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Paradyne HOTWIRE 7924 User Manual

Standalone t1 hdsl termination unit
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AREA CODE CHANGE
Please note that the area code for
Paradyne Corporation in Largo, Florida
has changed from 813 to 727.
For any Paradyne telephone number that
appears in this manual with an 813 area
code, dial 727 instead.

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  • Page 1 AREA CODE CHANGE Please note that the area code for Paradyne Corporation in Largo, Florida has changed from 813 to 727. For any Paradyne telephone number that appears in this manual with an 813 area code, dial 727 instead.
  • Page 2 MODEL 7924 STANDALONE T1 HDSL TERMINATION UNIT USER’S GUIDE Document No. 7924-A2-GB20-10 June 1997 Preliminary Draft...
  • Page 3 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 4 Important Information 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.
  • Page 5 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 6 ........About HotWire Model 7924 Termination Units HotWire 7924-A1 Models and Features ......

  • Page 7: Table Of Contents

    Contents Customizing V.35-Compatible Units Accessing Configuration Options ........Making Changes from the Terminal Interface .
  • Page 8 Contents Cable Pin Assignments Terminal Connection Cable Pin Assignments ..... . . HDSL Loop Connection Cable Pin Assignments ..... T1 Network Connection Cable Pin Assignments .
  • Page 9 Document Summary Section Description Chapter 1 About HotWire 7924 Termination Units . Describes the features of each version of the Model 7924 and typical configurations. Chapter 2 Installing the Unit . Describes how to install the unit and make connections.
  • Page 10 About This Guide Section Description Chapter 7 Testing . Provides information about available loopback tests. Appendix A Worksheets. Contains all the configuration options, default settings, and possible settings to use for planning. Appendix B Cable Pin Assignments. Contains connector and interface details.
  • Page 11 Local and remote alarm surveillance Local and remote T1 and HDSL 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...
  • Page 12 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 (– 48 Vdc, 220 Vac, or 120 Vac): Model Number Features 7924-A1-201 1.544 Mb/s DSX-1 compatible. Connection to 120 Vac power supply.
  • Page 13 About HotWire Model 7924 Termination Units Typical 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 two typical campus applications where remote routers or multiplexers are interconnected across a campus using two HotWire Model 7924 standalone units.
  • Page 14 About HotWire Model 7924 Termination Units 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 cards.
  • Page 15 About HotWire Model 7924 Termination Units 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.
  • Page 16 Installing the Unit Package Checklist for HotWire Model 7924-A1 Verify that your package contains the following: A HotWire Model 7924-A1 unit VT100 Terminal Cable A 14 twisted-pair network cable Power cord with power transformer (optional) Warranty card Connecting to the Network Procedure 1.
  • Page 17 Installing the Unit Connecting Power to the Unit 48 VDC HDSL DS-1 150 mA Power 97-15356 DSX-1-Compatible HotWire 7924 – Rear Panel V.35 HDSL 48 VDC 97-15264 V.35-Compatible HotWire 7924 – Rear Panel As described in Chapter 1, there are several options for power cords, depending on your power source (120 Vac, 230 Vac, or –...
  • Page 18 Using Terminal and Switchpack Modes Choosing an Interface Mode You can make configuration changes either through the system terminal menus (Terminal Mode) or by manually changing switches and jumpers on the board (Switchpack Mode). Terminal Mode is the default setting. In Terminal Mode: You change configuration parameters by selecting menu options that appear on a VT100-compatible terminal attached to the front panel of the termination...
  • Page 19 Using Terminal and Switchpack Modes connector to the COM port, see Appendix B, Cable Pin Assignments , for the correct cable pinouts. Make sure the terminal parameters on your PC are set to: 9600 baud 8 bit no parity 1 stop bit no flow control Press return from your VT100-compatible terminal window to activate the Main Menu for the attached unit.

  • Page 20: Accessing Configuration Options

    Accessing Configuration Options This chapter provides instructions on how to change configuration options for HotWire 7924 standalone units that are DSX-1-compatible. Chapter 5 provides similar information for V.35-compatible units. Configuration option settings determine how the unit operates. You can change a unit’s configuration options by:...

  • Page 21: Making Changes From The Terminal Interface

    Customizing DSX-1-Compatible Units The “G123” code indicates the unit powered up successfully. Enter “?” to redisplay the menu from the Command prompt. The CP unit is also known as an HTU-R. A unit on the CO side is an HTU-C. Each unit allows you to monitor the unit on the other side.
  • Page 22 Customizing DSX-1-Compatible Units Command Board Configuration: 1) HDSL Card Type – CP HDSL Rate Type – T1 2) Loops Enabled – Dual Loop (Loops A and B) 3) T1 Line Encode – B8ZS 4) Framing – D4 5) Line Build Out –...
  • Page 23 Customizing DSX-1-Compatible Units Table 4-1. DSX-1-Compatible Units Configuration Options (2 of 2) 3) T1 Line Encode Possible Settings: B8ZS, AMI Default Setting: B8ZS Specifies the type of line encoding used to ensure one’s density in the transmission signal. To toggle the encoding method, enter 3 at the Config prompt. B8ZS –...

  • Page 24: Making Changes In Switchpack Mode

    Customizing DSX-1-Compatible Units Options 6 and 7 (Switchpack and Line Build-Out Definitions) on the Config menu display the switchpack and jumper positions used when changing configuration changes manually. These options are described in later sections of this chapter. Making Changes in Switchpack Mode When operating in Switchpack Mode, you can change configuration options by moving switches on the board hardware.
  • Page 25 Customizing DSX-1-Compatible Units Displaying Line Build-Out Definitions Enter 7 at the Config prompt to display the switchpack and board settings for line build-out. This information is useful if you need to change the line build-out Switchpacks and parameter manually. (Switchpack definitions are also listed in Jumpers , Appendix C.) Config...
  • Page 26 Accessing Configuration Options This chapter provides instructions on 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. You can change a unit’s configuration options by:...
  • Page 27 Customizing V.35-Compatible Units The “G123” code indicates that the unit powered up successfully. Enter “?” to redisplay the menu. The CP unit is also known as an HTU-R. A unit on the CO side is an HTU-C. Each unit allows you to monitor the unit on the other side. Therefore, CP units have an option “HTUC Menu”...

  • Page 28: Displaying Switchpack Definitions

    Customizing V.35-Compatible Units Possible values for each parameter are listed in Table 5-1. See Worksheets Appendix A, for help in selecting the appropriate configuration options for your application. Table 5-1. V.35-Compatible Units Configuration Options 1) HDSL Card Type Possible Settings: CP, CO Default Setting: CP Indicates the placement of the unit in the network configuration.
  • Page 29 Customizing V.35-Compatible Units Making Changes in Switchpack Mode When operating in Switchpack Mode, you can change configuration options by moving switches on the board hardware. To enable Switchpack Mode, refer to Switching Between Terminal and Switchpack Modes in Chapter 3. Procedure To open the unit and make changes while in Switchpack Mode: 1.
  • Page 30 Customizing V.35-Compatible Units 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 Switchpacks and Jumpers Appendix C. Config Switch pack 1 definition: – CO/CP OFF=CP, ON=CO –...

  • Page 31: Monitoring The Unit

    Monitoring the Unit What to Monitor This chapter presents information on how to access and monitor status and performance statistics for the unit and its network connection. You can monitor operations by viewing: 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...

  • Page 32: Performance Statistics

    Monitoring the Unit Command DTR: ACTIVE DSR: ACTIVE LOOPBACK STATUS: OFF HDSL STATUS: LOOP A is UP, LOOP B is UP S/N RATIO: Loop A = 44.0 dB, Loop B = 43.5 dB. Command Board Status for V.35-Compatible Unit T1 status displays one of the following: Network is Up, Receive Carrier Loss, Receive Remote Alarm, or Receive Unframed All 1’s.
  • Page 33 Monitoring the Unit Command Time Since Board Power–Up or Reset: 17:31:51 – 1 minute stats. – 15 minute stats. – 1 hour stats. – 12 hour stats. – 24 hour stats. – Running total. – Clear Statistics. – Quit stats Select a time frame from the above list to display statistics for a specified time period.

  • Page 34: Remote Unit Information

    Monitoring the Unit stats Current 1 minute: HDSL Errors: FAW LoopA FAW LoopB CRC LoopA CRC LoopB FEBE LoopA FEBE LoopB Previous 1 minute HDSL Errors: FAW LoopA FAW LoopB CRC LoopA CRC LoopB FEBE LoopA FEBE LoopB stats Performance Statistics for V.35-Compatible Unit Refer to the Glossary for definitions of the types of errors reported.

  • Page 35: Front Panel Leds

    Monitoring the Unit Front 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. T1 HDSL TERMINAL NETWORK...

  • Page 36: V.35-Compatible Unit

    Monitoring the Unit 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. T1 HDSL TERMINAL 7900 97-15313 Meaning Loop Bk A loopback has been initiated for testing the equipment connected to this unit.

  • Page 37: Testing

    Testing Detecting a Problem 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 Monitoring the Unit described in , Chapter 6: Front Panel LEDs Board status and performance statistics Remote unit board status and performance statistics Understanding Loopback Tests...

  • Page 38: Local Loopbacks

    Testing Local Loopbacks When a local loopback is enabled the red Loop Bk LED on the front panel of the CO unit lights up and remains lit until the loopback is disabled. Figure 7-1 illustrates local loopback in a connection between two DSX-1- compatible units.

  • Page 39: Remote Loopbacks

    Testing Remote Loopbacks When a remote loopback is enabled the red Loop Bk LED on the front panel of the CP unit lights up and remains lit until the loopback is disabled. The loopback LED on the CO unit does not light. Figure 7-3 illustrates remote loopback in a connection between two DSX-1- compatible units.

  • Page 40: Starting And Ending Loopbacks

    Testing Starting and Ending Loopbacks To start or stop a local loopback test from a CO unit, enter 5 at the Command prompt. Command Local Loopback is Enabled! Command Local Loopback is Disabled! Resetting boards is recommended to ensure payload data integrity! To reset the unit after stopping (disabling) a local loopback, enter 4 at the Command prompt.

  • Page 41: 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 42: Dsx-1-To-Dsx-1 Configuration

    Worksheets DSX-1-to-DSX-1 Configuration To connect two DSX-1-compatible units, configure the units as follows (factory defaults are in bold): Configuration DSX-1-Compatible Unit DSX-1-Compatible Unit Option (Customer Premises) (Central Site) Card Type CP (default) Loops Enabled Dual (Loops A & B) or Must be same as CP side Single (Loop A) T1 Line Encode...

  • Page 43: Dsx-1-To-V.35 Configuration

    Worksheets DSX-1-to-V.35 Configuration To 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 (factory defaults are in bold): Configuration V.35-Compatible Unit DSX-1-Compatible Unit Option (Customer Premises) (Central Site) Card Type Loops Enabled Dual (Loops A &...
  • Page 44 Worksheets When the V.35 payload rate is set for less than 1536 Kbps, that payload rate determines which T1 DS0s are used, as follows: V.35 Payload Rate DSX-1 T1 DS0s Used 1 (64 Kbps) 2 (128 Kbps) 1, 2 3 (192 Kbps) 1 –...

  • Page 45: Dsx-1-Compatible Units Configuration Worksheet

    Worksheets DSX-1-Compatible Units Configuration Worksheet Board Configuration Configuration Option Settings Default in Bold Card Type CP, CO Loops Enabled Loops A and B, Loop A T1 Line Encode B8ZS, AMI Framing D4, Extended Super Frame, Unframed (unsupported at this time) Line Build Out 1) 0 to 133 feet –...
  • Page 46 Cable Pin Assignments 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.
  • Page 47 Cable Pin Assignments If your PC’s COM port requires a 25-pin D-shell connector, the cable must use the following pin assignments. Modular 25-Pin D-Shell Pin 97-15442 HDSL Loop Connection Cable Pin Assignments The HDSL modular connector that plugs into the rear panel of the unit has the following pin assignments.
  • Page 48 Cable Pin Assignments 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. Signal Tx Ring Tx Tip open Rx Ring Rx Tip 6 – 8 open NOTE: Pin 1 is on the left when viewing the jack from its inserted position.
  • Page 49 Switchpacks and Jumpers 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) should always be left as positioned at the factory.
  • Page 50 Switchpacks and Jumpers VT100 Terminal Modular Jack Switchpack S1 1 2 3 4 5 6 7 8 Position Settings* OFF = CP ON = CO Jumper P11 OFF = AMI line Pins* Settings* encoding ON = B8ZS line Terminal Mode encoding Switchpack Mode OFF = Loops A and B...
  • Page 51 Switchpacks and Jumpers 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) should always be left as positioned at the factory.
  • Page 52 Switchpacks and Jumpers VT100 Terminal Modular Jack Switchpack S2 Switchpack S1 P1 P2 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Position Settings* Position Settings* OFF = CP ON = 64 kbps ON = CO ON = 128 kbps OFF = Loops A and B...
  • Page 53 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. Carrier Detect. A signal indicating that energy exists on the transmission circuit. Associated with Pin 8 on an EIA-232 interface.
  • Page 54 Glossary Host Termination Unit. A generic reference to either an HTU-C or HTU-R module. HTU-C Host Termination Unit – Central. The module at the CO (central office) or central site end of an HDSL connection. Also known as a Network Termination Unit (NTU). HTU-M Host Termination Unit –...
  • Page 55 Index AMI line encoding, 4-4 framing options, 4-4 B8ZS line encoding, 4-4 installation, 2-1 board layout DSX1 compatible unit, C-2 V.35 compatible unit, C-4 jumpers board status, 6-1 DSX-1 compatible unit, C-1 for remote unit, 6-4 V.35 compatible unit, C-3 card type LEDs, 6-5 DSX-1 compatible units, 4-3...
  • Page 56 Index network performance statistics, 6-2 terminal cable pin assignments, B-1 terminal interface, 3-1 VT100 interface, 3-1 testing, 7-1 payload rate options, 5-3 PC requirements, 3-2 performance statistics, 6-2 pin assignments, B-1 unframed, 4-4 power cord installation, 2-2 user interface, 1-5, 3-1 rear panel diagram, 2-2 V.35 to DSX-1 configuration, A-3 related documents, vi...

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