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Paradyne HotWire 7924 User Manual

Standalone t1 hdsl termination unit
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H
W
OT
IRE
MODEL 7924 STANDALONE
T1 HDSL TERMINATION UNIT
USER'S GUIDE
Document No. 7924-A2-GB20-30
October 1997

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  • Page 1 MODEL 7924 STANDALONE T1 HDSL TERMINATION UNIT USER’S GUIDE Document No. 7924-A2-GB20-30 October 1997...
  • Page 2 Paradyne Corporation, 8545 126th Avenue North, P.O. Box 2826, Largo, Florida 33779-2826. Paradyne Corporation makes no representation or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for a particular purpose. Further, Paradyne Corporation reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of Paradyne Corporation to notify any person of such revision or changes.

  • Page 3: Important Safety Instructions

    Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk of electric shock from lightning. — Do not use the telephone to report a gas leak in the vicinity of the leak. 7924-A2-GB20-30 October 1997 Important Information...
  • Page 4 The authority to operate this equipment is conditioned by the requirements that no modifications will be made to the equipment unless the changes or modifications are expressly approved by Paradyne Corporation.

  • Page 5: Table Of Contents

    Contents About This Guide Document Purpose and Intended Audience Document Summary Product-Related Documents About HotWire Model 7924 Termination Units HotWire 7924-A1 Models and Features Typical Configurations User Interface Types Installing the Unit Overview Package Checklist for HotWire Model 7924-A1 Connecting to the Network...
  • Page 6 ............. 7924-A2-GB20-30...
  • Page 7 Glossary Index 7924-A2-GB20-30 ..........

  • Page 8: Dsx-1-Compatible Units

    HotWire 7924 may be ordered either as a standalone unit (7924-A1-xxx) or as a nest-mounted card (7924-B1-xxx) that fits in a HotWire 7900 nest. This guide describes the installation and maintenance procedures for the standalone version, Model 7924-A1-xxx.
  • Page 9 HotWire Model 7900 10-Slot Standalone Shelf Installation Instructions HotWire Model 7900 Nest and Options Installation Guide HotWire Models 7924 and 7925 T1 and E1 HDSL Nest Card Termination Units User’s Guide HotWire Model 7925 Standalone E1 HDSL Termination Unit User’s Guide on page A at the beginning of this User’s Guide.

  • Page 10: Hotwire 7924-A1 Models And Features

    Local and remote alarm surveillance Local and remote T1 network and HDSL loop performance monitoring HotWire 7924 may be ordered either as a standalone unit (7924-A1-xxx) or as a nest-mounted card (7924-B1-xxx) that fits in a HotWire 7900 nest. This guide describes the installation and maintenance procedures for the standalone version, Model 7924-A1-xxx.
  • Page 11 About HotWire Model 7924 Termination Units There are several versions of the Model 7924-A1, each supporting a different interface (DSX-1 or V.35) and power supply (120 Vac, 230 Vac, or – 48 Vdc): Model Number 7924-A1-201 7924-A1-202 7924-A1-301 7924-A1-302 7924-A1-501...

  • Page 12: Typical Configurations

    (CO) unit and the other is the remote or customer premises (CP) unit. The HotWire Model 7924 standalone unit is configured at the factory to operate at the CP side of a T1 HDSL connection. (Conversely, HotWire Model 7924 nest cards are configured for CO operation.) The central site unit must be reconfigured...
  • Page 13 Figure 1-2 HotWire Model 7924 nest cards. The nest cards at the central site each terminate a single HDSL subscriber line. Each line is then converted to a DSX-1 interface for connection to other central office equipment, such as a digital cross-connect system (DCS).

  • Page 14: User Interface Types

    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. Cellular Network Access...

  • Page 15: Overview

    Overview This chapter describes the procedure for installing a single standalone termination unit using a 120 Vac or 230 Vac 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 Model 7900 10-Slot Standalone Shelf.

  • Page 16: Connecting To The Network

    2. Connect a V.35 or DSX-1 interface cable into the appropriate connector on the rear panel. Connect the other end to your V.35 or DSX-1 equipment. HotWire 7924 V.35-compatible units are not designed to be used at both ends of an HDSL connection.

  • Page 17: Choosing An Interface Mode

    Any changes you make in Terminal Mode are lost when you change to Switchpack Mode. Connecting to a System Terminal An optional system maintenance terminal is attached to your Model 7924 standalone termination unit through the modular jack on the front panel. Terminals can be attached to both endpoints (CO and CP).

  • Page 18: Switching Between Terminal And Switchpack Modes

    6. Power up the board to reset and enable the new configuration. , for the correct cable pinouts. (for DSX-1-compatible units) or Chapter 5 Switchpacks and Jumpers October 1997 Cable Pin Chapters 4 (for V.35-compatible units) , for jumper locations on your Switchpacks and 7924-A2-GB20-30...

  • Page 19: Accessing Configuration Options

    Customizing DSX-1-Compatible Units Accessing Configuration Options This chapter explains how to change configuration options for HotWire 7924-A1 standalone units that are DSX-1-compatible. information for V.35-compatible units. Configuration option settings determine how the unit operates. You can change a unit’s configuration options by: Selecting the Board Configuration branch of the Main Menu while in Terminal Mode.

  • Page 20: Making Changes From The Terminal Interface

    Customizing DSX-1-Compatible Units 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 from the Terminal Interface The Board Configuration menu displays the current board software and hardware settings.
  • Page 21 Extended Superframe – Framing method consisting of 24 frames of 192 bits each, with the 193rd bit providing timing and other functions. An enhanced version of D4. Unframed – Framing is disabled. NOTE: 7924-A2-GB20-30 Customizing DSX-1-Compatible Units When connecting to a V.35-compatible unit, refer to information before selecting this option.
  • Page 22 Additional options may be displayed on your terminal. These other options (for –7.5, –15, and –22.5 dB) are not for use with this product. Use of these options will cause a weak signal and degrade performance. Select from options 1 through 5 only. October 1997 7924-A2-GB20-30...

  • Page 23: Making Changes In Switchpack Mode

    – Line Build Out Bit 0 – Line Build Out Bit 1 – Line Build Out Bit 2 7,8 – 00=Unframed, 01=D4 Config 7924-A2-GB20-30 Switching Between Terminal and in Chapter 3, Using Terminal and Switchpack Modes. , to locate switchpack S1. OFF=CP, ON=CO...

  • Page 24: Displaying Line Build-Out Definitions

    Bit 1 Bit 0 Application 0 to 133 feet – 0dB 133 to 266 feet 266 to 399 feet 399 to 533 feet 533 to 655 feet -7.5 dB -15 dB -22.5 dB October 1997 Switchpacks and Jumpers ******* 7924-A2-GB20-30...
  • Page 25 Customizing V.35-Compatible Units Accessing Configuration Options This chapter explains how to change configuration options for HotWire 7924-A1 models that are V.35-compatible. DSX-1-compatible units. Configuration option settings determine how the unit operates. You can change a unit’s configuration options by: Selecting the Board Configuration branch of the Main Menu while in Terminal Mode.
  • Page 26 – Dual Loop (Loops A and B) – 1536 Kbps (24x64) Transmit Timing – Loop HDSL FW Rev – 03 AT+T FW Rev – 1.17 CP Serial # – 85649 Board Configuration Switch pack Definitions Redisplays this menu Quit October 1997 7924-A2-GB20-30...
  • Page 27 The transmit timing, HDSL interface/rate, firmware revision numbers, and serial number displayed on the Board Configuration screen cannot be changed. 7924-A2-GB20-30 , for help in selecting the appropriate configuration options for your V.35-Compatible Units Configuration Options 6 – 8 x 64 (512 kbps) 7 –...
  • Page 28 4. Verify that switches 4 and 5 on switchpack S1 are set to ON and OFF, respectively. 5. Replace the cover and screws. 6. Power up the board to reset and enable the new configuration. Switching Between Terminal and in Chapter 3, Using Terminal and Switchpack Modes. October 1997 Switchpacks and Jumpers 7924-A2-GB20-30...

  • Page 29: Displaying Switchpack Definitions

    Switchpack definitions are also listed in Appendix C, and Jumpers Config Switch pack 1 definition: 6–8 Switch pack 2 definition: All switches off = 1536 Kbps (24x64) Config 7924-A2-GB20-30 – CO/CP – Dual/Single Loop Mode – Not Used –...

  • Page 30: Monitoring The Unit

    Board Status option from the Main Menu Performance Monitor option from the Main Menu Board Status and Performance Monitor options from the HTUC (or HTUR) menu (for displaying information about the unit on the other end of the connection) Front Panel LEDs 7924-A2-GB20-30 October 1997...

  • Page 31: Board Status

    LOOP A is UP, LOOP B is UP Loop A = 44.0 dB, Loop B = 43.5 dB ACTIVE ACTIVE LOOP A is UP, LOOP B is UP Loop A = 44.0 dB, Loop B = 43.5 dB. October 1997 7924-A2-GB20-30...

  • Page 32: Performance Statistics

    Accumulated performance statistics may be cleared and restarted by selecting option 7 on the Performance Monitor menu. NOTE: Be sure you want to clear all statistics before pressing 7. There is no verification dialog. 7924-A2-GB20-30 October 1997 Monitoring the Unit...
  • Page 33 FAW LoopB CRC LoopA CRC LoopB FEBE LoopA FEBE LoopB stats Performance Statistics for V.35-Compatible Unit T1 Errors: – BPV – – CRC – – MOS – – – – – CRC – – MOS – – October 1997 7924-A2-GB20-30...

  • Page 34: Remote Unit Information

    ***** HTUC Menu ***** 1) Board Status 2) Performance Monitor 3) Board Configuration 4) Line Build Out Configuration Help ?) Redisplays this Menu Q) Quit HTUC Command 7924-A2-GB20-30 Glossary for definitions of the errors reported. October 1997 Monitoring the Unit...

  • Page 35: Front Panel Leds

    Blinking: HDSL Loop B is synchronizing with the far-end unit (such as when the units are coming up after a reset). If the LED blinks for more than 60 seconds, loss of signal has occurred. Off: Loop B is enabled and synchronized. October 1997 7900 7900 97-15312 for more information. 7924-A2-GB20-30...

  • Page 36: V.35-Compatible Unit

    T1 HDSL TERMINAL Loop Bk FAIL Loop A Loop B 7924-A2-GB20-30 Meaning ON: A loopback has been initiated for testing the equipment connected to Testing , this unit. Refer to Chapter 7, ON: Power is applied to the unit. ON: The processor has halted and repairs are required.

  • Page 37: Testing

    In a remote loopback, the data is passed on to the remote (far-end) unit and then reflected back. Loopback tests are initiated through the terminal interface from either the CO or CP side of the HDSL connection. 7924-A2-GB20-30 Monitoring the Unit October 1997...

  • Page 38: Local Loopbacks

    7900 7900 Loop Bk LED lights AIS = Alarm Indication Signal Terminal E1 HDSL E1 HDSL 7900 7900 October 1997 Figures 7-1 and 7-2. Diagnostic Equipment 7900 7900 97-15514-01 Diagnostic Equipment 7900 7900 Loop Bk LED lights 97-15518-01 Terminal 7924-A2-GB20-30...

  • Page 39: Remote Loopbacks

    V.35-compatible CP units.) Diagnostic Equipment Figure 7-3. Remote Loopback, Initiated at the CO Unit Diagnostic Equipment Figure 7-4. Remote Loopback, Initiated at the CP Unit 7924-A2-GB20-30 E1 HDSL E1 HDSL 7900 7900 Loop Bk LED lights AIS = Alarm Indication Signal...

  • Page 40: Starting And Stopping Loopbacks

    Only one loopback may be run at a time. If a loopback is already enabled, the following error message appears and no other loopback may be started until the first loopback is disabled: “CANNOT EXECUTE COMMAND! Current loopbacks must be removed first.” October 1997 7924-A2-GB20-30...

  • Page 41: Resetting The Unit

    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 FAIL (reset) LED lights up. Pressing any key other than “y” is interpreted as an “n”. 7924-A2-GB20-30 October 1997 Testing...

  • Page 42: Worksheets

    V.35-compatible unit on the CP end, DSX-1-compatible unit on the CO end NOTE: HotWire 7924 V.35-compatible units are not designed for use at both ends of an HDSL connection. If your application requires V.35 equipment at both ends of an HDSL connection, consider using two Hotwire 7925 E1 HDSL termination units.

  • Page 43: Dsx-1-To-Dsx-1 Configuration

    2) 133 to 266 ft 2) 133 to 266 ft 3) 266 to 399 ft 3) 266 to 399 ft 4) 399 to 533 ft 4) 399 to 533 ft 5) 533 to 655 ft 5) 533 to 655 ft October 1997 7924-A2-GB20-30...

  • Page 44: Dsx-1-To-V.35 Configuration

    Configuration Option Card Type Loops Enabled Payload Rate Framing T1 Line Encode Line Build-Out 7924-A2-GB20-30 V.35-Compatible Unit DSX-1-Compatible Unit (Customer Premises) (Central Site) Dual (Loops A & B) or Must be same as CP side Single (Loop A) 1 – 9 (64 – 1536 kbps)

  • Page 45: Unframed Operation

    Main Menu (a system terminal is required). If you have a DSX-1-compatible nest-mounted unit, refer to the HotWire Models 7924 and 7925 T1 and E1 HDSL Nest Card Termination Units User’s Guide . 2. The V.35-compatible unit must have an HDSL firmware revision number of three (03) or higher.

  • Page 46: Dsx-1-Compatible Units Configuration Worksheet

    V.35-Compatible Units Configuration Worksheet Board Configuration Configuration Option Card Type Loops Enabled Payload Rate Options 8 and 9 require Loops A and B. 7924-A2-GB20-30 Settings CP, CO Dual, Single B8ZS, AMI D4, Extended Superframe, Unframed 1) 0 to 133 feet – 0 dB...

  • Page 47: Terminal 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. Modular 7924-A2-GB20-30 9-Pin D-Shell Pin October 1997 97-15268-02...

  • Page 48: Hdsl Loop Connection Cable Pin Assignments

    5 – 8 NOTE: Pin 1 is on the left when viewing the jack from its inserted position. 25-Pin D-Shell Pin Signal Loop A Tip Loop A Ring Loop B Tip Loop B Ring open October 1997 97-15442-01 7924-A2-GB20-30...

  • Page 49: 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. 6 – 8 NOTE: Pin 1 is on the left when viewing the jack from its inserted position. 7924-A2-GB20-30 Signal Tx Ring Tx Tip open...

  • Page 50: V.35 Connection Cable Pin Assignments

    To help detect center of signaling element on BB Element Timing (B) Transmit Signal To help detect center of signaling element on BA Element Timing (A) Transmit Signal To help detect center of signaling element on BB Element Timing (B) Test Indicator Reserved for test October 1997 7924-A2-GB20-30...
  • Page 51 The jumper and switchpack detailed in configuration options. All other jumpers (listed below) must remain as positioned at the factory. Jumper 7924-A2-GB20-30 to assist you in locating the switchpacks and jumpers on the Figure C-1 Pins (Factory-Setting) 2–3 No Jumper 2–3...
  • Page 52 8 to the second digit. For example, set 7 OFF and 8 ON for D4 framing. 1 2 3 1 2 3 1 2 3 1 2 3 3 2 1 HDSL Line Jack October 1997 VT100 Terminal Modular Jack Jumper P11 Pins* Settings* Terminal Mode Switchpack Mode 97-15379-02 7924-A2-GB20-30...
  • Page 53 The jumper and switchpacks detailed in configuration options. All other jumpers (listed below) must remain as positioned at the factory. Jumper 7924-A2-GB20-30 to assist you in locating the switchpacks and jumpers on the Figure C-2 Pins (Factory-Setting) 1–2 1–2 2–3...
  • Page 54 ON = 256 kbps ON = 384 kbps ON = 512 kbps ON = 768 kbps ON = 1024 kbps All ON = 64 kbps All OFF = 1536 kbps Jumper P8 Pins* Settings* Terminal Mode Switchpack Mode 97-15524-01 7924-A2-GB20-30...
  • Page 55 2.048 Mbps defined by CCITT standards G.703 and G.704. factory defaults A predetermined set of configuration options for general operation. Frame Alignment Signal. A loss of signal (LOS) error detection. Frame Alignment Word. A loss of synchronization error detection. 7924-A2-GB20-30 October 1997 GL-1...
  • Page 56 A data signaling rate common in the United States. A term for a digital carrier facility used to transmit a DS1 formatted signal of 1.544 Mbps. Transmit Data. An EIA-lead standard for V.24 circuit CT 103; an input signal (DTE-to-DCE). V.35 ITU-T standard for a high-speed, 34-pin, DCE/DTE interface. GL-2 October 1997 7924-A2-GB20-30...
  • Page 57 COM port settings, 3-2 configuration options changing in switchpack mode, 4-5, 5-4 changing in terminal mode, 4-2, 5-2 DSX-1 compatible units, 4-3 V.35 compatible units, 5-3 7924-A2-GB20-30 configuration worksheets DSX1 compatible unit, A-5 V.35 compatible unit, A-5– A-7 configurations campus network, 1-3...
  • Page 58 7-2 remote loopback, 7-3 starting and stopping, 7-4 time slot assignments, A-4 unframed, 4-3 restrictions on use, A-4 user interface, 1-5, 3-1 V.35 to DSX-1 configuration, A-3 VT100 interface, 3-1 warranty telephone number, A worksheets, A-1 October 1997 7924-A2-GB20-30...

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