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ISDN Line Simulator User`s Manual

1. Some TEs do not permit Caller ID 40 400 00012 Rev E 40 400 00012 Rev E ISDN Line Simulator User s Manual Problem TE indicates an error when attempt is Solution Solution Solution Solution Solution Solution Solution made to place a call Ensure that the Status LED is constant On green Ensure that the Switch Type is set to the same protocol as the TE Ifthe TE accepts SPIDs ensure that the correct SPIDs for the port in use are programmed into TE Note do not use the same SPID more than once If the TE accepts SPIDs ensure that the Multi Point setting is Yes AT amp T only For basic mode terminals AT amp T Type A CACH should be set to off If the TE supports X 25 communication on the D channel the D Channel X 25 setting should be selected for either PVC or SVC Ensure that the B Channel setting is None Problem Calls are routed to the same DN when a Solution Solution Solution different DN is dialed When using more than one number per line make certain that Multi Point AT amp T only is set to Yes If the TE accepts 2 SPIDs do not program the same SPID into the TE more than once If a DN is programmed into the TE be sure to use the format required by the TE manufacturer e g 7 digits vs 10 digits Problem Every call indicates no channel available or Solution Solution Solution Solution Solution call is blocked Ensure that the
2. A two wire interface required by the FCC not the ITU T between the Local Exchange Carrier and the customer s NT1 Specification completed during 1Q87 by ANSI T1D1 3 X 25 ITU T recommendation specifying how user equipment DTE is to connect to a public packet switched network DCE Specifies Layer 1 2 and 3 Protocols 47
3. ISDN Line Simulator ILS C User s Manual AA TELTON E enhancing communications 40 400 00012 Rev E Note This manual covers Models ILS C 01 amp ILS C 02 Copyright Notice Copyright O 1996 2003 Teltone Corporation All Rights Reserved Trademarks Teltone is a registered trademark of Teltone Corporation Windows is a registered trademark of Microsoft Corporation Other company and product names may be trademarks or registered trademarks of their respective owners Teltone Corporation Bothell Washington 98021 USA Customer Service 425 951 3388 Technical Support 425 951 3390 Fax 425 487 2288 Email info teltone com Website www teltone com ii 40 400 00012 Rev E Table of Contents A ase EAE 1 PICAS NA SN A IL 1 Chapter 12 OI done 2 TES 2O000O per ota 3 What To Read Ned A A T aa E 6 Chapter 25 ISDN BR ero Saree A A 7 Technology ONE GaSe teenie ata eae Guat 7 Layer 1 Physical Operation ini ic T U Reference Poma ad 7 Network Termination 1 NT 1 ooononcnnnonccconononononoconanononancnnonnconnnnos 8 A A ES 8 Terminal Adapters tl atodos 8 Layer 2 Data Link OperatiOM ooooooccnoccnocccinnnconncconocono nono nono ncco nacion 8 Packet Addressing ad 8 A O 9 Layer 3 Network OperatiOO ooooococincccoococonoconnnonnnconccconocnnn cono ncon coco necinoos 9 Service Profile ID SPID AssignMeNt oooooccnnocnnoncconccconcconnconncconncnns 10 Chapter 3 Provisioning and OperatiOM oooonconinconococoncn
4. Problem have problems using my Motorola BitSurfer when the BitSurfer and ILS 2000 are configured for AT amp T 5ESS or DMS100 custom Solution The BitSurfer may be incompatible with the ILS 2000 when set up to emulate an AT amp T 5ESS or DMS100 Custom ISDN switch For reliable operation the BitSurfer ILS 2000 needs to be configured for NI 1 operation Problem Electronic key telephone drops calls when another incoming call is selected Solution Ensure that EKTS is enabled call appearances is set to the number of call appearances button light indicators on the TE and that the Key Hold setting is On Auto Hold 40 400 00012 Rev E ISDN Line Simulator User s Manual Reference Documents The following specification documents among others have been used for the development of the ILS 2000 ISDN Line Simulator ITU T Recommendation Q 931 ISDN Call Control Layer 3 ITU T Recommendation Q 921 ISDN LAP D Protocol Layer 2 ANSI T1 601 ISDN Physical Layer Specifications Layer 1 National ISDN Generic Guidelines for ISDN Terminal Equipment on Basic Rate Interface Bellcore SR NWT 002661 ISDN D Channel Exchange Access Signaling and Switching Requirements Layer 2 Bellcore TR TSY 000793 ISDN Access Call Control Switching and Signaling Requirements Layer 3 Bellcore TR TSY 000268 ISDN Features Common Switching and Signaling Generic Requirements Bellcore TR TSY 000847 ISDN Hold Capability for Managing Multiple Indepen
5. 40 400 00012 Rev E vii INTRODUCTION UNPACKING 40 400 00012 Rev E ISDN Line Simulator ISDN Integrated Systems Digital Network is a system which combines telephone and computer networking in a digital medium The ISDN BRI Basic Rate Interface is the interface for individual users to connect to the public telephone network An ISDN BRI is composed of three separate channels of information called 2B D that is two full duplex Bearer channels and one full duplex Data channel combined onto a single pair of wires The Teltone ILS 2000 ISDN Line Simulator is two ISDN BRI connections in a portable unit The user interface is either a U or an S T connection using an RJ45 modular plug The U connection is similar to the interface that is provided by a local telephone service provider LEC such as one of the Bell Operating Companies or an independent telephone company The S T connection uses a built in NT 1 Network Termination 1 to connect to Terminal Equipment that includes TE1s TAs and TE2s Using these connections the user is able to place calls either voice or data or both using the National ISDN 1 AT amp T 5ESS Custom DMS100 or ETSI ISDN is based upon an OSI Open System Interconnection model The ILS 2000 supports layer 1 physical operation layer 2 data link operation and Layer 3 network operation Layers 4 7 are considered application layers that use the first 3 layers as a base
6. Consequently any device that uses two B Channels for a single call such as a video conferencing application cannot connect to another device on the same line Another limitation occurs when attempting to place a call to a device that does not support the requested call type For example a call placed from an ISDN data terminal to an ISDN voice telephone will be rejected by the telephone In some cases the call type and number of channels are satisfied and the called device answers the call but the calling application is not compatible with the called application For example not all video conferencing applications use the same data encoding Or a Terminal Adaptor that converts ISDN to RS 232 may answer a data call that is carrying FAX information A well designed application determines that it cannot process the data and releases the call Otherwise the user must hang up What To Read Next For a technical review of ISDN BRI operation including physical layer indications data link packet protocol and call control signaling read Chapter 2 For a comprehensive review of Simulator provisioning read Chapter 3 For more details about Simulator operation read Chapter 4 For troubleshooting guidelines technical references read Chapter 5 6 40 400 00012 Rev E CHAPTER 2 ISDN Line Simulator User s Manual ISDN BRI Technology Overview The Integrated Services Digital Network Basic Rate Interface ISDN BRI is a techn
7. OFF If any other switch type is selected the Phantom Power selection will be ghosted and cannot be changed 15 ISDN Line Simulator User s Manual To change the Phantom Power setting follow these steps STEP 1 Run the Windows based configuration software STEP 2 Ensure the Switch Type is set to ETSI STEP 3 Change the Phantom Power setting to the desired state STEP 4 Select SAVE to save the configuration STEP 5 Remove all communications devices from the Simulator and press the DOWNLOAD button An automatic RESTART is issued as part of the DOWNLOAD Caller ID This service also referred to as Automatic Number Identification ANI or Calling Line Identification CLID allows Terminating Equipment with display support or call screening features to identify the calling party before accepting the call The ISDN switch knows each user s identity because a SPID or Directory Number is always associated with a specific line and user name When a user places a call the switch accesses its database to retrieve the calling number and includes it in the SETUP message sent to the called party If the called party supports a display the calling party s name and number may be formatted into ASCII text and sent as well When the Simulator s Caller ID setting is set to ON any calling device even when it doesn t include a Calling Party Number Information Element in its outgoing SETUP message is identified by the Simulator and presented to
8. Solution Solution Ensure that the physical interface is synchronized If fixed TEls values between1 63 are used ensure that a different value is used for each TE at both ports Note a TEI value of 0 is not supported If the TE permits use of dynamic TEls this option is strongly recommended Ensure that no more than 2 TE s are being initialized for either SAPI 0 or SAPI 16 at each port Problem The TE indicates that TEls are periodically Solution Solution Solution removed Ensure that duplicate fixed TEIs are not assigned to any device connected to the ILS 2000 TEI removal is normal whenever an interface first synchronizes Ensure that no more than 2 TEl s are being initialized for either SAPI 0 or SAPI 16 at each port Problem My CPE device requires a TID to operate Solution Example Program the device s SPID with the first 8 digits of the port s SPID and then use the last 2 digits of the port s SPID for the device s TID For a CPE device connected to port 1 which requires a TID to operate program the SPID as 08358661 and the TID as 01 Problem Caller ID doesn t work Solution Solution Solution Solution Ensure that the Caller Identification setting is enabled Ensure that the Directory Number is programmed into the TEI when required by the TE manufacturer If the TE has a caller presentation option which permits disabling Caller ID do not disable this option
9. 2000 ISDN Line Simulator 2 50 10 50 Front Panel THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS 1 THIS DEVICE MAY NOT CAUSE HARMFUL CEP INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION A CAUTION USE CORRECT VOLTAGE SETTING PWR ON Figure 4 Dimensions and Panels 230VAC Operation PWR OFF 115 230V 50 60 Hz 25 VA MAX A MODELNO ILS C XX 250 00XXX XX MFG DATE XXX WARR DATE XXXX PART NO BARCODE SERIAL NO Rear Panel NRTL 6 Teltone Corporation Bothell WA U S A Made MANUI LICENSE FROM Merge TECHNOLOGIES GROUP INC CAUTION C NTANS ELecTROSTATIC SENSITIVE DEVICES NO USER SERVICEABLE PARTS INSIDE RS 232 DCE The ILS 2000 is configured at the factory for 115VAC operation using a 300 mA fuse To enable 230VAC operation replace the 300 mA fuse and spare with a 150 mA fuse 2 provided and move the Voltage Setting switch to 230V A 230VAC power cord IS NOT provided with the unit Supported Call Control Messages The Simulator supports the ISDN BRI Call Control messages listed below For specification documents that describe the function of each message see the end of this section 40 400 00012 Rev E 25 ISDN Line Simulator User s Manual 26 Message codings unique to a particular switch vendor or protocol are followed by the applicable
10. E CHAPTER 3 ISDN Line Simulator User s Manual PROVISIONING AND OPERATION The instructions for many ISDN BRI communications devices may specify Provisioning required of the telephone company Provisioning is a means of configuring the ISDN switch so it knows what kind and how many calls communications devices can support up to the limits imposed by ISDN BRI technology Provisioning also specifies various Supplementary Services such as call appearances display support etc The Simulator provides the most common services supplied for the selected Switch Type Most communications devices should operate correctly with default provisioning which is retained in a Terminal Service Profile TSP The Simulator TSP has a fixed and a variable part The following fixed provisioning is established for all Switch Types B Channels 2 B1 Call Types CMV CMD All Bearer Services B2 Call Types CMV CMD All Bearer Services The variable part of the TSP may be changed using the Windows based software supplied with the ILS 2000 Not all variable settings are applicable for all Switch Types The settings are D Channel X 25 PHF None Permanent PVC Dial up SVC B Channel NONE Permanent B1 Permanent B2 Permanent Both Loopback Phantom Power ON OFF ETSI Caller IDentification ON OFF Terminal Display Text ON OFF Multi Point ON OFF EKTS ON OFF Call Appearances 1 15 0 OFF KEY HOLD OFF ON AUTO DROP ON AUTO HOLD ACO O
11. S T Interface which synchronizes in less than a second 40 400 00012 Rev E 3 ISDN Line Simulator User s Manual Step 12 Next you may be instructed to program one or more identification numbers into your communications device or computer application The numbers may be a Service Profile ID SPID and sometimes a telephone number Directory Number or DN The Simulator like an ISDN switch expects specific SPID s and DN s to be assigned to any particular port When programming these numbers into your communications device you must assign the number s listed in the following table First device at Port 1 Second device at Port 1 First device at Port 2 Second device at Port 2 SPID 0835866101 DN 835 8661 1 800 835 8661 SPID 0835866301 DN 835 8663 1 800 835 8663 SPID 0835866201 DN 835 8662 1 800 835 8662 SPID 0835866401 DN 835 8664 1 800 835 8664 NOTE Not all communications devices are programmed with a SPID or DN Some devices need an additional number called a Terminal Endpoint Identifier TEI If you must assign a TEI use a different number between 1 and 63 for each device you connect to the Simulator If automatic TEI assignment is a selectable option choose it In short follow the instructions for your device using the numbers listed above when applicable Step 13 After any identification numbers are programmed into your device it notifies the Simulator using an initialization procedure If t
12. S T interface requires two twisted pairs of wire 40 400 00012 Rev E ISDN Line Simulator User s Manual CCITT Consultative Committee on International Telephone amp Telegraph Comite Consultatif International Telegraphe et Telephone French for International Telephone and Telegraph Consultative Committee Formerly an international standards body charted by the United Nations Now called ITU T International Telecommunication Union Telecommunication sector Centrex Service created by software in the telephone company s local office which simulates multiple virtual PBXs Some telephone companies use their own marketing names for local marketing of this service i e ESSX Intellipath IIN Centro Plexar Channel Communication path which may be sending in one direction only simplex or both directions duplex and both directions simultaneously full duplex Most advanced networks today ISDN Frame Relay ATM etc are full duplex CMD Circuit Mode Data The connection of a fixed bandwidth circuit established from point A to point B through a network for the duration of a telephone call This connection supports end to end data CMV Circuit Mode Voice The connection of a fixed bandwidth circuit established from point A to point B through a network for the duration of a telephone call This connection supports end to end voice CPE Customer Premises Equipment In the U S end user equipment that may not b
13. The ILS 2000 ISDN Line Simulator has been developed to make the transition from traditional telephony to ISDN networking easier Software developers manufacturers integrators and sales representatives now have an ISDN BRI server in a box The ILS 2000 supports ISDN BRI end to end operation multiple Call Control protocols telephony switch services and simple functional operation on the desktop or lab bench Carefully unpack the items in the shipping container and verify that you have received the following 1 ILS 2000 ISDN Line Simulator 115 VAC Power Cord This User Manual Windows based ILS 2000 Configuration Software diskette Product Registration Card DB9F DB25M 6 ft RS 232 cable p n 742 00022 01 WO OU Be 20 EN DB9M DB25F adapter p n 742 00020 01 ISDN Line Simulator User s Manual CHAPTER 1 QUICK START The ILS 2000 Line Simulator is easier to operate than most communications devices designed for ISDN BRI applications It functions in the background providing two lines of end to end ISDN BRI service Because the Simulator was designed primarily for people who demonstrate functionally test or configure ISDN BRI devices you do not need to understand ISDN protocols or read the entire User s Manual to use it Simply follow the instructions outlined below to successfully simulate most ISDN BRI communications devices and computer applications Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7
14. User s Manual Mechanical Specifications Dimensions Weight Regulatory Compliance Safety United States Canada EMC United States 38 2 5 H x 10 0 D x 10 5 W 4 lb 15 oz UL 1459 CSA C22 2 No 225 M90 FCC Part 15 Class A 40 400 00012 Rev E GLOSSARY 40 400 00012 Rev E ISDN Line Simulator User s Manual 5ESS Medium to Large digital end office switch Class 5 Manufactured by AT amp T and introduced in 1981 First AT amp T switch to offer Basic Interface ISDN with the software load 5E4 2 in the 1980 s AMI Alternate Mark Inversion A Layer 1 line code scheme used in T1 carrier and ISDN PRI Zeros are expressed as no volts and ones are expressed as volts that alternate polarity AMI was also the foundation for proprietary Pre National ISDN BRI line codes for outside wire which were limited to distances of about 10 000 feet from the source of the signal ASI Alternate Space Inversion A Layer 1 line code specified by the ITU T for the BRI S T inside wire interface In ASI ones are represented by no volts and zeros are expressed as volts which alternate polarity The beginning and end of each frame is denoted by bipolar violations Each frame is 48 bits in length This type of line code is also known as pseudo ternary signaling Analog Signal Continuously varying with an amplitude which is an analog of the original information amplitude and thus may have virtually an infinite number of states Con
15. cabinet has been damaged or if the product exhibits a distinct change in performance refer servicing to qualified service personnel If the product is used in a manner other than specified in this manual the protection provided by the product may be impaired For the purpose of removing power from the product the power input connector is the main power disconnect point Pull the power cord away from the connector to ensure power disconnect Adequate air flow must be maintained in order for the product to operate correctly Do not wrap the product in blankets paper or other material that may impede ventilation CAUTION THIS PRODUCT CONTAINS ELECTROSTATIC SENSITIVE DEVICES USE APPROPRIATE HANDLING PROCEDURES 40 400 00012 Rev E REGULATORY COMPLIANCE FCC Part 15 Class A Notice This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense
16. calls and the D Channel is always used for transporting Call Control signaling packets between the ISDN switch in the central office and the end user communications device The B and D Channels may optionally transport user Packet Mode Data Layer 1 Physical Operation U Reference Point 40 400 00012 Rev E Typical ISDN BRI terminations and interfaces are shown in Chapter 5 Each interface which the telephone company terms a reference point is designed for a specific task This interface connects the central office to the customer s premises It is a 160Kbs two wire bidirectional transmission path that employs 2B1Q encoding to endure long distances It is designed to provide as much bandwidth as possible over existing copper wire pairs The U interface signal carries two B channels one D channel overhead bits for framing and echo cancellation and an Embedded Operations Channel EOC for testing and monitoring ISDN Line Simulator User s Manual Network Termination 1 NT 1 The U Interface terminates at a device called a Network Termination 1 or NT 1 This device converts the U Interface to an S T Interface It also permits loop back and testing by the telephone company and a means of routing local power to devices previously designed to receive power from the line such as a telephone S T Reference Point This interface is a 192 Kbs four wire path two wires are used for transmission two for reception The encoding s
17. connection NOTE Some terminals require that you send an X 25 RESET command manually before the terminal will establish a PVC connection B Channel Provisioning Phantom Power 40 400 00012 Rev E Some ISDN BRI communications devices usually LAN gateways and other Terminal Adapters do not use ISDN Call Control to establish calls or allocate B Channels These devices assume that one or more B Channels are permanently connected or nailed up to a fixed destination When using real ISDN BRI lines one or more permanently provisioned B Channels are assigned by the telephone company To establish one or more permanent channels between the Simulator s Port 1 and Port 2 or a LOOPBACK configuration STEP 1 Run the Windows based configuration software STEP 2 Select the B CHANNEL setting STEP 3 Change the setting from NONE Permanent B1 Permanent B2 Permanent BOTH or LOOPBACK STEP 4 Remove all communications devices from the Simulator and press the DOWNLOAD button An automatic RESTART is issued as part of the DOWNLOAD When B Channels are permanently allocated in this way they are not available to any devices that use ISDN Call Control to negotiate channel assignment You can exploit this fact to test how a device behaves when a line is provisioned for less than two B Channels When the ILS 2000 is configured for ETSI Switch Type you have the option of turning the Phantom Power Line Provisioning on the S interface ON or
18. exit the program without saving the configuration you will be prompted to do so To configure default provisioning based on the selected Switch Type STEP 1 Run the Windows based configuration software STEP 2 Select the SWITCH TYPE STEP 3 Select DEFAULTS STEP 4 Remove all communications devices from the Simulator and press the DOWNLOAD button An automatic RESTART is issued as part of the DOWNLOAD Important When the Simulator configuration is changed using the Windows based configuration software always reinitialize any connected devices The Simulator is configured at the factory for National ISDN 1 protocol To simulate the AT amp T 5ESS Custom ETSI or other future protocols you must change the Simulator s Switch Type Switch Type Emulation National ISDN 1 NI 1 AT amp T Custom AT amp T Custom DMS100 DMS Custom ETSI NET3 STEP 1 Run the Windows based configuration software STEP 2 Select the Switch Type STEP 3 Select DEFAULTS if you want the default settings for the selected switch STEP 3 Remove all communications devices from the Simulator and select the DOWNLOAD button An automatic RESTART is issued as part of the DOWNLOAD STEP 4 Reconnect all communications devices 13 ISDN Line Simulator User s Manual D Channel X 25 Important When the Simulator configuration is changed always reinitialize any connected devices All devices must be compatible with the selected switch protocol Packet Handling
19. frequencies as the call ISDN Address The full address of an ISDN capable device consisting of the site s ISDN numbering plan and any additional terminal specific digits signifying a particular user NT2 and TE1 40 400 00012 Rev E ISDN Line Simulator User s Manual ITU Internal Telecommunications Union The principal international standards organization chartered by the United Nations and supported by treaty agreements among member nations The ITU is the parent organization for the ITU T Formerly CCITT and the ITU R formerly CCIR In addition the ITU has two other permanent organs the International Frequency Registration Board IFRB and General Secretariat founded in 1865 LAPB Link Access Procedure Balanced Link Access Procedure B The Layer 2 protocol defined for X 25 LAPD Link Access Procedure D Layer 2 protocol defined in CCITT recommendations 1 440 441 442 cross referenced as Q 920 921 922 Reliably transfers blocks of information across a single Layer 1 link Unlike LAP and LAPB supports multiplexing or different connections at Layer 2 Layer 1 The Physical Layer in the OSI Reference model Includes transmission of signals and the activation and deactivation of physical connections Layer 2 The Data Link layer in the OSI Reference model Includes synchronization and some control over the influence of errors within the physical layer Layer 3 The Network layer in the OSI Reference model Includes ro
20. instructions for many ISDN BRI communications devices may specify Switch Provisioning required of the telephone company Provisioning is a means of configuring the ISDN switch so it knows what kind and how many calls your communications devices can handle up to the limits imposed by ISDN BRI technology Provisioning also specifies which types of 40 400 00012 Rev E ISDN Line Simulator User s Manual Supplementary Services your equipment may request such as call appearances display support etc Step8 After the Simulator s provisioning is established and downloaded the settings are retained in non volatile memory until you change them You now have two ISDN BRI telephone lines ready to provide Circuit Mode Voice Speech 3 1 kHz Audio 7 kHz Audio and or Circuit Mode Data 56 Kbs Restricted 64 Kbs Clear services on two B Channels Step 9 Refer to the instructions supplied by the manufacturer for installing your communications device or computer application on an ISDN BRI telephone line For most devices you will use a procedure similar to the following NOTE The instructions may specify that your communications device requires power from a secondary source such as a wall adapter It may not be necessary to connect a power source when using the Simulator See Specifications for more details Step 10 Determine which ISDN BRI interface is compatible with your device The interface may be either S T or U The S T Interface is co
21. practice to reinitialize the Simulator and any connected equipment before commencing the next test To reinitialize power down the Simulator and disconnect any connected devices Then power up the Simulator allow the unit to complete self testing then reconnect the terminal equipment to the simulator 23 ISDN Line Simulator User s Manual CHAPTER 5 REFERENCE Status Indications Figure 2 shows the ILS 2000 ISDN Line Simulator configured for U Interface operation Connecting to the U Interface allows synchronization of any communications devices connected downstream Port 1 Port 2 U Reference NT 1 S T Reference TA Figure 2 U Interface Operation The Simulator s U interface status is signaled by the U SYNC LED which changes from a blinking green LED to a solid green LED after synchronization is completed If your ISDN device needs an NT 1 the Simulator allows your device to use the S T Interface as shown in Figure 3 In this case TE 1 and TA devices are connected directly to the Simulator as if connecting to an NT 1 The U SYNCH LED does not function when a device is plugged into the S T port Port 1 Port 2 S T Reference S T Reference TE 1 TE 2 Figure 3 S T Interface Operation 24 40 400 00012 Rev E Dimensions and Panels ISDN Line Simulator User s Manual Figure 4 shows the unit s front and rear panels 10 00 ALELCONE E e L____ PORTA o STATUS 5 ILS
22. rely on tones sent on a B Channel from the switch Second they must be able to recognize B Channel selection during the connection phase of a call rather than the setup phase If the terminal supports these features then the switch notifies the terminal of every call even when both B Channels are busy a condition referred to as interface busy The terminal may then start its own alerting tone and if it supports CACH operation indicate the call visually If the user or a prioritizing system chooses to release a B Channel either by hanging up or putting a call on hold the terminal can accept the new incoming call by issuing a CONNect message The switch determines which B Channel was released and assigns it to the new call in a CONNect ACKnowledge message If your communications device does not support ACO or if you want to test the operation of a device during call blocking disable this setting STEP 1 Run the Windows based configuration software STEP 2 Select the ACO setting STEP 3 Change the setting STEP 4 Select SAVE to save the setting 40 400 00012 Rev E ISDN Line Simulator User s Manual STEP 5 Remove all communications devices from the Simulator and press the DOWNLOAD button An automatic RESTART is issued as part of the DOWNLOAD NOTE This setting is not available when EKTS is disabled 40 400 00012 Rev E 21 ISDN Line Simulator User s Manual CHAPTER 4 22 SIMULATOR OPERATION This section refer
23. tone multifrequency DTMF touchtone and digital packet technology ISDN SS7 SPID The Service Profile Identifier is used to identify a specific ISDN set when more than one ISDN set has been attached to the same central office line In most cases only one ISDN set will be assigned to a line and the SPID is not used by the switch 40 400 00012 Rev E 45 ISDN Line Simulator User s Manual 46 SS7 Signaling System Number 7 An international standard common channel signaling system SS7 is used between public network switches replacing per trunk signaling local exchange carrier switches interexchange carrier switches and increasingly between local and interexchange carrier networks Switch Generic term for machines that switch telephone calls from to telephones and or trunks Includes private branch exchanges PBX as well as other premises based systems and public network central office machines such as local exchange switches tandem switches toll switches interexchange carrier switches and gateway switches Synchronous Transmission Data communication protocol set where data is sent continuously The receiver and transmitter are in constant bit synchronization Character byte synchronization is achieved by a Layer 2 Flag character transmitted at the start of each block Synchronous transmission is normally found on the faster circuits e g rates of 4 8 Kb s and above T Interface ISDN Interface betwe
24. 2000 incorporated new hardware to support the Phantom Power requirements of the ETSI switch type Because of this an ILS 1000 cannot be upgraded to an ILS 2000 Initial Release ILS C 02 The ILS C 02 replaces the ILS C 01 Firmware Version 3 50 Bug Fix X 25 PVD D Channel changed from 0 to 1 Bug Fix Configuration software incorrectly identified the unit as an ILS 1000 Firmware Version 3 52 Bug Fix Q 931 Call Set up Failures 35 ISDN Line Simulator User s Manual WARRANTY AND SERVICE Warranty Information Teltone warrants this product to be free of defects in workmanship and materials for a period of 1 year Return Procedures If a unit is found to be defective contact Teltone customer service to obtain a RMA Return Material Authorization number and shipping instructions When returning units provide the following information e Unit model number unit part number and serial number obtained from the Unit ID label e Teltone RMA number e All available fault information e Complete shipping and billing address e Repair purchase order Technical Assistance For technical assistance on this product call Teltone technical support at 425 951 3390 or send an email to support teltone com Maintenance Cleaning The unit can be cleaned by using a damp cloth and wiping away any dust or residue on the metal Always disconnect power before cleaning the unit Servicing The unit should be checked periodic
25. America it consists of twenty four full duplex channels Twenty three 64 Kb s B Channels and one 64 Kb s D Channel hence the acronym 23B D The physical media is two twisted pairs of wire Q 931 1 451 Layer 3 protocol for out of band message oriented signaling across user to network interface Originally specified for the D channel of the ISDN Basic Interface BRI and Primary Rate Interface PRI Q 932 Q 931 signaling protocol extensions to add supplementary services These include custom calling features RBOC Regional Bell Operating Company Seven operating or holding companies into which the Bell System s local telephone companies were assigned as a result of the Modified Final Judgement MFJ in 1982 These companies were assigned the management of local exchange companies originally owned by AT amp T Distributed regionally they included Pacific Telesis U S West Southwestern Bell Telephone Bell South Bell Atlantic Ameritech and NYNEX Ring Back Also known as audible alerting The tones the calling party hears while the called party s phone is ringing RS 232C Collection of specifications defining electrical and mechanical interfaces between terminals computers and modems S Interface ISDN Interface between station equipment and NT2 Signaling Communication between switches or switches and end points to setup manage and tear down calls Signaling methods include dial pulse rotary dial dual
26. B Channel setting is set to None Ensure that the Status LED is constant on green Ensure that the correct SPIDs for each port are entered into the TE if applicable Ensure that the correct DNs for each port are entered into the TE if applicable When operating four TE 2 on each port a call from one TE to another on the same port uses both B channels at that interface To call one of these TEs from a TE at the other port ACO must be set to On Note not all TEs support ACO 31 ISDN Line Simulator User s Manual Configuration 32 Problem How do select Bearer Capability or call types Solution The following call types are permitted on both B channels at all times Speech 3 1 kHz audio 7 kHz audio 56 kbs restricted digital 64 kbs digital Problem TE continues to reinitialize in some cases the Message TEI Remove is observed Solution Ifthe TE initializes more than 1 TEI or if more than one TE are used the Multipoint AT amp T only setting must be must be set to Yes Solution If SPIDs are used a different SPID for each port must be programmed in the TE Solution If SPIDs are not used a different directory number for each port must be programmed in the TE Problem Cannot place X 25 call by dialing a number Solution Select SVC for D Channel X 25 setting Connect one TE to port 1 and the other to port 2 Ensure that both TEs send X 25 Reset packets to the ILS 2000 before attempting the call
27. D When set to ON the Simulator sends formatted display text to every device which includes the Call Appearance Called or Calling Party Name and Directory Number When the Simulator is configured for National ISDN 1 this text is sent in a Display Text Information Element following a Locking Shift 5 National Codeset Information Element For AT amp T devices the text is sent in multiple Display Field Information Elements which follow a Locking Shift 6 Network Codeset Information Element If one or more devices do not support display text but others do enable the Terminal Display Text The device s that cannot support these Information Elements simply ignore them NOTE The Simulator does not send display text if Caller Identification is disabled Electronic Key Telephone Service EKTS EKTS is not new and most people are familiar with the office telephones that employ it With a telephone and switch that support EKTS multiple Directory Numbers may share the same physical line The main protocol difference between standard ISDN devices or Basic Mode Terminals and EKTS Mode Terminals is that the former are addressed using the Called Party Number Information Element while the latter support the Endpoint ID Information Element The Called Party Number is simply the Directory Number associated with the physical telephone line when service was established When an incoming SETUP Message is received all telephones connected to t
28. Function PHF 14 ISDN BRI permits the use of the 16Kbs D Channel usually reserved for ISDN signaling to exchange X 25 LAP B user data with a host system While few applications for personal communications devices exploit this service it is available on some terminal adapters and integrated into some telephone sets X 25 packet data is offered as an ISDN BRI service because the telephone company configured their network with it before any protocol had become popular It seems unlikely that X 25 will become more popular now that it is available via ISDN BRI In fact most Terminal Adapters that transport packet data across ISDN BRI lines do so by sending their preferred packet protocol over a 64Kbs B Channel during a Circuit Mode Data call One severe limitation of using X 25 LAP B protocol on the D Channel is that it must share the bandwidth or available throughput rate with Call Control signaling packets and other X 25 traffic on a multi point line For this reason the telephone company does not assure X 25 LAP B data throughput exceeding 9600 baud There are three methods for establishing a D Channel X 25 Packet Mode Data PMD call The first but least used is to negotiate the call using ISDN BRI Call Control signaling The other two methods employ X 25 Virtual Circuit channel negotiation with the telephone company s Packet Handling Function PHF or host computer The second method referred to as Semi permanent Virtual Circ
29. In this example the Directory Number is dialed using the keypad User Port 1 Off Hook Dial Tone SETUR ACK INFO x 7 Digits Dialed CALL PROC Ring Tone ALERTING NN Tones Off eee ILS 2000 User Port 2 Switch SETUP ALERTing Sits p CONNect Off Hook User Traffic DISConnect RELease DISConnect On Hook RELease COMP The entire procedure for overlap send is not shown RELease COMP Figure 5 Call Control Message Exchange Example 40 400 00012 Rev E 27 ISDN Line Simulator User s Manual 28 When User 1 picks up the handset the terminal sends a SETUP message to the switch indicating the Off Hook condition Switchhook type of call Bearer Capability the desired channel Channel ID the selected Call Appearance and the Calling Party Number The Called Party Number is not included so the switch returns a SETUP ACKnowledge message indicating the assigned channel and in band tones applied Signal Dial Tone User 1 dials the number which is sent in seven consecutive INFOrmation messages overlap send Once the switch determines that a valid number has been requested it returns a CALL PROCeeding message which may include Display Text showing the name and requested number The switch broadcasts a corresponding SETUP message to the line associated with the dialed number selecting a B Channel if one is available Any terminals that match the requested Bearer Capability and optional
30. N OFF These settings are fully described in the following sections Configuration Software Installation 40 400 00012 Rev E The ILS 2000 configuration software is supplied on a 3 5 in diskette This diskette has a program that is installed and run under Windows 3 1 Windows for Workgroups 3 11 or Windows 95 To install this software place the diskette into a 3 5 in disk drive and from Program Manager select File Run x setup exe where x is the name of your 3 5 in disk drive During 11 ISDN Line Simulator User s Manual 12 Configuration Name uNTITLED l Switch Type National ISDN 1 E D Channel X 25 B Channel installation a message may appear saying that a certain file could not be installed because it is already installed and in use Continue with the installation until complete A Program Window will be created that is labeled ILS Configuration and includes an icon labeled ILS Configuration Double click on this icon to start the software see Figure 1 and provision the ILS 2000 ILS Configuration Pelete Switch Provisioning Query K Mei Pons x Caller Identification X Phantom Poee X Terminal Display Text X Electronic Key Telephone Service EKTS Call Appearances Key Hold x Additional Call Offering ACO Line Provisioning Download On Auto Hold o a National ISDN T deraut J Figure 1 Configuration Software The ILS 2000 Configuration softw
31. Place the Simulator on a flat surface near the ISDN equipment to be connected Insert the power cord into the three pronged outlet located at the rear of the Simulator Plug the other end into a standard 115 VAC 60 Hz wall outlet NOTE This unit is set at 115 VAC operation at the factory 230 VAC power may be used see Chapter 5 for details Connect the ILS 2000 to your computer s serial port using the supplied RS 232 cable and if needed the supplied DB 9M to DB 25F adapter A 3 5 diskette is provided with the ILS 2000 to change the configuration of the unit To install this windows based software place the diskette in the appropriate drive and from Windows Program Manager select FILE RUN A Setup Start the ILS Configuration Program Apply power to the Simulator by pressing the power switch located at the rear of the Simulator to the PWR ON position An internal self test will begin Please wait 60 seconds before attempting to place any ISDN calls This will give the ILS 2000 time to complete its self test The Simulator is configured at the factory for National ISDN 1 protocol The Simulator is provisioned for default service as normally practiced for the selected switch type Most communications devices operate correctly with this provisioning However if your communications device does not operate correctly you may need to change the Simulator s provisioning These settings are fully described in Chapter 3 NOTE The
32. ally for damage or hazardous conditions 36 40 400 00012 Rev E SPECIFICATIONS 40 400 00012 Rev E ISDN Line Simulator User s Manual AC Power Input Input Voltage Selectable via rear panel slide switch Frequency Current Connector Output to power external devices U Interface Protocol Maximum cable drop S T Interface Protocol Maximum cable drop Power Source 1 Power Source 2 115 10 VAC or 230 10 VAC 49 to 61 Hertz Fused 300 mA for 115 VAC Fused 150 mA for 230 VAC IEC 3 Prong Male 40 5 0 VDC 6 watts maximum RJ 45 8 pin modular connector 2B1Q 2 Binary 1 Quaternary 80 kbaud 5 ppm 1600 meters using 24 gauge copper wire RJ 45 8 pin modular connector Pseudoternary ASI Alternate Space Inversion 192 kbits sec 100 ppm 100 meters using 24 gauge copper wire 40 5 VDC on pins 4 8 5 negative reference 40 5 VDC on pins 3 amp 6 positive reference 40 5 VDC on pins 7 amp 8 Pin 7 negative reference Pin 8 positive reference Maximum power source voltage per ANSI T1 605 is 56 5 VDC Minimum power source voltage per ANSI T1 605 is 32 0 VDC Maximum of 6 Watts available power for external devices RS 232 interface Environmental Specifications Temperature Storage Operating Humidity Flammability DB 25 pin female connector DCE 19 2 Bps 40 to 55 C 0 to 50 C Max 85 Meets UL 94 V O 37 ISDN Line Simulator
33. ance numbers and assigns incoming Call Appearance numbers The Simulator manages a maximum of 15 Call Appearances per terminal which is the default setting To change the Call Appearance Call Handling setting STEP 1 Run the Windows based configuration software STEP 2 Select the Call Appearances setting STEP 3 Select the number of Call Appearances 00 15 STEP 4 Select SAVE to save the setting STEP 5 Remove all communications devices from the Simulator and press the DOWNLOAD button An automatic RESTART is issued as part of the DOWNLOAD Note This setting is not available when EKTS is disabled Note A maximum of 4 calls may be on hold with one connected When one or more Call Appearances are enabled the Calling Party Information Element is not included in incoming SETUP messages This means Basic Mode AT amp T Custom terminals must have Call Appearances set to 00 to operate correctly Electronic Key Telephone Service EKTS terminals may support Hold Drop Transfer and Conference HDTC features These feature apply to terminals that manage multiple voice calls Some of these operations are performed by the Simulator When a call is placed on hold the B Channel allocated to that call is released but not the call s status variables or other switch resources This means the B Channel may be used for another purpose and the original call can be quickly reconnected after the B Channel is released from its temporary task Cal
34. arch centers private service providers and user associations as well as Post and Telecommunications Administrations ETSI has more than 250 members Hertz Cycles Per Second A unit of frequency equal to one cycle per second and named for Heinrich Hertz a German mathematician 1 331 1 331 is the ITU T specification for the ISDN numbering plan This is also known as E 164 1 430 The ITU T Layer 1 specification for the ISDN BRI S T interface which consists of 4 wires The S T interface uses Alternate Space Inversion ASI line coding 1 431 The ITU T Layer specification for the Primary Rate Interface See PRI T 1 and E 1 1 440 The ITU T specification commonly know as Q 920 which describes the general network aspects of the LAP D protocol also known as DSS1 1 441 Q 921 ISDN user network interface D Channel Layer 2 specification describing the operational procedures of LAPD Part of DSS1 1 450 Also known as Q 930 the ITU T specifications describing the general network aspects of the ISDN D Channel Layer 3 protocol 1 451 Please refer to Q 931 1 452 The ITU T specifications for the 1988 specifications for the ISDN supplementary services Q 932 These services are now specified in Q 932 and Q 957 IEC Interexchange Carrier A long distance company such as AT amp T MCI Sprint or hundreds of smaller companies Inband Signaling Controls Signals that travel on the same circuit and uses the same
35. are will attempt to query the ILS 2000 via COM1 the default communications port If a serial cable is connected to COM1 and the ILS 2000 the loaded configuration will appear on the screen If an error message appears follow the instructions as required i e If the communications port is other than the default of COM1 select another port as necessary When a valid query has been completed the Configuration Name will appear as QUERY with Switch and Line Provisioning settings shown No attempt to compare against a stored value is done Two message boxes at the bottom of the screen will aid the user in provisioning of the ILS 2000 The lower left hand message box will display status messages at different times such as QUERY DOWNLOAD National ISDN 1 defaults and other messages The lower right hand message box provides short messages about the feature under the cursor such as Save User configuration when the cursor is over the Save button It also displays a time bar when downloading or querying 40 400 00012 Rev E General Operation Defaults Switch Type 40 400 00012 Rev E ISDN Line Simulator User s Manual Provisioning of features using the ILS 2000 configuration software allow the user to select from several stored configurations as well as allow the user to store other configurations as needed If a stored configuration is selected and any feature is changed the Configuration Name changes to Untitled If you attempt to
36. ave the setting STEP 5 Remove all communications devices from the Simulator and press the DOWNLOAD button An automatic RESTART is issued as part of the DOWNLOAD Note This setting is not available for NI 1 Switch Types which are always operated in multi point configuration The default configuration for the AT amp T Switch Type is NO When set to NO the Simulator does not screen outgoing SETUP messages for the Calling Party Number information element and incoming SETUP messages are sent point to point not broadcast Important Do not connect more than one device to each Simulator port when MULTI POINT is set to NO Another feature of many business telephones specifically EKTS Mode Terminals is the ability to manage multiple calls at one terminal The purpose of a Call Appearance is to give the user a method of selecting from one of several calls and offering an indication of each call s current status 40 400 00012 Rev E Key Hold 40 400 00012 Rev E ISDN Line Simulator User s Manual Some devices permit programming of the Directory Number s into the terminal and associate one or more Call Appearances to manage each DN The terminal indicates incoming calls using the received Called Party Number Information Element and lighting the first unused idle Call Appearance assigned to that DN However a simpler method uses the Call Appearance Information Element With this technique the switch manages outgoing Call Appear
37. cheme is ASI bipolar Unlike the U Interface it synchronizes quickly All ISDN compatible user devices or Type 1 Terminating Equipment TE 1 are connected directly to the S T interface Terminal Adapters To accommodate a variety of communications equipment the S T interface may be connected to a Terminal Adapter TA This device provides any necessary conversion from an older or proprietary interface such as RS 232 or a Local Area Network LAN protocol to an ISDN BRI S T Interface Devices that connect to a TA are called Type 2 Terminating Equipment TE 2 Layer 2 Data Link Operation Layer 2 of the OSI model establishes a method of transporting binary information via data links The ISDN data link layer is a variant of X 25 packet exchange called LAP D All signaling and switching information Layer 3 and optionally X 25 LAP B user data are transported on the D Channel using this protocol LAP D packets are of variable length and are bounded by a flag pattern and terminated with a cyclic redundancy checksum There are three categories of packet Unnumbered Information Ul packets carry LAP D protocol commands These commands establish addresses initiate sequenced packet exchanges or negotiate various protocol parameters Numbered Information I packets carry Layer 3 Call Control messages or X 25 LAP B user data These packets are given sequence numbers referred to as Next Send NS and Next Receive NR which ensure de
38. cspeniie uty 36 Retain Procedures a 36 a 36 Maintenance A O E 36 Cir A A A A EAE SKa iaia 36 SEVIN 2h ieii EN 36 A e a a Cece amet A N A 37 O O A mutase 39 40 400 00012 Rev E List of Figures Figure 1 Configuration Software ia iii 12 Fig re 2 U Interface OPIO aa 24 Figure 3 S T Interface Operation Ei 24 Figure 4 Dimensions and Pan i 25 Figure 5 Call Control Message Exchange Example ooooooccninconocccocccononconncconac nn 27 40 400 00012 Rev E IMPORTANT USER SAFETY INSTRUCTIONS When using this product basic safety precautions including the following should always be followed to reduce the risk of fire electric shock and injury to persons vi Read and understand all instructions Follow all warnings and instructions marked on the product The product should be operated only from the type of power source indicated on the marking label If you are not sure of the type of power supply consult your dealer or local power company The product is designed for indoor use only To reduce the risk of electric shock do not disassemble the product but take it to qualified service personnel when service or repair work is required Opening or removing covers may expose you to dangerous voltages or other risks Incorrect reassembly can cause electric shock when the appliance is subsequently used If the product does not operate normally by following the operating instructions or if the product has been dropped or the
39. dent Calls Bellcore TR TSY 000856 Additional Call Offering for Managing Multiple Independent Calls Bellcore TR TSY 000857 Flexible Calling for Managing Multiple Independent Calls Bellcore TR TSY 000858 ISDN Electronic Key Telephone Service Bellcore TR TSY 000205 AT amp T Integrated Services Digital Network ISDN Basic Rate Interface Specification AT amp T 801 802 100 ISDN Basic Rate User Network Interface Specification Northern Telecom NIS S208 6 Issue 1 1 Integrated Services Digital Network User network interface layer 3 Specifications for basic call control ETS 300 102 1 Issue 1993 10 ETSI Understanding ISDN Applications Telecommunications Research Associates Bellcore Information Exchange Management 445 South Street Room 2J 125 Morristown NJ 07960 6438 201 829 4785 AT amp T Information Network Architecture AT amp T Bell Laboratories Holmdel NJ 07733 40 400 00012 Rev E 33 ISDN Line Simulator User s Manual 34 Northern Telecom Inc 4001 East Chapel Hill Nelson Hwy P O Box 13010 Research Triangle Park NC 27709 800 684 2273 40 400 00012 Rev E ISDN Line Simulator User s Manual REVISION HISTORY 40 400 00012 Rev E ICS C 01 The ILS 2000 replaces the ILS 1000 ILS A 01 The ILS 2000 switch types include the AT amp T Custom switch type without requiring an upgrade package and also adds the DMS 100 Custom and ETSI switch types Firmware Version 3 42 NOTE The ILS
40. dium and which recovers the data from the received communication link This term is a contraction of MOdulator DEModulator Voiceband Modems are a special class of Modems which convert data signals into TONES within the bandwidth allocated for voice Direct Digital Interfaces are another class of modems which convert data into the format needed for transmission over digital radio channel MPEG Motion Picture Experts Group the emerging ISO standard for the compression and coding of motion video Also the name of the standards group developing the standard There are three versions of MPEG MPEG 1 operates up to about 2 5 Mb s and is suitable for storage on digital storage media e g hard disks CD ROMs etc MPEG 2 operates at higher bit rates for broadcast quality video MPEG 4 still underdevelopment will standardize video compression for video conferencing on analog phone calls N ISDN Narrowband ISDN Narrowband Integrated Services Digital Network Includes basic interface 2B D or BRI and primary rate interface 23B D or PRI Copper based at speeds at or below 1 5 Mb s NT1 Network Termination 1 In the U S a customer owned device that converts from external telephone company transmission format U interface to internal building transmission format T interface Concerned only with Layer 1 Should contain loopback and other maintenance capabilities to enable problems to be isolated to the telephone network or cust
41. e AT amp T 5E option series switch NOTE Layer 2 Disconnected Mode is supported only when initiated by Terminating Equipment Layer 1 deactivation and phantom power reverse polarity are not implemented All functions of a circuit switched call are performed which includes applying in band tones and completing B Channel connections D Channel X 25 Virtual Circuit packet mode calls are also supported Calls may be originated from either line called a Port and may terminate at either line Up to 5 end to end calls may be placed simultaneously A diagram illustrating a typical end to end ISDN BRI Call Control Message exchange is shown in Chapter 5 When Call Control Messages are sent to or returned by the Simulator the Message type is displayed under the applicable Port and Directory Number Some terminals send a Link Monitor Receiver Ready packet every 30 to 60 seconds to confirm the integrity of packet operation during periods of inactivity If simulation is halted when this occurs the terminal will attempt to restart the Simulator s link controller supporting that terminal When simulation is continued the Simulator successfully renegotiates data links with most terminals attempting to do the same and operation resumes normally 40 400 00012 Rev E Reinitialize 40 400 00012 Rev E ISDN Line Simulator User s Manual However some terminals are designed to report link failures to their Call Control Layer which may then at
42. e owned by the local exchange Carrier equipment that resides on the end user s side of the network interface boundary established by Computer Inquiry II D Channel An ISDN Statistically multiplexed user to network channel It carries Q 931 signaling messages to control the B channels and or X 25 packet switched user data It is defined as a 16 Kbp s channel in the Basic Interface and 64 Kbp s channel in the Primary Rate Interface dBm Decibel referencing 1 milliwatt A measure of power as a decibel reference to 1 milliwatt dBm is based on 600 ohms impedance and 1000 Hz frequency 0 dBm is 1 milliwatt at 1000 Hz terminated by 600 ohms impedance Digital The representation of data 0 and 1 bits via electrical pulses This form of transmission offers faster speed greater accuracy and flexibility than analog transmission Digital Information A stream of binary 0 s and 1 s bits Voice documents and even television can be samples quantized and converted to a digital bit stream DMS 100 NT large digital end office class 5 switch First commercially successful digital switch employed by telephone companies in the United States 40 400 00012 Rev E 41 ISDN Line Simulator User s Manual 42 ETSI European Telecommunications Standards Institute European Telecommunications Standards Institute Formed in 1988 by the member administrations of CEPT to broaden European Standards participation to include manufacturers rese
43. en station equipment and NT1 For the Basic Interface this is a 4 wire connection limited to 1 KM TA ISDN Terminal Adapter ISDN Customer owned protocol converter Converts from a standard non ISDN interface e g X 25 RS 232 to ISDN S T interface TE Terminal Equipment ISDN equipment category including TE1s TAs and TE2s TE1 Terminal Equipment type 1 Terminal Equipment meeting ISDN interface specifications such as ISDN phones ISDN terminals etc TE2 Terminal Equipment type 2 Terminal Equipment providing interfaces other than ISDN for example non ISDN equipment Needs an appropriate terminal adapter TA to connect to ISDN TEI Terminal Endpoint Identifier An ISDN device s Layer 2 address that is unique on a passive bus Used to establish independent data inks between the switch and each device on a passive bus Tip Ring The negative tip or ground and positive ring or battery wires of an analog lines Refers to an analog line rather than a digital line Twisted pair Twisted pair insulated copper wire is used extensively in the telco network to support analog grade communications such as the type of wiring generally supplied to serve a local loop for a home Twisted pair is normally 035 016 inches 22 26 AWG This type of facility is used by the telco to supply ISDN BRI to an individual or centrex subscriber 40 400 00012 Rev E 40 400 00012 Rev E ISDN Line Simulator User s Manual U Interface
44. hat line alert the user The user must then decide which device to use when accepting the call Using EKTS services one or more telephones may be addressed individually ISDN BRI terminals send a Service Profile ID SPID to the switch during initialization and the switch returns an Endpoint ID TEI 40 400 00012 Rev E 17 ISDN Line Simulator User s Manual Multi Point Call Appearances 18 Information Element unique to that terminal The EKTS terminal stores the TEI in its non volatile memory All subsequent SETUP messages sent to that line may then address all some or only one device using the TEI If the communications device does not store a TEI then the Simulator s EKTS setting should be disabled STEP 1 Run the Windows based configuration software STEP 2 Select the EKTS setting STEP 3 Change the setting STEP 4 Select SAVE to save the setting STEP 5 Remove all communications devices from the Simulator and press the DOWNLOAD button An automatic RESTART is issued as part of the DOWNLOAD Note EKTS is not available when Multi Point is disabled When the Simulator is configured for multi point operation each line can initialize and support more than one device using multiple SPID s However some devices will not operate on multi point lines To change this setting STEP 1 Run the Windows based configuration software STEP 2 Select the MULTI POINT setting STEP 3 Change the setting STEP 4 Select SAVE to s
45. he passing of Application Service Elements ASEs requests and responses between communicating entities ASCII American Standard Code for Information A standard governing the representation of various characters as a sequence of binary digits Primarily refers to text in personal computers 39 ISDN Line Simulator User s Manual 40 Asynchronous Transmission Data is sent character by character The receiver and transmitter are synchronized for each individual character via a start and stop pulse Asynchronous transmission is normally found on dial up circuits usually at speeds between 300 and 19 2000 bps B Channel A 64 Kb s DSO ISDN user to network channel Used in both the Basic Interface and the Primary Rate Interface Carries a voice data or image call but not the signaling for the call Normally circuit switched by the network but can be a switched or dedicated access to a packet switched network When circuit switched may carry multiplexed information streams but only to the same destination B ISDN Broadband ISDN This network standard from ITU T Formerly CCITT an ANSI T1 committees is an evolution of N ISDN to provide existing and new services for voice data and video in the same network at digital rates to 150 Mb s and 600 Mb s initially Eventually B ISDN could become one network for both circuit and packet using ATM to provide bandwidth on demand Bandwidth A measurement of transmission capacity the la
46. he procedure is successful and your device is connected to the U interface the U SYNC LED will light after synchronization is complete NOTE If the U SYNC LED does not turn on the device may need to be rebooted or momentarily disconnected powered down and reconnected to make it initialize If the device did not require SPID programming the U SYNC LED may not turn on until you place your first call Step 14 Repeat the above steps for additional devices The Simulator provides power for up to four communications devices and two NT 1 s Each communications device must be programmed with a different SPID and or DN Step 15 If you later need to rearrange the connections between the Simulator and your devices disconnect the devices from the Simulator Restart the unit by either repowering the unit or 40 400 00012 Rev E ISDN Line Simulator User s Manual using the configuration interface on a PC connected to the RS 232 port Then reconnect your devices If you move a device from one port to another its SPID and DN must be reprogrammed using available numbers from Table 1 You do not need to restart simulation if you change a device s SPID or DN when it remains at the same port IMPORTANT Some devices let you change the ISDN protocol to support the type of ISDN switch the telephone company has installed If you change your device s protocol you must change the Simulator s Switch Type configuration to match If you change an
47. l hold does not apply to the D Channel The Simulator supports both Auto Hold and Auto Drop treatment This refers to the action performed on an active call when a different call is selected With auto hold when one call is active and a different call is selected the first call is placed on hold With auto drop the first call is disconnected 19 ISDN Line Simulator User s Manual If your communications device does not support these services then the Simulator s HDTC setting may be disabled STEP 1 Run the Windows based configuration software STEP 2 Select the KEY HOLD setting STEP 3 Select DROP to enable HDTC services with auto drop treatment Select HOLD to enable HDTC services with auto hold treatment Select OFF to disable HDTC services STEP 4 Select SAVE to save the setting STEP 5 Remove all communications devices from the Simulator and press the DOWNLOAD button An automatic RESTART is issued as part of the DOWNLOAD Note This setting is not available when EKTS is disabled While the Simulator recognizes the CONFerence and TRANSfer call control messages it does not perform these services at this time The ILS 2000 returns a reject message as if the service was not subscribed Additional Call Offering ACO 20 The ISDN BRI equivalent to Call Waiting is Additional Call Offering or ACO Terminals that support ACO must be able to perform two functions first they must have the ability to generate tones rather than
48. livery in correct order Supervisory S packets acknowledge or reject sequenced packets Packet Addressing Each packet is given an address consisting of two numbers The first number called a Service Access Point Identifier or SAPI addresses one of three logical links or destinations within a device SAPI 0 addresses Call Control functions and SAPI 16 addresses the Packet Handling Function PHF associated with X 25 LAP B user data 8 40 400 00012 Rev E TEI Assignment ISDN Line Simulator User s Manual SAPI 63 addresses the Signaling Access Controller SAC which negotiates and assigns the second packet address number called a Terminal Endpoint Identifier or TEI The TEI is a unique number for each Terminating Equipment on a particular line For example if a packet addressed to SAPI 0 and TEI 3 is sent to four ISDN devices connected to a single line only the Call Control function SAPI 0 of the device assigned TEI 3 will acknowledge and process the packet Most ISDN Terminating Equipment support a feature called automatic TEI assignment After a device is connected and synchronized packets are exchanged with the switch to establish the TEI The switch knows which TEIs are assigned to that line and can query each device if in doubt A unique TEI between 64 and 126 is then formulated and returned to the requesting device TEI 127 the default broadcast TEI is used for this operation Some switches or devices do not support a
49. ly match the address contained in an Endpoint ID respond to the SETUP with an ALERTing message and begin ringing When the switch sends an idle Call Appearance to terminals that support the CACH option the incoming call is also indicated visually After the switch receives User 2 terminal s ALERTing message it sends a corresponding ALERTing message to User 1 with Signal Ring Tone When User 2 picks up the handset the terminal sends the switch a CONNect message indicating the selected channel The switch returns a CONNect ACKnowledge and completes a B Channel circuit between the switch and User 2 It then sends a CONNect message to User 1 and completes the B Channel circuit end to end User Application specific traffic may now be exchanged over the B Channel When User 2 replaces the handset the terminal sends a DISConnect message The switch removes the B Channel circuit and returns a RELease message It sends a corresponding DISConnect message to User 1 who returns a RELease message The switch sends RELease COMPlete to User 2 while User 1 sends RELease COmplete to the switch ending the call and releasing all allocated resources EXT Clock IN Connected from the EXT CLOCK OUT of another Teltone ISDN Simulator for bonding B channels OUT Connect to the EXT CLOCK IN of another Teltone ISDN Simulator for bonding B channels NOTE Contact Teltone for details regards bonding of B channels 40 400 00012 Rev E Troubleshoo
50. mmonly called the Phone outlet from an NT 1 and is used for most end user communications devices However some adapters and communications devices connect to the U Interface also called the Line outlet Use 8 Pin Modular RJ 45 telephone cord for all connections IMPORTANT Either or both Simulator ports may be used during simulation but only one interface S T or U may be selected at each port The Simulator auto detects the active interface If both interfaces at one port are connected the Simulator defaults to the S T interface If your communications device is compatible with the S T Interface connect to the Simulator s S T Interface at either port Some instructions may require that the device be connected to the Phone outlet of an Network Termination 1 NT 1 device If you do not have an NT 1 available use the Simulator s S T Interface Step 11 If you have an NT 1 and want to install it between your device and the Simulator connect the NT 1 Line outlet to the Simulator s U Interface at either port Allow several seconds 5 30 for the port s U SYNC light to turn green then connect your communications device to a Phone outlet on the NT 1 Most NT 1 s provide two Phone outlets providing a convenient method for connecting two devices at each Simulator port NOTE The Simulator s U SYNC light shows synchronization only for the U Interface The U SYNC light is not an indicator for the
51. nment 10 Normally each telephone line is assigned a single Directory Number When a customer orders services or features they are programmed into a Service Profile stored at the switch Any call associated with that line can be assumed to apply only to that customer s Directory Number and Service Profile When a single ISDN device is connected and serviced this way the configuration is said to be point to point However ISDN also supports point to multipoint configurations with multiple but dissimilar devices connected to a single line In many cases it is not desirable to share the same Directory Number and Service Profile Consequently ISDN relies on an initialization procedure for associating Service Profiles with individual Terminating Equipment rather than lines Terminating Equipment that support this procedure are said to be Auto Initializing The phone company gives an ISDN customer a Service Profile ID SPID up to twenty digits long The customer programs the number into the Terminating Equipment which sends it to the switch The switch associates the SPID with a specific Service Profile and Directory Number and returns a corresponding Endpoint ID to the Terminating Equipment When the switch sends SETUP Messages to a line configured point to multipoint it includes the Endpoint ID and only matching Terminating Equipment respond NOTE NI 1 Switch Types are always configured for multi point operation 40 400 00012 Rev
52. nonnconccconacnnn cono ccon nono nccnnos 11 Configuration Software InstallatiOM ooonnonnnninncnincoconnconnnonnnconncconocnnos 11 General Opera dad ca adios 13 A aceasta gute eta ata ot a AN Ta eA aes a 8a 13 SWEN LYDE Saroe aearacetete a a e A A cued a a a N 13 D Channel X25 ad as 14 Packet Handling Function PHP ooonccnnnconocccococoncnconnccononanoconccconocnnos 14 B Channel AAA A E A 15 Phantom A tata e edna teh een eta badd 15 Caller TD A A deh avant agents AAA eae tase 16 Terminal Display TeX da 16 Electronic Key Telephone Service EKTS ccccccsssccsscssccesrcesensenes 17 A tetaeas 18 Call Appearances a sii 18 Key Holdor three tine ct date Ahan ER E E EA 19 Additional Call Offering ACO td aid ia 20 Chapter 4 Simulator Operation nta nanan 22 REMATE ianari a einen gd ad eae a a a 23 Chapters Reference nure aeien iin a a a a a 24 Status Tndications a a a a eorias 24 Dimensions and PAS A Sa 23 Z30V AC Operan ltd 25 Supported Call Control MessageS oooooccnoccnonoconononnnonnncnnnnconncconccnnncnnnnoos 25 Typical Call Control Sequence oooooconcccnococonoconnnonnnconncconoconocono nono ncco nacion 27 FEUDO ne i E K R 29 Physical Interface nni neren A a Meee 29 TELAS Midi EAn 30 40 400 00012 Rev E iii Calo da cia 30 Contorno aci 32 Reference Documents da a a ta ees 33 FRG VISIOM A A EE EE odds ae 35 Warranty and Ser iron en E E E Gite e 36 Warranty Information ais ssictssdcseccasesdncctuantvaawiaarteaeie
53. numbers alert the called party connect the call across the network and disconnect the call and release its resources when either party hangs up Standardized Message types and Information Elements are listed in Chapter 5 Call Control is extensible however and the number of Messages and Information Elements continues to increase Multiple versions of ISDN Call Control currently exist Two common ISDN switches use proprietary Call Control Northern Telecom s DMS 100 series ISDN Line Simulator User s Manual and AT amp T s 5E series The Call Control standard to which these switches are being upgraded and to which current switches are designed is called National ISDN 1 The European Economic Community ECC is currently consolidating various national versions to comply with the European Telecommunications Standards Institute ETSI protocol Consequently Messages and Information Elements may differ in function and coding depending on the switch and the vintage A special Message NETwork ESCape is implemented to alert the switch when a proprietary Message coding is used Information Element codings that are not yet adopted by the ITU T are preceded by a Locking Shift Information Element Unfortunately these practices do not ensure that all switches recognize all devices Any Message that is not recognized by the switch is ignored For this reason not all ISDN equipment is compatible at all locations Service Profile ID SPID Assig
54. ology that gives individuals affordable access to the world s largest digital network using the copper wire currently entering their home or office With ISDN BRI users may connect almost any form of personal communications device to a single phone line and establish multiple simultaneous voice and data connections at speeds up to 128 thousand bits per second ISDN is an extremely robust networking technology based on the Open Systems Interconnection OSI model set forth in the International Standards Organization specification ISO84 The OSI model specifies a layered design architecture Layer 1 or the physical layer consists of two new interfaces referred to as the U and S T Interfaces Layer 2 or the data link layer is a packet transport protocol known as Link Access Protocol D Channel LAP D which was adapted from ITU T Recommendation X 25 Layer 3 or the network layer is a flexible switching and signaling language referred to as ISDN Call Control The ILS 2000 is configured to support the first three layers of the OSI model ISDN services are referred to as Call Types Common call types are Circuit Mode Voice CMV Circuit Mode Data CMD and Packet Mode Data PMD Circuit mode call types support high speed data and digitized voice while packet mode calls may be used for computer networking All ISDN BRI user traffic travels over two 64Kbs B Channels and one 16Kbs D Channel The B Channels are always used for circuit mode
55. omer s equipment NT1 for basic interface contains digital hybrid circuitry NT2 Network Termination 1 and 2 Customer premises device to fan out a user to network T interface into multiple T or R interfaces Concerned with Layer 1 2 and 3 Examples are a PBX Key system LAN and terminal controller OSI Open System Interconnection Reference Model Open Systems Interconnection The International Standards Organization ISO model of how data communications systems can be interconnected Communication is partitioned into seven functional layers Each layer uses and builds on the services provided by those below it Out of Band Signaling A system that uses a separate communications channel or frequencies outside of voice band for signaling Digital examples are the ISDN D channel and common channel signaling 40 400 00012 Rev E ISDN Line Simulator User s Manual Packet A grouping of data typically from 1 to 512 characters in size which usually represents one transaction A packet is always associated with an address header and control information The term Packet is usually used to refer to a Layer 3 data unit in X 25 PBX Private Branch eXchange A customer premises telephone switch connecting 20 or more station sets to each other to the public network and possibly to a private network PRI Primary Rate Interface An ISDN User to Network Interface In North America and Japan it is based on T1 Carrier In North
56. rger the bandwidth the larger the amount of information or transmission medium can carry Analog transmission is measured in Hertz or cycles per second Digital transmission is measured in bits per second Baud A unit of signaling speed equal to the number of signal events per second In binary systems one baud equals one bit per second In sophisticated systems one signal event may transmit more than one bit Baud or Baud Rate A unit of modulation rate equal to the number of signal events or Symbols per second A signal event is a change in an information bearing signal or waveform which represents some number of encoded bits Where two signal values are used as Symbols such as a combination of amplitude frequency or phase then each Symbol represents one bit and the Baud Rate will equal the Bit Rate Bearer Capability Information carrying capability requested by the user and provided by the network For example Bearer Capability of Voice with possible echo suppression and loss insertion is different than bearer capability of digital information where the bits are carried transparently Bit Binary Digit A binary character consisting of one of two possible values 0 or 1 BRI Basic Rate Interface An ISDN User to Network Interface consisting of three full duplex channels two 64 Kb s B Channels and one 16 Kb s D Channel 2B D The 2B D U interface requires a single twisted pair of wire while the 2B D
57. s to the operation of the ILS 2000 in more detail Many users of the Simulator will not need to read this section When power is first applied to the Simulator a self test is performed and the interfaces are initialized This takes about 60 seconds Each interface is continuously polled to determine if any devices are connected The U SYNC LED is displayed when the initialization of the U port is complete The S T initialization is done internally and its status is not shown by the U SYNC LED The Layer 2 Data Link Controllers are then reset to the TE Unassigned state and all data link variables are set to zero Finally the Layer 3 Call Control database is erased Simulator configurations are loaded and the Simulator waits for the arrival of signaling packets on the D Channel When the Simulator is processing D Channel packet traffic in this way the keypad s STATUS LED is illuminated a solid green which signals that the Simulator s ports now offer ISDN BRI services When simulation begins any terminals or communications devices connected to the Simulator must request TEl s and establish Multiple Frame operation before they can transfer Layer 3 Call Control packets to the Simulator The first Call Control Message sequence performed is usually the SPID initialization procedure for acquiring an Endpoint ID The Simulator performs ISDN BRI Call Control using all essential Messages and Information Elements defined for National ISDN 1and th
58. switch type identifier Not all recognized messages are performed by the Simulator and are indicated with For example while the Simulator will recognize the AT amp T CONFerence message it will return a CONFerence REJect message in reply using the appropriate Information Element Cause code to indicate the service is not available ALERTing CALL PROCeeding CONFerence AT amp T CONFerence REJect AT amp T CONNect CONNect ACKnowledge DISComnect DROP AT amp T DROP ACKnowledge AT amp T DROP REJect AT amp T HOLD NI 1 NTI HOLD AT amp T HOLD ACKnowledge NI 1 NTI HOLD ACKnowledge AT amp T HOLD REJect NI 1 NTI HOLD REJect AT amp T INFOrmation MANagement INFOrmation AT amp T NETwork ESCape NOTIFY NI 1 NTI PROGress RECONNect AT amp T RECONNect ACKnowledge AT amp T RECONNect REJect AT amp T REGISTER NI 1 NTI RELease 40 400 00012 Rev E RELease COMPlete RESTart RESTart ACKnowledge RETrieve NTI ISDN Line Simulator User s Manual RETrieve ACKnowledge NI 1 NTI RETrieve REJect NI 1 NTI SETUP SETUP ACKnowledge STATUS STATUS ENQuiry TRANSfer TRANSfer REJect Typical Call Control Sequence Figure 5 illustrates a common method for depicting a Call Control Layer 3 message exchange end to end for setting up and releasing a successful call The near end or originating caller is shown on the left while the far end or terminating caller is on the right
59. talk transfer files share computer applications video conference exchange e mail or perform any other service or feature your ISDN BRI devices or computer applications support If your device supports putting a call on hold or placing multiple calls you can make additional calls to other devices You can also make calls in either direction When you have completed the demonstration hang up all calls to release their resources ISDN BRI supports up to two connected voice and or data calls on one line using the B Channels More than two calls may be present but any call exceeding the limit of two connected calls must be placed on hold Some ISDN Line Simulator User s Manual devices particularly those that support video conferencing or LAN adaptation need both B Channels for a single call If your communications device requests any of these services the Simulator provides the necessary processing and resources A special case which uses the D Channel and X 25 packet data transmission is also supported and may occur while both B Channels are connected To enable this service see Chapter 3 section on D Channel X 25 Packet Handling Function Some limitations apply to all ISDN BRI communications however For example if two devices are connected to a single line and you establish a call between them both B Channels at that line are allocated to connect the call In other words both B Channels are busy during one connected call
60. tempt to recover If their recovery procedure is not satisfied before various timers expire they may clear or dump any active calls Some terminals do not attempt to recover from data link failures but simply terminate operation These devices must be momentarily disconnected from the Simulator then reconnected to initialize them Other terminals may have a reboot function hidden in an Administration menu If a terminal is operated when simulation is halted the device may store queue the Call Control packets in its memory until simulation is resumed and its link controllers have restarted All stored Call Control Messages are then sent in rapid succession to the Simulator Other terminals may respond to a Layer 3 failure by refusing to operate These too must be reinitialized or rebooted Note ISDN BRI devices are not normally designed to be stopped and started at Layer 2 or 3 Consequently not all terminals will operate in a predictable manner after simulation is resumed When in doubt press RESTART then reinitialize the devices Various test conditions and configurations can cause frequent line errors and low level protocol violations When using a real ISDN BRI line the Central Office accumulates these errors and discontinues service after a predetermined limit is exceeded The Simulator attempts to continue service even though there are errors After testing with a particular configuration known to cause errors it is good
61. the called party To change this setting and test the Caller ID features of a particular device STEP 1 Run the Windows based configuration software STEP 2 Select Caller Identification STEP 3 Change the setting STEP 4 Select SAVE to save the setting STEP 5 Remove all communications devices from the Simulator and press the DOWNLOAD button An automatic RESTART is issued as part of the DOWNLOAD Note When CALLER ID is set to OFF the Calling Party Number is not included in incoming SETUP messages Terminal Display Text Many ISDN BRI telephones terminal adapters and computer applications support a display feature that accepts and shows formatted ASCII text delivered by the network The text may indicate an invoked feature or explain 16 40 400 00012 Rev E ISDN Line Simulator User s Manual an error Usually the text indicates the name and Directory Number of the called or calling party If the Terminal uses Call Appearances the Call Appearance identifier is also displayed for the current call Some devices specify a switch provision indicating that the Display feature be enabled or disabled To change the setting STEP 1 Run the Windows based configuration software STEP 2 Select the Terminal Display Text setting STEP 3 Change the setting STEP 4 Select SAVE to save the setting STEP 5 Remove all communications devices from the Simulator and press the DOWNLOAD button An automatic RESTART is issued as part of the DOWNLOA
62. ting Physical Interface ISDN Line Simulator User s Manual Problem U SYNC LED does not light Solution Solution Solution Solution Solution The U SYNC LED is an indicator for the U interface only and will not light for the S T interface Ensure that the device is connected to the U interface and is 2B1Q encoded Ensure that the U interface is terminated into the NT side of an NT 1 or TE Ensure that the terminating device TE or NT 1 is receiving power Ensure that the loop length between the ILS 2000 and the terminating device is no longer than 1 600 meters Problem TE indicates no S T synchronization Solution Solution Solution Ensure that no more than 300 feet of loop is between the S T interface and the TE Ensure that an NT 1 is not installed between the TE and the ILS 2000 Ensure that any TE loopback tests are completed or disabled Problem How do loopback the S T interface Solution The S T interface acts like an NT 1 device loopbacks are performed using S and Q subchannel bits per ITU TRecommendation 1 430 Problem How do I loopback the U interface Solution 40 400 00012 Rev E Select Loopback as the B Channel setting Received B 1 and B 2 channel data is routed to the transmit B 1 and B 2 paths at each port 29 ISDN Line Simulator User s Manual TEI Assignment Call Control 30 Problem The TE cannot initialize TEI Solution Solution
63. trasted with a digital signal which has only a very limited number of discrete states Analog Transmission The transmission of a continuously variable signal Signals are sent through a system and where the signal strength weakens repeaters are installed to amplify the signal However since in an analog transmission there is no way to differentiate between the signal and noise repeaters amplify both and noise becomes cumulative in an analog transmission system ANI Automatic Number Identification The billing number of the calling party Provided by the originating switch to the interexchange carrier over equal access trunks FG D for billing ANI is also sold by IECs to their direct connect customers normally in conjunction with ISDN PRI ANSI American National Standards Institute A U S organization which is chartered to accredit standards developed by a wide variety of industry groups without undue influence from any one company ANSI does not itself develop any standards but accredits those developed by appropriate organizations For example ANSI accredits standards for telephone developed by ATIS Alliance for Telecommunications Industry Solutions under the auspices of Committee T1 standards for cellular radio developed by EIA TIA Electronic Association etc Application Layers Open Systems Interconnect OSI reference model top layer layer seven This end user layer sets up logical connections for t
64. uit or SVC employs a precursor to ISDN Call Control Specific X 25 packet formats are used to initiate calls confirm connections and clear calls when completed This method allows dial up for outgoing calls and notification of incoming calls based on a Directory Number The third method of X 25 call is Permanent Virtual Circuit or PVC This method does not employ any form of call control but simply establishes a constant virtual circuit between two fixed nodes whenever both nodes are active The ILS 2000 Line Simulator supports a single channel for a Semi Permanent or Permanent Virtual Circuit connection between Port 1 and Port 2 To demonstrate these services STEP 1 Run the Windows based configuration software STEP 2 Select the D Channel X 25 setting 40 400 00012 Rev E ISDN Line Simulator User s Manual STEP 3 Change the setting to SVC for dial up services or PVC for a permanent connection Select OFF if X 25 functions are not required STEP 4 Remove all communications devices from the Simulator and press the DOWNLOAD button An automatic RESTART is issued as part of the DOWNLOAD STEP 5 Connect a terminal that supports X 25 data on the D Channel to Port 1 and another to Port 2 When using PVC the terminals should automatically negotiate an open X 25 channel with the ILS 2000 s PHF simulator When using the SVC setting dial the Directory Number assigned to the X 25 terminal at the other port to establish the
65. uting and switching functions Layer 4 The Transport layer in the OSI Reference model Uses Layers 1 to 3 to provide an end to end service with the required characteristics for the higher layer functions Layer 5 The Session layer in the OSI Reference model Allows presentation entities to organize and synchronize their dialogue and to manage their data exchange Layer 6 The Presentation layer in the OSI Reference model Includes data formatting and code conversion Layer 7 The Application layer in the OSI Reference model Provides the means by which the user programs access the OSI environment and may contain part of these user programs LEC Local Exchange Carrier Local Exchange Company A telephone company affiliate of a Regional Bell Operating Company or an independent telephone company such as Southern New England Telephone SNET Cincinnati Bell GTE Contel United Centel Rochester Telephone Wamego Telephone or hundreds of others Line A communication path between a switch and one end user Analog lines are termed tip and ring and carry one telephone call ISDN lines are called Digital Subscriber Lines and can carry several calls 40 400 00012 Rev E 43 ISDN Line Simulator User s Manual 44 Loop Pair of wires connecting the subscriber to the Telephone Company central office Modem Modulator Demodulator A device which converts data signals into a form suitable for transmission over a communications me
66. utomatic assignment however The user is then responsible for configuring the device with a unique fixed TEI between 1 and 63 Layer 3 Network Operation 40 400 00012 Rev E Once packet exchange is established the Network Layers of the switch and Terminating Equipment can begin the Call Control dialog that replaces conventional telephony signaling The dialog is based on a set of commands that operate on one or more parameters similar to a computer Operating System language Commands are called Messages and parameters are called Information Elements IE There are over 45 Messages and 65 Information Elements currently used by North American ISDN telephone networks Information elements may contain between one and over 100 bytes of constant or variable data For example the SETUP Message initiates an incoming or outgoing call on demand Several Information Elements are contained in a SETUP Message and each are expected to be a particular value or variable type The SETUP Message usually contains the Channel ID Bearer Capability and Calling Party Number Information Elements among others The Channel ID determines which B or D Channel is used for the connection The Bearer Capability describes the call as voice high speed data or packet mode data and sets the data rate and other parameters The Calling Party Number is the caller s Directory Number in ASCII code Other Messages and Information Elements enable tones transport keypad
67. y one device s ISDN protocol then all devices connected to the Simulator must be configured for that protocol Step 16 Now you can operate your devices as recommended by the manufacturer ILS 2000 Operation 40 400 00012 Rev E In general your ISDN BRI device will operate the same as conventional telephone equipment with the obvious exceptions that call processing occurs more rapidly and that voice high speed data and packet mode data may be sent and received simultaneously To call from one device to another you must connect at least two devices to the Simulator To place a call from device 1 to device 2 dial either the local DN or long distance DN associated with device 2 For example to call from device 1 DN 835 8661 to device 2 dial the local Directory Number 835 8662 or the long distance number 1 800 835 8662 If you dial one of the valid Directory Numbers but no device was assigned to that number you will hear a ringing tone If you dial a number assigned to a device that is unable to accept the call you will hear busy tone and be disconnected after approximately 45 seconds If you dial a number that is invalid you will hear a reorder tone fast busy signal which means the Directory Number is not in service If you dial the number correctly and the device is able to accept the call the called device begins alerting rings When the call is answered a connection is established between the devices You may then

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