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Paradyne 7924 manual

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Table of contents for the manual

  • Page 1

    H OT W IRE MODEL 7924 ST ANDALONE T1 HDSL TERMINA TION UNIT USER’S GUIDE Document No. 7924-A2-GB20-30 October 1997[...]

  • Page 2

    Printed on recycled paper A 7924-A2-GB20-30 October 1997 Copyright  1997 Paradyne Corporation. All rights reserved. Printed in U.S.A. Notice This publication is protected by federal copyright law . No part of this publication may be copied or distributed, transmitted, transcribed, stored in a retrieval system, or translated into any human or com[...]

  • Page 3

    Important Information B 7924-A2-GB20-30 October 1997 Important Safety Instructions 1. Read and follow all warning notices and instructions marked on the product or included in the manual. 2. Do not allow anything to rest on the power cord and do not locate the product where persons will walk on the power cord. 3. Do not attempt to service this prod[...]

  • Page 4

    Important Information C 7924-A2-GB20-30 October 1997 EMI W arnings ! W ARNING: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial e[...]

  • Page 5

    i 7924-A2-GB20-30 October 1997 Contents About This Guide  Document Purpose and Intended Audience v . . . . . . . . . . . . . . . . . . . . . . . . .  Document Summary v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Product-Related Documents vi . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 6

    Contents ii 7924-A2-GB20-30 October 1997 5 Customizing V .35-Compatible Units  Accessing Configuration Options 5-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Making Changes from the T erminal Interface 5-2 . . . . . . . . . . . . . . . . . . . . . . .  Making Changes in Switchpack Mode 5-4 . . . . . . . . . . . . [...]

  • Page 7

    Contents iii 7924-A2-GB20-30 October 1997 B Cable Pin Assignments  T erminal Connection Cable Pin Assignments B-1 . . . . . . . . . . . . . . . . . . . . . . .  HDSL Loop Connection Cable Pin Assignments B-2 . . . . . . . . . . . . . . . . . . . . .  T1 Network Connection Cable Pin Assignments B-3 . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 8

    v 7924-A2-GB20-30 October 1997 About This Guide Document Purpose and Intended Audience This guide contains information needed to set up, configure, and operate HotWire Model 7924-A1 T1 HDSL termination units. It is designed for central office technicians or network engineers who have an understanding of the deployment of digital subscriber line sys[...]

  • Page 9

    About This Guide vi 7924-A2-GB20-30 October 1997 Section Description Chapter 6 Monitoring the Unit. Describes how to monitor unit status, LEDs, and network statistics. Also describes how to monitor the status of the unit on the opposite side of the HDSL connection. Chapter 7 T esting . Provides information about available loopback tests. Appendix A[...]

  • Page 10

    1-1 7924-A2-GB20-30 October 1997 About HotW ir e Model 7924 T ermination Units 1 HotW ir e 7924-A1 Models and Featur es Products in the HotWire 7924 family provide “last mile/last kilometer” transport of T1-compatible circuits between customer facilities and central site equipment over 2- or 4-wire copper lines. The units can be used over dista[...]

  • Page 11

    About HotWire Model 7924 T ermination Units 1-2 7924-A2-GB20-30 October 1997 There are several versions of the Model 7924-A1, each supporting a different interface (DSX-1 or V .35) and power supply (120 V ac, 230 V ac, or – 48 Vdc): Model Number Features 7924-A1-201 1.544 Mb/s DSX-1 compatible. Connection to 120 V ac power supply . 7924-A1-202 1.[...]

  • Page 12

    About HotWire Model 7924 T ermination Units 1-3 7924-A2-GB20-30 October 1997 T ypical Configurations HotWire Model 7924 standalone units can be used in campus applications where long loop distances normally require the campus to contract with the local telephone exchange carrier to deliver private line services across the campus. Figure 1-1 shows t[...]

  • Page 13

    About HotWire Model 7924 T ermination Units 1-4 7924-A2-GB20-30 October 1997 HotWire Model 7924 standalone units are also ideal for delivering T1 services from a central site to the customer premises over long loop distances without repeaters. Figure 1-2 shows a central-site application with a HotWire 7900 Nest containing HotWire Model 7924 nest ca[...]

  • Page 14

    About HotWire Model 7924 T ermination Units 1-5 7924-A2-GB20-30 October 1997 Cellular network providers must lease large numbers of T1 circuits in order to connect remote cell sites to mobile telephone switching offices (MTSOs). HotWire Model 7924 products provide an alternative to standard repeatered T1 services. Figure 1-3 depicts a typical cellu[...]

  • Page 15

    2-1 7924-A2-GB20-30 October 1997 Installing the Unit 2 Overview This chapter describes the procedure for installing a single standalone termination unit using a 120 V ac or 230 V ac power supply (Model 7924-A1-20x or 7924-A1-30x). If you have multiple standalone units at the same location, you may want to consider installing the units in a HotWire [...]

  • Page 16

    Installing the Unit 2-2 7924-A2-GB20-30 October 1997 Connecting to the Network  Procedur e 1. Connect one end of the supplied 14 ′ twisted-pair network cable into the rear panel HDSL jack. Connect the other end to your HDSL network interface. NOTE: Do not use a flat VF network cable, as this may severely degrade the performance of the terminat[...]

  • Page 17

    3-1 7924-A2-GB20-30 October 1997 Using T erminal and Switchpack Modes 3 Choosing an Interface Mode Y ou can make configuration changes either through an asynchronous terminal (T erminal Mode) or by manually changing switches and jumpers on the board (Switchpack Mode). T erminal Mode is the default setting. In T erminal Mode:  Y ou change configu[...]

  • Page 18

    Using T erminal and Switchpack Modes 3-2 7924-A2-GB20-30 October 1997 Connect the 9-pin end of the terminal cable into a COM port on your PC. Plug the other end into the modular jack on the termination unit’s front panel. If your PC requires a 25-pin connector to the COM port, see Appendix B, Cable Pin Assignments , for the correct cable pinouts.[...]

  • Page 19

    4-1 7924-A2-GB20-30 October 1997 Customizing DSX-1-Compatible Units 4 Accessing Configuration Options This chapter explains how to change configuration options for HotWire 7924-A1 standalone units that are DSX-1-compatible. Chapter 5 provides similar information for V .35-compatible units. Configuration option settings determine how the unit operat[...]

  • Page 20

    Customizing DSX-1-Compatible Units 4-2 7924-A2-GB20-30 October 1997 This guide depicts the system terminal menus as they appear from a CP unit. This is the default configuration for Model 7924 standalone units. Making Changes fr om the T erminal Interface The Board Configuration menu displays the current board software and hardware settings. It als[...]

  • Page 21

    Customizing DSX-1-Compatible Units 4-3 7924-A2-GB20-30 October 1997 T able 4-1. DSX-1-Compatible Units Configuration Options (1 of 2) 1) HDSL Card T ype Possible Settings: CP , CO Default Setting: CP Indicates the placement of the unit in the network configuration. T o toggle the card type, enter 1 at the Config prompt. CP – Unit is on the custom[...]

  • Page 22

    Customizing DSX-1-Compatible Units 4-4 7924-A2-GB20-30 October 1997 T able 4-1. DSX-1-Compatible Units Configuration Options (2 of 2) 5) Line Build Out Possible Settings: 0 to 133 ft, 133 to 266 ft, 266 to 399 ft, 399 to 533 ft, 533 to 655 ft Default Setting: 0 to 133 ft T o change the line build-out length, enter 5 at the Config command prompt. Y [...]

  • Page 23

    Customizing DSX-1-Compatible Units 4-5 7924-A2-GB20-30 October 1997 Making Changes in Switchpack Mode When operating in Switchpack Mode, you can change configuration options by moving switches on the board hardware. T o enable Switchpack Mode, refer to Switching Between T erminal and Switchpack Modes in Chapter 3, Using T erminal and Switchpack Mod[...]

  • Page 24

    Customizing DSX-1-Compatible Units 4-6 7924-A2-GB20-30 October 1997 Displaying Line Build-Out Definitions Enter 7 at the Config prompt to display the switchpack and board settings for line build-out. Use this information to change the line build-out parameter manually . (Switchpack definitions are also listed in Appendix C, Switchpacks and Jumpers [...]

  • Page 25

    5-1 7924-A2-GB20-30 October 1997 Customizing V .35-Compatible Units 5 Accessing Configuration Options This chapter explains how to change configuration options for HotWire 7924-A1 models that are V .35-compatible. Chapter 4 provides similar information for DSX-1-compatible units. Configuration option settings determine how the unit operates. Y ou c[...]

  • Page 26

    Customizing V .35-Compatible Units 5-2 7924-A2-GB20-30 October 1997 Making Changes fr om the T erminal Interface The Board Configuration menu displays the current board software and hardware settings. It also allows you to change certain parameters on the board. This function is affected by the status of the switchpack (DIP switch control) setting.[...]

  • Page 27

    Customizing V .35-Compatible Units 5-3 7924-A2-GB20-30 October 1997 Possible values for each parameter are listed in T able 5-1 . See Appendix A, Worksheets , for help in selecting the appropriate configuration options for your application. T able 5-1. V .35-Compatible Units Configuration Options 1) HDSL Card T ype Possible Settings: CP , CO Defaul[...]

  • Page 28

    Customizing V .35-Compatible Units 5-4 7924-A2-GB20-30 October 1997 Making Changes in Switchpack Mode When operating in Switchpack Mode, you can change configuration options by moving switches on the board hardware. T o enable Switchpack Mode, refer to Switching Between T erminal and Switchpack Modes in Chapter 3, Using T erminal and Switchpack Mod[...]

  • Page 29

    Customizing V .35-Compatible Units 5-5 7924-A2-GB20-30 October 1997 Displaying Switchpack Definitions Enter 4 at the Config prompt to display the definition of each position in the two switchpacks. Switchpack definitions are also listed in Appendix C, Switchpacks and Jumpers . Config → 4 Switch pack 1 definition: 1 – CO/CP OFF=CP, ON=CO 2 – D[...]

  • Page 30

    6-1 7924-A2-GB20-30 October 1997 Monitoring the Unit 6 What to Monitor This chapter presents information on how to access and monitor status and performance statistics for the unit and its network connection. Y ou can monitor operations by viewing the:  Board Status option from the Main Menu  Performance Monitor option from the Main Menu  [...]

  • Page 31

    Monitoring the Unit 6-2 7924-A2-GB20-30 October 1997 Board Status Board Status option from the Main Menu displays HDSL circuit operational status. Enter 1 at the Main Menu Command prompt to display board status. Command → 1 T1 STATUS: Network is UP LOOPBACK STATUS: OFF HDSL STATUS: LOOP A is UP, LOOP B is UP S/N RATIO: Loop A = 44.0 dB, Loop B = [...]

  • Page 32

    Monitoring the Unit 6-3 7924-A2-GB20-30 October 1997 Performance Statistics Performance monitoring allows detailed observations of error conditions detected on the circuits. Performance Monitor statistics can be displayed in defined time periods from the previous minute to the previous 24 hours, plus a running total. These statistics can be cleared[...]

  • Page 33

    Monitoring the Unit 6-4 7924-A2-GB20-30 October 1997 stats → 1 Current 1 minute: HDSL Errors: T1 Errors: FAW LoopA – 0 BPV – 0 FAW LoopB – 0 CRC – 0 CRC LoopA – 0 MOS – 0 CRC LoopB – 0 FEBE LoopA – 0 FEBE LoopB – 0 Previous 1 minute: FAW LoopA – 0 BPV – 0 FAW LoopB – 0 CRC – 0 CRC LoopA – 0 MOS – 0 CRC LoopB – 0 FE[...]

  • Page 34

    Monitoring the Unit 6-5 7924-A2-GB20-30 October 1997 The type of statistics displayed under the T1 Errors column depends on the type of framing selected. When the unit is configured for D4 framing, F AS (Frame Alignment Signal) errors are reported. When the unit is configured for ESF framing, CRC (Cyclic Redundancy Check) errors are reported. Refer[...]

  • Page 35

    Monitoring the Unit 6-6 7924-A2-GB20-30 October 1997 Fr ont Panel LEDs DSX-1-Compatible Unit Upon power up, the first three LEDs blink in sequence, indicating a successful start configuration. The green PWR LED lights whenever power is applied to the board. Loop LEDs blink until the loop has been synchronized and then remain off. TM TERMINAL T1 HDS[...]

  • Page 36

    Monitoring the Unit 6-7 7924-A2-GB20-30 October 1997 V .35-Compatible Unit The green PWR LED lights whenever power is applied to the board. Loop LEDs blink until the loop has been synchronized and then remain off. TERMINAL T1 HDSL DTR DSR Loop Bk PWR F AIL Loop A Loop B 7900 CTS RTS RXD TXD 97-15313 LED Meaning Loop Bk ON: A loopback has been initi[...]

  • Page 37

    7-1 7924-A2-GB20-30 October 1997 T esting 7 Detecting a Pr oblem The unit can detect and report problem conditions and perform diagnostic tests. The unit offers a number of indicators to alert you to possible problems, as described in Chapter 6, Monitoring the Unit :  Front Panel LEDs  Board status and performance statistics  Remote unit b[...]

  • Page 38

    T esting 7-2 7924-A2-GB20-30 October 1997 Local Loopbacks  When a local loopback is enabled, the red Loop Bk LED on the front panel of the initiating unit lights up and remains lit until the loopback is disabled.  The data flow is indicated by the bold thick arrows in Figures 7-1 and 7-2 .  When the CO initiates a local loopback, an Alarm [...]

  • Page 39

    T esting 7-3 7924-A2-GB20-30 October 1997 Remote Loopbacks  When a remote loopback is enabled, the red Loop Bk LED on the front panel of the remote-end unit (CO or CP) lights up and remains lit until the loopback is disabled. The loopback LED on the initiating unit does not light.  A message appears on the remote-end unit reporting that it ha[...]

  • Page 40

    T esting 7-4 7924-A2-GB20-30 October 1997 Starting and Stopping Loopbacks T o start or stop a local loopback test, enter 5 at the Main Menu Command prompt. Command → 5 Local Loopback is Enabled! Command → 5 Local Loopback is Disabled! T o start or stop a remote loopback test, enter 6 at the Main Menu Command prompt. Command → 6 Remote Loopbac[...]

  • Page 41

    T esting 7-5 7924-A2-GB20-30 October 1997 Resetting the Unit T o reset the board, enter 4 at the Main Menu Command prompt. This is equivalent to cycling the power . Command → 4 Reset will bring the loops down. Are you sure? (y/n) Command → If “y” is selected, the Main Menu reappears, the loops go down, and the F AIL (reset) LED lights up. P[...]

  • Page 42

    A-1 7924-A2-GB20-30 October 1997 W orksheets A Overview The worksheets in this appendix show the correct configuration settings based on the types of units (DSX-1-compatible or V .35-compatible) on either end of the HDSL connection. There are two combinations of the two types of units:  DSX-1-compatible units on both ends  V .35-compatible un[...]

  • Page 43

    Worksheets A-2 7924-A2-GB20-30 October 1997 DSX-1-to-DSX-1 Configuration M ultiple xe r DSX-1 Un i t DSX-1 M ultiple xe r DSX-1 Un i t DSX-1 C ross- ca mpus 2 - or 4 - wire fa cility Customer Premises Central Site 97- 15296 T o connect two DSX-1-compatible units, configure the units as follows. T erminal mode factory defaults are in bold (for Switc[...]

  • Page 44

    Worksheets A-3 7924-A2-GB20-30 October 1997 DSX-1-to-V .35 Configuration R oute r V .35 Un i t V .35 LAN Customer Premises DSX-1 DSX-1 Central Site C ross- ca mpus 2 - or 4 - wire fa cility 97- 15420 M ultiple xe r T o connect a V .35-compatible unit on the CP side and a DSX-1-compatible unit on the CO side, configure the units as follows. T ermina[...]

  • Page 45

    Worksheets A-4 7924-A2-GB20-30 October 1997 Unframed Operation Some units do not support unframed operation. T o determine whether or not your DSX-1-compatible unit supports unframed operation when connected to a V .35-compatible unit, all three of the following conditions must be true: 1. The DSX-1-compatible unit must have a firmware revision num[...]

  • Page 46

    Worksheets A-5 7924-A2-GB20-30 October 1997 DSX-1-Compatible Units Configuration W orksheet Board Configuration Configuration Option Settings Default in Bold Card T ype CP , CO Loops Enabled Dual , Single T1 Line Encode B8ZS , AMI Framing D4 , Extended Superframe, Unframed Line Build Out 1) 0 to 133 feet – 0 dB 2) 133 to 266 feet 3) 266 to 399 fe[...]

  • Page 47

    B-1 7924-A2-GB20-30 October 1997 Cable Pin Assignments B T erminal Connection Cable Pin Assignments This section defines the pin assignments for the terminal cable from the front panel modular jack to your PC’s COM port. If your PC’s COM port requires a 9-pin D-shell connector , the cable must use the following pin assignments. 97-15268-0 2 1 4[...]

  • Page 48

    Cable Pin Assignments B-2 7924-A2-GB20-30 October 1997 If your PC’s COM port requires a 25-pin D-shell connector , the cable must use the following pin assignments. 97-15442-0 1 1 4 5 7 8 2 3 7 6 8 20 4 5 Modular Pin 25-Pin D-Shell Pin RXD TXD GND TXD RXD GND DSR DCD DTR RTS CTS HDSL Loop Connection Cable Pin Assignments The HDSL modular connecto[...]

  • Page 49

    Cable Pin Assignments B-3 7924-A2-GB20-30 October 1997 T1 Network Connection Cable Pin Assignments The modular connector that plugs into the rear panel of DSX-1-compatible units has the following pin assignments. Pin Signal 1 Tx Ring 2 Tx T ip 3 open 4 Rx Ring 5 Rx T ip 6 – 8 open NOTE: Pin 1 is on the left when viewing the jack from its inserted[...]

  • Page 50

    Cable Pin Assignments B-4 7924-A2-GB20-30 October 1997 V .35 Connection Cable Pin Assignments The connector that plugs into the rear panel of V .35-compatible units has the following pin assignments. CCITT Code Pin Name Direction DCE DTE Function Description 101 A PG Protective Ground Machine ground 102 B SG Signal Ground Ground reference for all c[...]

  • Page 51

    C-1 7924-A2-GB20-30 October 1997 Switchpacks and Jumpers C DSX-1-Compatible Units Use Figure C-1 to assist you in locating the switchpacks and jumpers on the board. The jumper and switchpack detailed in Figure C-1 are used to change configuration options. All other jumpers (listed below) must remain as positioned at the factory . Jumper Pins (Facto[...]

  • Page 52

    Switchpacks and Jumpers C-2 7924-A2-GB20-30 October 1997 97-15379-02 P1 1 Switchpack S1 VT100 T erminal Modular Jack S1 HDSL Line Jack P9 P8 P12 P3 Jumper P1 1 Position 1 2 3 4, 5, 6 7, 8 Settings* OFF = CP ON = CO OFF = AMI line encoding ON = B8ZS line encoding OFF = Loops A and B ON = Loop A 000 = 0–133 ft 100 = 133–266 ft 010 = 266–399 ft [...]

  • Page 53

    Switchpacks and Jumpers C-3 7924-A2-GB20-30 October 1997 V .35-Compatible Units Use Figure C-2 to assist you in locating the switchpacks and jumpers on the board. The jumper and switchpacks detailed in Figure C-2 are used to change configuration options. All other jumpers (listed below) must remain as positioned at the factory . Jumper Pins (Factor[...]

  • Page 54

    Switchpacks and Jumpers C-4 7924-A2-GB20-30 October 1997 97-15524-0 1 S1 S2 P8 V .35 Switchpack S1 Switchpack S2 Jumper P8 VT100 T erminal Modular Jack HDSL Line Jack P4 P1 P2 P10 P1 1 P9 P5 Position 1 2 3 4, 5 6, 7, 8 Settings* OFF = CP ON = CO OFF = Loops A and B ON = Loop A unused 10 = Loop Clock unused Position 1 2 3 4 5 6 7 8 Settings* ON = 64[...]

  • Page 55

    GL-1 7924-A2-GB20-30 October 1997 Glossary Alternate Mark Inversion coding format. Bipolar Violation. A type of error detected by using a modified bipolar signaling method in which a control code is inserted. Used with AMI coding format. Bipolar with eights and Zeroes Substitution. An encoding scheme for transmitting clear channel signals over a T1[...]

  • Page 56

    Glossary GL-2 7924-A2-GB20-30 October 1997 Federal Communications Commission. Board of Commissioners that regulates all U.S. interstate, intrastate, and foreign electrical communication systems that originate from the United States. Far End Bit Error . Number of errors reported by the remote equipment. High Density Bipolar 3 coding format. High-bit[...]

  • Page 57

    IN-1 7924-A2-GB20-30 October 1997 Index A AIS (alarm indication signal), 7-2, 7-3 AMI line encoding, 4-3 B B8ZS line encoding, 4-3 board layout DSX1 compatible unit, C-2 V .35 compatible unit, C-4 board status, 6-2 for remote unit, 6-5 C cables connecting power , 2-2 DSX-1 connection, 2-2 HDSL loop connection pin assignments, B-2 network connection[...]

  • Page 58

    Index IN-2 7924-A2-GB20-30 October 1997 J jumpers DSX-1 compatible unit, C-1 procedure for setting, 3-2 V .35 compatible unit, C-3 L LEDs, 6-6 DSX-1 compatible unit, 6-6 V .35 compatible unit, 6-7 line build out how to display , 4-6 options, 4-4 line encoding options, 4-3 local loopback test, 7-2 loopback tests, 7-1 local, 7-2 remote, 7-3 starting [...]