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DSU III DBU User Manual

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1. M 68 DBU Passc de tret ene rre rere rcr tne ire rna 68 Chapter 9 Dial Options Dial Opti P sg ecieeees 69 Answer Unit Connected to DDS Line ss 70 Dial Backup ie 70 Originate Unit Connected to DDS Line 70 Dial Backup rca 70 Stay On Leased reserare pan esie eei tbe teet eta 70 DBU Online Test cerent t e reete eren 70 Dial Options During Dial Backup 70 Lang Update ei 70 otay On Line ie oque teen pea im di e ana 70 Chapter 10 Status D ATUS E 71 Network Rate DTE Rate and Data Format esee 71 Dial Backup Information rre terere hee e pera 72 Type of Dial Backup Service iiem eene eer res 72 Current Status of Dial Backup Mode sss 72 DSU Operation and Network Status ss 74 Current DSU U DBU STAU S s s eror preter beet 74 Current DDS Network Status 74 DTE Control Leads and Status cerne ertet tenete trt 75 Chapter 11 Testing and Troubleshooting TJ St OVETVIW 77 Initan a Fest Re tite ie erit nee 78 Test Status Display errei aerea 79 Exitimpa test a ale aterert EEEE EEE 79 Troubleshooting aieo em iret rn aiar 81 Messages from the DSU SU scsi 81 iv DSU Ill DBU User Manual 61200 037L1 1 Table of Contents Troubleshooting New Installs ii 82 Test Sequence for Troubleshooting New Installs or Existing Circuits 83 Local
2. 2 NETW O RK ADDR 1 NETWORK OPT 1 DISA BLED 3 REMOTE CONFIG 2 ENABLED 4 CLOCK SOURCE 1 LOCAL 2 DTE OPTIONS 3 TEST OPTIONS 2 REMOTE ENTER ADDRESS 4 DIAL OPTIONS 5 MANUAL COMMAND 3 CONFIG Figure 5 3 Remote Configuration 36 DSU Ill DBU User Manual 61200 037L1 1 Chapter 5 Configuring N etwork O ptions Clock Source The Clock Source options specify the timing source for the DSU III DBU s internal circuitry The factory default setting is From Network see Figure 5 4 2 N ETW O RK ADDR 3 REMO TE CONFIG 1 NETWORK OPT 3 TEST OPTIONS 2 REMOTE ENTER ADDRESS 4 DIAL OPTIONS 5 MANUAL COMMAND 4 CLOCK SOURCE 2 FROM NETWORK Figure 5 4 Setting the Clock Source When operating on a DDS network the timing should be From Network On a point to point private network one DSU III DBU must be set for Master the others set for From Network 61200 037L1 1 DSU Ill DBU User Manual 37 Chapter 5 Configuring N etwork O ptions 38 DSU Ill DBU User Manual 61200 037L1 1 Chapter 6 Configuring DTE Options DTE OPTIONS The DTE Options menu is used to select the configuration parameters that control the operation of the DTE Interface of the DSU III DBU DTE Rate The DSU III DBU supports six DTE rates over a 56 kbps circuit with no secondary channel and seven DTE rates over a 64 kbps circuit If a DTE rate higher than the current lo
3. 1 L0 OP RATE 1 N ETW O RK OPT 2 N ETW ORK ADDR BEN TER NETWORK ADDRESS 00 3 REMOTE CONFIG 1 DISABLED 2 EN ABLED 2 CONN ECTOR TYPE O ptions vary according to loop rate 3 DATA FORMAT 1 ASYNC 9 BITS 4 CLOCK SOURCE 1 MASTER 2 FROM NETWORK 4 DTE CMD OPTION 1 ASYN CHRONOUS 2 SYN CHRONO US SYNC 10 BITS 1 DISABLED 2 AT COMMANDS SET SYNC 11 BITS 3 TEST OPTIONS 3 EIA LLB EN DIS 1 DISABLED 2 EN ABLED EN TER TIM EO UT 5 TRANSMIT CLOCK 1 NORMAL 1 TEST TIMEOUT 0 0 FF 00 SEC EXTERN AL 1 FORCED ON 2 FOLLOWS RS 1 CS DELAY SHORT 2 RDL EN DIS 1 RDL IG N O RED 6 CS OPTIONS 3 FOLLOW 5 CD 2 CS DELAY LONG 2 RDL ACCEPTED 7 AN TI STREAM 1 TIM ER OFF B CD OPTIONS 3 TIME 30 SEC 4 TIM E 60 SEC 4 FO LOWS RS CD 1 CS DELAY SHORT 2 CS DELAY LONG 4 EIA RLB EN DIS 1 DISA BLED 2 EN ABLED 9 TR OPTIONS 1 IG NO RED 2 COMMAND SWITCH ORCED ON ORMAL 1 FORCED ON 5 DBU AN S TEST 1 DISABLED 2 EN ABLED 2 REM O TE JEN TER ADDRESS 4 DIAL OPTIONS A SR OPTIONS 3 NO DBU IF OFF 2 0FF OOS ONLY 3 0FF LOCD ONLY B SECO N DARY RATE 4 0 FF TEST ONLY STO RED NUMBER TO COMMAN VALUE 00 5 MANUAL COMMAND cow M AND 00 Figure 4 3 Complete Configuration Menu 61200 037L1 1 DSU Ill DBU User Manual 31 1 P
4. 3 TEST OPTIONS 4 DIAL OPTIONS 1 DTE RATE 2 CONNECTOR TYPE 3 DATA FORMAT 1 DISABLED 4 DTE CMD OPTION 2 AT COMMAND SET 3 V 25 SYNC 4 V 25 BSC ASYNC 5 TRAN SMIT CLOCK 6 CS OPTIONS 7 AN TI STREAM 8 CD OPTIONS 9 TR OPTIONS A SR OPTIONS B SECO N DARY RATE Figure 6 4 Selecting DTE Command Option 44 DSU Ill DBU User Manual 61200 037L1 1 Chapter 6 Configuring DTE O ptions Transmit Clock The Transmit Clock option is used to select the source of the clock used to transfer data from the DTE into the DSU III DBU Figure 6 5 shows the menu path used to set the Transmit Clock option 1 N ETW ORK OPT 1 DTE RATE 2 CO NNECTOR TYPE 3 DATA FORMAT 4 DTE CMD OPTION 1 NORMAL 5 TRANSMIT CLOCK 2 EXTERN AL 2 DTE OPTIONS 1 LO CAL 2 REMOTE JENTER ADDRESS 6 CS OPTIONS 7 AN TI STREAM 8 CD OPTIONS 9 TR OPTIONS 3 TEST OPTIONS 4 DIAL O PTIONS B SEC O N DARY RATE Figure 6 5 Transmit Clock Options Table 6 C shows the AT commands used to set the Transmit Clock options Table 6 C Transmit Clock AT Commands Front AT 1 NORMAL amp X0 TX clock from DSU selected 2 EXTERN AL amp X1 ETC clock from DTE selected The External clock option is normally used in modem tail circuit applications A DSU to modem interconnect diagram for this application is shown in the appendix DSU to Modem Interconnect The External clock option is also recommended when the 61200
5. 1 Command Structure V 25 bis COMMAND CR LF Command Descriptions The ADTRAN V 25 bis command set is a subset of the CCITT V 25 bis command set In addition to the CCITT commands supported ADTRAN has added configuration commands for both local and remote DSUs The ADTRAN V 25 bis command set follows CNL Configuration local CNR Configuration remote Possible responses to V 25 bis commands follows VALA Valid V 25 command processed INV An invalid command detected INVCU Unknown command detected INVPS Invalid parameter syntax INVPV Invalid parameter value INVBL Invalid local password INVBM Invalid remote password If verbose responses are disabled ATVO the following three character responses are the only ones returned VAL Valid V 25 command processed INV Invalid command received DSU Ill DBU User Manual 61200 037L1 1 Chapter 2 Installation Syntax and Possible Responses CNL Configuration Local This command is used to pass AT commands to the local DSU via the V 25 bis command processor This allows the DSU III DBU to be configured with AT commands using a synchronous interface The format is as follows CNL LOCAL PASSWORD AT ONE OR MORE AT COMMANDS A local password may not be required depending on the present configuration of the unit Responses to CNL commands are returned in the data format currently configured Possible responses include VALA and INVAn CNR Configuration Remote This com
6. 4 wire full duplex Backup as applicable Receiver Sensitivity 45dB at all rates Environment Operating Temperature 0 C to 50 C 32 F to 122 F Storage Temperature 20 C to 70 C 4 F to 158 F Physical Relative Humidity Up to 95 non condensing Dimensions 2 25 H 8 75 W 10 25 D Weight 3 Ibs Power 115 VAC 60 Hz 8 W DSU Ill DBU User Manual 61200 037L1 1 Glossary 2047 A pseudorandom test pattern that is repeated every 2047 bits used to test DSU CSUs 511 A pseudorandom test pattern that is repeated every 511 bits used to test DSU CSUs 2 Wire Switched 56 A Northern Telecom proprietary 56 kbps switched digital data service offered by telco service providers and delivered to users over a single pair of copper wires 4 Wire Switched 56 An AT amp T proprietary 56 64 kbps switched digital data service offered by telco service providers and delivered to users over four copper wires AT amp T Publication 41458 An AT amp T specification titled Special Access Connections to the AT amp T Communications Network used to design compatibility into DSU CSU products AT amp T Publication 62310 An AT amp T specification titled Digital Data System Channel Interface Specification used to design compatibility in DSU CSU products BERT Bit error rate test A known pattern of bits is transmitted and the errors received are counted to figure the bit error rate The idea is to measure the quality of data
7. 61200 037114 DSU Ill DBU User Manual 119 Glossary transmission The bit error rate is the ratio of received bits that are in error relative to the number of bits received Usually expressed in a power of 10 CD Carrier Detect A signal generated by a modem or DSU CSU CD indicates its connection status If the CD light is on the device is speaking to another device channel service unit CSU A DCE device used to connect a digital phone line T1 or Switched 56 line coming in from the phone company to either a multiplexer a channel bank or directly to another device producing a digital signal for example a digital PBX a PC or data communications device A CSU performs certain line conditioning and equalization functions and responds to loopback commands sent from the central office A CSU regenerates digital signals It monitors them for problems and provides a way of testing the digital circuit clocking An oscillator generated signal that provides a timing reference for a transmission link A clock provides signals used in a transmission system to control the timing of certain functions The clock has two functions 1 to generate periodic signals for synchronization and 2 to provide a time base control port An interface to a device or system that allows users to issue commands pertaining to dialing configuration diagnostics management etc CPE Customer premise equipment All telecommunications terminal equipment loc
8. model is compatible with National ISDN and supports a U interface to the Basic Rate ISDN DSU Ill DBU User Manual 1 Chapter 1 Introduction Figure 1 1 shows a typical point to point application for the DSU III DBU BRIDG E ROUTER Lid Rr an Z E mr mt Local PAPE ieee k AAA IE E EAE IE E E IEE LE Newor T BRE TTT RECATA SmART 16 SHELF C PRIN TER 1 DA Ts i SERVER x Si s V 32 bis 20r 4 wire i 1 SW5 A M V DEDICATED PUBLIC SWITCHED ISDN PUBLIC SWITCHED PRIVATE NETWORK DIGITAL NETWORK NETWORK TELEPHONE NETWORK 1 x 2 or aire P PRIN TER LL Y 4 x 20 32 bis A i 20 Local Area E N etwork F EEE modo DSU Ill DBU BRIDG E ROUTERS sa Figure 1 1 Typical Point to Point Application for DSU III DBU 2 DSU Ill DBU User Manual 61200 037L1 1 Chapter 1 Introduction DDS OPERATION 61200 037L1 1 DDS is a nationwide service that allows interconnection and transport of data at speeds up to 64 kbps The local exchange carriers provide the local loop service to DDS customers and may provide data for routing Inter LATA to an interexchange carrier In DDS mode the DSU III DBU supports the 56 64 kbps DDS service rate yielding DTE rates of 2 4 4 8 9 6 19 2 38 4 sync or async 56 kbps and 64 kbps An additional rate of 57 6 is available in asynchronous mode The unit can be configured to run slower DTE rates async o
9. 1 DISABLED 2 EN ABLED 7 W HEN ALL 15 0s 1 DISABLE 2 EN ABLE 8 AUTO RESTO RE RESTO RE TIM ER 0 0 FF 1 MIN 9 REDIAL COUNTER EN TER RED COUNT 5 JA FAIL TIMER AUTO DBU FAIL TIM E 3X10 SEC B W AIT TO REDIAL WAIT TO REDIAL TIME 10 SEC 2 Wire amp 4 Wire Dial Backup C N ETW O RK TYPE 1 AT amp T M CI O THER 2 US SPRINT V 32 bis and V 34 Dial Backup 1 BUFFERED C ERROR CONTROL 1 DISABLED 6 REL V 42 MNP 2 XO N XO FF 7 AUTO V 42 MNP 3 CTS ONLY D FLOW CONTROL 4 RTS CTS 5 UNI XON XO FF 1 DISABLED E C 0 M PRESSION 2 EN ABLED ISDN Dial Backup 1 AT amp T 5ESS C SW ITCH TYPE 2 NT DMS 100 3 NATIONAL ISDN 1 1 EN ABLE DISABLE 2 EN TER CODE Figure 8 1 Dial Backup Options DSU Ill DBU User Manual 61200 037L1 1 Chapter 8 Configuring Dial O ptions Phone Number The DSU III DBU stores up to ten numbers of 36 digits each Edit a phone number by reentering the entire number This process overwrites the previously stored number Figure 8 2 shows the menu path used to access the Phone Number option 1 N ETW O RK TYPE 2 DTE OPTIONS 1 LO CAL 3 TEST OPTIONS 2 REMOTE JENTER ADDRESS 4 DIAL OPTIONS STORED NUMBER TO EDIT 1 10 NNNNNNN 1 PHONE NUMBER EDIT SPID 2 DBU OPTIONS STO RED NUMBER 9 NUM BER INNNNNNN 3 DBU PASSCODE EDIT LOC STO RED NUMBER 10 DIRECTO RY NUM INNNNNNN Figure 8 2 Editing Stored Phone Numbers ISDN Dial Backup Table 8 A shows the AT Commands available fo
10. 32 bis 42 bis modem in an asynchronous mode can use V 42 bis data compression to make up for a slower connection rate V 42 bis increases the effective data throughput from 14 4 kbps to as high as 57 6 kbps depending on the data type No compression is supported in synchronous operation In synchro nous applications the maximum speed supported for backup is 14 4 kbps 4 DSU Ill DBU User Manual 61200 037L1 1 Chapter 1 Introduction V 34 Backup Option The V 34 modem has all of the V 32 bis modem s modes of operation plus V 34 and V FC modes This allows the V 34 option to run synchronous rates up to 28 8 kbps as opposed to the V 32 at 14 4 kbps In asynchronous mode the throughput at 57 6 kbps is less dependent on data types 1B D Basic Rate ISDN Backup Option 1B D Basic Rate ISDN service provides the customer with a switched 56 64 kbps circuit The default data rate for this option is 56K The 64 kbps data rate may be revised by using the SMART dial string as described in the section ISDN Dial Backup in the chapter Configuring Dial Options This option provides a U interface to the ISDN network Entering Dial Backup Mode When a condition for entering dial backup mode is detected the Alarm LED turns on and the buzzer sounds The buzzer alternates between 30 seconds on and 30 seconds off unless the DDS line is restored or it is disabled by using the Quick key and selecting Turn Off Beep See the section Front Panel in the chapter
11. 511 PATTERN _T1 amp T8 Standard 511 random data pattern Stress pattern with alternating high and low ones densities Repeated 3 STRESS PTRN 1 T2 amp T8 pattern of 100 octets 1111 1111 followed by 100 octets 0000 0000 Stress pattern with alternating medium and low ones densities 4 STRESS PTRN 2 T3 amp T8 Repeated pattern of 100 octets 0111 1110 followed by 100 octets 0000 0000 Stress pattern with medium ones 5 STRESS PTRN 3 _T4 amp T8 density Continuous series of octets 0011 0010 Stress pattern with low ones 6 STRESS PTRN 4 _T5 amp T8 density Continuous series of octets 0100 0000 61200 037L1 1 DSU Ill DBU User Manual 85 Chapter 11 Testing and Troubleshooting DTE amp Loop LL Test Description The DTE amp Loop test splits the DSU III DBU into two separate DTE and loop interface sections and then loops the receive data of each interface back to its respective transmit data The DTE amp Loop test provides a bidirectional loopback at the DSU CSU Figure 11 5 illustrates the loopback points and the signal paths for this test LOCAL DTE DSU CSU x mam DTE Loopback Local 4 wire Loopback Figure 11 5 DTE amp Loop Test Test Purpose The DTE amp Loop test is used for the following purposes Verify integrity of the DTE interface and cable Provide a loopback for network tests 86 DSU Ill DBU User Manual 61200 037L1 1 Chapter 11 Testing and Troubleshooting
12. DBU Options for V 32 bis and V 34 Table 8 C shows the equivalent AT commands for setting Error Control Flow Control and Compression options Error Control This option determines the type of error control to be negotiated at the start of a V 32 bis or V 34 modem connection The factory default setting is AUTO V 42 MNP Flow Control This option is used to select the type of flow control used by the V 32 bis or V 34 modem The factory default setting is CTS Only Compression This option is used to select V 42 bis data compression for V 32 bis or V 34 operation when running asynchronously When enabled data throughput speeds as high as 57 6 kbps may be achieved For synchronous applications the speed is limited to a maximum of 14 4 kbps for the V 32 and 28 8 kbps for the V 34 The factory default setting is Enabled 66 DSU Ill DBU User Manual 61200 037L1 1 Chapter 8 Configuring Dial O ptions Table 8 C DBU Options AT Commands for V 32 bis and V 34 Backup AT n Error Control 1 Buffered NO N ormal operation No error control Allows speed matching buffering and flow control p TER N o error control no buffer and no flow 3 Reliable MN P Reliable MNP operation Uses MNP error control 4 Auto MNP N3 Auto Reliable MNP operation Tries MNP error control first uses normal operation if necessary Reliable V 42 LAPM operation Uses V 42 LAPM error 5 Reliable V 42 N4 control If V 42 LAPM error control cannot b
13. III DBU from entering dial backup during noncritical times such as nights and weekends For more information see the chapter Configuring Dial Backup Options Conditions for Returning to the DDS Circuit The DSU III DBU can be configured to automatically revert to the DDS circuit from the dial backup mode or wait to be re turned to the DDS manually Once the DSU III DBU enters dial backup mode the unit polls the DDS circuit once every 100 ms to determine if the condition causing the DDS circuit failure has been corrected Once the DSU III DBU determines that the problem has been properly corrected and the DDS circuit is stable it will wait for the amount of time specified in the restore timer 1 255 minutes before reverting to the DDS circuit Polling of the DDS circuit is non intrusive and return to the DDS 6 DSU Ill DBU User Manual 61200 037L1 1 Chapter 1 Introduction circuit generally takes 2 3 seconds The backup connection is maintained for one minute after the DDS circuit is restored For more information see the chapter Configuring Dial Backup Options WARRANTY AND CUSTOMER SERVICE 61200 037L1 1 ADTRAN will replace or repair this product within five years from the date of shipment if it does not meet its published specifications or fails while in service For detailed warranty repair and return information refer to the ADTRAN Equipment Warranty and Repair and Return Policy Procedure Return Material Authorizat
14. III DBU has two eight position modular jacks labelled LINE 1 and LINE 2 The line 1 connector is used for connecting to the dedicated DDS network The pinout for the line 1 connector is listed in Table 2 A Table 2 A Pin Assignments for Line 1 Connector Pin Name Description Transmit Data from DSU to N etwork Tip 1 36 _ 8 R N ot Used Receive Data from N etwork to DSU Tip Receive Data from N etwork to DSU Ring The line 2 connector is used for connection to the switched backup network The pinout for the line 2 connector depends on the model of DBU unit Pinouts for 4 wire Switched 56 2 wire Switched 56 V 32 bis V 34 and 1B D ISDN DBU options are shown in Table 2 B DSU Ill DBU User Manual 61200 037L1 1 Chapter 2 Installation Table 2 B Pin Assignments for Line 2 Connector Pin Name Description 36 jNotUed i y 8 R Receive Data from Network to DSU Ring 2 wire Switched 56 V 32 bis V 34 and 1B D ISDN 13 NotUsed 4 T jNewokTp Cd 5 R jNework ng CC 6 8 jNotUsd DTE DATA CONNECTION PRIMARY DTE vir CAUTION 61200 037L1 1 The primary DTE should be connected to either the EIA 232 DTE connector or the CCITT V 35 DTE connector The maximum cable lengths recommended are 50 feet for the ELA 232 and 100 feet for the CCITT V 35 The pin assignments for the connectors are listed in Tables 2 C and 2 D The V 35 c
15. Ill DBU User Manual 61200 037L1 1 Data Format Chapter 6 Configuring DTE O ptions The Data Format option is used to select either the synchronous or asynchronous mode of operation for the DTE interface The factory default setting is Synchronous see Figure 6 3 If asyn chronous is chosen the length of the data bytes must be selected 1 N ETW ORK OPT 2 DTE OPTIONS 1 ASYNC 9 BITS 1 LOCAL 3 CONFIG 2 REMOTE ENTER ADDRESS 3 DATA FORMAT 1 ASYN CHRONOUS ASYNC 10 BITS B ASYNC 11 BITS 2 SYNCHRONOUS 4 DTE CMD OPTION 61200 037L1 1 3 TEST OPTIONS 4 DIAL OPTIONS Figure 6 3 Selecting Asynchronous or Synchronous Data Format Table 6 B shows the AT commands that can be used to set the Data Format to asynchronous or synchronous Table 6 B Data Format Commands Front AT Front Panel Command Panel 1 ASYN CHRONOUS amp Q 0 1 ASYN CHRONOUS 2 SYNCHRONOUS amp Q2 2 SYNCHRONOUS For asynchronous options select the length of the data bytes 1 ASYNC 9 BITS N A 1 ASYNC 9 BITS 2 ASYNC 10 BITS N A 2 ASYNC 10 BITS 3 ASYNC 11 BITS N A 3 ASYNC 11 BITS DSU Ill DBU User Manual 43 Chapter 6 Configuring DTE O ptions DTE Command Option The DTE Command option is used to enable AT commands from the DTE enable V 25 bis SDLC commands enable V 25 Bisync and Async or disable all DTE command modes see Figure 6 4 1 LOCAL 3 CONFIG 2 REMOTE ENTER ADDRESS 1 N ETW ORK OPT 2 DTE OPTIONS
16. Initiating Follow the menu path outlined in Figure 11 6 to initiate a DTE amp Loop Test 1 DTE amp LOOP LL 2210 OP ONLY RT 1 LOCAL UNIT 2 REMO TE UNIT 3 DBU CONNECTION Figure 11 6 Initiating a DTE amp Loop Test Interpreting Test Results A BERT tester must be used to interpret the test results of a DTE amp Loop test 61200 037L1 1 DSU Ill DBU User Manual 87 Chapter 11 Testing and Troubleshooting Loop Only RT The Loop Only RT test allows the loop interface and a major portion of the DTE interface for the local DSU III DBU to be tested from the remote site over the actual communication circuit Figure 11 7 illustrates the loopback point and the signal paths for this test LOCAL DSU CSU Interface Local 4 wire Loopback Figure 11 7 Loop Only Test Test Purpose The Loop Only test is used to provide a loopback for network tests Initiating Follow the menu path outlined in Figure 11 8 to initiate a Loop Only test 88 DSU Ill DBU User Manual 61200 037L1 1 Chapter 11 Testing and Troubleshooting 1 DTE amp LO O P LL 2 LOOP ONLY RT 3 DTE ONLY 4 DTE WITH TP 5 TEST PATTERN 6 SELF TEST 1 LOCAL UNIT 2 REM OTE UNIT 3 DBU CONNECTION Figure 11 8 Initiating a Loop Only Test Interpreting Test Results The Loop Only test is used for the purpose of looping the DDS circuit back to the telco No test results are available from the local DSU III
17. Navigation ss 22 Front Panel 23 LED Window a lana 24 inj 24 Numeric Keypad ssss ss nete emi prer tiene Pene al tenet 24 Shift criceti een 24 QULCK PE tn 25 acie 25 Up and Down Arrows iii en een reper haine dps etate 25 LED DDesctiptiOD cranica isa 25 R atPanel 26 Chapter 4 Configuration Overview Local and Remote Configuration ss 29 Chapter 5 Configuring Network Options Network Options iaia reina 33 Loop Rate eus yee ariei ea EE EE ia aaa rana 35 Network Addres Sepenga EE EE EEEE 36 Remote Configuration sam eenn are E ante 36 Sl esig 37 ii DSU Ill DBU User Manual 61200 037L1 1 Table of Contents Chapter 6 Configuring DTE Options DIE ODLBOLS teorie entier aem nec nni 39 DTE Rateale 39 Connector FVpe P M 42 Ibrir se anri 43 DTE Command Optomni rca 44 Transmit Clock 45 Clear to Send CS Options 46 Anti Stream 5ieanesinaisceimetanitietaim eee are a rn eer n eer dO Ee ele neges 48 CID OPHoOns M M 49 Data Terminal Ready TR Options nus 50 Data Set Ready SR Options sn 51 Secondary Kate oet neentenie guid teinte tator i ede rete 52 Chapter 7 Configuring Test Options JH KO uM 55 Test MEOW ieira e areae ee E e benda en iii 56 Remo
18. Operation for more information on the Quick key Operation During Critical Times 61200 037L1 1 The following four conditions will cause a DSU III DBU to enter dial backup mode Loss of Sealing Current Sealing current is a low voltage DC current provided by the central office CO to prevent corrosion over the copper wires used in the local loop Sealing current may also be used for local loop testing purposes An absence of sealing current generally is an indication that the loop is open DSU Ill DBU User Manual 5 Chapter 1 Introduction Out of Service OOS Signal An OOS signal generated by the network indicates a device or devices in the network is out of service No Receive Signal This is an indication that the local loop copper pairs may be either open or shorted or the OCU in the CO is inoperative In a private network this may indicate that the transmitter of the remote DSU is inoperative All 1s or all Os Condition This condition is usually generated by the network to indicate some device or devices in the network is inoperative Upon detecting an all 1s or all Os condition the DSU III DBU initiates a handshake routine to determine whether the remote unit s DTE is the source of the all 1s or 0s condition or if an actual network failure exists Operation During Noncritical Times The DSU III DBU may be configured not to enter dial backup mode if data terminal ready DTR is low This feature prevents the DSU
19. Parameters 2 DTE Options DTE Interface Parameters 3 Test Options Unit Test Options 4 Dial Options Unit Dialing Options 5 Manual Command ADTRAN Specific Commands The DSU III DBU contains four different user profiles sets of configuration options stored in read only memory see the appendix Default Configuration Profiles The unit is shipped from the factory with profile number 1 default configuration loaded into the current nonvolatile configuration memory If profile 1 matches requirements for the system then no additional con figuration is required to put the unit into service If profile 1 does not match system requirements it can be modified or one DSU Ill DBU User Manual 29 Chapter 4 Configuration O verview 30 of the other profiles that more closely matches the system requirements can be loaded into current memory When a different profile is loaded or the existing profile is modified it is stored in the current nonvolatile configuration memory The DSU III DBU is then configured with that profile every time power is turned on or until the unit is reset For detailed information on configuration see the chapters Configuring Network Options Configuring DTE Options Configur ing Test Options Configuring Dial Backup Options and Manual Command A complete Configuration menu is shown in Figure 4 1 DSU Ill DBU User Manual 61200 037L1 1 Chapter 4 Configuration O verview 1 NO SEC CH 2 SEC CHANNEL
20. Sale Support Please contact your local distributor first If your local distribu tor cannot help please contact ADTRAN Technical Support and have the unit serial number available Technical Support 888 4ADTRAN Repair and Return If ADTRAN Technical Support determines that a repair is needed Technical Support will coordinate with the Return Material Authorization RMA department to issue an RMA number For information regarding equipment currently in house or possible fees associated with repair contact RMA directly at the following number RMA Department 205 963 8722 Identify the RMA number clearly on the package below ad dress and return to the following address ADTRAN Inc RMA Department 901 Explorer Boulevard Huntsville Alabama 35806 RMA
21. Table of Contents Table 2 D Pin Assignments for Primary V 35 Connector ui 13 Table 2 E Pin Assignments for Auxiliary ELA 232 Connector 14 Table 5 A Network Options AT Commands ss 34 Table 6 A DTE Rate Options AT Commands ii 41 Table 6 B Data Format Commands iii 43 Table 6 C Transmit Clock AT Commands ss 45 Table 6 D CS Options AT Commands ss 47 Table 6 E Short and Long Delays at Different Operating Speeds 47 Table 6 F Anti Stream AT Commands iii 49 Table 6 G CD Options AT Commands ss 50 Table 6 H TR Options AT Commands ss 51 Table 6 1 SR Options AT Commands ss 52 Table 6 J Secondary Rate AT Commands sse 53 Table 7 A Test Options AT Commands iiii ii 55 Table 8 A AT Commands for Storing Phone Numbers sss 62 Table 8 B DBU Options AT Commands for All Models sss 65 Table 8 C DBU Options AT Commands for V 32 bis and V 34 Backup 67 Table 11 A Messages from the DSU CSU sse eee eene 81 Table 11 B Troubleshooting New Installs sse 82 Table 11C Test AT Commands serere tee rtm erento 84 Table 11 D DTE with Test Pattern Commands sss 85 Table 11 E Remote Tests and AT Commands iii 97 Table 12 A Manual Commands iicieo nee edendi nee erede dean 103 T
22. Unit Diagnostics sre EE E R T dren Gramineae s 84 DTE amp Loop LL criniera 86 Test IDeSCELDUORD inni r esci eere oneri 86 Test PUtpose iaia 86 AE aaa ma e Gi edt iia nai 87 Interpreting Test Results sisirain eet dirai 87 Loop Only SE aient cx ceeds meten tende be dr races rrt eti HR berti te ety 88 JTESstRurpose noi 88 Initiatmis seine aaa 88 Interpreting Test Results aria Rent intenta es in 89 DTE ODIY E 90 Test PUL DOS ccrte beet EEEE EE EEE EREE EEEE 90 Inrtratitg x eet eden E E omite la 90 Interpreting Test Results ete ree tetris 91 DTE With Test Pattern teen eom E ER edet 92 Test Purpose noi 92 Insttaling ansie dt eere ene o egt 92 Interpreting Test Results iii iii 93 JTestPattem ssssas rai 94 Test PutpOSe c rote ertt bt eer endesa 94 MNANE nia mado eaa e Gi dett adiac nee 95 Interpreting Test Results erret ene entes 95 Self Test eese edema ete ne bn dr ae 96 FestPurpose eis 96 Italie iraniane alia 96 Interpreting Test Resulls 1 ria 96 Remote Unit Diagnostics ss 97 FestPurpose arena 97 D ARMES AN en timet a nane aa 98 Test RESUMS M 98 Interpreting Test Results iii 98 DBU Connectioni race alan aan 99 Test Putpose 4 oet ome iere maeror ae ira 99 Initiamio a leale 100 Interpreting Test Results er e emm nata 100 Chapter 12 Manual Command Manual omman attente aate dte ted eei eee 101 61200 037L1 1 DSU Ill DBU User M
23. as RS state 3 FOLLOWS CD CS state same as CD state 4 FO LLOWS RS CD CS state same as RS and CD state For Follows RS options select the length of the delay 1 CS DELAY SHO RT _DO Short delay from RS to CS selected 2 CS DELAY LONG _DI Long delay from RS to CS selected Specified times for the short and long delays at the different operating speeds are shown in Table 6 E Table 6 E Short and Long Delays at Different Operating Speeds Short Delay Long Delay 19 2 DSU Ill DBU User Manual 47 Chapter 6 Configuring DTE O ptions Anti Stream The Anti Stream option is used to select the anti stream timeout Figure 6 7 shows the menu path used to access the Anti Stream options menu The anti stream timeout is the maximum time the DSU III DBU transmits data into the network from the DTE This feature prevents one DTE device on a multi drop network from continuously tying up the transmit circuit back to the master DSU The anti stream timer is reset to zero when RS changes to the active state and is updated every second while RS is active When the anti stream timeout expires the DSU IIT DBU stops transmitting DTE data into the network but continues to accept data from it This condition exists until the DTE deactivates the RS input 1 N ETW ORK OPT 2 CONNECTOR TYPE 3 DATA FORMAT 4 DTE CMD OPTION 5 TRAN SMIT CLOCK 6 CS OPTIONS 7 ANTI STREAM 8 CD OPTIONS 9 TR OPTIONS 2 DTE OPTIONS 1 LOC
24. otherwise encodes a message at the transmitter to make it unintelligible at a receiver not equipped with an appropriately set descrambling device service The provision of telecommunications to customers by a common carrier administration or private operating agency using voice data and or video technologies SNMP Simple Network Management Protocol A control and reporting scheme widely used to manage devices from different vendors SNMP operates on top of the Internet protocol SR Data set ready A signal on the EIA 232 interface that indicates if communication is connected and ready to start handshaking control signals so communication can begin switched In regards to DSU CSUS the ability to perform the functions of establishing and releasing connections on a per call basis between two or more circuits services or communications systems The DSU III S2W and DSU III S4W are examples of Switched 56 DSU CSUs 124 DSU Ill DBU User Manual 61200 037L1 1 Glossary tail circuit A feeder circuit which may be digital or analog that provides an access line to a digital or analog network U interface A twisted pair subscriber loop carrying an ISDN 160 kbps digital signal between the ISDN central office and the NT1 at the customer premises UL Underwriters Laboratories A laboratory established by the National Board of Fire Underwriters that tests equipment materials and systems that may affect insurance risks with special r
25. preceding Redial Counter It selects the amount of time between redial attempts to connect the backup line The amount of time which is manually entered can be up to a maximum of 99 seconds The factory default setting is 10 seconds WAIT TO REDIAL TIME __ SEC Table 8 B DBU Options AT Commands for All Models F AT DBU Options CMD Description 1 Disabled _KO Automatic DBU disabled 2 Enabled Ki Automatic DBU enabled 1 DBU with 1 B0 Dial stored 1 2 DBU with 2 _B1 Dial stored 2 1 DBU Originate _E0 Originates call if DDS fails 2 DBU Answer _El Answers call if DDS fails 1 Enabled _G1 DBU when OOS 2 Disa bled G0 No DBU for O0S 1 Enabled _H1 DBU when RX signal absent 2 Disabled _HO No DBU when RX signal absent 1 Enabled a DBU when sealing current absent 2 Disabled _10 No DBU when sealing current absent 1 Disabled P0 No DBU when all 1s 0s detetected 2 Enabled _Pl DBU when all 1s 0s condition exists Auto Restore S31 x Sets restore timer Redial Counter 57 zx Sets redial counter Fail Timer 58 x Sets fail timer Wait to Redial 59 zx Sets time between redial attempts DSU Ill DBU User Manual 65 Chapter 8 Configuring Dial O ptions DBU Options for 2 wire and 4 wire Network Type This option selects the company providing the switched digital service When US Sprint is selected an automatic echo canceler suppressor tone is emitted by the DSU III DBU when dialing Options include AT amp T MCI Other and US Sprint
26. remote DSU III DBU into loopback 1 LO CAL UNIT 2 REM OTE UNIT 1 98376113 3 DBU CONNECTION DIAL STORED EN TER DIAL Figure 11 19 Initiating a DBU Connection Test Interpreting Test Results If the unit is functioning properly the DSU III DBU displays DBU TEST PATTERN TST ERR 0000 100 DSU Ill DBU User Manual 61200 037L1 1 Chapter 12 Manual Command MANUAL COMMAND The Manual Command option is a shortcut method for entering configuration and control commands for the DSU III DBU The first display prompts the user to enter the command num ber COMMAND 00 Figure 12 1 shows the menu path for manual command The available manual commands are listed in Table 12 A 61200 037L1 1 DSU Ill DBU User Manual 101 Chapter 12 Manual Command 1 N ETW ORK OPT 2 DTE OPTIONS 3 TEST OPTIONS 4 DIAL OPTIONS 1 LOCAL 2 REMOTE JENTER ADDRESS COMMAND 0 5 MANUAL COMMANDICOMMAND 00 JVALUE 00 Figure 12 1 Manual Command Use the number keys to enter the hexadecimal command num ber Press Enter to complete Once the command number is entered the display shows both the command number and the present value or setting for the command The command value can be edited or reissued with the existing value COMMAND XX VALUE 00 Use the number keys to enter the hexadecimal value Press Enter to complete The system briefly displays Command Accepted and returns to the active me
27. 037L1 1 DSU Ill DBU User Manual 45 Chapter 6 Configuring DTE O ptions EIA 232 connector is used for 56 kbps and 64 kbps applications A special DSU cable diagram for this application is shown in the appendix ELA 232 Connector Using this option and special cable eliminates data errors caused by excessive delays in the DTE transmit clock receiver and transmit data driver Clear to Send CS Options 3 CONFIG 46 The CS Options menu is used to select the control mode for the CS lead Figure 6 6 shows the menu path used to access the CS options menu The default factory setting is Follows RS with CS Delay Short 1 N ETW ORK OPT 2 DTE OPTIONS 1 DTE RATE 2 CONNECTOR TYPE 3 DATA FORMAT 2 REMOTE EN TER ADDRESS 4 DTE CMD OPTION 5 TRANSMIT CLOCK 1 FORCED ON 1 CS DELAY SHORT 2 FOLLOWS RS 2 CS DELAY LONG 6 CS OPTIONS 3 FOLLOWS CD 7 AN TI STREAM 4 FO LOW S RS CD 1 CS DELAY SHORT 8 CD OPTIONS 2 CS DELAY LONG 9 TR OPTIONS A SR OPTIONS B SECO N DARY RATE 3 TEST OPTIONS 4 DIAL O PTION S 5 MANUAL Figure 6 6 Selecting CS Options If one of the options chosen involves request to send RS then the delay from RS to CS must be selected Table 6 D shows the AT Commands used to set the CS options DSU Ill DBU User Manual 61200 037L1 1 61200 037L1 1 Chapter 6 Configuring DTE O ptions Table 6 D CS Options AT Commands Front AT sugli 1 FORCED ON CS always on 2 FO LLOWS RS CS state same
28. 037L1 1 DSU Ill DBU User Manual 51 Chapter 6 Configuring DTE O ptions Table 6 1 SR Options AT Commands Front AT m 1 FO RCED ON amp S0 C1 2 0 FF OOS ONLY O ff when network out of service 3 0 FF TEST ONLY amp S0 CO O ff for test only 4 0 FF TEST 0 OS amp S1 CO O ff for test and OOS Secondary Rate The Secondary Rate option is used to select the operating speed for the secondary channel if the secondary channel option was selected during setup of the Network Options See Figure 6 11 Use Shift B to activate the secondary rate submenu The factory default is Off 1 N ETW O RK OPT 1 DTE RATE 2 CONNECTOR TYPE 3 DATA FORMAT 2 DTE OPTIONS 4 DTE CMD OPTION 5 TRAN SMIT CLOCK 1 LOCAL 6 CS OPTIONS 1 0 FF 7 ANTI STREAM 2 75 3 CONFIG 8 CD OPTIONS 3 150 2 REMOTE ENTER ADDRESS 9 TR OPTIONS 4 300 A SR OPTIONS 5 600 B SECONDARY RATE 6 1 2K 7 2 4K 3 TEST OPTIONS 4 DIAL OPTIONS 5 MANUAL Figure 6 11 Setting the Secondary Rate 52 DSU Ill DBU User Manual 61200 037L1 1 Chapter 6 Configuring DTE O ptions Table 6 J shows the equivalent AT commands for setting the secondary rate option Table 6 Secondary Rate AT Commands Front AT e 1 0 FF N o secondary channel selected Secondary chanel rate 75 bps 3 150 Secondary channel rate 150 bps 61200 037L1 1 DSU Ill DBU User Manual 53 Chapter 6 Configuring DTE O ptions 54 DSU Ill DBU User Manual 61200 037L1 1 Chapter Configuring Test Options TE
29. 11 14 Initiating a Test Using a Test Pattern Interpreting Test Results If the unit is functioning properly the test error count should be 0 61200 037L1 1 DSU Ill DBU User Manual 95 Chapter 11 Testing and Troubleshooting Self Test The Self Test verifies current operation of the DSU III DBU It can be performed at any time and is recommended if there is any question about the DSU s health Test Purpose The purpose of this test it to determine if the DSU is functioning properly Initiating Follow the menu path outlined in Figure 11 15 to initiate a test using a test pattern 4 DTE WITH TP 5 TEST PATTERN 1 LOCAL UNIT 2 REM OTE UNIT 3 DBU CONNECTION Figure 11 15 Initiating a Self Test Interpreting Test Results 96 Once Self Test is activated the LEDs cycle on and off as the system runs the self test A pass or fail status will be displayed on the LCD along with a checksum indicating the current firmware revision DSU Ill DBU User Manual 61200 037L1 1 Chapter 11 Testing and Troubleshooting REMOTE UNIT DIAGNOSTICS A remote DSU III DBU can perform seven different tests see Table 11 E Table 11 E Remote Tests and AT Commands Front AT RE 122047 PATTERN _TO amp T7 Standard 2047 random data pattern 2 511 PATTERN _T1 amp T7 Standard 511 random data pattern 3 STRESS PTRN 1 _T2 amp T7 DDS Stress Pattern 1 The Remote Unit submenu allows a remotely installed DSU to be placed into lo
30. 1s or all Os condition 6 64 answer AT command 63 105 call 72 74 anti stream 48 49 AT command 49 106 factory default 48 time 110 asynchronous word length 111 AT commands 16 77 105 107 answer 105 anti stream 49 auto answer enable disable 106 auto restore 65 automatic DBU 65 clear to send CS 47 105 clock source select 106 compress option 106 compression 67 61200 037L1 1 data format 43 data set ready SR 52 105 control during test 106 data terminal ready DTR option 105 data terminal ready TR 51 DBU enable disable 106 number to dial 106 originate answer 106 when no RX signal 106 when no sealing current 106 when OOS 106 DBU options 67 dial number 105 DTE data format 105 rate 40 106 routing main backup 106 echo command 105 error control 67 fail timer 65 flow control 67 105 front panel 106 go online 105 hang up 105 inactivity imer 105 initiate remote configuration 106 LLB control 106 loop rate select 106 DSU Ill DBU User Manual 127 Index network address 106 network type 105 no receive RX signal 65 no sealing current 65 number to dial 65 originate answer 65 out of service OO S 65 password control 106 entry 106 verify 106 phone number 62 105 power up user profile 105 re execute command 105 redial counter 65 reset 105 restore factory options 105 result code display 105 result code from firmware 105 RTS CTS delay 106 S register read 105 write to 105 scrambler
31. 3 TEST OPTIONS 2 RDL EN DIS 3 EIA LLB EN DIS 4 EIA RLB EN DIS 5 DSU ANS TEST 1 LOCAL 2 REMOTE ENTER ADDRESS 4 DIAL OPTIONS Figure 7 2 Remote Digital Loopback 56 DSU Ill DBU User Manual 61200 037L1 1 Chapter 7 Configuring Test O ptions EIA LLB The EIA LLB Electronics Industries Association local loopback option specifies whether or not the DSU III DBU responds to the local loopback input from the DTE The factory default setting is Disabled Figure 7 3 shows the menu path used to access the EIA LLB option 1 N ETW O RK TYPE 2 DTE OPTIONS 1 TEST TIMEOUT 3 TEST OPTIONS 2 RDL EN DIS 3 EIA LLB EN DIS 4 EIA RLB EN DIS 5 DBU ANS TEST 1 LOCAL 2 REMOTE JENTER ADDRESS 1 DISABLED 2 EN ABLED 4 DIAL O PTION S Figure 7 3 EIA Local Loopback Options EIA RLB The EIA RLB remote loopback option specifies whether or not the DSU III DBU responds to the RLB input from the DTE The factory default setting is Disabled Figure 7 4 shows the menu path for the EIA RLB options 1 N ETW O RK TYPE 2 DTE OPTIONS 1 TEST TIM EO UT 3 TEST OPTIONS RDL EN DIS 3 EIA LLB EN DIS 4 EIA RLB EN DIS 5 DBU ANS TEST 1 LOCAL 2 REMOTE JENTER ADDRESS 1 DISABLED 2 EN ABLED Figure 7 4 EIA Remote Loopback Options 61200 037L1 1 DSU Ill DBU User Manual 57 Chapter 7 Configuring Test O ptions DBU Answer Test The dial backup connection can be tes
32. 5 Chapter 10 Status 76 DSU Ill DBU User Manual 61200 037L1 1 Chapter 11 Testing and Troubleshooting TEST OVERVIEW CAUTION 61200 037L1 1 The DSU III DBU performs a variety of diagnostic functions that isolate portions of the circuit to identify the problem source Tests may be initiated and terminated from the front panel or the DTE interface In asynchronous mode AT commands can control the testing from the DTE interface For synchronous operation V 25 bis commands can provide test control The unit also responds to standard DDS network tests initiated from telco test centers In addition it can run several tests such as local and remote loopbacks to aid in problem isolation LO CAL REMO TE DSU CSU DSU CSU DTE Tx i Tx Tx TX TD Rx lil Rx Rx Lil Rx RD Figure 11 1 Normal Operation Before Initiating Loopback Test All diagnostic tests disrupt data flow DSU Ill DBU User Manual 77 Chapter 11 Testing and Troubleshooting Initiating a Test Initiate tests using the following procedure 1 Select Test from the Main menu by pressing 2 then press Enter 2 Specify local remote or DBU testing by selecting the corre sponding number followed by Enter Use the Up and Down arrows to view test options 4 Select a test from the available options by pressing the corresponding number followed by Enter ies The example in Figu
33. 5 AT commands 51 factory default 50 DATAPATH 1 4 DBU abort call timer 110 DBU answer test 58 DBU auto restore time 110 DBU connection 99 DBU enable disable ATcommand 106 DBU line in RDL 73 DBU number to dial 110 AT command 106 DBU online test 70 DBU options 2 wire and 4 wire 66 all models 63 65 AT commands 67 ISDN 68 61200 037L1 1 Index V 32 bis 66 67 DBU originate answer 110 ATcommand 106 DBU passcode 68 DBU status 72 DBU when no RX signal 110 ATcommand 106 DBU when no sealing current ATcommand 106 DBU whenOOS 110 AT command 106 DDS 121 DDS circuit conditions for returning to 6 DDS network status 74 DDS stress patterns 1 4 121 diagnostics 118 dial 22 dial backup 70 configuration 59 68 ISDN 61 mode 69 entering 5 status 72 status information 72 dial number AT command 105 dial options 29 69 70 dial up operation 109 dialing 73 digital data service DDS 1 3 5 6 10 37 69 down arrow 22 25 DSU 121 DSU loopback 121 DSU status 74 DSU to modem interconnect 113 DTE 122 DTE amp loop LL 86 DTE command option 44 DSU Ill DBU User Manual 129 Index DTE command set 110 DTE connectors 26 DTE control leads 75 DTE data connection 11 DTE data format 110 AT command 105 DTE interface 27 77 118 parameters 29 DTE only 90 DTE options 29 DTE rate 39 71 110 117 AT commands 40 factory default 39 for 56 kbps loop rate with no second ary 40 same as the network 39 select AT
34. 7 8 CF Carrier Detect CD on all the time BA BB CA Request to Send RS cB cc AB B a Ru 6 c 7 A A BB A B C B CF DSU Ill DBU User Manual 61200 037L1 1 Chapter 2 Installation CONFIGURATION The DSU III contains four different user profiles sets of configu ration options that are stored in read only memory These profiles are listed in the appendix Default Configuration Profiles The unit is shipped from the factory with profile 1 default configuration loaded into the nonvolatile configuration memory If profile 1 matches the desired system requirements then no additional configuration is required to put the unit into service If profile 1 does not match the desired system require ments modify the default configuration or select another profile more closely matching the desired configuration and modify When a new profile is loaded or the existing profile is modified it is stored in the nonvolatile configuration memory The DSU III DBU is then configured with that profile every time power is turned on or the unit is reset See the chapter Manual Command for information on loading default configuration profiles Configuration Methods The DSU III DBU provides three methods for local configuration and three different methods for remote configuration AT commands V 25 commands and front panel commands 61200 037L1 1 DSU Ill DBU User Manual 15 Chapter 2 Instal
35. ADRAN DSU III DBU Data Service Unit USER MANUAL Part Number Version 12000371 Switched 4 Wire Version 12020371 Switched 4 Wire Version Second Generation 120003712 V 32 Version 120203712 V 32 Version Second Generation 120003713 Switched 2 Wire Version 120203713 Switched 2 Wire Version Second Generation 120003714 ISDN Version 120203714 ISDN Version Second Generation 1202037L5 V 34 Version 61200 037L1 1G July 1997 Trademark DATAPATH is a registered trademark of CAE electronics and is used by Northern Telecom under license Hayes is a registered trademark of Hayes Microcomputer Products Inc ADRAN 901 Explorer Boulevard P O Box 140000 Huntsville AL 35814 4000 Phone 205 963 8000 1997 ADTRAN Inc All rights reserved Printed in USA FCC regulations require that the following information be provided in this manual 1 This equipment complies with Part 68 of the FCC rules On the bottom of the equipment housing is a label that shows the FCC registration number and ringer equivalence number REN for this equipment If requested provide this information to the telephone company If this equipment causes harm to the telephone network the telephone company may temporarily discontinue service If possible advance notification is given otherwise notification is given as soon as possible The telephone company will advise the customer of the right to file a complaint with the FCC The telephone compan
36. AL 2 REMOTE JENTER ADDRESS 1 TIMER OFF 2 TIM E 10 SEC 3 TIME 30 SEC 4 TIME 60 SEC 3 TEST OPTIONS 4 DIAL OPTIONS B SECO N DARY RATE Figure 6 7 Anti Stream Options The factory default setting is Timer Off Table 6 F shows the available options and their AT commands 48 DSU Ill DBU User Manual 61200 037L1 1 Chapter 6 Configuring DTE O ptions Table 6 F Anti Stream AT Commands Front AT igs 1 Timer O ff Anti stream timer disabled 2 Time 10 Sec T1 Timeout equals 10 seconds 3 Time 30 Sec T2 Timeout equals 30 seconds 4 Time 60 Sec 9613 Timeout equals 60 seconds CD Options The CD Options menu is used to select the control mode for the receive line signal detector CD lead The default factory setting is Normal see Figure 6 8 1 NETW ORK OPT 2 CONNECTOR TYPE 3 DATA FO RMAT 4 DTE CMD OPTION 5 TRANSMIT CLOCK 6 CS OPTIONS 7 ANTI STREAM 2 DTE OPTIONS 1 LO CAL 2 REMOTE ENTER ADDRESS 2 NORMAL 3 TEST OPTIONS 9 TR OPTIONS B SECO N DARY RATE Figure 6 8 Selecting CD Options Table 6 G shows the equivalent AT commands for setting CD options 61200 037L1 1 DSU Ill DBU User Manual 49 Chapter 6 Configuring DTE O ptions Table 6 G CD Options AT Commands Front AT _ 1 FORCED ON amp CO Onall the time 2 NORMAL amp C1 On only when data present on loop Data Terminal Ready TR Options The TR Options menu is used to sele
37. BU monitors the receive data for strings of 1s or Os that are longer than the Fail Timer If this condition is detected the local DSU III DBU initiates a handshake routine with the remote unit to determine if the DTE is generating the constant data pattern or if the network has failed Auto Restore Once the DDS circuit is restored the DSU III DBU remains in backup until the DDS circuit is active for the length of time specified for the restore timer The selection is entered in min utes up to 255 If set to 0 the DDS must be restored manually The factory default setting is 1 minute RESTORE TIMER 0 OFF __ MIN Redial Counter This option sets the number of times the DSU III DBU redials the far end when entering backup mode The redial count which is manually entered can be up to a maximum of 99 attempts If the DSU III DBU encounters a busy or reorder it attempts to estab lish the call the specified number of times The factory default setting is 5 ENTER REDIAL COUNT Fail Timer This option sets the amount of time the dedicated circuit failure condition must be active before the DSU III DBU attempts backup The amount of time which is manually entered can be up to a maximum of 99 seconds The factory default setting is 3 seconds AUTO DBU FAIL TIME SEC DSU Ill DBU User Manual 61200 037L1 1 61200 037L1 1 Chapter 8 Configuring Dial O ptions Wait to Redial This option works in conjunction with the
38. DBU 61200 037L1 1 DSU Ill DBU User Manual 89 Chapter 11 Testing and Troubleshooting DTE Only NOTE Test Purpose Initiating 90 The DTE Only test provides a method for testing both the DTE interface drivers and receivers of the local DSU III DBU plus its loop transmitter and receiver For this test the loop transmit data is connected to the loop receive data at a point close to the physical network interface This test can be used to verify proper operation between the local DTE and the local DSU III DBU When this test is implemented the far unit receives an OOS OOF message from the network and enters an alarm state LOCAL DTE DSU CSU Figure 11 9 DTE Only Test Diagram The DTE Only test is used for the following purposes Verify integrity of the DTE interface Verify integrity of connection between DTE and DSU III DBU Follow the menu path outlined in Figure 11 10 to initiate a DTE Only test DSU Ill DBU User Manual 61200 037L1 1 Chapter 11 Testing and Troubleshooting 1 DTE amp LOO P LL 2 10 OP ONLY RT 3 DTE ONLY 1 LOCAL UNIT 2 REMO TE UNIT 3 DBU CONNECTION Figure 11 10 Initiating a DTE Only Test Interpreting Test Results A BERT tester must be used to interpret the test results of a DTE Only test 61200 037L1 1 DSU Ill DBU User Manual 91 Chapter 11 Testing and Troubleshooting DTE With Test Pattern Test Purpose Initiating 92 The DTE with T
39. HONE NUMBER EDIT 1 10 INNNNNNN ISDN Dial Backup ISTO RED NUMBER 9 EDIT SPID NUMBER INNNNNNN STO RED NUMBER 10 JEDIT LOC DIRECTO RY NUM INNNNNNN 1 AUTO MATIC DBU f1 DISABLED 2 EN ABLED 2 N UMBER TO DIAL 1 DBU WITH 1 2 DBU WITH 2 3 0RIGIN ANSWER 1 DBU ORIGINATE 2 DBU ANSWER 1 EN ABLED 4 W HEN OOS 2 DISA BLED 5 NO RX SGNL 2 DBU OPTIONS 6 NO SEAL CUR 7 WHEN AlL1s 0s J1 ENABLED 2 DISABLED 8 AUTO RESTO RE 1 EN ABLED 2 DISABLED RESTO RE TIM ER 9 REDIAL COUNTER ENTER REDIAL COUNT A FAIL TIMER 0 0 FF MIN B W AIT TO REDIAL AUTO DBU FAIL TIME WAIT TO REDIAL 2 wire amp 4 wire Dial Backup C N ETW O RK TYPE 1 AT amp T MCI OTHER 2 US SPRINT V 32bis and V 34 Dial Backup C ERROR CONTROL 4 AUTO MNP 5 RELIABLE V 42 6 REL V 42 MNP 7 AUTO V 42 MNP TIM E SEC D FLOW CONTROL 1 DISABLED 4 RTS CTS E CO M PRESSIO N 2 EN ABLED 5 UNI XO N XO FF ISDN Dial Backup C SW ITCH TYPE 1 AT amp T 5ESS 2 NT DMS 100 3zNATIONALISDN 1 1 ENABLED 2 DISABLED Chapter 4 Configuration O verview 32 DSU Ill DBU User Manual 61200 037L1 1 Chapter 5 Configuring Network Options NETWORK OPTIONS The Network Options configuration parameters control the loop operation of the DSU III DBU Once a parameter is set Command Accepted is displayed briefly before returning to the active menu Table 5 A sh
40. LB control AT command 106 local configuration 29 local DTE and loop test 123 local loopback 75 77 local unit test 84 long code 110 loop is normal 74 75 loop only RT 88 loop rate 23 34 111 AT command 106 loss of sealing current 5 61200 037L1 1 Index M main menu 21 25 79 manual command 29 101 103 menu navigation 21 22 23 modem tail circuit application 113 multidrop 123 national ISDN1 68 network interface connection 10 interface parameters 29 network address 36 AT command 106 network options 23 29 33 37 network rate 71 network status 74 network timing 110 network type 66 AT command 105 no DBU installed DBU status 72 no receive RX signal 6 63 73 AT commands 65 no sealing current 63 AT commands 65 no wink from CO 73 notinstalled 73 NTDMS 100 68 number to dial 63 AT commands 65 numeric keypad 24 O 00S OOF from net 73 005 00F from telco 75 open loop 73 75 operating modes 117 operation 21 27 77 100 DSU Ill DBU User Manual 131 Index originate 63 originate answer 63 AT commands 65 out of service 00S 63 AT commands 65 signal 6 outofband 123 P password control AT command 106 password entry AT command 106 password verify AT command 106 phone number 61 AT command 62 105 pin assignments auxiliary EIA 232 connector 14 line 1 connector 10 line 2 connector 11 primary EIA 232 connector 12 primary V 35 connector 13 pointto point 123 pointto point operation 41 109
41. P test pattern test is similar to the DTE Only test described previously except the test pattern is generated using the DSU CSU internal test pattern generator This test can be used to detect deficiencies within the internal drivers and receivers of the DSU III DBU Figure 11 11 illustrates the loopback point and the data paths for this test LO CAL DSU CSU Figure 11 11 DTE with Test Pattern A DTE test using a test pattern is used for the following pur poses Verify integrity of the DTE interface Verify integrity of connection between DTE and DSU III DBU Follow the menu path outlined in Figure 11 12 to initiate a DTE Test using a Test Pattern DSU Ill DBU User Manual 61200 037L1 1 Chapter 11 Testing and Troubleshooting 1 DTE amp LOO P LL 2 100 P ONLY RT 122047 PATTERN 2 511 PATTERN 3 STRESS PTRN 1 4 STRESS PTRN 2 5 STRESS PTRN 3 6 STRESS PTRN 4 1 LOCAL UNIT 2 REM OTE UNIT 3 DBU CONNECTION Figure 11 12 Initiating a DTE Test with Test Pattern Interpreting Test Results If the unit is functioning properly the DSU III DBU displays DTE WITH TP TST ERR XX The first line of the display indicates the type of test being performed while the second line of the display indicates the number of errors accumulated by the test pattern detector If errors occur during this test the test error count can be reset to zero by pressing 1 To verify proper operation of this t
42. Press Enter to select the item DSU Ill DBU User Manual 61200 037L1 1 Chapter 3 Operation The following example and Figure 3 1 illustrate how to select the DSU III DBU loop rate options 1 Select Configuration CONFIG by pressing 3 then press Enter 2 Select LOCAL or REMOTE configuration by pressing the corresponding number then press Enter Use the Up and Down Arrows to view submenu items 4 Choose an item on the submenu such as Network Options NETWORK OPT 5 To select NETWORK OPT press 1 then press Enter 6 To select LOOP RATE options press 1 then press Enter e 1 LOOP RATE 2 N ETW O RK ADDR 3 REM O TE CON FIG 4 C LOCK SOURCE 1 LOCAL 2 REM OTE 1 NETWORK OPT 2 DTE OPTIONS 3 TEST OPTIONS 3 CONFIG 5 MANUAL COMMAND Figure 3 1 Example of Basic Menu Navigation FRONT PANEL The DSU III DBU faceplate is shown in Figure 3 2 61200 037L1 1 DSU Ill DBU User Manual 23 Chapter 3 Operation DSU Ill DBU Figure 3 2 DSU III DBU Front View The following function descriptions apply to both the stand alone unit and the rackmount unit when using the DATAMATE modules LCD Window The LCD window displays menu items and messages in 2 lines by 16 characters Enter Enter selects active menu items To activate a menu item press the number of the item When the menu item is flashing active press Ente
43. ST OPTIONS The Test Options menu enables or disables different test modes and specifies the maximum test time allowed Table 7 A shows the AT commands for setting the Test options Table 7 A Test Options AT Commands Front AT mn Enter Timeout Specify 0 255 second test timeout RDL Ignored RDL request from remote DSU ignored EIA LLB Disabled EIA RLB Disabled _RO No response to remote loopback Responds to remote loopback 61200 037L1 1 DSU Ill DBU User Manual 55 Chapter 7 Configuring Test O ptions Test Timeout The Test Timeout option sets the length of time a DSU III DBU remains in a test mode before automatically returning to the data mode Enter the timeout in two digit decimal value The factory default setting is off 0 Figure 7 1 shows the menu path used to access Test Timeout 1 N ETW ORK OPT 2 DTE OPTIONS 1 LOCAL 2 REMOTE JENTER ADDRESS 1 TEST TIMEOUT ENTER TIMEOUT 2 RDL EN DIS O OFF 00 SEC 3 EIA LLB EN DIS 4 EIA RLB EN DIS 5 DBU ANS TEST 3 TEST OPTIONS 4 DIAL O PTIO NS Figure 7 1 Setting Test Timeout Option Remote Digital Loopback RDL The RDL option specifies whether or not the DSU III DBU responds to an RDL request from the far end of the circuit The factory default setting is RDL Accepted Figure 7 2 shows the menu path for the RDL option 1 N ETW ORK TYPE 2 DTE OPTIONS 1 RDL IGN O RED 2 RDL ACCEPTED
44. Stress Patterns 1 4 A series of test patterns designed to test DDS circuits Each pattern is designed to stress the DDS circuit in a particular manner to assure its reliability DSU See data service unit DSU loopback A telco initiated test which loops the DSU back to the telco and is used to test the DDS circuit as well as the DSU CSU 61200 037114 DSU Ill DBU User Manual 121 Glossary DTE Data terminal equipment In the EIA 232C standard specification the EIA 232C is connected between the DCE and a DTE The main difference between the DCE and the DTE is that pins two and three are reversed DTE to loop rate matching A feature designed into ADTRAN DSU CSU products that allows slower DTE devices to communicate over 56 64 kbps digital circuits DTR dialing Data terminal ready A control signal sent from the DTE to the DCE that indicates the DTE is powered on and ready to communicate DTR dialing allows a DSU CSU to dial a predetermined number when DTR goes high EIA 232C A set of standards specifying various electrical and mechanical characteristics for interfaces between computers terminals and modems Defines the mechanical and electrical characteristics for connecting DTE and DCE data communications devices It defines what the interface does circuit functions and their corresponding connector pin assignments The standard applies to both synchronous and asynchronous binary data transmission EIA 366A An EIA interface sta
45. TRAN DSU III DBU With ISDN Dial Backup For ADTRAN DSU III DBU ISDN applications the following guide can be used as an aid in ordering basic ISDN service from your local telephone company The ADTRAN DSU III DBU ISDN includes NT1 and Terminal adapter functionality and supports data rates up to 64 kbps Request an ISDN Basic Rate Interface BRI line with the following features U interface reference point 2B1Q line coding 1B D Service supports up to 64 kbps The DSU III DBU ISDN supports the following switch types and software protocols AT amp T 5ESS Custom 5E6 and later software National ISDN 1 NT1 DMS 100 BCS 32 and later software Pvc1 National ISDN 1 Pvc2 Siemens EWSD National ISDN 1 Request that the ISDN line allocate one DYNAMIC Terminal Endpoint Identifier TEI for the number For service offered from an AT amp T 5ESS request a point to point line with the following features Feature Value B1 Service On Demand DMD Data Line Class Point to Point Maximum B Channels 1 1B D Circuit Switched Data CSD Bearer Channels Any Number of CSD Calls 1 1B D Terminal Type Type A Turn the Following Features Off Packet Mode Data Multi line Hunt Multiple Call Appearances Electronic Key Telephone Sets EKTS Shared Dictionary Numbers Accept Special Type of Number Intercom Groups Network Resource Selector Modem Pools Message Waiting Hunting InterLata Competition For service offered from a Nort
46. TURES 61200 037L1 1 This section describes the standard specifications and features incorporated in the DSU III DBU Operating Modes Dedicated DDS Point to point and multipoint Switched Backup Automatic or manual 4 wire Switched 56 2 wire Switched 56 V 32 bis V 42 bis or ISDN 1B D Data Rates Dedicated mode service rates 2 4 4 8 9 6 19 2 38 4 56 and 64 kbps Switched mode service rate 56 kbps and 64 kbps DTE Rates DTE to loop rate matching in both dedicated and switched modes Synchronous rates 2 4 4 8 9 6 19 2 38 4 56 and 64 Asynchronous rates 2 4 4 8 9 6 19 2 38 4 and 57 6 kbps DTE Interface Data Rates V 35 and EIA 232 up to 57 6 kbps async up to 64 kbps sync FCC Approval FCC part 15 class A and Part 68 DSU Ill DBU User Manual 117 Appendix E Specifications Summary 118 DTE Interfaces Both EIA 232 and V 35 electrical and physical DTE interfaces Data Buffering Internal slack buffer Clocking Normal DDS or private network tributary slaved to network receive clock Private network master internal clock Private network master slaved to external clock Diagnostics Network CSU and DSU loopbacks User Local DTE and loop remote V 54 Test Patterns 2047 511 DDS and stress patterns 1 4 Line Requirements Loop transmission parameters as defined in AT amp T PUB 62310 Dedicated DDS AT amp T PUB 41468 Switched 56 SPRINT TS 0046 Switched 56 Line Interface RJ 485
47. able AA AT Commandes rper epo ente vertente rte 105 Table B A Default Configuration Profiles iii 110 List of Figures Figure 1 1 Typical Point to Point Application for DSU III DBU 2 Figure3 1 Example of Basic Menu Navigation sicsisniren sosaren 23 Figure3 2 DSU III DBU Front View sine 24 Figure3 3 DSU III DBU Rear View ss 27 Figure4 1 Complete Configuration Menu uu 31 Figure5 1 Setting Loop Rate Options ss 35 Figure 5 2 Setting the Network Address iii 36 Figure 5 3 Remote Configuration ss 36 Figure 5 4 Setting the Clock Source ss 37 Figure6 Selecting DIE RATES eese nene see e tene e mee nie i Sued acute 40 Figure6 2 Selecting the Connector Type ss 42 Figure6 3 Selecting Asynchronous or Synchronous Data Format 43 Figure 6 4 Selecting DTE Command Option ss 44 61200 037L1 1 DSU Ill DBU User Manual vii Table of Contents Figure 6 5 Transmit Clock Options etiim t nement 45 Figure 6 6 Selecting CS ODpHOTDS etre iem emn neue ina 46 Figure 6 Anti Stresni Options Lirica 48 Figure 6 8 Selecting CD Options 49 Figure 6 9 Selecting Data Terminal Ready TR Options sss 50 Figure 6 10 Setting Data Set Ready SR Options senere 51 Figure 6 11 Setting the Secondary Rate ui 52 Figure7 1 Setting Test Timeout Option ss 56 Figure 7 2 Remote Digital Loopbac
48. able with additional options for specific backup services Table 8 B lists the DBU options and their AT commands for all models Automatic DBU The Automatic DBU option specifies whether the unit automati cally enters dial backup mode or waits for manual setup The factory default setting is Disable Number to Dial The Number to Dial option offers a selection of stored numbers for the unit to automatically dial If the leased line fails and the DSU III DBU is set to originate it dials the numbers in chrono logical order specified under this option to set up the dial backup line The factory default setting is Dial Stored 1 Originate Answer This option specifies whether the DSU III DBU originates or waits to answer if the dedicated circuit fails One end must be set to Originate and the other to Answer The factory default setting is Answer When Out of Service OOS When enabled the DSU III DBU enters backup mode if an out of service condition is detected The factory default setting is Enable No Receive RX Signal When enabled the DSU III DBU enters backup mode when a loss of signal is detected The factory default setting is Enable No Sealing Current When enabled the DSU III DBU enters backup mode when a loss of sealing current is detected The factory default setting is Enable DSU Ill DBU User Manual 63 Chapter 8 Configuring Dial O ptions 64 When all 1s 0s When this option is enabled the DSU III D
49. all 15 0s I e 61200 037L1 1 DSU Ill DBU User Manual 111 Appendix B Default Configuration Profiles 112 DSU Ill DBU User Manual 61200 037L1 1 Appendix C DSU to Modem Interconnect MODEM TAIL CIRCUIT APPLICATION A DSU to modem interconnect diagram for a modem tail circuit application is shown in Figure C 1 RCO gt ETC ETC lt _ RC M D O S WRD D ff E Ill i TD 9 RD For M ulti drop requirement DCD RTS RTS DCD Figure C 1 DSU to Modem Interconnect 61200 037L1 1 DSU Ill DBU User Manual 113 Appendix C DSU to Modem Interconnect 114 DSU Ill DBU User Manual 61200 037L1 1 Appendix D ElA 232 Connector 56 AND 64 KBPS APPLICATION The EIA 232 connector shown in Figure D 1 may be used for 56 and 64 kbps applications Using the External clock option and this cable should eliminate data errors caused by excessive delays in the DTE transmit clock receiver and transmit data driver When creating this cable at the DTE interface ELA 232 connector tie the transmit clock lead TC to the external trans mit clock lead ETC as shown DTE DSU Ill DBU Pin 15 TC Pin 24 ETC No connection EIA 232 CONNECTOR Figure D 1 EIA 232 Connector 61200 037L1 1 DSU Ill DBU User Manual 115 Appendix D EIA 232 Connector 116 DSU Ill DBU User Manual 61200 037L1 1 Appendix E Specifications Summary SPECIFICATIONS AND FEA
50. annel rate is determined by the current loop rate The DSU III DBU does not support subrates operating over a 64 kbps loop rate 1 NO SEC CH 2 SEC CHANNEL 1 LOOP RATE 1 NETWORK OPT 2 N ETW ORK ADDR 4 CLOCK SOURCE 2 DTE OPTIONS 4 DIAL OPTIONS 5 MANUAL COMMAND Figure 5 1 Setting Loop Rate Options The default factory setting is Auto with no secondary channel The various loop rates and format selections are listed in Table 5 A with the equivalent AT commands that perform the same configuration functions DSU Ill DBU User Manual 35 Chapter 5 Configuring N etwork O ptions Network Address A two digit decimal address can be assigned to each DSU III DBU This addressing capability makes it possible to perform remote configuration and testing in point to point and multi drop networks Figure 5 2 shows the menu path used to change the network address The factory default setting is 0 1 LO OP RATE 1 NETWORK OPT ENTER NETWORK 2 NETWORK ADDR JADDRESS 0 3 REMOTE CONFIG 4 CLOCK SOURCE 2 DTE OPTIONS 3 TEST OPTIONS 4 DIAL OPTIONS 5 MANUAL COMMAND 3 CONFIG 2 REMOTE JENTER ADDRESS Figure 5 2 Setting the Network Address Remote Configuration This option sets up the DSU III DBU to accept or reject remote configuration commands Figure 5 3 shows the menu path for enabling disabling remote configuration The factory default setting is Enabled
51. anual v Table of Contents Appendix A AT Commands msn 105 Appendix B Default Configuration Profiles Default Configuration Profiles err treten eet Pet rettet spiego 109 Profile 4 air 109 luu M 109 Profiles and 4 cinzia 109 Appendix C DSU to Modem Interconnect Modem Tail Circuit Application rettet ieri pesi 113 Appendix D EIA 232 Connector 56 and 64 kbps Application ee atem deren 115 Appendix E Specifications Summary Specitication and Peat res oen eee 117 Operating Modes ni abt dede estende ie tees 117 D ta Rates M 117 DTE RATS nee entiere te once 117 DTE Interface Data Rates rtr anses 117 FCC Approval sereni aaa 117 DTE Interfaces ui 118 Data butferne ian aio min entendi een 118 Gd 118 Das tiOSU CS een ka nie iaia 118 Line Requirements ss 118 Line Interface ssl ete c tines 118 Receiver Sensitivity inerte i een nm n Eee te ee bee re rigare oret 118 ENV ATOMIMONE Gana 118 Physical reale arie 118 POWER SR ici ian 118 en I 119 End M 127 List of Tables Table 2 A Pin Assignments for Line 1 Connector sese 10 Table 2 B Pin Assignments for Line 2 Connector ss 11 Table 2 C Pin Assignments for Primary EIA 232 Connector 12 vi DSU Ill DBU User Manual 61200 037L1 1
52. ata from RL He the DTE after 30 bytes in a row detected 64 kbps loop rate only If the DSU III DBU is set for a loop rate of 56 kbps secondary channel or 64 kbps then scrambler on off options are available The factory default setting is Scrambler Off For point to point operation at 56 kbps with secondary channel the network requires that the primary and secondary channel data not be all zeros simultaneously For HDLC protocol applications this constraint can be eliminated by selecting either the Data Invert option or the Scrambler On option For 64 kbps clear channel operation there is a possibility the DTE data sequences might mimic network loop maintenance functions and erroneously cause other network elements to activate loopbacks To prevent this the Scrambler On option should be selected for both the local and remote DSU III DBU DSU Ill DBU User Manual 41 Chapter 6 Configuring DTE O ptions Connector Type The Connector Type option is used to specify which of the primary channel connectors is used to connect to the DTE Figure 6 2 shows the menu path used to set the connector type The factory default setting is V 35 There are no AT commands available to set the connector type 1 NETW ORK OPT 1 DTE RATE 2 DTE OPTIONS 1 RS 232 2 CONNECTOR TYPE 2 V 35 1 LOCAL 2 REMOTE ENTER ADDRESS 3 TEST OPTIONS 5 MANUAL COMMAND B SECON DARY RATE Figure 6 2 Selecting the Connector Type 42 DSU
53. ated on the customer premises including telephone sets private branch exchanges PBXs data terminals and customer owned coin operated telephones CS See CTS CSU See Channel Service Unit 120 DSU Ill DBU User Manual 61200 037L1 1 G lossary CSU loopback A telco initiated test which loops the CSU portion of the DSU CSU back to the telco and allows the telco to test the DDS circuit as well as the CSU portion of the customer s DSU CSU CTS Clear to send A signal on the DTE interface indicating that the DCE is clear to send data Sometimes referred to as CS data compression A technique for encoding information so that fewer data bits are required to represent a given amount of data Compression facilitates the transmission of more data for a given amount of transmission time and circuit capacity It also reduces the amount of memory required for data storage data service unit DSU A device designed to transmit and receive digital data on digital transmission facilities DDS Dataphone Digital Service also called Digital Data System A private line digital service for transmitting data end to end at speeds of 2 4 4 8 9 6 and 56 kbps and in some cases 19 2 38 4 or 64 kbps The systems can use central hub offices for obtaining test access bridging legs of multipoint circuits and cross connecting equipment DDS is offered on an inter LATA basis by AT amp T and on an intra LATA basis by the Bell operating companies DDS
54. cessive errors requiring retransmis sion of data first perform a DTE with Test Pattern to determine if the unit s internal transmitter and receiver is operating error free If problem persists perform a Remote Test to verify the connection between the local and remote unit is error free Run the test using all available test patterns If an external BERT tester is available these additional tests may be performed DTE amp Loop Test e DTE Only Test Loop Only Test If the unit fails any of these tests or the problem has not been determined contact ADTRAN Technical Support see inside back cover DSU Ill DBU User Manual 83 Chapter 11 Testing and Troubleshooting LOCAL UNIT DIAGNOSTICS The local DSU III DBU can perform six different tests see Table 11 C Table 11 C Test AT Commands Front AT Panel Description Display crema emiten STI 678 Test Pattern amp T9 Transmit Receive Test Pattern Self Test Check Internal Components Resets Unit Exit Test Stops test returns to data mode TD Customer Transmit Data RD Customer Receive Data TX Network Transmit Data RX Network Receive Data The test patterns shown in Table 11 D are available for the DTE with Test Pattern and Test Pattern tests 84 DSU Ill DBU User Manual 61200 037L1 1 Chapter 11 Testing and Troubleshooting Table 11 D DTE With Test Pattern Commands Front AT um 122047 PATTERN TO amp T8 Standard 2047 random data pattern 2
55. command 106 DTE routing main backup AT command 106 DTE status 75 DTE to loop rate matching 122 DTE type 110 DTR command timeout 110 DTR option AT command 105 DTR recognize delay 110 DTR dialing 122 DU DBU status 72 echo command AT command 105 EIA controlled LLB 110 EIA controlled RLB 110 EIA local loopback LLB 57 EIA remote loopback RLB 57 EIA 232 connector 115 auxiliary 14 pin assignments 12 14 EIA 232 interface 1 130 DSU Ill DBU User Manual EIA 232C 122 EIA 366A 122 enter 22 24 environment 118 error control 66 AT commands 67 escape character 110 escape guard timer 110 exittest 79 external clock 45 115 F fail imer 64 AT command 65 FCC Part 15 of ClassA 122 FCC Part 15 of Class B 122 FCC Part68 122 flow control 105 AT commands 66 67 front panel AT commands 106 enable disable 110 function keys 22 G go online AT command 105 going to DBU 73 74 H hang up 70 AT command 105 idle 73 in dial backup 73 75 in band 122 inactivity timer 110 ATcommand 105 61200 037L1 1 incoming call 73 initiate remote configuration ATcommand 106 installation 9 19 INV 18 INVBL 18 INVBM 18 INVCU 18 INVPS 18 INVPV 18 ISDN 123 DBU options 68 DBU status 72 dial backup 61 L LB enable disable AT command 106 LCD window 24 LED description 25 26 line 1 connector 10 line 2 connector 10 line feed character 110 line interfaces 118 line requirements 118 LL test from telco 75 L
56. control 106 secondary rate 53 serial number 106 test commands 105 test pattern 106 transmit clock 45 105 view current configuration 105 wait to redial 65 AT password control 110 AT amp T 5ESS 68 AT amp T Publication 41458 119 AT amp T Publication 62310 119 auto answer enable disable AT command 106 auto DBU fail 64 auto restore AT commands 65 128 automatic DBU 63 AT commands 65 auxiliary EIA 232 27 back space character 110 BERT 119 C call disconnect 72 cancel 22 25 carriage return character 110 carrier detect CD 26 49 110 channel service unit 120 check telco 74 clear to send CS 25 46 47 110 AT commands 47 105 clock source 37 AT command 106 clocking 118 120 command echo 110 compress option AT command 106 compression 66 AT commands 67 configuration 22 dial backup 59 68 DTE options 39 local 29 methods 15 network options 33 remote 29 test options 55 58 configuration local 19 configuration remote 19 connector EIA 232 115 connector type 42 factory default 42 DSU Ill DBU User Manual 61200 037L1 1 control port 120 CPE 120 CS 120 CSU 120 CSU loopback 121 CTS 120 121 customer service 7 9 D data buffering 118 data compression 111 121 data format 43 71 AT commands 43 factory default 43 data invertoption 41 data mode 74 data rates 117 data service unit 121 data set ready SR 51 52 75 AT commands 52 106 factory default 51 data terminal ready TR 50 51 7
57. ct the DSU III DBU response to the data terminal ready TR lead The factory default setting is Ignored see Figure 6 9 1 N ETW ORK OPT 2 DTE OPTIONS 1 LOCAL 2 REMOTE ENTER ADDRESS 1 IGNORED 22COMMAND SW ITCH 3 NO DBU IF OFF 3 CONFIG B SECO N DARY RATE 3 TEST OPTIONS 4 DIAL OPTIONS Figure 6 9 Selecting Data Terminal Ready TR Options Table 6 H shows the equivalent AT commands for setting TR options 50 DSU Ill DBU User Manual 61200 037L1 1 Chapter 6 Configuring DTE O ptions Table 6 H TR Options AT Commands Front AT m 1 IG N O RE amp DO ignore the TR input 2 COMMAND SWITCH amp D2 Switch to command state if TR is off Data Set Ready SR Options The SR Options menu is used to select the operating mode for the data set ready SR lead Use Shift A to activate the SR Options submenu press Enter to enter the SR Options submenu The factory default setting is Off Test Only shown in Figure 6 10 1 N ETW O RK O PT 2 CONNECTOR TYPE 3 DATA FORMAT 4 DTE CMD OPTION 5 TRAN SMIT CLOCK 2 DTE OPTIONS 1 LOCAL 3 TEST OPTIONS 2 REMOTE ENTER ADDRESS f4 DIAL OPTIONS 7 ZAN TI STREAM 1 FO RCED ON 2 0 FF OOS ONLY 3 OFF TEST ONLY 4 0 FF TEST 4005 9 TR OPTIONS A SR OPTIONS B SECO N DARY RATE Figure 6 10 Setting Data Set Ready SR Options Table 6 I shows the AT commands for setting SR options 61200
58. e DSU III DBU is equipped with a dial backup option the DBU Connection option appears as one of the Test menu selections This test allows the dial backup network to be tested while data is transmitted on the main line When this option is selected choose a stored number or enter a number to dial After establishing DBU connection the DSU III DBU designated at the answer unit is placed into loopback and a test pattern is transmitted from the originate unit to the answer unit Receive data is checked for errors and the results displayed on the front panel While running this test errors may be injected by pressing 2 and cleared by pressing 1 During the DBU test the LEDs scan back and forth and the Test LED is On When running at a subrate over a 56k or 64k loop or a 64k loop with Scrambler activated the DSU will not send data during a DBU test The DBU Answer Test option must be enabled Enabling DBU Answer test does not affect the unit during dial backup LO CAL REM O TE DSU CSU DSU CSU DTE DTE Test Purpose 61200 037L1 1 Answer Orig Figure 11 18 DBU Connection Test The purpose of this test is to verify the DBU circuit and DBU modules in both the local and remote DSU III DBU are function ing properly DSU Ill DBU User Manual 99 Chapter 11 Testing and Troubleshooting Initiating Follow the menu path outlined in Figure 11 20 to place a
59. e used the call is disconnected Reliable V 42 LAPM or MNP operation Uses either V 42 6 Rel V 42 MNP N5 LAPM or MNP error control If neither can be used the call is disconnected 7 Auto Auto Reliable V 42 LAPM or MNP operation Tries to use V 42 MNP N6 V 42 LAPM error control first and MNP error control next If neither can be used then N ormal operation is used Flow Control Flow control disabled 2 XON XO FF Enables XO n XO ff flow control CTS Only Enables CTS flow control from DCE 4 RTS CTS Enables CTS flow control from DCE and RTS from DTE 5 UN XON XOFF Q4 Unidirectional XO n XO ff Compression Compression disabled 2 Enabled Compression enabled 61200 037L1 1 DSU Ill DBU User Manual 67 Chapter 8 Configuring Dial O ptions DBU Options for ISDN DBU Passcode 68 Switch Type This option selects the type of telco CO switch providing the ISDN service There are three options for ISDN switch types e AT amp T 5ESS e NT DMS 100 National ISDN1 The dial backup passcode adds an additional level of security to the DSU III DBU A passcode of one to ten characters can be programmed into the unit When a dial backup connection is established the originate unit transmits a pre programmed passcode to the answer unit over the dial backup connection before the connection is considered valid The answer unit compares the received passcode to a pre programmed passcode If the passcode matche
60. eference to fire dangers and other hazards to life UL 1459 A UL rating that assures the connected equipment DSU CSU provides protection from current overloads and power line crosses V 25 bis Automatic calling and answering command set including the ability to work with async bisync and HDLC devices Provides a small subset of the functions of the Hayes Standard AT Command Set V 32 bis Higher speed CCITT standard for full duplex transmission on two wire leased and dial up lines at 4 8 7 2 9 6 12 and 14 4 kbps They do not rely on compression to achieve that high speed V 34 Latest high speed CCITT standard for full duplex transmission on two wire leased and dial up lines at the following rates 2 4 4 8 7 2 9 6 12 14 4 16 8 19 2 21 6 24 26 4 and 28 8 kbps without compression The maximum connection rate between two V 34 modems is 28 8 kbps Occasionally connections occur at 26 4 24 and 21 6 kbps because line quality differs from one call to the next V FC V Fast Class Proprietary modulation scheme developed by Rockwell International for data communication speeds up to 28 8 kbps VT 100 A non intelligent terminal or terminal emulation mode used for asynchronous communications 61200 037114 DSU Ill DBU User Manual 125 Glossary 126 DSU Ill DBU User Manual 61200 037L1 1 Index Symbols 1B D basic rate ISDN 5 2 W ire Switched 56 4 5 119 2047 119 4 W ire Switched 56 4 119 511 119 A all
61. el Rate Select 0 106 DSU Ill DBU User Manual 61200 037L1 1 Appendix A AT Commands Table A A Contd AT Commands cont ETS AT T5 amp T7 Remote test using stress PTRN 4 AT TO amp T8 Local test using 2047 pattern AT T1 amp T8 Local test using 511 pattern 61200 037L1 1 DSU Ill DBU User Manual 107 Appendix A AT Commands 108 DSU Ill DBU User Manual 61200 037L1 1 Appendix B Default Configuration Profiles The DSU III DBU contains four different user profiles sets of configurations options stored in read only memory see Table B A The unit is shipped from the factory with profile 1 loaded into the nonvolatile configuration memory See the chapters Installation and Manual Command for more information Profile 1 Profile 1 is configured for a 56 kbps synchronous point to point or dial up operation with a V 35 connector Automatic DBU has been disabled for this configuration profile Profile 2 Use profile 2 for a 56 kbps asynchronous point to point or dial up operation with an EIA 232 connector Automatic DBU has been disabled for this configuration profile Profiles 3 and 4 Profiles 3 and 4 are used for enabling dial backup using two DSU III DBU units One unit must be set for Answer and the other for Originate Use profile 3 to set the remote unit to Answer and profile 4 to set the host unit to Originate 61200 037L1 1 DSU Ill DBU User Manual 109 Appendix B Default Configuration Prof
62. ently busy and cannot be connected ISDN only The unit is dialing the selected number The DSU III DBU is entering dial backup mode Messages are not being transmitted but the service is immediately available for use Incoming call messages being received The DSU III DBU is currently in dial backup mode Sealing current detected but no data signal received from telco Switched 56 provider encountered a service problem 4 Wire SW56 only No dial backup option installed in the DSU III DBU Out of service signal or out of frame condition exists The call cannot be completed because the called terminal or the called terminal s access line is out of service or is faulty 2 wire and 4 wire SW56 only The physical connection to the backup line has been broken 2 wire and 4 wire SW56 only Remote end initiated a test DSU Ill DBU User Manual 73 Chapter 10 Status 74 Test From Telco DBU Test Pattern Waiting for Call DSU Operation and Network Status The network provider has activated the CSU loopback 2 wire and 4 wire SW56 only The DSU III DBU is currently performing a test with a pattern The originating DSU III DBU is waiting on a call from the remote end Current DSU III DBU Status This display line see Figure 10 1 indicates current DSU III DBU status Possible messages are Data Mode Unit in Test In data mode the data set ready SR and request to send RTS circuits are o
63. enu Submenu items appear two at a time in a circular or wrapping fashion When the submenu items are scrolled they continuously appear from beginning to end in a forward Down Arrow or reverse Up Arrow pattern LED Description The DSU III DBU has seven LED indicators RS CS TD RD CD ALM and TST These LEDs are identified as follows RS Request to Send Reflects the status of the request to send pin of the ELA 232 connector CS Clear to Send Reflects the status of the clear to send pin of the ELA 232 connector TD Transmit Data This LED is active when data is trans mitted from the DTE RD Receive Data This LED is active when data is received from the network DSU Ill DBU User Manual 25 Chapter 3 Operation CD Carrier Detect This LED is active when frame synchro nization is achieved and the DSU III DBU is ready to transfer data ALM Alarm Indication This LED activates whenever an alarm condition exists Alarm conditions include Open loop on network No frame synchronization Unit in dial backup Problem on dial backup line TST Test Mode This LED is on whenever the unit is in test mode REAR PANEL The rear panel contains three DTE connectors which provide primary channel V 35 or EIA 232 and a secondary channel EIA 232 port auxiliary EIA 232 An 8 pin telco jack a captive power cord and a power switch are also located on the rear panel Pin assignments for the DTE and network connection
64. est single bit errors can be injected into the transmitted test pattern by pressing 2 These errors appear on the TEST ERR display 61200 037L1 1 DSU Ill DBU User Manual 93 Chapter 11 Testing and Troubleshooting Test Pattern The Test Pattern option converts the local DSU III DBU into a BERT tester for the purpose of testing the DDS circuit If this test is used the remote DSU CSU must be in loopback or transmit ting a test pattern Figure 11 13 illustrates the data paths for this mode LO CAL REM O TE DSU CSU DSU CSU Test Purpose 94 Figure 11 13 Test Pattern Only Testing using a test pattern is used for the following purposes Transmits user selected test pattern using an internal test pattern generator and compares the received data using internal test pattern detector to detect if there are any errors on the DDS circuit Injects errors and verifies the unit transmits data across the communication circuit to the remote unit Helps determine from which direction the circuit is receiving errors DSU Ill DBU User Manual 61200 037L1 1 Chapter 11 Testing and Troubleshooting Initiating Follow the menu path outlined in Figure 11 14 to initiate a test using a test pattern 1 DTE amp LO O P LL 2 10 OP ONLY RT 122047 PATTERN 2 511 PATTERN 3 STRESS PTRN 1 4 STRESS PTRN 2 5 STRESS PTRN 3 6 STRESS PTRN 4 1 LOCAL UNIT 2 REM OTE UNIT 3 DBU CONNECTION Figure
65. f connection In some cases the company s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly telephone extension cord The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecom munications company cause to request the user to disconnect the equipment Users should ensure for their own protection that the electrical ground connec tions of the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution may be particularly important in rural areas Caution Users should not attempt to make such connections themselves but should contact the appropriate electric inspection authority or an electrician as appropriate The Load Number LN assigned to each terminal device denotes the percentage of the total load to be connected to a telephone loop which is used by the device to prevent overloading The termination on a loop may consist of any combina tion of devices subject only to the requirement that the total of the Load Num bers of all devices does not exceed 100 ISDN Service Ordering Information for the AD
66. ge return ASCII 013 but it can be changed by writing a different value to register 53 Before the terminating character is transmitted the command line can be edited by using the backspace character ASCII 008 to erase errors so the proper commands can be entered Valid AT commands for the DSU III DBU are listed in the appen dix AT Commands DSU Ill DBU User Manual 61200 037L1 1 Chapter 2 Installation V 25 bis Commands SDLC Option Bi Sync Option 61200 037L1 1 When configured for the V 25 bis option the DSU III DBU accepts in band dialing and configuration commands from both synchronous and asynchronous DTE ports The V 25 bis option supports the following protocols e SDLC Bi Sync Asynchronous Character Format Data bits 8 Parity bit Ignored Command Structure F A C V 25 bis COMMAND FCS F The address field A is FFH The control field C is set to 13H except for cases of multi frame responses For this case the control field is set to 03H in all but the last frame The 03H in the control field indicates that other frames are to follow while the 13H in the control field indicates the final frame Character Format Data bits 7 Parity bit Odd Command Structure SYN SYN STX V 25 bis COMMAND ETX DSU Ill DBU User Manual 17 Chapter 2 Installation 18 Asynchronous Option Character Format e Start bit 1 Data bits 7 Parity bit Even e Stop bit
67. he current test and returns to the Main menu Display Status Reenters test display 61200 037L1 1 DSU Ill DBU User Manual 79 Chapter 11 Testing and Troubleshooting 1 DTE amp LOO P LL 2 LO OP ONLY RT 3 DTE ONLY STATUS DISPLAY 1 EXIT TEST PLAY STATUS TEST STATUS DISPLAY STATUS DISPLAY 2 DISPLAY STATUS 1 EXIT TEST 2 DISPLAY STATUS 4 DTE WITH TP 5 TEST PATTERN STATUS DISPLAY 1 EXIT TEST 2 DISPLAY STATUS 1 EXIT TEST STATUS DISPLAY 2 DISPLAY STATUS 1 LO CAL UNIT 6 SELF TEST STATUS D EN TER TEST UNIT ADDRESS 0 1 2047 PATTERN 3 STRESS PTRN 1 4 STRESS PTRN 2 STATUS DISPLAY 1 EXIT TEST 2 DISPLAY STATUS 3 DBU CONNECTION DIAL STO RED 5 STRESS PTRN 3 6 STRESS PTRN 4 7 DATA FROM DTE EN TER DIAL 80 DSU Ill DBU User Manual Figure 11 4 Complete Test Menu 61200 037L1 1 Chapter 11 Testing and Troubleshooting TROUBLESHOOTING This section is intended to provide a quick and easy means of diagnosing suspected problems associated with local or remotely attached ADTRAN DSU CSUs Messages from the DSU CSU Messages on the LCD display and LEDs display information concerning the status of the unit and the local loop If the Alarm LED is On one or more of the messages shown in Table 11 A is displayed on the LCD The Status
68. hern Telecom DMS 100 request a Point to Point Multi Point line with the following features Line Type Basic Rate Functional Electronic Key Telephone Sets EKTS No Call Appearance Handling CACH No Non Initializing Terminal No Circuit Switched Service Yes Packet Switched Service No TEI Dynamic Bearer Service Circuit Switched voice and data permitted on any B channel packet mode data not permitted Table of Contents Chapter 1 Introduction Product OVERVIEW saca ilaele eed e v e ER Pereira 1 DDS Operation M 3 Dial Backup Operation aine aeree rmi iraniana 4 Dial Backup Options ecran meme torr n rent iii 4 4 Wire Switched 56 Backup Option 4 2 Wire Switched 56 Backup Option i retten ttr rnt eie 4 V 32 bis Backup Option cie ian etnies ire pee er TRECE HE PH E i V 34 Backup Option aperire rere pet Pee ria 5 1B D Basic Rate ISDN Backup Option ss 5 Entering Dial Backup Mode netter iraniani 5 Operation During Critical Times ucraina iii 5 Loss of Sealing Current ses 5 Outof Service OOS Signal sissies ricrea iaia 6 N Receive Signal sise rennen ee e resti refert tertie rd 6 All 1s or all 0s Condition ie ere iaia 6 Operation During Noncritical Times iii 6 Conditions for Returning to the DDS Circuit 6 Warranty and Customer Service uestre bite rr en Hh Potest ehe een redeat 7 Chapter 2 Installation Unpack Inspect Power Ups 9 Rece
69. iles Table B A Default Configuration Profiles Manual Command scape Character 43 2BH 43 2BH 43 2BH 43 2 BH R Character 13 0DH 13 0DH 13 0DH 13 0DH 10 0AH 10 0AH a eee Ses eee 50 32H 50 32H 50 32H 50 32H Enable Enable Enable Enable Long Long 2047 2047 Short Short 3 3 3 e DTR Command Timeout x100 Enable Disable AUTO e O Enable From Network DTE Options DTE Options nm nn nt 56k 57 6k Oo 4 o o in m gt wn mm O O 56k 57 6k 56k 57 6k V 35 SYNC N ormal Follow RS Timer O ff N ormal Ignored SO ff Test 005 Off TesttOOS Off TesttO0S OFF 110 DSU Ill DBU User Manual 61200 037L1 1 Appendix B Default Configuration Profiles Table B A Cont d Default Configuration Profiles pL Profile Numbers L 00 1 01 2 02 034 Test Options Test Options O Controlled RLB DBU Answer Test Disable Enable DBU Number to Dial DBU Originate Answer O riginate Enable Enable DBU when No Sealing Current Enable DBU Auto Restore Timer 1 minute DBU Redial Counter DBU Fail Timer x10 seconds DBU Redial W ait Time Disable Error Control Auto Auto Auto Auto V 42 MNP V 42 MNP V 42 MNP V 42 MNP Flow Control V 32 CTS Only CTS Only CTS Only CTS Only Data Compression V 32 Enabled Enabled Enabled Enabled g m o lo t o gt n 1 5 3 Automatic DBU DBU when OOS DBU when No RX Signal W hen
70. ion RMA is required prior to returning equipment to ADTRAN For service RMA requests or further information contact one of the numbers listed on the inside back cover of this manual DSU Ill DBU User Manual 7 Chapter 1 Introduction 8 DSU Ill DBU User Manual 61200 037L1 1 Chapter 2 Installation UNPACK INSPECT POWER UP Receipt Inspection Carefully inspect the DSU III DBU for any shipping damage If damage is suspected file a claim immediately with the carrier and contact ADTRAN Customer Service If possible keep the original shipping container for use in shipping the DSU III DBU for repair or for verification of damage during shipment ADTRAN Shipments Include The following items are included in ADTRAN shipments of the DSU III DBU e DSU HI DBU unit An 8 position modular to 8 position modular cable The user manual Appropriate cable for the backup option selected Customer Provides The customer must provide an EJA 232 interface cable with standard 25 pin male D type connectors Cannon or Cinch DB 19604 432 or a V 35 cable 61200 037L1 1 DSU Ill DBU User Manual 9 Chapter 2 Installation Power Up vy 4 CAUTION Each DSU unit is provided with a captive eight foot power cord terminated by a three prong plug which connects to a grounded 115 VAC power receptacle Power to the DSU must be provided from a grounded 115 VAC 60 Hz receptacle NETWORK INTERFACE CONNECTION 10 The DSU
71. ipt INSpectioni m M 9 ADTRAN Shipments Include urina 9 Customer Provides scsi etr ete e ner reins 9 Power Up i nienaceeevasn initia nti ai eife be kia e b t PEL EE Pe E eere Po ete 10 Network Interface Connection aa 10 DTE Data Connection Primary DTE tme titer tereti depen 11 Secondary Channel Connection trente are 13 Configuration acc oen tant tle i e ii hee enirn e terre dn 15 Configuration M th ds sniper 15 AT Commi ands nnci nente tete e IE Re tidied inne reins 16 V29 bis Commands iiec errem territi iii 17 SDLC OptlOD ac aene tera nieht een Ge e Ein hue e bi caries 17 Character Format iii 17 Command Structure ss nina 17 61200 037L1 1 DSU Ill DBU User Manual i Table of Contents BizSync OPHOM ance eee minis seite Tere teers errr eer 17 Character Format sa aaa ear 17 Command Structure ce ore RU p bere dr erre e EE 17 Asynchronous OpbBOL ettet reete iii 18 Character Format 18 Command otfu ture i cicala 18 Command Descriptions eee piam Tu Linea alan 18 Syntax and Possible Responses i 19 CNL Configuration Local ici 19 CNR Configuration Remote ss 19 Remote Command fari ip tats ai dm de ipo ann 19 Chapter 3 Operation Menu SEP CHIPS ED aaa 21 h ET E EET 21 rp R 21 Tests aaa iaia te bete 22 Configuration CONFPFIG tarte tren nete erre 22 Dialisi Re N T 22 Basic Menu
72. k esses 56 Figure7 3 EIA Local Loopback Options 57 Figure 7 4 EIA Remote Loopback Options 57 Figure 7 5 DBU Answer Test Option 58 Figure 8 1 Dial Backup Options reote ane e Re A A EIE Rena 60 Figure8 2 Editing Stored Phone Numbers iii 61 Figure 9 1 Dial Options Menuires nee me doa teet papel 69 Figure 10 1 Status Display 7 Figure 11 1 Normal Operation Before Initiating Loopback Test 77 Figure 11 2 Initiating a Test sese 78 Figure 11 3 Sample Test Status Displays sss 79 Figure 11 4 Complete Test Metu etre inem teer n n 80 Figure 11 5 DTE amp Loop Test ss 86 Figure 11 6 Initiating a DTE amp Loop Test sess 87 Figure 11 7 Loop Only Test ie miei ini 88 Figure 11 8 Initiating a Loop Only Tests resres seriea ieseni RESET n ERRE 89 Figure 11 9 DTE Only Test Diagram iacente alain 90 Figure 11 10 Initiating a DTE Only Test 91 Figure 11 11 DTE with Test Patterns ern eene tree tnnt peta stones 92 Figure 11 12 Initiating a DTE with Test and Test Pattern 93 Figure 11 13 Test Pattern Only arcieri nea 94 Figure 11 14 Initiating a Test Using a Test Pattern i 95 Figure 11 15 Initiating a Self Test 96 Figure 11 16 V 54 RDL with Test Pattern i 97 Figure 11 17 Initiating a Remote Test 98 Figure 11 18 DBU Connection Test 99 Figure 11 19 Initiating a DBU Connection Te
73. lation AT Commands 16 In addition to the front panel the DSU III DBU can be config ured and controlled with in band AT commands from an asyn chronous DTE port just as modems are To exit the data mode and enter the command mode the asyn chronous DTE device must transmit a proper escape sequence of three pluses to the DSU III DBU A specified time delay must occur between the last data character and the first escape sequence character This is the guard time delay and it can be changed by writing a value to the 512 register The default value for the guard time is one second For a valid escape sequence to occur the DTE must transmit the escape code character three times in succession with delay between each character being less than the guard time Once the command mode is entered AT commands can be transmitted to the DSU III DBU to configure most of the options or initiate tests to check both the DSU III DBU and the network connections All command lines must begin with the AT charac ter set in either capital or lower case letters The command line may contain a single command or a series of commands after the AT attention code When a series of com mands is used the individual commands may be separated with spaces for readability The maximum length for a command line is 40 characters Each command line is executed by the DSU III DBU upon receipt of a terminating character The default terminating character is a carria
74. levant information for the network and DTE interfaces It displays the current operating data mode loop status DTE data rate and format and DTE interface lead status The system returns to the status display when idle DSU Ill DBU User Manual 21 Chapter 3 Operation Test Test is used to control local and remote testing Select local or remote testing and the type of test and test pattern when required Configuration CONFIG Configuration is used to select network and DTE operating parameters When certain loop rates 56 or 64 kbps are selected a scramble option submenu is displayed instead of the DTE Rate menu to control scrambling Dial Dial provides manual dialing functions Key in a number to dial or select one of the ten stored numbers Basic Menu Navigation 22 Four function keys on the left side of the DSU III DBU keypad allow the various menu branches to be entered exited and scrolled through The four function keys are defined below Enter Selects a displayed item Up Arrow Scrolls up a menu tree Down Arrow Scrolls down a menu tree Cancel Exits back one level from the current branch of the menu To choose a menu item press the corresponding number or alpha character on the keypad press Shift to activate menu items with alpha selections The item flashes on and off to show it is the currently selected active choice Pressing either the Up or Down Arrow scrolls through the available menu items
75. line 70 SW 56 DBU status 72 switch type 68 switched 124 synchronous operation 77 T tail circuit 125 61200 037L1 1 Index telco jack 26 temperature 118 test 22 75 DTE only 90 loop only 88 self 96 test pattern 94 test commands 84 AT commands 105 test from telco 74 test menu 80 test mode manual 26 test options 29 configuration 55 58 test pattern 94 AT command 106 test pattern type 110 test timeout 56 110 TRoption 110 transmit clock 45 115 AT command 45 105 timing source 110 transmitdata 25 U U interface 125 UL 125 UL1459 125 unit dialing options 29 unitin test 74 unit testoptions 29 up arrow 22 25 V V 25 bis 125 V 25 bis commands 17 77 asynchronous option 18 bi sync option 17 SDLC option 17 DSU Ill DBU User Manual 133 Index V 32 bis 125 V 32 bis backup option 4 V 32 bis 42 bis 1 4 V 32 DBU status 72 V 34 1 5 10 66 125 DBU status 72 V 35 connector 11 13 pin assignments 13 V FC V Fast Class 125 VALA 18 view current configuration AT command 105 VT100 125 W wait to redial 65 AT commands 65 waiting for call 74 75 when out of service O O S 63 write to S register 105 134 DSU Ill DBU User Manual 61200 037L1 1 Product Support Information Presales Inquiries and Applications Support Please contact your local distributor ADTRAN Applications Engineering or ADTRAN Sales Applications Engineering 800 615 1176 Sales 800 827 0807 Post
76. ly to cause harmful interference in which case the user will be required to correct the interfer ence at his own expense Shielded cables must be used with this unit to ensure compliance with Class A FCC limits Change or modifications to this unit not expressly approved by the Y t4 party responsible for compliance could void the user s authority to operate the equipment CANADIAN EMISSIONS REQUIREMENTS This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus as set out in the interference causing equipment standard entitled Digital Apparatus ICES 003 of the Department of Communications Cet appareil nuerique respecte les limites de bruits radioelectriques applicables aux appareils numeriques de Class A prescrites dans la norme sur le materiel brouilleur Appareils Numeriques NMB 003 edictee par le ministre des Communications CANADIAN EQUIPMENT LIMITATIONS Notice The Canadian Industry and Science Canada label identifies certified equipment This certification means that the equipment meets certain telecom munications network protective operational and safety requirements The Department does not guarantee the equipment will operate to the user s satisfac tion Before installing this equipment users should ensure that it is permissible to be connected to the facilities of the local telecommunications company The equip ment must also be installed using an acceptable method o
77. mand is used to pass AT commands over the network to the remote DSU via the V 25 bis command processor This allows a remote DSU III DBU to be configured from a synchro nous interface The format of this command follows CNR REMOTE PASSWORD AT ONE OR MORE AT COMMANDS The remote password may or may not be required depending on the present configuration of the remote unit Responses to the CNR commands are returned in the data format currently configured Possible responses include VAL and INVAn Remote Command The DSU III DBU can be controlled remotely from another DSU III DBU The Configuration CONFIG menu allows the DSU III DBU remote configuration capability to be enabled or disabled For more information see the chapter Configuration Overview 61200 037L1 1 DSU Ill DBU User Manual 19 Chapter 2 Installation 20 DSU Ill DBU User Manual 61200 037L1 1 Chapter 3 Operation MENU STRUCTURE Main Menu 61200 037L1 1 The DSU III DBU uses a multilevel menu approach to access its many features All menu operations are displayed in the LCD window The opening menu is the access point to all other operations Each Main menu item has several functions and submenus to identify and access specific parameters LCD display of the Main menu 1 STATUS 2 TEST 3 CONFIG 4 DIAL There are four branches of the main menu Status Test Configu ration CONFIG and Dial Status Status is used to display all re
78. menu must be selected in order for the unit to display status messages Pressing Quick returns to the Main menu where STATUS can be selected Table 11 A Messages from the DSU CSU Good local loop signal Indicates good local No action required being received from unit properly LOOP IS NORMAL iie telco connected to telco circuit Unit not receiving a Bad telco cable from Replace telco cable signal from the telco the DSU to telco jack from DSU to wall jack SEE IBOE or bad circuit to telco If a problem persists contact telco provider Unit detects sealing Bad conductor in telco Replace telco cable current but no data cable from DSU to from DSU to wall jack signal from telco telco jack or bad If a problem persists circuit to telco contact telco provider Unit detects an outof Telco is having Check remote unit service or outofframe problems with DDS Contact telco service ROM NET condition from the circuit or remote unit provider telco is turned off or disconnected Transmit receive pair Telco wall jack wired Switch wire pairs in CHECK TELCO LINE reversal detected incorrectly wall jack or contact telco service provider TEST FROM reco og activated a W ait until test is TEST FROM TELCO loopback to test the complete or contact DDS circuit telco service provider 61200 037L1 1 DSU Ill DBU User Manual 81 Chapter 11 Testing and Troubleshooting Troubleshooting New Installs Before initiating diag
79. n and the DSU III DBU is ready to send data The DSU III DBU is currently in test mode use the Arrows to scroll through the menus to display the type of test being performed Current DDS Network Status This display line see Figure 10 1 displays the status of the main telco line For normal operation this should display LOOP IS NORMAL other possible messages are described as follows Answering Call Check Telco Going To DBU The DSU III DBU detects an incoming call The transmit and receive Tx Rx pairs of the loop connection are reversed The pairs should be swapped for normal operation This message is displayed briefly while switching from the dedicated service to dial backup mode DSU Ill DBU User Manual 61200 037L1 1 In Dial Backup LL Test From Telco Loop is Normal OOS OOF Open Loop Waiting for Call DTE Control Leads and Status Chapter 10 Status The DSU is in dial backup mode An LL test has been initiated from the telco The DSU is connected to the dedicated line The telco is transmitting an out of service code The DDS physical connection has been broken The DBU module is waiting for a call Four additional DTE interface leads are displayed with their current status on or off displayed below The leads are identi fied as follows TR Data terminal ready SR Data set ready LLB Local loopback RLB Remote loopback 61200 037114 DSU Ill DBU User Manual 7
80. ndard for autodialing FCC Part 15 of Class A Radiated and conducted emissions standards set for commercial and industrial use FCC Part 15 of Class B Radiated and conducted emissions standards set for residential use FCC Part 68 FCC rules and regulations intended to provide protection of the telephone network from harm caused by connection of equipment to the network in band Signaling dialing diagnostics management configuration etc over the same channel used for data 122 DSU Ill DBU User Manual 61200 037L1 1 Glossary ISDN Integrated Services Digital Network A network architecture that enables end to end digital connections The network supports diverse services through integrated access arrangements and defines a limited set of standard multipurpose interfaces for equipment vendors network providers and customers Interworking with a public switched telephone network is retained local DTE and loop test A test initiated by the user that loops the DSU to the central office and back This is used to test the local DSU s DTE and local loop multidrop A communications arrangement in which multiple devices share a common transmission channel although only one may transmit at a time out of band Signaling that is separated from the channel carrying information voice data video etc Typically the separation is accomplished by a filter The signaling includes dialing and other supervisory signals private net
81. nostics on a newly installed unit and or DDS circuit and before contacting ADTRAN Technical Support please check the items in Table 11 B to ensure the unit is config ured properly After verifying the items listed in Table 11 B the unit should operate properly and display the following DATA MODE LOOP IS NORMAL If a status message other than DATA MODE LOOP IS NOR MAL is shown begin performing diagnostics described in the section Test Sequence for Troubleshooting New Installs or Existing Circuits Table 11 B Troubleshooting New Installs Configuration Select the type of DTE interface option to DTE Type RS 232 or V 35 connect to the DSU CSU from the configuration menu Select the DDS loop rate of the DDS circuit Loop Rate Auto 2 4 to 64 kbps from the configuration menu Data Format async ar Syne RT to be used from the Verify DTE cable connection to the proper DTE Cable DTE connector on the DSU CSU N A Verify the telco cable is securely connected to Telco Cable na dee DSU CSU and wall jack Power the unit N A Verify the unit passes self test during power Off and then On up displayed on the LCD 82 DSU Ill DBU User Manual 61200 037L1 1 Chapter 11 Testing and Troubleshooting Test Sequence for Troubleshooting New Installs or Existing Circuits NOTE 61200 037L1 1 If your DSU is suspected of having problems perform a Self Test to determine if the unit is in good health If your DSU is receiving ex
82. nu 102 DSU Ill DBU User Manual 61200 037L1 1 61200 037L1 1 Chapter 12 Manual Command Table 12 A Manual Commands Command Description Command Value AT Command Echo Disable 82 00 AT Result code __ enable 85 00 AT Long or Short code Shortform Numeric 86 00 tong form Verbose 86 o AT LF Character 4 oowrr Load Factory Opt o P Op onSet l 8A 00 Network Address tok Network Adar Unlock S C3 00 Front Panel En Dis P Disable AA 00 DSU Ill DBU User Manual 103 Chapter 12 Manual Command 104 DSU Ill DBU User Manual 61200 037L1 1 Appendix A AT Commands Table A A shows the AT commands available for the DSU III DBU Table A A AT Commands ATQn Result Code Display 0 ATZ AT amp Cn DCD Option 0 AT amp Dn DTROpion 1 0 e IAT amp Ln Network Typ 0 AT amp Qn DTE Data Format 0 AT amp Rn CS Options 0 AT amp Sn SROp on 0 AT amp Th jTestCommands 0 61200 037L1 1 DSU Ill DBU User Manual 105 Appendix A AT Commands Table A A Contd AT Commands toni eC none Inactivity Timer Compress O ption V 32 DBU AT P ATP x THP gt X ATYRX ATYTh AT An AT Bn AT Cn AT Dn AT En AT Fn AT Gn AT Hn AT In AT Jn AT Kn AT ln AT N xx AT Pn AT RR Clock Source Select Secondary Chann
83. on may be required when applying to the local telephone company for a dial up line for the V 34 or V 32 Service REN FIC USOC Type Loop Start V 32 0 3B 02LS2 RJ 11C Loop Start V 34 0 8B 02LS2 RJ 11C The REN is useful in determining the quantity of devices you may connect to your telephone line and still have all of those devices ring when your number is called In most areas the sum of the RENS of all devices should not exceed five To be certain of the number of devices you may connect to your line as determined by the REN call your telephone company to determine the maximum REN for your calling area 10 This equipment may not be used on coin service provided by the telephone company Connection to party lines is subject to state tarriffs Contact your state public utility commission or corporation commission for information FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT 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 reason able 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 frequencies Operation of this equipment in a residential area is like
84. onnector is recommended for use with data rates above 19 2 kbps The EIA 232 connector works up to 56 kbps with a low capacitance cable or with the external transmit clock option selected The primary DTE rate is configured from the front panel The primary DTE equipment can operate in asyn chronous or synchronous modes To prevent possible radio frequency interference emissions a shielded cable is required DSU Ill DBU User Manual 11 Chapter 2 Installation 12 Table 2 C Pin Assignments for Primary EIA 232 Connector CC CF rotective Ground PG Transmit Data SD S ignal Ground SG Receive Clock RC DSU Ill DBU User Manual 61200 037L1 1 Chapter 2 Installation Table 2 D Pin Assignments for Primary V 35 Connector cal Loopback LL mote Loopback RL eceived Data RD A eceived Data RD B eceiver Signal Element Timing SCRA eceiver Signal Element Timing SCR B ransmitted Data SD A ransmitted Data SD B ansmitter Signal Element Timing SCT Transmitter Signal Element Timing SCT External TX Signal Element SC X A External TX Signal Element SC X B est Indicator TI SECONDARY CHANNEL CONNECTION If used the secondary DTE should be connected to the auxiliary EIA 232 connector The pinout for the connector is shown in Table 2 E 61200 037L1 1 DSU Ill DBU User Manual 13 Chapter 2 Installation 14 Table 2 E Pin Assignments for Auxiliary ELA 232 Connector Pin cent
85. op rate is selected the DTE rate automatically sets to match the slower loop rate the DSU III DBU briefly displays DTE RATE SAME AS THE NETWORK before returning to the status screen The factory default setting is SAME AS LOOP 61200 037L1 1 DSU Ill DBU User Manual 39 Chapter 6 Configuring DTE O ptions 56 kbps Loop Rate Secondary Channel 1 SCRAMBLER OFF 1 N ETW ORK OPT 2 SCRAMBLER ON 3 DATA IN VERT 1 DTE RATE 64 kbps Loop Rate or 56 kbps Loop Rate No Secondary Channel 1 2 4K 2 DTE OPTIONS 2 4 8K 2 CONNECTOR TYPE 3 9 6K 3 DATA FORMAT 4 19 2K 4 DTE CMD OPTION 5 38 4K 1 LOCAL 5 TRANSMIT CLOCK 6 56K 57 6K 1 SCRAMBLER OFF 6 CS OPTIONS 7 SAME AS LOOP 2 SCRAMBLER ON 3 CONFIG T ANTISTREAM 3 SUPPRESS LBE 2 REMOTE JENTER ADDRESS 8 CD OPTIONS 3 TEST OPTIONS 9 TR OPTIONS A SR OPTIONS B SECO N DARY RATE Figure 6 1 Selecting DTE Rates The AT commands for setting the DTE rate options are shown in Table 6 A 40 DSU Ill DBU User Manual 61200 037L1 1 vi CAUTION 61200 037L1 1 Chapter 6 Configuring DTE O ptions Table 6 A DTE Rate Options AT Commands Front AT logi 6 56K 57 6K ae DIE Tate 56K sync or 57 6K 7 SAME AS LOOP K9 DTE rate matches loop rate 1 SCRAMBLER OFA FO DTE data scrambler disabled 2 SCRAMBLER ON DTE data scrambler enabled DTE data invert enabled 56 kbps 3 DATA IN VERT F2 secondary channel loop rate only Suppresses loopback enable code LBE in transmit d
86. opback There are six test patterns to choose from or Data from the DTE may be selected LOCAL DTE Er DSU CSU a ti Ele poe Local Unit Initiates Test Figure 11 16 V 54 RDL with Test Pattern Test Purpose The test purpose is to test the local DSU the DDS circuit and the remote DSU 61200 037L1 1 DSU Ill DBU User Manual 97 Chapter 11 Testing and Troubleshooting Initiating Follow the menu path outlined in Figure 11 17 to place a remote DSU III DBU into loopback 1 2047 PATTERN 2 511 PATTERN 3 STRESS PTRN 1 4 STRESS PTRN 2 5 STRESS PTRN 3 6 STRESS PTRN 4 7 DATA FROM DTE 1210 CAL UNIT EN TER TEST UNIT ADDRESS 0 2 REMOTE UNIT 3 DBU CONN ECTION Figure 11 17 Initiating a Remote Test After selecting Remote Unit from the menu the following prompt is displayed for entering the address for the remote unit ENTER TEST UNIT ADDRESS XX Use the number keys to type the address of the remote DSU then press Enter The test pattern selections are displayed After a test pattern is selected the system briefly displays Please Wait Test Results If the test is successful the status menu is displayed If not Unable to Execute Test is displayed Interpreting Test Results If the unit is functioning properly the test error count should be 0 98 DSU Ill DBU User Manual 61200 037L1 1 Chapter 11 Testing and Troubleshooting DBU CONNECTION NOTE When th
87. ows the AT commands used to set the Network Options 61200 037L1 1 DSU Ill DBU User Manual 33 Chapter 5 Configuring Network Options 34 Table 5 A Network Options AT Commands Front Panel AT Command B0 b IS 9 8 Q o 3 3 D 5 2 n 4K no secondary channel 8K no secondary channel 6K no secondary channel 9 2K no secondary channel 8 4K no secondary channel 6K no secondary channel 4K clear channel 4K with secondary channel 8K with secondary channel 6K with secondary channel 9 2K with secondary channel 8 4K with secondary channel 6K with secondary channel Network Address X decimal x oj o o o wo SS SN SS SS m w w oo HE WINE x 3 o 9 O o 5 E a E ch o 3 z Il x x Disabled nabled eim o a amp n o c a M aster rom Network ejo DSU Ill DBU User Manual 61200 037L1 1 Loop Rate a AUTION 3 CONFIG 61200 037L1 1 1 LOCAL REMOTE ENTER ADDRESS 3 TEST OPTIONS Chapter 5 Configuring N etwork O ptions The Loop Rate option sets the loop operating speed The unit should be set to the rate required by the DDS Service The DSU III DBU also supports subrate DTE data over a 56 kbps loop The loop rate must be set independently of the DTE rate Eight loop rate selections are available shown in Figure 5 1 After selecting any loop rate other than Auto or 64 kbps the option for a secondary channel is available The secondary ch
88. power 118 power cord 27 power switch 27 powerup 10 primary DTE 11 primary EIA 232 27 primary V 35 27 private network master slaved to external clock 123 private network master clocking 123 private network tributary clocking 123 PSTN 123 132 DSU Ill DBU User Manual Q quick 25 R RDL 124 enable disable 110 re execute command AT command 105 read S register 105 rear panel 26 receipt inspection 9 receive RX signal 63 receive data 25 receiver sensitivity 118 redial counter 64 AT commands 65 remote command 19 remote configuration 29 124 enable disable 36 110 remote digital loopback RDL 56 remote loopback 75 77 remote V 54 test 124 rest AT command 105 restore factory options AT command 105 restore timer 64 result code 110 result code display 105 result code from ATcommand 105 return material authorization RMA 7 RJ45S 124 RTS CTS delay ATcommand 106 RX CTS delay 110 S S register 61200 037L1 1 read 105 write 105 scrambler 124 scrambler control AT command 106 scrambler mode 111 scrambler on option 41 scrambler on off factory default 41 sealing current 63 secondary channel 26 52 connection 13 rate 111 services 27 secondary rate 52 53 AT commands 53 factory default 52 self test 96 serial number AT command 106 service 124 shift 24 shortcode 110 SNMP 124 specifications 117 SR 124 SR options 110 AT command 105 status 21 71 DDS network 74 dial backup mode 72 stay on leased 70 stay on
89. r sync over the 56 kbps service Secondary channel operation is supported at all service rates up to 56 kbps providing terminal rates of 75 150 300 600 1200 and 2400 bps The secondary rates available depend on the service rate configured DSU Ill DBU User Manual 3 Chapter 1 Introduction DIAL BACKUP OPERATION There are five backup options available 4 wire SW56 2 wire SW56 V 32 bis 42 bis V 34 and 1B D ISDN Contact the local telco provider to determine which services are available Dial Backup Options 4 Wire Switched 56 Backup Option This dial up 4 wire DDS allows customers to pay for data connection only for the time the unit is active The regional operating companies provide the 4 wire local loop service to SW56 customers In SW56 mode the DSU III DBU supports DTE rates of 2 4 4 8 9 6 19 2 38 4 asynchronous or synchro nous and 56 kbps synchronous An additional DTE rate of 57 6 kbps is available in async modes 2 Wire Switched 56 Backup Option DATAPATH is a switched digital service offered under various service names by the local service provider The services are generally provided by the Northern Telecom DMS SL100 family of central office switches DATAPATH allows the customer to pay for high speed data transfer up to 56 kbps only when the unit is active The dial up service is delivered via a 2 wire local loop that can be up to 18 000 feet at a signal level of 45 dB V 32 bis Backup Option The V
90. r the Phone Number options If a clear channel 64 kbps circuit is required to back up the DDS circuit placing a 4 at the end of the SMART dial string phone number entered into stored number 1 8 establishes the backup connection at 64 kbps instead of 56 kbps For example 2059718000 4 Setting the Service Profile Identifier SPID For ISDN dial backup the service profile identifier SPID is stored in Stored Number 9 The SPID is a sequence of digits identifying ISDN terminal equipment to the ISDN switch when more than one ISDN set has been attached to the same central office line The SPID is assigned by the telco when the ISDN line is installed and normally resembles the phone number Only the AT amp T 5ESS switch is capable of recognizing a point to point configuration eliminating the need for a SPID All other switch types require a SPID 61200 037L1 1 DSU Ill DBU User Manual 61 Chapter 8 Configuring Dial O ptions Setting the Local Directory LOC Number For ISDN dial backup the LOC is stored in Stored Number 10 Table 8 A AT Commands for Storing Phone Numbers AT mm Store Phone N umber Enter SPID N umber for ISDN dial backup Edit LO C for ISDN dial backup 62 DSU Ill DBU User Manual 61200 037L1 1 Chapter 8 Configuring Dial O ptions DBU Options for All Models 61200 037L1 1 The DBU Options are used to select the modes of operation for the Dial Backup features There are ten standard options avail
91. r to select it A submenu item is invoked or a configu ration parameter is set The display of COMMAND AC CEPTED indicates a valid operation Numeric Keypad The numeric keypad contains the numbers 0 through 9 and alpha characters A through F which are used to activate menu items Numbers 0 through 9 are also used to enter parameters Shift Alpha characters are entered by pressing Shift before each desired character To activate a menu item designated by an alpha character rather than a number display the menu item using the Up and Down Arrows press and release Shift then press the letter Press Enter to select the item 24 DSU Ill DBU User Manual 61200 037L1 1 61200 037L1 1 Chapter 3 Operation If a key is pressed without using Shift the numbered item becomes active instead of the alpha item If this happens repeat the correct procedure Quick The Quick key used during most operations returns immedi ately to the Main menu During a test the Quick key displays the Exit Test screen During dial backup Quick displays a menu with options to Hang Up or Stay on the Line Cancel Cancel stops the current activity and returns to the previous menu Repeat until the desired menu level is reached When a submenu item is displayed press Cancel to exit the current display and return to the previous menu Repeat as necessary Up and Down Arrows Up and Down Arrows scroll through the submenu items avail able in the current m
92. re 11 2 shows the menu path for initiating a local DTE and Loop test 1 DTE amp LOOP LL 2 LO OP ONLY RT 3 DTE ONLY 4 DTE WITH TP 1 LOCAL UNIT 5 TEST PATTERN 6 SELF TEST 2 TEST 2 REMOTE UNIT EN TER TEST UNIT ADDRESS 0 3 DBU CONNECTION fIDIAL STORED ENTER DIAL Figure 11 2 Initiating a Test Once a test is initiated Please Wait is displayed briefly followed by the status screen 78 DSU Ill DBU User Manual 61200 037L1 1 Chapter 11 Testing and Troubleshooting Test Status Display The Test Status display appears automatically during a test The Test Status display is similar to the status screen described in the chapter Status with additional prompts for the type of test and the number of errors for tests with a test pattern Figure 11 3 shows an example of a Test Status Display for a test with a test pattern W hile this menu is on the display Press 1 to clear errors Press 2 to injectan error TEST PATTERN TST ERR 00 LOOP 56K Use the Up and Down arrows DTE 56K SYNC to display other status screens TR SR LIB RLB OFF OFF OFF OFF UNIT IN TEST LOOPISNORMAL Figure 11 3 Sample Test Status Displays Exiting a Test During a test press Quick to access the Exit Test Display Status menu or press Cancel to return to the Main menu The Exit Test Display Status menu provides the following options which are available only after a test has been initiated see Figure 11 4 Exit Test Exits t
93. s are listed in the chapter Installation The DSU III DBU rear panel is shown in Figure 3 3 26 DSU Ill DBU User Manual 61200 037L1 1 STMT LINE 1 1 EU 61200 037L1 1 AUXILIARY EIA 232 0000000000000 000000000000 PRIMARY EIA 232 000000000000 Chapter 3 Operation PRIMARY V 35 oo9009090 00000000 O O 55000000 O O 00000000 115 VAC 60HZ 15A Identification of Numbers Item Auxiliary EIA 232 Power Switch Line 1 Line 2 Primary EIA 232 Primary V 35 115 VAC Connection NOT RON Function Secondary channel services Used to turn power on or off Connection to the dedicated circuit Connection to dial backup DTE interface High speed DTE interface Power cord connection Figure 3 3 DSU III DBU Rear View DSU Ill DBU User Manual 27 Chapter 3 Operation 28 DSU Ill DBU User Manual 61200 037L1 1 Chapter 4 Configuration Overview LOCAL AND REMOTE CONFIGURATION 61200 037L1 1 The DSU III DBU can be configured locally using the front panel or communications can be established with a remote DSU so the front panel of the local DSU can be used to configure the remote DSU During remote configuration the DSU III DBU prompts for the remote address before displaying the Configuration menus The Configuration menu consists of a group of five submenus relating to a specific interface or function of the DSU III DBU that requires setup 1 Network Opt Network Interface
94. s the receive unit sends a Passcode OK message to the originate unit and goes on line If the passcode does not match the receive unit sends an Invalid Passcode message to the originate unit and terminates the dial backup connection If a passcode is not received by an answer unit with passcode enable or if the Passcode OK message is not received by an originate unit with passcode enable the dial backup connection is terminated DSU Ill DBU User Manual 61200 037L1 1 Chapter 9 Dial Options DIAL OPTIONS The dial options available in the dial menu 4 Dial vary whether the DSU III DBU is currently in dial backup mode or connected to the DDS line see Figure 9 1 Answer Unit Connected to DDS Line 1 DIAL BACKUP COMMAND ACCEPTED Originate Unit Connected to DDS Line 1 DIAL BACKUP 1 DIAL STO RED Select Stored Number 1 A 2 EN TER DIAL 2 STAY ON LEASED 3 DBU ONLINE TEST During Dial Backup 1 HANG UP 2 STAY ON LINE Figure 9 1 Dial Options Menu 61200 037L1 1 DSU Ill DBU User Manual 69 Chapter 9 Dial Options Answer Unit Connected to DDS Line Dial Backup The message COMMAND ACCEPTED is displayed and the DSU III DBU waits for an incoming call When an incoming call is detected the DSU III DBU answers the call and enters dial backup Originate Unit Connected to DDS Line Dial Backup The DSU III DBU prompts to dial a stored number or enter a number to dial for dial backup Sta
95. st ii 100 Figure 12 1 Manual Command ss 102 Figure C 1 DSU to Modem Interconnect ss 113 Figure D 1 BIA 232 Connector men aa 115 viii DSU Ill DBU User Manual 61200 037L1 1 Chapter 1 Introduction PRODUCT OVERVIEW 61200 037L1 1 The ADTRAN DSU III DBU dial backup data service unit provides a reliable high speed data connection for customer data terminal equipment DTE through digital data service DDS lines The DSU III DBU provides automatic dial backup of the dedicated circuit There are five backup options available 4 wire switched 56 SW56 2 wire SW56 V 32 bis 42 bis V 34 and 1B D ISDN The DSU III DBU supports both synchronous and asynchronous data communication over the DDS or DBU networks The DSU III DBU provides both V 35 and EIA 232 electrical and physical DTE interfaces to accommodate a variety of applica tions A second EIA 232 interface is provided if the unit is configured for use on DDS with secondary channel services To ensure a reliable connection the unit features an extended receiver capability which permits operation over long loops 3 4 miles or 5 5 km of 26 AWG at 56 kbps The 4 wire SW56 DBU model is compatible with AT amp T Accunet and Sprint SW56 type services The 2 wire SW56 DBU is com patible with DATAPATH type of SW56 services The V 32 bis 42 bis DBU and the V 34 DBU allow switched backup over the public switched telephone network PSTN The 1B D ISDN
96. te on the first line The DTE data rate and format as selected in configuration are shown on the second line DSU Ill DBU User Manual 71 Chapter 10 Status Dial Backup Information Type of Dial Backup Service This display line see Figure 10 1 indicates the type of dial backup service installed in the DSU III DBU The following messages are displayed according to the dial backup option installed in the DSU III DBU DU DBU Status ISDN DBU Status SW56 DBU Status V 32 DBU Status V 34 DBU Status DBU Status Not Installed 2 wire Switched 56 backup option in stalled 1 B D Basic Rate ISDN backup option installed 4 wire Switched 56 backup option installed V 32 backup option installed V 34 backup option installed No backup service option card installed in the DSU III DBU unit Current Status of Dial Backup Mode This display line see Figure 10 1 indicates the backup service status Possible messages include the following Answering Call Call Disconnect The DSU III DBU detected an incoming call message and is initiating call setup procedure Call disconnect message received from the remote end 72 DSU Ill DBU User Manual 61200 037L1 1 61200 037L1 1 Called Unit Busy Dialing Going to DBU Idle Incoming Call In Dial Backup No RX Signal No wink from CO Not Installed OOS OOF From Net Open Loop DBU Line in RDL Chapter 10 Status The unit called is curr
97. te Digital Loopback RL e terere ETE 56 ELA LU Birrae a E E EE 57 TA HE S 57 IOBU Answer TESE nn nin ri etico fees eo o C fe HO ERA EP eed 58 Chapter 8 Configuring Dial Options Dial OpPHONS nete ttr petere eite tene ede enna 59 Phone Number tees tet tate morata en eate pa aO ER Debe etat 61 ISDN Dial Backup temere e prenne ter peeing 61 Setting the Service Profile Identifier SPID sss 61 Setting the Local Directory LOC Number sss 62 DBU Options for All Models eroe pce enr entere t egent 63 Automatic DB terrere rente P tre oreet RES 63 Number to Dial auci asp lane 63 Originate ANSWEL iii 63 When Outofservice OOS uniche aaa 63 No Receive RX Signal ssiri aven 63 No 5ealing Current reed tee moet on E pint 63 Whern all 1 7082 nn AE retten sass eret wert et eee ety 64 Powell 64 Redal Counte t Zen ea gala 64 Fail Etfi cicero m E eta aie DO ncs ne 64 Wait to Redial ttr pr HER ERR rp praes 65 61200 037114 DSU Ill DBU User Manual iii Table of Contents DBU Options for 2 wire and 4 wire ui 66 Network TV Pe sms nine rene 66 DBU Options for V 32 bis and V 34 ui 66 Error COnttol E M 66 Blow COfittol sis css sa racer tera mairie enceinte re 66 COMPT SSION ss PEE EHI tete iet egets de become 66 DBU Options for ISDN oii nro ree tp ree Pete mi ener e ee ees 68 Switch TYPO e
98. ted while data is passing on the DDS In order for this test to be performed DBU Answer Test must be enabled on the remote unit If DBU Answer Test is not enabled the remote unit will not accept a DBU test from the other end 1 N ETW ORK TYPE 1 LOCAL 2 REMOTE ENTER ADDRESS 1 TEST TIMEOUT 2 RDL EN DIS 3 EIA LLB EN DIS 4 EIA RLB EN DIS 5 DBU ANS TEST 3 TEST OPTIONS 3 CONFIG 1 DISABLED Figure 7 5 DBU Answer Test Option 58 DSU Ill DBU User Manual 61200 037L1 1 Chapter 8 Configuring Dial Options DIAL OPTIONS The Dial Options menu stores up to ten phone numbers defines the dial backup operation when the DDS circuit fails and programs the passcode security feature of the DSU III DBU Figure 8 1 shows the full Dial Backup Options 4 Dial Options menu Shaded items are restricted to the specified DBU version 61200 037L1 1 DSU Ill DBU User Manual 59 Chapter 8 Configuring Dial O ptions 3 CONFIG 4 DIAL OPTIONS 60 1 PHONE NUMBER 2 DBU OPTIONS 3 DBU PASSCODE STO RED NUMBER TO EDIT 1 10 NNNNNNN ISDN Dial Backup EDIT SPID STO RED NUMBER 9 NUMBER NNNNNNN EDIT LOC STORED NUMBER 10 DIRECTORY NUM NNNNNNN 1 AUTOMATIC DBU 1 DISABLE 2 EN ABLED 2 N UM BER TO DIAL 1 DBU WITH 1 2 DBU WITH 2 3 0 RIGIN ANSWER 1 DBU OR 2 DBU ANSWER 4 W HEN OOS ISA BLED N ABLED 5 NO RX SGNL 1 DISA BLE 2 EN ABLED 6 NO SEAL CUR
99. work tributary clocking Clocking in which the timing is derived from the DDS loop private network master clocking Clocking in which timing is derived internally from the DSU private network master slaved to external clock Clocking in which timing is slaved to the DSU s external transmit clock PSTN Public switched telephone network A direct distance dialing telephone network that is available for public use The network is an integrated system of transmission and switching facilities signaling processors and associated operations support systems that is shared by customers PSTN also is called public network public switched network or public telephone network point to point A private circuit conversation or teleconference in which there is one person at each end usually connected by some dedicated transmission modem 61200 037L1 1 DSU Ill DBU User Manual 123 Glossary RDL Remote digital loopback remote configuration A feature designed into ADTRAN DSU CSU products that allow a remote DSU CSU to be configured from a local DSU CSU or VT 100 compatible terminal remote V 54 test A diagnostic feature that allows testing of the DDS circuit by looping the remote DSU CSU back to the local DSU CSU RJ 45S Registered jack 8 pin connector used for data transmission over standard telephone wire Single line 2 wire T R PR PC programmed data 8 position keyed scrambler A device that transposes or inverts signals or
100. y may make changes in its facilities equipment operations or procedures that could affect the proper operation of this equipment advance notification and the opportunity to maintain uninterrupted service is given If experiencing difficulty with this equipment please contact ADTRAN for repair and warranty information The telephone company may require this equipment to be disconnected from the network until the problem is corrected or it is certain the equipment is not malfunctioning This unit contains no user serviceable parts An FCC compliant telephone cord with a modular plug is provided with this equipment In addition an FCC compliant cable appropriate for the dial backup option ordered is provided with this equipment This equipment is designed to be connected to the telephone network or premises wiring using an FCC compatible modular jack which is Part 68 compliant The following information may be required when applying to the local telephone company for leased line facilities Service Digital Facility Service Order Network Type Interface Code Code Jacks 24 kbps Digital Interface 04DU524 6 0F RJ 485 4 8 kbps Digital Interface 04DU5 48 6 0F RJ 485 9 6 kbps Digital Interface 04DU5 96 6 0F RJ 48S 19 2 kbps Digital Interface 04DU5 19 6 0F RJ 485 38 4 kbps Digital Interface 04DU5 38 6 0F RJ 48S 56 kbps Digital Interface 04DU5 56 6 0F RJ 485 64 kbps Digital Interface 04DU5 64 6 0F RJ 485 The following informati
101. y on Leased The DSU III DBU remains on the leased line and does not enter dial backup mode DBU Online Test This option allows the dial backup connection to be tested manually without interrupting the data on the DDS A stored or manually entered number can be used DBU Answer Test must be enabled on the far end to perform a DBU on line test NOTE Dial Options During Dial Backup Hang Up Terminates the dial backup connection and attempts to reestab lish communication on the DDS line Stay On Line This DSU III DBU remains in dial backup mode and returns to the Main menu 70 DSU Ill DBU User Manual 61200 037L1 1 Chapter 10 Status STATUS This screen only displayed during test Network Rate DTE Rate and Data Format 61200 037L1 1 The status selection displays two lines of the current operational status of the network and the DTE interfaces After 30 seconds of no front panel operation the DSU III DBU automatically reverts to the Status display see Figure 10 1 DTE amp LOOP b Test being performed LOOP 64K 4 Network Rate SW 56 DBU STATUS OPEN LOOP 4 DTE Rate Data Format lt Dial Backup Mode gt gt DTE 9 6K SYNC UNIT IN TEST 4 Dial Backup Status lt DSU Operational Status OPEN LOOP lt DDS Network Status Figure 10 1 Status Display This display line see Figure 10 1 indicates the current loop ra

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