called the Multichannel Protocol Plus or MPP MS CHAP Microsoft version of CHAP multilink In point to point protocol literally many links A procedure used to route data packets over many links for increased bandwidth e g two B channels on a single BRI for 128 Kbps mux multiplexer A device that merges several si
45. ameters They are assigned by the ISDN service provider in the form of a string of up to 20 characters at subscription time The SPID actually points to a specific location in central office memory where the relevant informartion is stored SS7 Signaling System 7 An ITU T and ANSI standard for digital out of band signalling between central offices that provides much of the network switching intelligence to support many ISDN functions stop bit One of the variables used for timing in asynchronous data transmission Depending on the devices each character may be trailed by 1 1 5 or 2 stop bits subscriber loop tThe pair of wires that connect the end user to the telephone network These wires provide ISDN service but also require an NT1 at the enduser location as well as the LT at the network end See also local loop supplementary services SS ISDN functions beyond the basic requirements includes videoconferencing fast dialing call waiting call forwarding calling line ID SVC switched virtual circuit A type of data transmission where the connection is maintained only until the call is cleared SVD simultaneous voice and data A technology for letting a user send data via a modem and use a handset to talk to another user at the same time over the same connection The alternative making a second call can be expensive or even impossible The uses for SVD are telecommuting videoconferencing distant learning tech sup
46. ases may be 6 or 8 wires The name of the S T bus comes from the letters used in the ISDN specifications to refer to two reference points Sand T Point T refers to the connection between the NT1 device and customer supplied equipment Terminals can connect directly to NT1 at point 7 or there may be a PBX private branch exchange i e a customer owned telephone exchange When a PBX is present point S refers to the connection between the PBX and the terminal Note that in ISDN terminology terminal can mean any sort of end user ISDN devices such as data terminals telephones FAX machines etc The diagram which follows reflects interface points in a typical ISDN network MTA128ST NT 5 Introduction and Description If your ISDN product operates with a S T outlet interface you need an NT1 device to connect to the ISDN switch MTA128ST adapters need an NT1 device to connect to the ISDN switch but the MTA128NT adapter does not require NT1 device In the UK and in many European countries NT1 device is supplied by your telephone company Point S Point T Terminal NT2 4 Wires PBX ae Point U feschen 2 Wires Point S Point S Terminal Terminal Figure 2 1 ISDN Interface Points S T Interface The S T interface uses an 8 conductor modular cable terminated with an 8 pin RJ 45 plug An 8 pin RJ 45 jack located on the terminal is used to connect the terminal to the DSL Digital Subs
47. ation of devices subject only to the requirement that the sum of the ringer equivalence numbers of all the devices does not exceed 5 Notice The Industry Canada label identifies certificated equipment This certification means that the equipment meets certain telecommunications network protective operational and safety requirements The Industry Canada does not guarantee the equipment will operate to the user s satisfaction Before installing this equipment users should ensure that it is permissible to be connected to the facilities of the local telecommunications company The equipment must also be installed using an acceptable method of connection The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment Users should ensure for their own protection that the electrical ground connections of the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution may be particularly important in rural areas Caution Users should not attempt to make such connections themselves but should contact the appropriate electric inspe
48. bumped removed to allow analog POTS port use Bandwidth on Demand BOD checks the data throughput to determine whether a channel should be added or removed Call Bumping CB determines whether a channel needs to be added again analog call disconnected or removed incoming or outgoing analog call desired due to activity on the analog POTS port To activate Bandwidth on Demand or Call Bumping enable Dynamic Bandwidth Allocation in S register S59 The 128 LED flashes if DBA is active and only one data channel is connected The 128 LED stops flashing and remains on after the second B channel is successfully added If the second channel is disconnected due to low throughput or a call bump the 128 LED flashes again to indicate that DBA is still active If the TA attempts to add a B channel but the host is busy or not answering the TA starts a timer time is set in S register S31 However if the analog device goes off hook or an analog call is received the timer is stopped and reset After the analog call finishes the TA again attempts to add the B channel Taking the analog device off hook and placing it on hook again interrupts the timer thus allowing control over the amount of time it takes before attempting to add the second channel rather than waiting for timeout values specified by 31 DBA Data Protocols MLPPP is the only data protocol that currently supports DBA To start DBA set amp J1 or give two numbers to be dialed Other
49. by telephone companies that provides functions and features comparable to those of a PBX for large business users See also PBX exchange channel A data communications path between two computer devices It can refer to a physical medium e g UTP or coax or to a specific carrier frequency In ISDN two types of channels are specified transparent user can define the service and nontransparent service is assigned protocols for specific network functions ISDN channel names are designated by a single letter from A through M sometimes combined with a number see B channel and D channel CHAP Challenge Handshake Authentication Protocol Security method used to verify the identity of a person or process CHAP MD5 Chap with MDS digital signature algorithm imple mented circuit switched network A technology used by the PSTN that allocates a pair of conductors for the exclusive use of one communi cation path Circuit switching allows multiple conversations on one talk path only if end users multiplex signals prior to transmission circuit switching The temporary connection of two or more communications channels using a fixed non shareable path through the network Users have full use of the circuit until the connection is terminated CO central office The lowest most basic level of switching in the PSTN public switched telephone network A business PABX or any residential telephone connects to the PSTN at a central off
50. cable into the PHONE Jack RJ11 on the TA Note The PHONE jack and the IDSN jack on the TA are not interchangeable MTA128ST NT 12 Configuration Utilities Chapter 3 Configuration Utilities Introduction You can configure the MTA128ST NT to match your ISDN service and the remote terminal adapter TA with any of four methods listed below e ISDN TA Configuration Utility This configuration utility is recommended for computers running Windows 98 NT ME operating systems Because it is a software based utility you can use it to create and store as many configurations as you want e ConfigMenu This firmware based configuration utility is recommended for computers running other OS with terminal capabilities To run it you must have a VT100 ANSI compatible terminal or a data communication program that includes VT100 ANSI terminal emulation e Windows Dial Up Networking With Dial Up Networking you can gain access to shared information on another computer even if your computer is not on a network The computer you are dialing in to must be set up as a network server for you to use its shared resources Windows includes a remote node client called Dial Up Networking DUN The MTA128ST NT can be configured to communicate using this utility e AT Commands If you prefer using AT commands or want to fine tune the operation of your TA configure your TA by using AT commands and S registers much as you would configure an analog modem You must
51. calls until DTR is high while calls comes in Hanging Up To hang up a call escape to online command mode AT lt cr gt then enter the H command ATH lt cr gt The escape sequence and hang up command can be combined into one command string ATH lt cr gt MTA128ST NT 33 Troubleshooting Chapter 5 Troubleshooting Troubleshooting the TA Introduction This chapter describes basic problems you may run into with your MTA128ST NT and how to solve them Your MTA128ST NT was thoroughly tested at the factory before it was shipped If you are unable to make a successful connection or if you experience data loss during your connection it is possible that the MTA128ST NT is defective However it is more likely that the source of your problem lies elsewhere Problems you may encounter include the following None of the LEDs light when the MTA128ST NT is on The MTA128ST NT does not respond to commands The MTA128ST NT dials but cannot make a connection You can place data calls but not voice calls or vice versa You cannot place two simultaneous data calls The MTA128ST NT disconnects while online The MTA128ST NT cannot connect when answering File transfer appears slower than it should be Data is being lost There are garbage characters on the monitor If you experience problems please check the following possibilities before calling Tech Support see Chapter 7 Specific Troubleshooting Situations SITUATION 1
52. ce carrier note here 7 Contact the selected long distance carrier and request Circuit Switched 64K bps Clear Channel Access if available 8 Request that the telephone company provide ISDN TA configuring information record here e ISDN Switch Type e ISDN Switch Protocol Version e ISDN Phone Number 1 ISDN Phone Number 2 if 2B D ordered e ISDN Line Type point to point or multipoint e If MultiPoint SPID Number 1 with prefix and suffix e If MultiPoint SPID Number 2 with prefix and suffix 9 If you will be using standard 5ESS or DMS 100 your protocol selection is complete Fax the information in steps 1 8 to your phone company If you will be using 5ESS Custom or DMS 100 Pvc1 protocol support continue with step 10a 5ESS Custom or step 10b DMS 100 Pvc1 10a 5ESS Custom Line Additional Parameters The AT amp T 5ESS central office telephone switch supports a proprietary ISDN D channel call control protocol called Custom which is based on CCITT recommendations The ISDN TA configured for switch type AT amp T 5ESS will work with lines providing this protocol on 5ESS switches with software version 5E6 or later The ISDN TA supports the following configurations on 5ESS Custom lines e Point to Point with one phone number recommended configuration with no POTS interface e Multipoint with one phone number e Multipoint with two phone numbers recommended configuration with POTS interface
53. cess A term that describes a simple standardized combina tion of access channels that constitute the access arrangements for most ISDN users B channel bearer channel A 64 Kbps ISDN channel used for digital high speed data or voice transmission Simultaneous voice and data transmission requires subscription to two B channels A voice call can be placed or received while a data call is in process or vice versa however two simultaneous voice or two simulta neous data calls are not supported bearer capability BC The level of functionality provided by the ISDN B channel e g data 3 1 KHz audio etc bearer services A set of ISDN functions provided by the B channel such as digital telephony toll free inbound outbound calls 64 Kbps circuit switched data X 25 packet switched data and frame relay data bit A bit binary digit is a basic unit of information used in computing and other digital electronics It can take a value of either 1 or 0 represented in a computer by a high or low electrical charge BONDING Bandwidth on Demand Interoperability Group An inverse multiplexing method that combines multiple ISDN channels into a single channel for enhanced throughput Trademark of the BONDING Consortium BONDING mode 1 An industry standard ISDN B channel aggre gation protocol that was developed by the Bandwidth On Demand Interoperability Group This mode supports user data rates that are multiples of the bearer rate
54. channels by default You may be using the wrong bundling dial modifier e g ATD7853500 amp 7853502 lt cr gt The ampersand in this command string is correct Other valid characters joining two telephone numbers include a plus sign and an exclamation mark Note In Windows 98 NT ME if the Use Country Code and Area Code box is checked in the Properties window for dial up connection the bundling modifier i e amp or is removed from the dialing string when the user attempts to make a connection The solution is not to check the Use Country Code and Area Code box or to simply add the bundling dial modifier to the phone number at the time of connection The MTA128ST NT disconnects while online Check for loose connections between the MTA128ST NT and the computer the ISDN jack and AC power The problem may have originated at the other end of the line Try again If you were online with a BBS or online service it may have hung up on you because of lack of activity on your part or because you exceeded your time limit for the day Try again The MTA128ST NT cannot connect when answering Autoanswer may be disabled Turn on autoanswer in your data communications program or send the command ATS0 1 to your MTA128ST NT in terminal mode Note If the user wishes to accept calls while DTR is low the MTA128ST NT must be configured to ignore DTR This is accomplished by entering AT amp DO lt cr gt With this configuration the MTA12
55. criber Loops using this modular cable Table 2 1 shows the Pin Number Terminal Pin Signal Name and SILC Pin Signal name for the S T interface 12345678 Soss MTA128ST NT 6 U Interface Introduction and Description The U interface uses a 2 conductor twisted pair cable terminated with an RJ 45 jack An RJ 45 jack located on the terminal is used to connect the terminal to the Digital Subscriber Loops using this twisted pair cable In Table 2 2 the Pin Number Terminal Pin Signal Name and UILC Pin Signal Names for the U interface are listed MTA128ST NT Positive Input ooo Da Negative Input Introduction and Description LED Indicators The ten LED indicators on the front panel see figure below of the MTA128ST NT report status and line activity E mm e We Multi eo HOPPER f 128K bps 2B D ISDN Modem Systems Transmit Data Flashes when data is being transmitted on for a space off for a mark Ga Receive Data Flashes when data is being received on for a space off for a mark Link Status For EurolSDN NETS INS64 and VN4 switch protocols lights when the TA is turned on For US NI 1 DMS 100 and AT amp T 5ESS switch protocols On Steady Link with central office is established requires correct configuration of SPIDs Flashing Physical layer is down or one or both SPIDs have not been verified with central office Bearer Channel 1 When lit indicates active data or voice
56. ction authority or electrician as appropriate LE The CE mark is affixed to this product to confirm compliance with the following European Community Directives Council Directive 89 336 EEC of 3 May 1989 on the approximation of the laws of Member States relating to electromagnetic compatibility and Council Directive 73 23 EEC of 19 February 1973 on the harmonization of the laws of Member States relating to electrical equipment designed for use within certain voltage limits and Council Directive 98 13 EC of 12 March 1998 on the approximation of the laws of the Member States concerning telecommunications terminal and satellite earth station equipment MTA128ST NT 57 Appendices Appendix D Configuration Methods Firmware based Configuration Utility 1 If you are using another operating system turn on your computer and start your data communications program 2 The TR Terminal Ready LED lights to indicate that your computer is ready to communicate with the TA Type AT in the communications program s terminal window and press ENTER The TA should respond with OK If it doesn t go to Chapter 5 for troubleshooting help 3 To view your current configuration type AT L in the terminal window Switch Type and Data Protocol information appear The fields for SPIDs Service Provider Identification and for Voice and Data Directory Numbers will be empty Your TA ships with Auto TEI terminal endpoint identifier as its defau
57. currently being configured ISDN TA Configuration Wizard Multi ei Configuring Your ISDN TA is currently being configured To stop the configuration click Cancel Help When the Finish button becomes active click Finish 18 The Configured screen is displayed Click Finish to exit the Configuration Utility MTA128ST NT 25 AT Commands S Registers and Result Codes Chapter 4 AT Commands 5 Kegisters and Result Codes MTA128ST NT Commands and S Registers All references to TA in this chapter refer to the MTA128ST NT This chapter also assumes knowledge of issuing AT commands lt CR gt refers to the carriage return character typically generated by pressing the ENTER or RETURN key on the keyboard For command execution details see the additional documents on this CD AT Commands The TA s command buffer can store 80 characters including spaces and other characters used in telephone numbers If you mistype a command string you can edit it by using the backspace or the delete key but only before you press lt CR gt As you type a command string it appears on your monitor screen letting you verify your input as you type it The table below lists the AT commands recognized by the TA If your MTA128ST NT is connected to a computer terminal you can send AT commands to the MTA128ST NT by entering them on the keyboard If your MTA128ST NT is connected to a computer you can send AT commands to the
58. d to a network terminator bus AT command D3 Voice TEI Voice TEI is the TEI assigned to the voice channel Choices are Auto TEI a fixed TEI number or Disable AT command D3 Data MSN MTA128ST NT 13 Configuration Utilities The Data MSN multiple subscriber number allows a caller to specify an individual TA when more than one TA is connected to you network terminator If you don t assign a value to the MSN the TA accepts all incoming calls If you only assign a base address to the MSN the TA accepts any incoming call with the same base address regardless of whether a subaddress is included If you assign a base address anda subaddress to the MSN the TA only accepts calls that match both the base address and the subaddress The following examples show the syntax for setting the MSN with and without a subaddress AT command N1 MSN with subaddress 5551000 001 base address is 5551000 subaddress is 001 MSN without subaddress base address is 5551000 Voice MSN Selects calls on the voice channel in the same way the Data MSN selects calls on the data channel AT commana N1 SPIDs and DNs The TA must be configured with the Service Profile Identifier SPID The SPID is assigned by the local phone company and is for the specific BRI line where the TA is attached The SPID field is empty prior to configuration AT commands AT C6 and AT C6 Directory Number DN is the phone number another user calls t
59. digital signals See also exchange digital signal A discrete or discontinuous signal e g a sequence of voltage pulses Digital devices such as as a series of electrical pulses that have discrete jumps rather than gradual changes digital transmission A method of electronic information transmis sion common among computers and other digital devices Because a digital signal may be only high or low at any given time noise and distortion can easily be removed from digital transmissions digitize To convert an analog signal to a digital signal DIP switch Pronounced dip switch A set of tiny toggle switches built into a DIP dual in line package used for setting configurable parameters on a printed circuit board DN directory number The phone number assigned to an ISDN TA at subscription time It is a string of up to 24 characters consist ing of the valid dialing characters 0 9 and driver A software module that interfaces between the operating system and a specific hardware device e g color monitors printers hard disks etc Also known as a device driver DTE data terminating equipment A term used to include any device in a network which generates stores or displays user infor mation DTE is a telecommunications term that usually refers to PCs terminals printers etc DTMF dual tone multifrequency A generic push button concept made popular by AT amp T TouchTone DTMF detection A capability i
60. e TA to the AC Power Outlet Plug the DC power transformer into an AC power outlet or power strip Plug the DC power transformer into the POWER jack on the TA Note Use only the DC power transformer supplied with the TA Use of any other transformer voids the warranty and can damage the TA Turn on the TA by sliding the power switch to ON and verify operation by observing the LEDs on the front panel The LEDs first flash in a self test pattern Then the LS LED remains on If the TA does not appear to be working Refer to Chapter 5 for troubleshooting help Connect the TA to Your PC RS 232 Connection Plug one end of the RS 232 serial cable into the RS 232 connector on the modem and plug the other end into a serial port connector on your computer such as COM1 or COM2 You supply the RS 232 cable Connecting to your ISDN Network Terminator If you need a longer cable than the one provided with your TA select a cable that is wired straight through pin 1 to pin 1 pin 2 to pin 2 etc with at least the middle four pins connected pins 3 4 5 and 6 Plug one end of the cable into the ISDN jack on the TA and the other end into the jack on your network terminator MTA128ST or U interface MTA128NT Note The PHONE jack and ISDN jack are not interchangeable Optional Connecting to Analog Equipment You can connect an analog device such as an analog telephone modem or fax machine to the TA Simply put the device s module telephone
61. e also JSDN and PRI buffer A temporary storage register or random access memory RAM used in all aspects of data communications that prevents data from being lost due to differences in transmission speed Keyboards serial ports muxes and printers are a few examples of devices that contain buffers 59 bus A common channel between hardware devices either inter nally between components in a computer or externally between stations in a communications network byte A unit of information consisting of eight binary digits bits A byte holds the equivalent of a single or character such as the letter A Cc Call Bumping TA feature that reallocates the second B channel to an analog port when both B channels are in use If you are perform ing a data transfer using both channels and need to make a phone call one channel is dropped to handle the call and then is reestab lished after it is completed With call bumping you don t miss any calls call setup time tThe time to establish a circuit switched call between two points Includes dialing wait time and central office long distance service movement time carrier signal An analog signal with known frequency amplitude and phase characteristics used as a transport facility for useful information By knowing the original characteristics a receiver can interpret any changes as modulations and thereby recover the information Centrex A multi line service offered
62. e that need to receive data one bit after another such as a mouse a printer or a modem This consists of a 9 or 25 pin connec tor that sends data in sequence bit by bit Serial ports are referred to as COMx ports where x is 1 to 4 e g COM through COMA4 A serial port contains a conversion chip called a UART that translates between internal parallel and external serial formats service The requirements offered by an RPOA to its customers to satisfy specific telecommunications needs signaling The process of establishing maintaining accounting for and terminating a connection between two endpoints e g the user premises and the telco CO Central office signals to the user pre mises can include ringing dial tone speech signals etc Signals from the user s telephone can include off hook dialing speech to far end party and on hook signals In band signaling techniques include pulse and tone dialing With common channel signaling information is carried out of band In ISDN signaling includes the call establishment call progress monitoring call termination and enhanced telephone features provided typically by the D Channel See also SS7 out of band signaling and in band signaling SPID service profile identifier In North America the ISDN network parameter for logical terminal identification and tracking provided by the ISDN provider The voice SPID and data SPID identify a particular set of service or feature par
63. e that uses unused portions of a TV channel bandwidth A fixed number of text pages are repetitively broadcast for decoding by a decoder at the TV set that can select and display pages See also ISDN terminal The screen and keyboard device used in a mainframe environment for interactive data entry Terminals have no box which is to say they have no file storage or processing capabilities terminal adapter TA An ISDN DTE device for connecting a non ISDN terminal device to the ISDN network Similar to a protocol converter or an interface converter a TA connects a non ISDN device between the R and S interfaces tone dialing One of two methods of dialing a telephone usually MTA128ST NT Glossary associated with Touch Tone push button phones Compare with pulse dialing TSR terminate and stay resident A software program that re mains active and in memory after its user interface is closed Similar to a daemon in UNIX environments twisted pair wiring A type of cabling with one or more pairs of insulated wires wrapped around each other An inexpensive wiring method used for LAN and telephone applications also called UTP wiring U U reference point A twisted pair subscriber loop that connects the LT to the NT1 Normally a 2 wire BRI or PRI line is used but a 4 wire BRI can also be used In the US the U Reference Point marks the separation point between CPE and the network UART universal asynchronous receiver
64. eaeeeeeseseeseeeeeenenaeeees 26 MTA128ST NT Commands and S Registers cccccceceeeeeeeeeeeeeeeeeeeeeeeeeaeeeeeaaeeeeeeaeeeceeaeeeseeaeeeseaeeessaeeesesaeeeseeaeeesseaeeeeeaas 26 Ee 29 Chapter 5 Troubleshooting 2 cccecceseeeeeeseeeeeensaeeenseneeesneeeeeeeaeseesseeeeasaaeesensaeseaseeesessaaeeseesaeseesaeeseaseneesesaeseeaseesessenaeeees 34 Troubleshooting the TA WEE 34 Chapter 6 Point to Point Communications PPP MLPPP sseeccsssseeeeeseeeeeseeeeesneneeeeesaeseeeeeeeesaeneeeeesaeseaseeeeeanenaeenes 41 Chapter 7 Warranty Service and Tech Support ccceeeeeeeeceeeeeeeeeeeeneeeeeeaaeeeneeeeesnaeeeeeeaaeseneneeeeaneeeeeeesaeseeeseeeeeseneeeees 44 Multi Tech Systems Inc Warranty amp Repairs Policies A 44 Online Warranty Registration 0 cccccceeeeeeeeeeneeeeeeneeeeeene eect aeeeeeeee ee eeae een aee ee eaeeeegaeeeenaeeeeeaeeeeseaeeeescaeesecaeeeeseeeeeseaeeees 45 DOPVICE EE 45 Replacement Parts keen 46 E laien 47 Appendix A Configuration Profiles cccscecsseeeeeeeseeeeseeeeeesnneeeeneaeseeseeeeegsaneeseneessasaeeaesseaaeseaseaeseesseeeesseaaeeeeseeeeeseeeaes 48 Quick Setup Factory Profiles cc cece ce eee eee eene eee ece terete een e ee eee eee eee eae eae eae eee eae eee eras enaeeeeneaeeeenaaee ee 48 Quick Setup GET 48 Appendix B Ordering Your ISDN Lime eesEeEERRRREEEERREEERREEEEEEERREEERREEEEEREEEEEEEREEEEREEEEEEERNEEEREEEEERREEEEEEERNEEEERREEEE REENEN 49 Loop QuallifiCatiOn EE 49 SE e
65. ective Call Tech Support for assistance see Chapter 7 The MTA128ST NT dials but cannot make a connection There can be several reasons the MTA128ST NT fails to make a connection Possibilities include e Lack of a proper physical connection to the communication line e A busy signal e Awrong number e No terminal adapter at the other end e A faulty communications device computer or software at the other end e Incompatibility between communications devices e Animproperly configured MTA128ST NT Narrow the list of possibilities by using extended result codes To enable them enter ATV1X2 and press ENTER while in terminal mode or include V1X2 in the MTA128ST NT s initialization string V1X2 is enabled by default When you dial again the MTA128ST NT reports the call s progress MTA128ST NT 37 Troubleshooting If the MTA128ST NT reports NO DIALTONE check that the ISDN S T cable is securely connected to both the TA s ISDN jack not the PHONE jack and the ISDN network terminator or wall jack If the cable looks secure try replacing it If that doesn t work the problem may be in your building s telephone installation Make sure ISDN cables on all devices are wired straight through pin 1 to pin 1 pin 2 to pin 2 etc and do not have reversed pairs The cable must have at least the middle four pins pins 3 4 5 and 6 connected A reversed pair on the U phone company side is not important but a reversed pair on the S T you
66. ed for 2B operation in this case use J2 J2 previously Generic Data J This ISDN ordering code supports e 2B Service e alternate voice and data on one B channel data only on other B channel and e Two directory numbers J3 previously Generic Data J 1DN This ISDN ordering code supports e 2B Service e alternate voice and data on one B data only on other B channel and e One directory number J3 is not available on the Northern Telecom switch Since two directory numbers are required for 2B operation use J2 Capability S previously Generic Data M This ISDN ordering code is the recommended IOC since it supports the most features for voice and data applications However ISDN tariffs in some areas may warrant ordering codes with fewer features e g where there is an additional monthly charge for having voice service on both B channels If yours is a data only application you may find Capability R more cost effective Capability S supports e 2B Service e alternating voice data on each B channel and e Two directory numbers Applications for Capability S include e 115 2K or 128K bps data e 56K 64K bps data with voice or modem support and e Generic 115 2K 128K bps data transfer applications including remote access and LAN WAN connectivity and telecommuting M5 previously Generic Data M 1DN This ISDN ordering code supports e 2B Service e alternate voice data on each B channel and e One di
67. ed in the BRI portion of ISDN to connect four wire S T ISDN devices to the two wire 2BIQ U IDN It provides basic rate access in a 2B D format with two 64 bps channels for voice data and video commu nications It also provides one 16 Kbps channel for packet mode signalling low speed data and telecommunications services at the MTA128ST NT Glossary OSI Layer 1 level Similar in function to a DSU CSU device NT2 Network TerminationType 2 A device at the customer premise user side responsible for the ISDN network connection and for functions such as multiplexing and switching may be an intelligent device NTE network terminating equipment A set of ISDN functions residing at the boundary of the IDN and the subscriber NUI network user identification A unique alphanumeric number provided to dial up users to identify them to packet switched net works world wide The number is used for network access and billing o off hook The condition of a device that has accessed a phone line with or without using the line In modem use this is equivalent to a telephone handset being picked up Dialing and transmission are allowed but incoming calls are not answered on demand dialing A cost saving feature of ISDN that sets up transfers and then closes a call only when the ISDN device detects a data packet addressed to the remote network but will not perform setup transfers of just administrative non user data packet
68. ed on your system CD If you are using another operating system you can configure the TA using the firmware based configuration utility or AT commands Procedures for using the firmware based configuration utility and AT commands are described in Appendix E Before you begin verify your switch type and TEI with your local ISDN provider and have that information readily available 1 When installing from CD insert the MTA128ST NT System CD into your CD ROM drive When the MTA128ST NT Terminal Adapter AutoRun screen is displayed click on the Config Utility icon Follow the on screen directions to load the Configuration Utility onto your pc 2 When the Configuration Utility is loaded onto your pc click Start gt Programs gt ISDNTA Config Utility The Welcome screen is displayed sISDN TA Configuration Wizard x Multi eci Welcome The ISDN TA Configuration Wizard will allow you to configure your terminal adapter quickly and easily Version 1 55 Do you want the wizard to search for your ISDN TA C No Cancel Help Do you want the wizard to search for your ISDN TA with the Yes option enabled Click Nextto continue Rack MTA128ST NT 17 Configuration Utilities 3 Searching for TA screen is displayed with please wait while the configuration utility searches for your ISDN TA s This may take up to 20 seconds Then the Searching for TA screen with Devices have been identified Please select a device to configure I
69. efused A Returned Materials Authorization RMA is required for products shipped from outside the U S A and Canada Please contact us for return authorization and shipping instructions on any International shipments to the U S A Please include inside the shipping box a description of the problem a return shipping address must have street address not P O Box your telephone number and if the product is out of warranty a check drawn on a U S bank or your company s purchase order for repair charges Repaired units shall be shipped freight collect unless other arrangements are made in advance Please direct your questions regarding technical matters product configuration verification that the product is defective etc to our Technical Support department nearest you or email tsupport multitech com When calling the U S please direct your questions regarding repair expediting receiving shipping billing etc to our Repair Accounting department at 763 717 5631 in the U S A or email mtsrepair multitech com Repairs for damages caused by lightning storms water power surges incorrect installation physical abuse or user caused damages are billed on a time plus materials basis Repair Procedures for International Distributors Procedures for International Distributors of Multi Tech products are on the distributor web site http Awww multitech com PARTNERS login Copyright Multi Tech Systems Inc 2001 appr 9 10 01
70. enter these commands in your data communication program s terminal mode For more information see ST and NT AT command documents included on this CD Before You Start Whatever method you use to configure your TA consider your network and call control configuration choices and COM port settings beforehand listed below and record your choices Refer to them during the configuration procedure Before you begin verify your switch type and TEI with your local ISDN provider and have that information readily available Network Configuration Network Switch Type Select the network switch type your ISDN service provider uses at its local central office You can set the MTA128ST NT to NET3 DSS1 VN4 INS64 U S NI 1 AT amp T 5ESS or DMS 100 If you don t know the switch type get the information from your ISDN service provider AT command C0 Data TEI Data TEI is the TEI assigned to the data channel You can select Auto TEI a fixed TEI or Disable A TEI terminal endpoint identifier is a number used by the central office switch to uniquely identify each device connected to the network When it uses dynamic TEI assignments Auto TEI the central office switch assigns a TEI each time the TA connects to the network However the ISDN service provider may assign a fixed TEI at subscription time in which case you must configure the TA with the fixed TEI number You also can disable the channel which may be useful when multiple TAs are attache
71. es Store Active Profile Connect Messages Reset to Stored Profile Store Telephone Number Rate Adaptation Data Protocol Digital Data Call Commands A Dn DSn Hn IHn amp Jn O Answer Digital Call Dial Digital Number Dial Stored Number Hang up Digital Call Digital Call Hold off Time Channel Bundling Return Online Analog POTS Call Commands An Bn Dn Hn IHn IRXGn ITXGn MTA128ST NT Answer Analog Call Send Analog Dial Digit Dial Analog Number Hang up Analog Call Analog Call Hold off Time POTS Port Receive Gain POTS Port Transmit Gain AT Commands S Registers and Result Codes 28 AT Commands S Registers and Result Codes S Registers S registers are sections of memory in which values are stored that affect how the TA operates S registers are so called because each has a name that begins with the character S Use the Sr n command to assign a value to an S register or use the Sr command to read the current value of an S register S registers are stored in non volatile RAM NVRAM by using the amp W0 command ATZ lt CR gt restores S registers to values stored in NVRAM if any were stored using the amp W0O command otherwise they revert to factory default settings in ROM Table 4 2 summarizes the available S registers and their function See the additional documents on this CD for more information on each S register S Register Summary S Register Function SO Rings Until Answer S1 Ring Count S2
72. estab lishes and maintains communications between the DTE and the DCE LAPD Link Access Protocol for the D Channel Based on the ISDN Q 921 specification A full duplex point to point bit synchronous link level protocol for ISDN connec tions different from LAPB in its framing sequence Transmission is in units called frames and a frame may contain one or more X 25 packets link optimization An ISDN feature that permits only user data to open the communications link and keeps administrative packets from opening the link A cost saving feature that ensures that remote connections are not unnecessarily utilized local loop A transmission path typically twisted pair wire be tween an individual subscriber and the nearest public telecommuni cations network switching center Also called the subscriber loop LT loop termination A device similar to an NT1 that terminates the local loop at the carrier s central switching office The LT provides the interface to the ISDN U reference point Contrast ET exchange termination MD5 MD5 Message Digest Algorithm Takes a message if arbitrary length as input and produces it as output as a 128 bit fingerprint or message digest of the input The MD5 algorithm is used for digital signature applications where a large file must be 61 compressed in a secure manner before being encrypted with a private secret key under public key cryptisystem MLPPP Multilink Point to Point Protocol
73. ex A answering a call manually 33 Appendix A Configuration Profiles 48 Appendix C Ordering Your ISDN Line 49 ISDN ordering 49 Appendix D FCC and Canadian Regulation 56 FCC Canadian Regulation 56 Appendix E Configuration Methods Configuration Methods 58 async data format 10 AT commands IC0 13 amp F 48 amp W 48 amp Zn 32 amp Zn 33 AT lt cr gt 32 A 33 D 32 H 33 L 33 lack of response to 36 O 32 V 3l AT commmands using to configure the TA 13 autoanswer 33 38 B channel protocol 10 Bandwidth on Demand 42 baud rate 15 Bearer Service 50 bitrate 15 c cables ISDN 38 serial 36 Call Bumping 43 call control configuration 14 auto answer data calls 14 baud rate 15 bitrate 15 COM port settings 15 CTS control 16 data bits 15 data protocol 14 DCD control 16 DCD drop time 15 dialing method 14 dialing number 15 dialing stored numbers 15 DSR control 16 DTR control 16 DTR detect time 15 flow control 15 parity 15 persistent DTR dialing 14 rings to answer 14 stop bits 15 stored numbers 15 synchronous mode 16 MTA128ST NT canceling a call 32 CE mark 57 COM port 36 settings 15 COMM DRV 39 command mode 31 commands answer 33 Dial 32 hangup 33 List Telephone Numbers 33 Load Profile 48 Store Active Profile 48 switch type 13 communications programs 36 compatibility switch 10 ConfigMenu 13 configuration AT commands 13 Before You Start 13 Dial Up Networking DUN 13 Windows 95
74. gnals into one composite signal for transmission over a single medium or channel A demultiplexer built into most muxes reverses the process at the receiving end N nailed connection A permanent or dedicated circuit of a previ ously switched circuit or circuits nailed up circuit A semi permanent circuit established through a circuit switching facility for point to point connectivity NAK negative acknowledgment A communications code used to indicate that a message was not properly received or that a terminal does not wish to transmit Contrast with ACK network A group of computers connected by cables or other means and using software that enables them to share equipment such as printers and disk drives to exchange information NI 1 National ISDN 1 A physical standard to make all compliant ISDN lines appear the same With ISDN 1 installed additional costs are not incurred when changing from prestandard ISDN to standard ISDN Most RBOCs now are moving to ISDN 1 NI 2 National ISDN 2 A physical standard subsequent to NI1 When tested and deployed NI 2 will provide additional features and enhanced plug and play capabilities node Any point within a network that has been assigned an address NT network termination Devices that form the boundary be tween customer premise equipment and telephone company equip ment Two types of NTs are used NT1 and NT2 NT1 Network TerminationType 1 An interface device us
75. h Systems has an excellent staff of technical support personnel available to help you get the most out of your Multi Tech product If you have any questions about the operation of this unit please call 800 972 2439 USA and Canada or 763 785 3500 international and local Please have modem information available You can also contact Technical Support by e mail at the following addresses Country Email Telephone France support multitech fr 33 1 64 61 09 81 India support multitechindia com 91 124 6340778 U K support multitech co uk 44 118 959 7774 U S A Canada tsupport multitech com 800 972 2439 Rest of world tsupport multitech com 763 717 5863 Please note the status of the modem before contacting Technical Support Status information can include the state of the LED indicators screen messages diagnostic test results problems with a specific application etc MTA128ST NT 47 Appendices Appendix A Contiguration Profiles Quick Setup Factory Profiles For quick setup the MTA128ST NT includes six Quick Setup Factory Profiles each of which is configured for a specific type of port operation You can load a Quick Setup Factory Profile into active memory by using the command amp Fn in which nis the number of the profile you wish to load If you wish you can then customize the profile and store it using the SW command so that it loads automatically when the MTA128ST NT is turned on or reset These profiles are stored
76. ice COM port A serial communications port on a personal computer Normally there are two COM1 and COM2 CPE customer premise equipment The generic term for data communications and or terminal equipment that resides at the user site and is owned by the user e g not telephone company equip ment D DCE data communications equipment Any device that serves as the port of entry from the user equipment to a telecommunications facility A modem is a DCE for the telephone network PSTN that is commonly on site at the user s premises Packet Switched Networks have another level of DCE that is most often located at a central MTA128ST NT Glossary office D channel A non ransparent digital ISDN channel that operates at 16K or 64 Kbps used for call control signalling along with one or more B channels The D demand channel signal can control call setup call teardown and invocation of Supplementary Services Is also used for telemetry and for low speed low priority packet switched data Contrast with B channel default A preset value or option in software packages or in hard ware configuration that is used unless you specify otherwise device driver Software that controls how a computer communi cates with a device such as a printer or mouse digital data Information represented by descrete values or condi tions contrast analog data digital PBX A private branch exchange that operates internally on
77. ice Coding LED Indicators Data Rates Async Data Format Data Connections Command Interface Connectors Serial Interfaces Switches PCM A Law Law switch protocol dependent 10 front panel LED indicators Transmit Data Receive Data Link Status B1 Active B2 Active Terminal Ready Off Hook AUX port 128 Kbps P1 Active data protocol P2 Active data protocol 300 1 2K 2 4K 4 8K 9 6K 19 2K 38 4K 56K 57 6K 64K 115 2K 230 4K and 460 8K bps 7 bit data odd even parity 1 start stop 8 bit no parity 36 baud rate parity settings via S register Baud rates of 300 460 8K bps with even space mark odd or no parity Two ISDN B channels One ISDN D channel One analog port for connecting a standard telephone modem or fax machine AT commands S registers result codes ConfigMenu firmware configuration utility Windows 98 NT ME configuration utility Dial Up Networking DUN ISDN RJ 45 female receptacle 4 wire S T accepts connection cable to the network provider s NT1 device or 2 wire U interface AUX RJ 11 female receptacle 2 wire voice service Serial Port female DB 25 RS232E V 24 ITU T V 24 EIA TIA RS232E Two position power switch Power Requirements Two prong outlet mounted transformer included 240 VAC 50 60 Hz Dimensions Environmental 15 0 cm x 10 7 cm x 2 8 cm L x W x D Temperature range 0 40 C 32 104 F Humidity range 20 90 noncondensing Power Consumption 4 watt
78. in band escape sequence is AT lt er gt To change the in band escape character change the value in register S2 e Out of band where the escape sequence is outside the data stream The out of band escape sequence is lt break gt AT lt cr gt You can send the break signal in the out of band escape sequence only from software not by pressing SHIFT BREAK on your keyboard When it detects the escape sequence the MTA128ST NT enters online command mode where it responds to commands while maintaining the connection with the remote device The MTA128ST NT s command buffer can store 80 characters including spaces and other characters used in telephone numbers If you mistype a command string edit it by using the backspace or the delete key but only before you press ENTER As you type a command string it appears on your monitor screen letting you verify your input as you type it The AT commands recognized by the MTA128ST NT are listed by function in this chapter first in an abbreviated list For an alphabetical list of AT commands see the AT commands documents on the CD included with this product AT Commands by Function MTA12 26 AT Al Return or Enter AT lt CR gt lt BREAK gt AT lt CR gt AT Commands S Registers and Result Codes Attention code Repeat AT Command Command execution In band escape code Out of band escape code General Information Commands In Ln IL gt MIBn Display Product Information
79. ing Period S62 by the Low Threshold Sampling Period S62 value in Kbps Total bits received S62 Low Throughput Average Or divide total number of bits transmitted to the PC not including start stop or parity bits during the Low Threshold Sampling Period S62 by the Low Threshold Sampling Period S62 value in Kbps Total bits transmitted S62 Low Throughput Average If either average transmitted or received equals or is less than the Low Threshold S63 and there are two active data channels the TA disconnects the second data channel MTA128ST NT 42 PPP MLPPP e Ideally the second channel should be added quickly short High Threshold Sampling Period S60 with a relatively small High Throughput Threshold S61 Also the second channel should not be disconnected for a relatively long period of time long Low Threshold Sampling Period S62 with a small Low Throughput Threshold S63 e If data transmits or is received in bursts and the TA adds and removes a channel too quickly increase the High Threshold Sampling Period S60 and the Low Threshold Sampling Period S62 and decrease the Low Throughput Threshold S63 Call Bumping S register S64 e Call Bumping is not available to the host TA if Dynamic Bandwidth Allocation is disabled S59 0 or if the Dynamic Bandwidth Allocation scheme is PPP S59 2 e If the analog device goes off hook or there is an indication of an incoming analog cal
80. ing up the 128K LED However if that dial command was given by Windows Dial Up Networking for example then there is a chance that the TA dials two channels and brings up the 128K LED if the user name and password are correct if the IP address is okay and if the peer allows a MultiLink connection If MultiLink is not allowed then the TA uses one channel for the PPP connection If the user name or password are invalid or incorrect the connection is terminated If an IP address is in conflict the connection is terminated as well Software Applications that can Format PPP Data Software applications that can format PPP Data for Microsoft compatible PCs include Windows Dial Up Networking DUN and WinSock Software applications that can format PPP Data for Apple Macintoshes include OT PPP MacPPP FreePPP GearBox and pppd via Internet Connect Mac OS X Dynamic Bandwidth Allocation DBA Dynamic Bandwidth Allocation DBA supports the addition and removal of data channels according to the level of throughput through the TA and according to analog POTS port use If throughput is above a given threshold a second data channel is added to facilitate higher throughput MTA128ST NT 41 PPP MLPPP If throughput drops below a given threshold the second channel is removed to save the cost of having the second B channel active but not fully used If an outgoing analog call is desired or there is an incoming analog call a data channel can be
81. l and both B channels are in use by a data call the TA drops the second B channel and rings the analog device e Ifthe analog device goes on hook or the peer disconnects the analog call the TA adds the second B channel again according to whether BOD is enabled or disabled S60 If BOD is disabled S60 0 the second channel is added immediately If BOD is enabled S60 is non zero the second channel is added after the High Threshold Sampling Period S60 and High Throughput Threshold S61 determine whether throughput is high enough to allow adding the second channel MTA128ST NT 43 Warranty Service and Technical Support Chapter 7 Warranty Service and Tech Support Multi Tech Systems Inc Warranty amp Repairs Policies Warranty Multi Tech Systems Inc hereafter MTS warrants that its products will be free from defects in material or workmanship for a period of two five or ten years depending on model from date of purchase or if proof of purchase is not provided two five or ten years depending on model from date of shipment MTS MAKES NO OTHER WARRANTY EXPRESS OR IMPLIED AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED This warranty does not apply to any products which have been damaged by lightning storms water or power surges or which have been neglected altered abused used for a purpose other than the one for which they were manufactured repai
82. lections for POTS Ring Signal Single or Dual Cadence POTS Ring Signal POTS Ring Signal First Active Duration POTS Ring Signal First Idle Duration POTS Ring Signal Second Active Duration POTS Ring Signal Second Idle Duration MultiLink Endpoint Discriminator Type Maximum CLEAR Buffer Size Maximum V 110 Buffer Size ST only V 110 Network Rate ST only V 110 Network Rate Control ST only Persistent DTR Dialing Delay Link Setup Timeout Delay Before Trying V 110 Data to Terminal Delay Data to B channel Delay V 110 T1 Time out INS64 Analog Call Origination Delay B Channel Answer Rate Note V 110 is supported by some MTA128ST models only 30 Result Codes AT Commands S Registers and Result Codes When the MTA128ST NT receives an AT command from the computer or terminal it attempts to execute the command then sends a status message to the computer or terminal that reports the result of the command The MTA128ST NT provides you with several of these response messages or result codes which can be displayed on your monitor or intercepted and used by your communications software Using the V command you can select whether the result codes are terse numbers or verbose words The MTA128ST NT s result codes are listed below Note that the speed of an ISDN channel is always either 56 Kbps or 64 Kbps Connect messages indicate the speed of the connection between the MTA128ST NT and your computer or terminal TERSE VERBOSE
83. lling etc to our Repair Accounting department at 800 328 9717 or 763 785 3500 or e mail misrepair multitech com Repairs for damages caused by lightning storms water power surges incorrect installation physical abuse or user caused damages are billed on a time plus materials basis International Customers outside U S A and Canada Your original point of purchase reseller may offer the quickest and most economical repair option for your Multi Tech product You may also contact any Multi Tech sales office for information about the nearest distributor or other repair service for your Multi Tech product http www multitech com COMPANY offices DEFAULT ASP In the event that factory service is required products may be shipped freight prepaid to our Mounds View Minnesota factory Recommended international shipment methods are via Federal Express UPS or DHL courier services or by airmail parcel post shipments made by any other method will be refused A Returned Materials Authorization RMA is required for products shipped from outside the U S A and Canada Please contact us for return authorization and shipping instructions on any international shipments to the U S A Please include inside the shipping box a description of the problem a return shipping address must have street address not P O Box your telephone number and if the product is out of warranty a check drawn on a U S bank or your company s purchase order for
84. lt Refer to before you start in Chapter 3 for your network call control configuration and comport settings 4 To change one or more settings type AT CONFIG press ENTER and follow the ConfigMenu directions 5 Type AT amp W and press ENTER to store your settings The following is a description of the menus Network Configuration Menu Select this menu to configure network parameters such as the switch type data and voice TEls and datea nd voice MSNs When you finish select Save Hetwork Configuration to save your work Call Control Configuration Menu Select this menu to change how the MTA128ST NT originates and answers calls Options include Auto Answer Rings to Answer Dialing Method and Persistent DTR Dialing Data Protocols Menu Select this menu to change the rate adaption protocol used by the MTA128ST NT Stored Numbers Menu Select this menu to store up to ten phone numbers with a maximum of 25 characters each Stored number 0 is the phone number that is dialed if you enable persistent DTR dialing Port Control Configuration Menu Select this menu to configure the MTA128ST NT s serial port including how the MTA128ST NT responds to control signals on the RS232 interface POTS Port Configuration Menu Select this menu to configure the MTA128ST NT s POTS port which includes the ring type frequency and pattern Help Menu Select this menu for help on navigating through the MTA128ST NT menu system Configuration via AT Command
85. ly connected to the MTA128ST NT and to the wall outlet or power strip If the power strip is on and the MTA128ST NT is switched on try moving the TA s power supply to another outlet on the power strip Test that the outlet is live by plugging a lamp into it The MTA128ST NT or power supply may be defective If you have another Multi Tech MTA128ST NT try swapping MTA128ST NTs If the problem goes away the first MTA128ST NT or power supply may be defective Call Tech Support for assistance Caution Do not under any circumstances replace the power supply module with one designed for another product as it may damage the MTA128ST NT and void your warranty The MTA128ST NT does not respond to commands Make sure the MTA128ST NT is plugged in and turned on See None of the LEDs Light When the MTA128ST NT Is On Try resetting your MTA128ST NT by turning it off and on Make sure you are issuing the MTA128ST NT commands from the data communications software either automatically or manually in terminal mode You cannot send commands to the MTA128ST NT from the DOS prompt Make sure you are in terminal mode in your data communications program Then type AT and press ENTER If you get an OK response your connections are good and the problem likely is in your phonebook entry or session settings If you don t get an OK the problem may still be in the communications software Make sure you have done whatever is necessary in your softwa
86. munications software as analog modems e Flash memory for easy firmware upgrades ISDN BRI Line Before running the ISDN adapter you need to get an ISDN BRI Basic Rate Interface line from your local telephone company Your ISDN service provider will provide information to you about the ISDN central switch type pertinent subscriber information and SPID Service Profile ID number s if required SPID Service Profile ID The Service Profile ID SPID is applicable in the U S only SPIDs are a series of numbers that inform the central office switch which services and features to provide to an ISDN device The generic SPID format comprises 14 digits The first 10 digits are the main telephone number on the terminal The last 4 digits are dependent on the number of terminals on the interface and the services they support NT1 Connection An ISDN Basic Rate BRI U Loop consists of 2 conductors from the CO telephone company central office to the customer premises The equipment on both sides of the U loop has been designed to deal with the long length of the U loop and the noisy environment it operates in At the customer premises the U loop is terminated by an NT1 network termination 1 device An NT1 is a device which provides an interface between the two wire twisted pairs used by telephone companies in their ISDN BRI network and an end user s four wire terminal equipment The NT1 drives an S T bus which is usually made up of 4 wires but in some c
87. n some fax data modems that can differentiate between DTMF or fax calling tones A typical applica tion would be a program that routes calls to specific communica tions applications depending either on the type of call or ona DTMF tone added to a dialing string E EEPROM Electrically Eraseable Programmable Read only Memory Upgradable memory chip often used to store firmware EISA Enhanced Industry Standard Architecture Pronounced eesa The purpose of the EISA bus is to provide a 32 bit bus for faster throughputs while maintaining backward compatibility with the classic ISA bus architecture ET exchange termination The carrier s local exchange switch Contrast with LT loop termination exchange A unit public or private that can consist of one or more central offices established to serve a specified area An exchange typically has a single rate of charges tariffs that has previously 60 been approved by a regulatory group exchange area A geographical area with a uniform set of charges tariffs approved by a regulatory group for telephone services Calls between any two points within an exchange area are local calls See digital PBX and PBX F fax facsimile Refers to the bit mapped rendition of a graphics oriented document fax or to the electronic transmission of the image over telephone lines bit mapped approximation of a graphical document and therefore cannot be accurately interpreted according to
88. ncompatible with the compression used by the MTA128ST NT Disconnect the data connection and the give the Sonix the command AT HO that s a double quote and then establish the data connection again The garbage characters should disappear Each time a 3Com Sonix terminal adapter originates a V 120 call the MTA128ST answers the call as a V 110 call The Sonix sends V 110 information in the SETUP message to the network Since the MTA128ST s default is with Auto Protocol Detection enabled ATS52 1 it looks at SETUP information from the Sonix and determines erroneously that it is a V 110 call Disable Auto Protocol Detection in the MTA128ST with the command ATS52 0 and try the connection again The MTA128ST NT won t connect to an ELSA terminal adapter with the V 120 data protocol Most likely the ELSA terminal adapter has compression turned on The compression used by the ELSA terminal adapter is incompatible with compression used by the MTA128ST NT Give the ELSA the command AT CO to disable compression and try again Apple Macintosh Compatibility The IWay Hopper works with all Macintosh models with a serial port Some models may require a USB to serial adapter since the MTA128ST NT is a serial RS 232 device Scripts are provided for Mac OS 8 through Mac OS X These scripts also work with Mac OS 7 x with the Apple Internet Connection Kit installed OS 8 and 8 1 have the Apple Internet Connection Kit built in and Mac OS 8 5 through Mac OS
89. ne numbers include a plus sign and an exclamation mark Note In Windows Dial Up Networking if the Use Country Code and Area Code box is checked in the Properties window for dial up connection the bundling modifier e amp or is removed from the dialing string when the user attempts to make a connection The solution is to not check the Use Country Code and Area Code box or to simply add the bundling dial modifier to the phone number at the time of connection Canceling a Call To cancel a call before the MTA128ST NT makes a connection press any key Storing a Telephone Number To store a telephone number type amp Zn x in terminal mode where nis the number of the memory register in which the number is to be stored and x is the dial command string that you want to store For example type AT amp Z9 763 785 3500 lt cr gt to store the number 763 785 3500 in memory register 9 Dialing a Stored Telephone Number To dial a stored telephone number type DSn in terminal mode where nis the location of the number you wish to dial For example type ATDS3 lt cr gt dials a telephone stored in memory register 3 location MTA128ST NT 32 AT Commands S Registers and Result Codes Displaying a Stored Number To display a stored telephone number type amp Zn in terminal mode where nis the memory register in which the number is stored For example type AT amp Z5 lt cr gt to display the telephone number in memory register 5 To list
90. ntification contrast logical channel or virtual channel PDN public data network A packet switched network that is available to the public for individual subscriber use Typically controlled by a government or a national monopoly port A location for input or output data exchange Computers muxes etc have ports for various purposes PPP Point to Point Protocol A protocol that lets a computer user access a TCP IP address using an ISDN terminal adapter or a high speed modem over a standard telephone line PRI Primary Rate Interface One of two forms of ISDN service PRI provides 23 64 Kbps B channels for video voice or data and one 64 Kbps D channel for control 62 information Usually used to connect high cpacity CPE such as PBXs to the network Also called 23B D in the U S and 30B D in Europe See also JSDN and BRI primitive An abstract representation of interaction accross the access points indicating that information is being passed between the service user and the service provider The OSI Reference Model defines four types of primitives Request Indication Response and Confirm PSTN public switched telephone network The group of circuit switching voice carriers which are commonly used as analog data communications services A worldwide public voice telephone network that is used as a telecommunications medium for the transmission of voice data and other information pulse dialing One of two me
91. o contact this TA once it is attached to the ISDN AT commands AT N1 and AT IN1 Note SPIDs and DNs are used only by the U S NI 1 AT amp T 5ESS and DMS 100 switch types Call Control Configuration Persistent DTR Dialing A high DTR Data Terminal Ready signal on the RS232 V 24 serial port indicates your computer or terminal is ready to communicate with your TA DTR normally goes high when a communication program starts or is ready to dial Persistent DTR dialing enables the TA to automatically redial the number stored in memory location 0 whenever DTR is high and the serial port does not have an active call You can enable or disable this feature AT commana D Auto Answer Data Calls Rings to Answer Select Auto Answer if you want your TA to automatically answer all incoming data calls this option does not affect the analog port The Rings to Answer number in the range of 1 to 255 selects the number of rings the TA waits before answering an incoming call The default is one ring AT command S0 Dialing Method Select either the Enbloc or the Overlap dialing method for use when establishing a data call Your ISDN provider determines the dialing method The enbloc method is used for most ISDN dialing however you can select the overlap method if you are working with a private network AT command A97 Data Protocol The data protocol also known as the B channel protocol and the rate adaption protocol is the language
92. o unused ones if possible Right click on My Computer select Properties from the menu click on the Device Manager tab double click on Ports then double click on the Communications Port your MTA128ST NT is connected to In the port s Properties sheet click on the Resources tab to see the port s Input Output range and Interrupt Request If another device is using the same address range or IRQ it will appear in the Conflicting Device List Uncheck Use Automatic Settings to change the port s settings so they do not conflict with the other device or select the port the conflicting device is on and change it instead If you need to open your computer to change switches or jumpers on the conflicting device refer to the device s documentation e The serial port may be defective If you have another serial port install the MTA128ST NT on it change the COM port setting in your software and try again e If using serial rates above 115 200 baud make sure the serial port can handle higher rates Most standard serial ports have a maximum serial rate of 115 200 To handle serial rates of 230 400 baud and 460 800 baud you need a high speed serial port Even though some terminal emulation programs allow you to select higher rates the serial ports cannot always handle those rates e The MTA128ST NT may be defective If you have another Multi Tech MTA128ST NT try swapping MTA128ST NTs If the problem goes away the first MTA128ST NT is possibly def
93. of your computer used by a device such as an expansion card a serial port or an internal modem The address is used for communication between software and a device IP address A unique 32 bit address for a specific TCP IP host on a network Normally printed in dotted decimal format e g 129 128 44 227 IRQ interrupt request The notification a processor receives when another portion of the computer s hardware requires its attention IRQs are numbered so that the device issuing the IRQ can be identified and so that IRQs can be prioritized ISA Industry Standards Architecture Pronounced ice a The classic 8 or 16 bit architecture introduced with IBM s PC AT computer Due to speed constraints IBM later introduced a restruc tured Micro Channel Architecture with a 32 bit bus and increased addressing capabilities ISDN Integrated Services Digital Network International telecom munications standard for transmitting voice video and data over a digital communications line ITU T formerly CCITT International Telecommunications Union Telecommunications Sector the United Nations organization that prepares standards for resolving communications issues and problems L LAPB Link Access Procedure Balanced Based on the X 25 Layer 2 specification A full duplex point to point bit synchronous protocol commonly used as a data link control protocol to interface X 25 DTEs LAPB is the link initialization procedure that
94. on the cable is plugged into the correct port the communications software is configured correctly and you still don t get an OK the fault may be in the serial cable Make sure it is firmly connected at both ends MTA128ST NT 36 Troubleshooting e Is this the first time you have used the cable If so check the cable description on the packaging to make sure the cable is correct for your computer e Peripheral expansion cards such as bus mouse and sound cards may include a serial port preconfig ured as COM1 or COM2 The extra serial port or the card itself may use the same COM port memory address or interrupt request IRQ as your communications port Be sure to disable any unused ports To look for address or IRQ conflicts select File Run in Program Manager type MSD and press ENTER Then select Mouse COM Ports and IRQ Status and note the addresses and IRQs that are in use If you find an IRQ conflict note which IRQs are not being used then change one of the conflicting devices to use one of the unused IRQs If you find an address conflict change the address of one of the conflicting devices To change a port address or IRQ double click the Control Panel icon then the Ports icon Click on the port you want to change click Settings click Advanced and select the new port address and or interrupt If you wish to use COM or COM4 note that COM3 shares an IRQ with COM1 as does COM4 with COM2 so you should change their IRQs t
95. onfiguration data MSN 14 dataTEI 13 DNs 14 network switch 13 SPIDs 14 voice MSN 14 voice TEI 13 networkconfiguration 13 NTI Connection 5 O online command mode 32 Ordering Codes IOCs 50 Ordering ISDN Without IOCs 52 ordering replacement parts 46 P parity 15 power consumption 10 requirements 10 strip 36 supply 36 PPP connections 41 PPP software applications 41 profiles 48 R registering your product 45 remote node operation 13 replacement parts 46 result codes 37 Returned Materials Authorization 45 rings to answer option 14 MTA128ST NT Index S S registers SO 33 38 safety 11 serial port 10 32 36 37 39 service profile idenfiier SPID 14 setup 48 specifications technical 9 speed serial port 32 SPID service profile identifier 14 stop bits 15 storing telephone number 32 support technical 47 switch type 10 T technical support 47 TEI 13 terminal endpoint identifier TEI 13 terminal mode 36 testing 36 U UART 39 16550 39 Using ISDN Ordering Codes IOCs 50 V V 110 protocol 48 V 120 protocol 14 48 voice coding 10 W warranty 10 weight 10 Windows 3 1 39 X X 75 protocol 15 48 66
96. or packet mode These bearer services are defined in terms of a number of attributes which include mode circuit or packet structure bit stream or octet stream transfer rate e g 64Kbps transfer capability basically the content for instance speech 7Khz audio video or unrestricted and several other attributes that specify protocols to use and other things The attributes of the bearer service are encoded into a Bearer Code or BC that is sent everytime a new connection is being set up In theory this allows the switches to dynamically choose from a variety of different switching paths techniques depending on requirements In practice the SPID is used to determine what services are needed for switching as this greatly simplifies things for the telephone companies The Bearer Code will not be completely ignored however there are certain bearer services that will be unavailable on your B channels based on how they are configured It is important to note that the Bearer Code is sent to the switch every time a connection is established However the SPID is only sent to the switch when you physically attach your equipment to your phone line At this time the switch gives your device a Terminal Equipment Identifier TEI which is used from then on to identify all connection requests from that piece of equipment This allows the switch to look at the TEI and Bearer Code determine the SPID and see if the Bearer Code and the SPID match up
97. or visit our web site at http www multitech com programs orc for details on rates and coverage s Please direct your questions regarding technical matters product configuration verification that the product is defective etc to our Technical Support department at 800 972 2439 or email tsupport multitech com Please direct your questions regarding repair expediting receiving shipping billing etc to our Repair Accounting department at 800 328 9717 or 763 717 5631 or email mtsrepair multitech com Repairs for damages caused by lightning storms water power surges incorrect installation physical abuse or user caused damages are billed on a time plus materials basis MTA128ST NT 44 Warranty Service and Technical Support Repair Procedures for International Customers Outside U S A and Canada Your original point of purchase Reseller may offer the quickest and most economical repair option for your Multi Tech product You may also contact any Multi Tech sales office for information about the nearest distributor or other repair service for your Multi Tech product http Awww multitech com COMPANY offices DEFAULT ASP In the event that factory service is required products may be shipped freight prepaid to our Mounds View Minnesota factory Recommended international shipment methods are via Federal Express UPS or DHL courier services or by airmail parcel post shipments made by any other method will be r
98. protocol does not result in the use of two B channels at this time Making PPP MLPPP Connections Making a PPP or MLPPP connection is not as simple as using a terminal emulation program and dialing one or two phone numbers Using the PPP data protocol provided by the TA Z 9 requires that the TA receives PPP formatted data from the terminal If the TA does not receive PPP formatted data the data is discarded by the TA and never sent to the peer The TA can receive PPP formatted data from the peer and send it to the terminal but if it is sending the data to a terminal emulation program running on the terminal the data appears as garbage The PPP data protocol requires PPP data to be sent from the terminal in order for the data to be sent to the other side The MultiLink protocol requires the PPP protocol to establish itself on one B channel before the second channel is dialed The LCP can be established only if data is sent by the terminal to the TA Negotiation actually occurs between the local terminal and the remote peer The TA simply views the negotiation so it knows how to negotiate on the second B channel When the second B channel connects the local terminal is unaware and doesn t participate in the LCP negotiation Therefore the TA must mimic the negotiation that was witnessed on the first channel For example sending ATDT5551000 amp 5553000 from a terminal emulation program to the TA does NOT cause the TA to dial two channels and br
99. r side can create problems if you have more than one device since multiple devices attached to the S T interface must all have the same polarity If the MTA128ST NT reports BUSY the other number may be busy in which case you should try again later If the MTA128ST NT reports NO CARRIER no connection was made You might have dialed the correct number but the other computer or software was turned off or faulty Check the number and try again or try calling another system to make sure your TA is working Also check that you accurately configured the TA with the correct switch type TEls data protocols and other parameters needed for a successful call see Chapter 3 You can place data calls but not voice calls or vice versa You might not have ordered both voice and data service from your ISDN provider Check your contract or latest statement of service from your ISDN provider Your ISDN provider may have programmed the switch incorrectly Call the provider You cannot place two simultaneous data calls You may not have ordered an ISDN line configuration that supports two simultaneous calls Check your contract or latest statement of service from your ISDN provider Also your ISDN provider may have programmed the switch incorrectly Call the provider You may have misconfigured your MTA128ST NT to dial two simultaneous data calls The command AT amp J1 amp W0O lt cr gt is used to indicate whether outgoing calls should be made on two B
100. ral office CO to identify the various TAs connected to the ISDN network The TEI number can be fixed range 0 63 or dynamic and is assigned automatically at the CO each time the TA connects to the ISDN interface and powers up Click Next when you are finished 8 The SPID Service Profile Identifier North America only is displayed with Please enter the data SPID voice SPID data directory numbers and voice directory number of your network sISDN TA Configuration Wizard EN Multi ec SPID Please enter the data SPID voice SPID data directory numbers and voice directory number of your network Click Next when you are done Data Directory Number 0 Voice Directory Number Data Directory Number 2 Ir Daa SPID 0 Voice SPID ce mm MTA128ST NT 20 Configuration Utilities SPID is only used in North America A SPID is the ISDN network parameter for local terminal identification and tracking A SPID is assigned by your local ISDN provider when you subscribe they are in the form of a string of up to 20 characters A SPID points to a specific location in the provider s central office memory where service and feature parameters are stored Click Next when you have entered your SPID information 9 The Call Control Setup screen is displayed with Please select the settings for call control ISDN TA Configuration Wizard Multi ei Call Control Setup Please select the settings for call control
101. re to make a port connection Not all communications pro grams connect automatically to the COM port Some connect when the software loads and remain connected until the program ends Others like MultiExpress Terminal can disconnect without ending the program make sure the Connect icon looks plugged in MultiExpress Terminal also allows multiple terminals to be open but only one can access the MTA128ST NT at a time If MultiExpress Terminal reports that it cannot make a connection yet the MTA128ST NT s TR indicator is on click on the Window menu to see if more than one terminal is open The MTA128ST NT s TR indicator shows that the software has made a connection with the TA through the COM port open but only one can access the MTA128ST NT at a time If MultiExpress Terminal reports that it cannot make a connection yet the MTA128ST NT s TR indicator is on click on the Window menu to see if more than one terminal is open The MTA128ST NT s TR indicator shows that the software has made a connection with the TA through the COM port Your communications software settings may not match the physical port the MTA128ST NT is connected to The serial cable may be plugged into the wrong connector check your computer documentation to make sure Or you may have selected a COM port in your software other than the one the MTA128ST NT is physically connected to compare the settings in your software to the physical connection If the MTA128ST NT is
102. receives an AT command from the computer AT commands P4 P3 P6 DTR Detect Time Sets the time in 0 1 second increments that DTR must remain low before the TA disconnects The default value is 0 5 second however you can set it anywhere within the range 0 255 0 05 25 5 seconds AT command 25 DCD Drop Time Sets the time in 0 1 second increments that a carrier must be lost before the TA disconnects The default value is 0 7 seconds however you can set it anywhere in the range 0 254 0 25 4 seconds Setting DCD Drop Time to 255 causes the TA not to disconnect with loss of carrier when DCD Control is set to Momentary Drop AT command S10 MTA128ST NT 15 Configuration Utilities DTR Control A high DTR Data Terminal Ready signal on the RS232 serial port indicates your computer or terminal is ready to communicate with your TA It normally goes high when a communication program starts or is ready to dial Normal causes the TA to break the link and go into command mode when DTR drops Ignore causes the TA to ignore the DTR signal Reset on DTR causes the TA to reset when DTR drops for the time specified in register S25 AT command amp D CTS Control A high CTS Clear to Send signal on the RS232 serial port indicates the TA is ready to receive data Normally it follows the state of the RTS signal Select Normal to make CTS act normally Select Always On to force CTS high when the TA is offline When the
103. rectory number M5 is not available for services provided with Northern Telecom or AT amp T switches Since two directory numbers are required for 2B operation use Capability S MTA128ST NT 51 Appendices Ordering ISDN Without IOCs This section guides you and your telephone company in specifying and obtaining ISDN service when IOCs are not used To support most ISDN TA features your telephone service must meet certain requirements These requirements are described in the following sections Some features may be added or deleted depending on your actual data service needs and availability in your area Before ordering talk to your telephone company about which of the services listed on the following pages are provided in your area The following form was created for you to complete and fax to your telephone company to request the proper ISDN line for use with your ISDN TA module Name Address City State ZIP Code Daytime Telephone Number 1 Request an ISDN BRI Basic Rate Interface line with e U Interface Reference Point and e 2B1Q Line Coding 2 Choose one of the following 2B D Service supports up to 128K bps or 1B D Service supports up to 64K bps 3 Indicate the ISDN Switch Type and Software Protocol you will be using AT amp T 5ESS with ____ Custom 5E6 and later software or _____NI1 National ISDN 1 ___ Northern Telecom DMS 100 with ___ BCS 32 and later software Pvc1 or
104. red by Customer or any party without MTS s written authorization or used in any manner inconsistent with MTS s instructions MTS s entire obligation under this warranty shall be limited at MTS s option to repair or replacement of any products which prove to be defective within the warranty period or at MTS s option issuance of a refund of the purchase price Defective products must be returned by Customer to MTS s factory transportation prepaid MTS WILL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES AND UNDER NO CIRCUMSTANCES WILL ITS LIABILITY EXCEED THE PRICE FOR DEFECTIVE PRODUCTS Repair Procedures for U S and Canadian Customers In the event that service is required products may be shipped freight prepaid to our Mounds View Minnesota factory Multi Tech Systems Inc 2205 Woodale Drive Mounds View MN 55112 Attn Repairs Serial A Returned Materials Authorization RMA is not required Return shipping charges surface will be paid by MTS Please include inside the shipping box a description of the problem a return shipping address must have street address not P O Box your telephone number and if the product is out of warranty a check or purchase order for repair charges For out of warranty repair charges go to www multitech com documents warranties Extended two year overnight replacement service agreements are available for selected products Please call MTS at 888 288 5470 extension 5308
105. repair charges Repaired units will be shipped freight collect unless other arrangements are made in advance Please direct questions regarding technical matters product configuration verification that the product is defective etc to our Technical Support department nearest you as listed at http Avww multitech com COMPANY offices DEFAULT ASP or e mail tsupport multitech com When calling the U S please direct questions regarding repair expediting receiving shipping billing etc to our Repair Accounting department at 763 717 5631 in the U S A or e mail mtsrepair multitech com Repairs for damages caused by lightning storms water power surges incorrect installation physical abuse or user caused damages are billed on a time plus materials basis International Distributors Procedures for international distributors of Multi Tech products are on the Distributor Web site at http www multitech com PARTNERS ogin Replacement Parts SupplyNet Inc can supply you with replacement power supplies cables and connectors for selected Multi Tech products You can place an order with SupplyNet via mail phone fax or the Internet at the following addresses Mail SupplyNet Inc 614 Corporate Way Valley Cottage NY 10989 Phone 800 826 0279 Fax 914 267 2420 Email info thesupplynet com Internet http www thesupplynet com MTA128ST NT 46 Warranty Service and Technical Support Technical Support Multi Tec
106. rom a computer running a communications program in terminal mode This section describes how to use AT commands for basic operations such as calling answering a call and hanging up The MTA128ST NT has three modes of operation They are e Offline Command Mode MTA128ST NT communicates with the terminal or computer and responds to AT commands There is no data communications link with a remote device MTA128ST NT 31 AT Commands S Registers and Result Codes e Data Mode MTA128ST NT enters data mode when it makes a successful data communications link with a remote device In data mode the TA can send and receive data but it does not respond to AT commands Instead it treats them as data and transmits them to the remote device e Online Command Mode MTA128ST NT responds to AT commands while maintaining a data communications link however transmission of data is suspended To enter online command mode from data mode type the escape sequence AT lt cr gt To return to data mode from online command mode type ATO lt cr gt Making a Call Before you can place a data call configure the MTA128ST NT for the local switch type serial port speed and the data type of the ISDN device you want to call See Chapter 3 Configuration Utilities Dialing To dial a number using AT commands you must first start a data communications program In the program s terminal mode type ATDxXxxxxxx lt cr gt where xxxxxxx is the telephone number
107. s Weight Warranty MTA128ST NT 224 g 8 oz 5 years 10 Hardware Installation Chapter 2 Hardware Installation This chapter shows you step by step how to set up your MTA128ST NT terminal adapter TA to your computer power network terminator and an auxiliary analog device Please follow these instructions carefully to avoid damage to your TA Safety Warnings e Use this product only with UL listed and CUL listed computers e Never install phone wiring during a lightning storm e Never install a phone jack in a wet location unless the jack is specifically designed for wet locations e Never touch uninsulated phone wires or terminals unless the phone line has been disconnected at the network interface e Use caution when installing or modifying phone lines e Avoid using a phone other than a cordless type during an electrical storm there is a risk of electrical shock from lightning e Do not use a phone in the vicinity of a gas leak e To reduce the risk of fire use only 26 AWG or larger telephone line cord Connecting your TA Turn off your computer Place the modem in a convenient location connect it to your computer s serial port to the phone line to AC power and to your phone asana KM D an EA e e PHONE ISDN iSi P p vi STT E e Tami ER LUED litho oonooons kel Ei mmm q Cable Connections MTA128ST NT 11 Hardware Installation Connect th
108. s You can configure the MTA128ST NT by using AT commands just as you would configure an analog modem Use this method if you prefer to work with AT commands or if you have a special requirement not addressed by either of the configuration utilities Using AT Commands to Configure the MTA128ST NT 1 Connect a VT100 ANSI compatible terminal or a computer that has a communications program that has VT100 ANSI terminal emulation to the MTA128ST NT s serial port 2 Turnon the MTA128ST NT The MTA128ST NT automatically detects whether an ASCII or ANSI terminal is in use and adjusts accordingly 3 Start a data communication program and select the COM port where the MTA128ST NT is connected 4 Referring to your Before Your Start notes enter the desired AT commands in the terminal window of the data communications program 5 When you finish making changes use the amp W command to save your new configuration and to select it to automatically load when the MTA128ST NT is turned on 6 Quit the data communications program For more information on AT commands see the MTA128ST and MTA128NT AT Commands documents MTA128ST NT 58 Glossary Symbol 2B1Q 2 bits 1 quarternary A line code at layer one for the BRI U interface Two bits of data 2B are mapped into one of four line values 1Q or Iquarternary This coding scheme allows a single copper pair to carry 160 Kbps of information bidirectionally and simultaneously at a distance of up
109. s out of band signaling A system that uses a separate communica tions channel or frequency outside the voice band for signaling Modern systems use a separate channel either TDM or virtual SS7 uses messages for signaling that are carried on signaling links distinct from voice channels ISDN uses messages for signaling that are carried on the D channel distinct from the voice carried on the B channels Frame Relay and ATM use messages that are carried on a separate virtual connection reserved for signaling on hook The condition of a device which has not accessed a phone line In modem use this is equivalent to a telephone handset that has not been picked up In other words it can receive an incom ing call P packet data Packet mode calls packet mode The switching of chunks of information for different users using statistical multiplexing to send them over the same transmission facility ISDN packet mode capabilities are based on the ITU TSS Recommendation X 25 procedures PAP Password Authentication Protocol RFC1334 parity bit An extra bit attached to each byte of sync hronous data used to detect errors in transmission PBX private branch exchange A telephone exchange located on the customer s premises The PBX provides a circuit switching facility for tlephone extension lines within the building and access to the public telephone network See also exchange P channel PCHAN The ISDN physical channel ide
110. section can be used in attempting to troubleshoot debug or even correct a current problem Some S registers modify functionality of various features Some S registers modify the functionality of the debugging logging troubleshooting commands described in the additional documents on the system CD Debugging Logging Troubleshooting S Register Summary S register Function S47 Pulse dial Maximum Break Pulse Period S48 Pulse dial Maximum Interdigital Pause 72 EurolSDN Variant 78 Maximum Allowed V 110 Network Rate some models only 90 Local PPP Capabilities 91 Remote PPP Capabilities 92 Channel ID Information Element Octet 3 Settings 93 Blacklisting 94 Minimum Buffer Space After Trigger S95 Logging Buffer Functionality S96 Decode EPA Buffer Functionality S98 ISDN_MSG Size S99 Startup Options 100 Flow Control High Threshold 101 Flow Control Low Threshold 102 Data to Save for Decoding MTA128ST NT 35 Troubleshooting None of the LEDs light when the MTA128ST NT is on When you turn on the MTA128ST NT the LED indicators on the front panel should flash briefly as the TA runs a self test If the LEDs remain off the TA probably is not receiving power Make sure the MTA128ST NT s power switch is on especially if you normally turn on the TA by turning on a power strip If the power supply is plugged into a power strip make sure the power strip is plugged in and its power switch is on Make sure the power supply module is firm
111. tain uninterrupted service 6 If trouble is experienced with this equipment the model of which is indicated below please contact Multi Tech Systems Inc at the address shown below for details of how to have repairs made If the equipment is causing harm to the telephone network the telephone company may request you remove the equipment from the network until the problem is resolved 7 No repairs are to be made by you Repairs are to be made only by Multi Tech Systems or its licensees Unauthorized repairs void registration and warranty 8 This equipment cannot be used on public coin service provided by the telephone company Connection to Party Line Service is subject to state tariffs Contact the state public utility commission public service commission or corporation commission for information 9 If so required this equipment is hearing aid compatible Manufacturer Multi Tech Systems Inc Model Number MTA128NT FCC Registration AU7USA 24353 DD N Ringer Equivalence Modular Jack USOC RJ45 RJ11 Service Center in USA Multi Tech Systems Inc 2205 Woodale Drive Mounds View MN 55112 Voice 612 785 3500 FAX 612 785 9874 MTA128ST NT 56 Appendices Canadian Limitations Notice Notice The ringer equivalence number REN assigned to each terminal device provides an indication of the maximum number of terminals allowed to be connected to a telephone interface The termination of a interface may consist of any combin
112. the process toensure ISDN BRI loop availability for your location Provide the LEC rep with your correct address for the BRI service Provide the LEC rep with the type of equipment e g Multi Tech MTA128TA External ISDN Terminal Adapter and the protocol specifications that it supports Use the SDN BRI 2B D Line Ordering Checklist provided later in this document for the protocol specifications 5 Provide the LEC rep with the type of jack required by the MTA128NT Le RJ45 male 2 wire U Basic Rate Interface 6 Wait for notification of installation from the LEC ask the LEC rep what type of switch is used AT amp T 5ESS and NT DMS 100 are most prevalent 7 Ensure availability of an auxiliary analog line if you plan on using the MTA128NT s AUX RJ11 analog connector for a standard telephone connection Make sure you have a 115 VAC 60 Hz power outlet near your computer for the MTA128NT s two prong outlet mounted power transformer 8 Record all of the information provided by your LEC MTA128ST NT 49 Appendices Bearer Service The options of Circuit Switch Voice Bearer CSV and Circuit Switch Data Bearer CSD are broad categories of Bearer Services that the phone companies can provide Different bearer services provide different types of guarantees about the reliability and synchronization of the data There are currently ten different bearer services for circuit mode and three services f
113. thods of dialing a telephone usually associated with rotary dial phones Compare with tone dialing PVC permanent virtual circuit A connection between two endpoints dedicated to a single user In ISDN PVCs are established by network administration and are held for as long as the user subscribes to the service Q Q 921 The ITU T recommendation for user network interface layer 2 specifications for D channel signaling Similar to LAPD See also ISDN Q 931 The ITU T recommendation for user network interface layer 3 specifications for D channel signalling See also JSDN R R reference point Establishes the boundary between non ISDN compatible equipment TE 2 and the IDN network TAs are used to convert the communication protocol used by the non ISDN termnials to the desired BRI or PRI protocol Non ISDN TE2 terminal equipment connects to IDN at the R Reference point with a TA This interface may follow the RS232 or V 35 specification Also called the R interface Contrast S reference point RAM random access memory A computer s primary workspace All data must be stored in RAM even for a short while before software can use the processor to manipulate the data Before a PC can do anything useful it must move programs from disk to RAM When you turn it off all information in RAM is lost reference point A connection point between ISDN equipment classes rather than the specific protocol of the interconnection Can
114. transmitter An inte grated circuit that transmits and receives data on the serial port It converts parallel bytes into serial bytes for transmission and vice versa and generates and strips the start and stop bits appended to each character UTP unshielded twisted pair Telephone type wiring V V 110 One of the terminal rate adaptation protocols for the ISDN B channel V 110 is more hardware intensive than the V 120 B channel standard V 120 One of the terminal rate adaptation protocols for the ISDN B channel V 120 is more software intensive than the V 110 B channel standard Videotex A two way information retrieval service that can be accessed by terminals and by a TV set with installed decoder Allows interactive retrieval of information pages from a central resource See also JSDN virtual circuit A logical connection Used in packet switching wherin a logical connection is established between two devices at the start of transmission All information packets follow the same route and arrive in sequence but do not necessarily carry a complete address X X 25 ITU T s definition of a three level packet switching protocol to be used between packet mode DTEs and network DCEs X 25 corresponds with layer 3 of the 7 layer OSI model X 75 An ITU T standard for linking X 25 packet switched net works X 75 defines the connection between public networks i e for a gateway between X 25 networks 64 Ind
115. wise the TA will not negotiate the MultiLink Protocol MP option If the MultiLink Protocol option is not negotiated Dynamic Bandwidth Allocation is not possible DBA Features Bandwidth on Demand BOD S60 S61 S62 and S63 e Bandwidth on Demand BOD is not available to the host TA if Dynamic Bandwidth Allocation is disabled S59 0 or if the Dynamic Bandwidth Allocation scheme is PPP S59 2 e Setting S60 0 disables the BOD feature completely meaning S61 S62 and S63 are disabled as well e To calculate High Throughput Average in Kbps Divide the total number of bits received from the PC not including start stop or parity bits during the High Threshold Sampling Period S60 by the High Threshold Sampling Period S60 value in Kbps Total bits received S60 High Throughput Average Or divide the total number of bits transmitted to the PC don t include start stop or parity bits during the High Threshold Sampling Period S60 by the High Threshold Sampling Period S60 value in Kbps Total bits transmitted S60 High Throughput Average If the average transmitted or received exceeds the High Threshold S61 and only one data channel is active and the second B channel is not already in use the TA attempts to add a second data channel e To calculate Low Throughput Average in Kbps Divide total number of bits received from the PC not including start stop or parity bits during the Low Threshold Sampl

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