PairGain 150-1140-51 Manual
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PairGain 150-1140-51 Manual

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H
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L
U
I
AIN
INE
NIT
Model
List Number
Part Number
CLEI Code
HLU-319
5A
150-1140-51
T1L2N20A
P
G
T
, I
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AIR
AIN
ECHNOLOGIES
NC
E
S
T
P
NGINEERING
ERVICES
ECHNICAL
RACTICE
S
150-319-151-01
ECTION

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Summary of Contents for PairGain 150-1140-51

  • Page 1 Model List Number Part Number CLEI Code HLU-319 150-1140-51 T1L2N20A ECHNOLOGIES NGINEERING ERVICES ECHNICAL RACTICE 150-319-151-01 ECTION...
  • Page 2 Information furnished by PairGain Technologies is believed to be accurate and reliable. However, no responsibility is assumed by PairGain Technologies for its use; nor for any infringement of patents or other rights of third parties which may result from its use.
  • Page 3 Check the packing list to ensure complete and accurate shipment of each listed item. If the shipment is short or irregular, contact PairGain as described in the Warranty located on the inside back cover. If you must store the equipment for a prolonged period, store the equipment in its original container.

  • Page 4: Table Of Contents

    Table of Contents 150-319-151-01, Revision 01 ABLE OF ONTENTS Overview ____________________________________________________________________________ 1 Features.............................. 1 Product Enhancements ......................1 Standard Features........................ 2 Compatibility............................. 2 Applications............................2 HiGain Doubler Applications ..................... 3 Personal Communications System Applications ..............3 Front Panel __________________________________________________________________________ 4 Installation ___________________________________________________________________________ 8 Verification............................
  • Page 5 150-319-151-01, Revision 01 Table of Contents Troubleshooting _____________________________________________________________________ 41 System Alarms ..........................41 Alarm Option for DLC Feed .....................42 Retiring System Alarms.....................42 Self Test ..........................42 Loopback Operation.........................43 Generic Loopback Commands ..................43 Special Loopback Commands ...................45 Initiating a Manual Loopback Session ................46 Loopback Test Procedures .......................47 General Troubleshooting Tips ...................47 GNLB Test Procedures......................47...
  • Page 6 Table of Contents 150-319-151-01, Revision 01 Appendix D - Product Support _________________________________________________________ 65 Technical Support..........................65 World Wide Web..........................65 Returns............................. 65 Appendix E - Glossary ________________________________________________________________ 67 Certification and Warranty ______________________________________________ Inside Back Cover September 17, 1999 HLU-319 List 5A...
  • Page 7 150-319-151-01, Revision 01 List of Figures IST OF IGURES 1. HLU-319 List 5A Front Panel.........................4 2. Installing the HLU-319 List 5A into a Shelf ....................8 3. Maintenance Terminal Main Menu .......................14 4. System Spans..............................15 5. Span Status Screen: No Doubler ........................16 6.
  • Page 8 List of Tables 150-319-151-01, Revision 01 IST OF ABLES 1. Front-panel Description ..........................5 2. Front-panel Display Messages........................6 3. Navigational Keys on the Maintenance Terminal ..................13 4. Maintenance Terminal Screens........................14 5. Span Status Fields and Descriptions ......................17 6.

  • Page 9: Overview

    Overview VERVIEW ® ® The PairGain HiGain Line Unit HLU-319 List 5A is the Central Office (CO) side of a repeaterless T1 transmission system. When used in conjunction with a HiGain Remote Unit (HRU), the system provides 1.544 Mbps transmission on two unconditioned copper pairs over the full Carrier Service Area (CSA) range. The CSA includes loops up to 12,000 feet of 24 AWG or 9,000 feet of 26 AWG wire, including bridged taps.

  • Page 10: Standard Features

    Overview 150-319-151-01, Revision 01 Standard Features • Selectable DS1 pre-equalizer • Front-panel features: – Four-character status display – DS1 splitting and bridge access – Status LED – RS-232 craft port for connection to a maintenance terminal • Compatible with SXSS shelves, and equivalent •...

  • Page 11: Higain Doubler Applications

    150-319-151-01, Revision 01 Overview HiGain Doubler Applications For applications without doublers, the HLU-319 is directly connected to the HRU by the two HDSL cable pairs. The HLU-319 List 5A is compatible with all HiGain HRUs. For doubler applications, one to four doublers may be used in the HDSL loops between the HLU and HRU. •...

  • Page 12: Front Panel

    Front Panel 150-319-151-01, Revision 01 RONT ANEL The HLU-319 List 5A front panel is shown in Figure 1. The front-panel components are described in Table 1. For pinout diagrams of the HLU card-edge connector and the craft port, refer to “Appendix A - Specifications”...
  • Page 13 150-319-151-01, Revision 01 Front Panel Table 1. Front-panel Description Front-panel Feature Function List number Identifies the version of the HLU-319. Front-panel display Displays four-character status, provisioning, and alarm system messages. The front-panel display illuminates when power is initially applied. To conserve power the display remains on for only 4 minutes.

  • Page 14: Front-Panel Display Messages

    Front Panel 150-319-151-01, Revision 01 Table 2 lists the front-panel display messages. The four-character display reports the code of a pertinent alarm, loopback or diagnostic message, in some cases followed by a second four-character message that modifies the first message with a value or current configuration setting. Table 2.
  • Page 15 150-319-151-01, Revision 01 Front Panel Table 2. Front-panel Display Messages (Cont.) Message Full Name Description DS0 Blocked Channels Indicates status of DS0 blocked channels. NONE indicates no channels are blocked. BLK indicates some channels are blocked. FERR Framing Bit Error Framing bit error occurred at HLU T1 input.

  • Page 16: Installation

    Upon receipt of the equipment, visually inspect the contents for signs of damage. If the equipment has been damaged in transit, immediately report the extent of damage to the transportation company and to PairGain Technologies. Figure 2. Installing the HLU-319 List 5A into a Shelf When installing an HLU in a chassis, be sure to wear an antistatic wrist strap.

  • Page 17: Verification

    150-319-151-01, Revision 01 Installation ERIFICATION Once the HLU-319 is installed, verify that it is operating properly. To do this, monitor the following: • Status LED • Status messages reported by the front-panel display (see Table 2 on page Verification without a Downstream Device If there is no downstream device installed: Verify that the HLU powers up.

  • Page 18: Provisioning Requirements

    Installation 150-319-151-01, Revision 01 ROVISIONING EQUIREMENTS Refer to “Provisioning” on page 11 for information about using the MODE and SEL buttons or the Maintenance Terminal screens to configure the HLU. While the MODE and SEL buttons can be used to manually accomplish some provisioning tasks, such as setting system options, the Maintenance Terminal screens (available when you connect a PC to the craft port) can handle all provisioning tasks.

  • Page 19: Provisioning

    150-319-151-01, Revision 01 Provisioning ROVISIONING This is a reference section for HLU provisioning. There are two methods for provisioning the HLU-319 List 5A: • Use the MODE and SEL buttons on the front panel of the HLU to: – set system options –...

  • Page 20: Resetting To Factory Default Values

    Provisioning 150-319-151-01, Revision 01 Resetting to Factory Default Values All system settings options (Table 8 on page 21) can be set to the factory default values using the MODE and SEL buttons. To set the user options to their default values: Press the SEL button for 6 seconds until the following message appears: DFLT NO Press the SEL button while the DFLT NO message is displayed.

  • Page 21: Using A Maintenance Terminal

    150-319-151-01, Revision 01 Provisioning SING A AINTENANCE ERMINAL Connecting to a Maintenance Terminal The craft port on the front panel allows you to connect the HLU-319 to a maintenance terminal (ASCII terminal or PC running a terminal emulation program). Once connected to a maintenance terminal, you can access the maintenance, provisioning, and performance screens.

  • Page 22: Maintenance Terminal Main Menu

    Provisioning 150-319-151-01, Revision 01 Maintenance Terminal Main Menu Figure 3 shows the Maintenance Terminal Main Menu from which you can access system administration screens. The function of each screen selection is listed in Table 4. To access a screen, type the letter shown next to the menu item.

  • Page 23: Using The Maintenance Terminal Screens

    150-319-151-01, Revision 01 Provisioning Selecting a Maintenance Terminal Function To perform a function within the Maintenance Terminal screens, you can: • Press the key indicated to the left of the selection. • Press the letter in parenthesis for the parameter to be changed. System Spans As shown in Figure...

  • Page 24: Span Status Screen: No Doubler

    Provisioning 150-319-151-01, Revision 01 Span Status Screen without Doublers SPAN STATUS TIME: 00:27:25 DATE: 09/15/99 CIRCUIT ID#: ALARMS: NONE LOOPBACK: OFF POWER LEVEL: LOW HDSL-1 HDSL-2 HDSL-1 HDSL-2 cur/min/max cur/min/max cur/min/max cur/min/max MARGIN: 21/20/22 23/22/24 21/19/22 22/21/24 dB PULSE ATTN: INS LOSS: 24 HOUR ES: 00004...

  • Page 25: Span Status Fields And Descriptions

    150-319-151-01, Revision 01 Provisioning Table 5 lists the Span Status fields and descriptions. Table 6 Table 7 on page 18 describe alarm and loopback messages displayed on the Span Status screens. Table 5. Span Status Fields and Descriptions Span Status Field Description Time Time of day when Span Status was checked.

  • Page 26: Loopback Messages

    Provisioning 150-319-151-01, Revision 01 Table 6. HDSL System Alarms Message Name Description Bit Error Rate The Total System Error Count (TSEC) has exceeded the user-selected threshold. LOSW Loss of Sync Word One of the HDSL loops has lost synchronization. LLOS Local Loss of Signal No signal from HLU-319 List 5A local T1 input.

  • Page 27: Set Clock Screen

    150-319-151-01, Revision 01 Provisioning Set Clock Screen Press at the Maintenance Terminal Main Menu to open the Set Clock screen (Figure SET CLOCK TIME: 00:14:33 DATE: 09/15/99 CIRCUIT ID#: Format: HH:MM MM/DD/YY NEW TIME: NEW DATE: (U)PDATE REMOTE? Figure 7. Set Clock Screen All time information is lost when power is removed.

  • Page 28: System Settings Screen

    Provisioning 150-319-151-01, Revision 01 System Settings Screen The options set from the System Settings screen are the same as the options set through the HLU-319 Mode and SEL buttons on the front panel. The exceptions are Margin Alarm Threshold and DS0 Blocking, which can only be set at this screen.

  • Page 29: Hlu-319 List 5A System Settings

    150-319-151-01, Revision 01 Provisioning Table 8 describes the System Settings options and lists the corresponding front-panel display codes. Factory default parameters appear in boldface type. Table 8. HLU-319 List 5A System Settings Front-panel System Settings Display Parameter Description Screen Options Code Equalization Sets the Equalizer to DSX-1 for 0 to 133 feet.
  • Page 30 Provisioning 150-319-151-01, Revision 01 Table 8. HLU-319 List 5A System Settings (Cont.) Front-panel System Settings Display Parameter Description Screen Options Code DS1 Line Code AUTO The HLU and HRU monitor the incoming T1 bit streams for the B8ZS line code. If the HRU detects this code, the HLU enters B8ZS output mode.
  • Page 31 150-319-151-01, Revision 01 Provisioning Table 8. HLU-319 List 5A System Settings (Cont.) Front-panel System Settings Display Parameter Description Screen Options Code Remote Provision RTPV Enable remote provisioning. Disable remote provisioning. Bipolar Violation BPVT Enables BPVs and HDSL CRC errors at the T1 input to be converted into T1 Transparency BPVs at the distant end’s T1 output.
  • Page 32 Provisioning 150-319-151-01, Revision 01 BER Option The BER option also uses this (BPV/CRC) TEC to generate an Alarm if enabled. The HLU combines the 1-second TEC counts in both directions for the last 60 seconds. It uses this 1-minute Total System Error Count (TSEC) to generate an alarm if it exceeds the selected BER threshold of (1E-6 or 1E-7) as follows: •...
  • Page 33 150-319-151-01, Revision 01 Provisioning DS1 Line Code Option The DS1 line code option should always be set to conform to the type of DS1 service (AMI or B8ZS) being provided by the HiGain system. The AUTO mode, which can adapt to either AMI or B8ZS, should only be used in applications that require it (such as when HiGain acts as a standby circuit to DS1 circuits whose line codes are not known or may be both AMI and B8ZS).

  • Page 34: Loopback Mode Screen

    Provisioning 150-319-151-01, Revision 01 HLU-319 List 5A. These HiGain units are the only ones that have sufficiently low power consumption to allow their doubler circuits to be line-powered from -140 Vdc. The HRU-411 must have the CPE power option disabled if it is used in a -140 Vdc doubler circuit. •...

  • Page 35: Loopback Menu: Four Doublers

    150-319-151-01, Revision 01 Provisioning Loopback Menu without Doubler LOOPBACK MENU TIME: 00:15:34 DATE: 09/15/99 CIRCUIT ID#: A. DISABLE LOOPBACKS B. NETWORK LOOP HLU (NLOC) C. NETWORK LOOP HRU (NREM) G. CUSTOMER LOOP HLU (CREM) H. CUSTOMER LOOP HRU (CLOC) (E)xit Figure 9.
  • Page 36 Provisioning 150-319-151-01, Revision 01 Initiating a Loopback To send one of the available loopbacks, press the appropriate letter in the Loopback Menu. The following prompt appears: < )? Type < to continue with the loopback selection. The PERFORM SELECTED LOOPBACK ( following message appears: PLEASE WAIT....

  • Page 37: View Performance Data Screen

    150-319-151-01, Revision 01 Provisioning View Performance Data Screen The Performance Data screen shows the Errored (ES) and Unavailable Seconds (UAS) for both HDSL loops and each T1 input at 15-minute intervals over a 4-hour time interval. (The ES and UAS data is separated by a slash mark.) Earlier and later data, in 4-hour time periods on different span screens, can be accessed by pressing (Previous) or (Next) respectively.

  • Page 38: Performance Data Screen: No Doubler

    Provisioning 150-319-151-01, Revision 01 Performance Data Screen without Doubler Figure 12 shows a single non-doubler span. This screen shows the Errored and Unavailable Seconds for the HDSL span between the HLU-319 and the HRU. Invalid report entries are indicated by dashes. Date: 09/15/99 PERFORMANCE DATA CIRCUIT ID#:...

  • Page 39: View Performance History Screen

    150-319-151-01, Revision 01 Provisioning View Performance History Screen The Performance History screen shows the daily occurrences of ES and UAS over a 31-day period in 24-hour increments. Errored Seconds and Unavailable Seconds for both HDSL loops and each of the two DS1 inputs are listed for the current and previous period.

  • Page 40: Day Performance History Screen: Four Doublers (Span 5)

    Provisioning 150-319-151-01, Revision 01 Performance History Screen for Doubler Applications The Performance History screen displays information by span when doublers are present. With multiple doublers (up to four), there can be as many as five span screens. Invalid report entries are indicated by dashes. Time: 00:26:29 SPAN 5 PERFORMANCE HISTORY - 31 DAY CIRCUIT ID#:...

  • Page 41: View Alarm History Screen

    150-319-151-01, Revision 01 Provisioning View Alarm History Screen Press at the Maintenance Terminal Main Menu to open the Alarm History screen. This screen allows you to view alarms that are currently active. In the Alarm History screen (Figure 16 Figure 17 on page 34) the: •...

  • Page 42: Alarm History Screen: No Doubler

    Provisioning 150-319-151-01, Revision 01 Alarm History Screen without Doubler ALARM HISTORY TIME: 00:27:54 DATE: 09/15/99 CIRCUIT ID#: Type First Last Current Count LOS, DS1-HLU LOS, DS1-HRU SPAN1 LOSW, HDSL1 02/01/99-00:00 02/01/99-00:00 SPAN1 LOSW, HDSL2 02/01/99-00:00 02/01/99-00:00 SPAN1 MARGIN L1 SPAN1 MARGIN L2 PWR-SHRT PWR-GND LAST CLEARED:...

  • Page 43: View System Inventory Screen

    150-319-151-01, Revision 01 Provisioning View System Inventory Screen The System Inventory screen (Figure 18 on page 36) lists the six possible units that can comprise one HiGain circuit: one HLU, one HRU and up to four doublers. The information in the System Inventory Screen is presented as follows: •...

  • Page 44: System Inventory Screen: No Doubler

    Provisioning 150-319-151-01, Revision 01 System Inventory Screen without Doubler SYSTEM INVENTORY TIME: 04:17:37 DATE: 09/15/99 A. CIRCUIT ID: UNIT PRODUCT SERIAL NUMBER UNIT ID HLU-319 L5A V7.2 ..000004 NOT REQUIRED B. HRU HRU-402 V1.5 3499000400 C. DB1 D. DB2 F. DB3 G.

  • Page 45: View Troubleshooting Screen

    150-319-151-01, Revision 01 Provisioning View Troubleshooting Screen The Troubleshooting screen graphically analyzes the circuit and identifies any problem areas. Press at the Maintenance Terminal Main Menu to access the Troubleshooting screen. The Troubleshooting screen (Figure 20) appears showing the HLU, the HRU and any doublers that are in the circuit (up to four). HDSL LIne 1 TIME: 17:34:31 TROUBLESHOOTING...

  • Page 46: Troubleshooting With Help

    Provisioning 150-319-151-01, Revision 01 To display the circuit Help diagram (Figure 22), press . The symbol legend used to describe all circuit events and the corresponding troubleshooting tips are located beneath the Help diagram. A troubleshooting symbol on the diagram identifies the location of a problem. The symbols which appear in parentheses are also keyboard commands for obtaining additional information.

  • Page 47: Troubleshooting With Margin Values

    150-319-151-01, Revision 01 Provisioning Press to display margin values for the circuit (Figure 23). TIME: 17:34:38 TROUBLESHOOTING with MARGIN VALUES DATE: 09/15/99 CIRCUIT ID#: >>>>| |=======| |=======| |=======| |=======| |=======| |>>>> <<<<| |=======| |=======| |=======| |=======| |=======| |<<<< |___|23 22|___|22 21|___|22 23|___|23 21|___|22...

  • Page 48: Troubleshooting With 24-Hour Errored Seconds (Es)

    Provisioning 150-319-151-01, Revision 01 Press & to display the HDSL errored seconds, or press to display DS1 errored seconds for the circuit (Figure 25). TIME: 17:34:50 TROUBLESHOOTING with 24 HOUR ES DATE: 09/15/99 CIRCUIT ID#: 020 | |007 003| |006 001| |005 002| |004 002| |002 005|...

  • Page 49: Troubleshooting

    150-319-151-01, Revision 01 Troubleshooting ROUBLESHOOTING This section provides information about system alarms and loopback testing. In addition to these troubleshooting aids, the Maintenance Terminal provisioning interface includes troubleshooting screens that provide a basic graphical analysis of system problems (see “View Troubleshooting Screen” on page 37).

  • Page 50: Alarm Option For Dlc Feed

    Troubleshooting 150-319-151-01, Revision 01 Alarm Option for DLC Feed To improve HiGain compatibility with the switch-to-protect features used in DLC feeder applications, the HLU-319 has an Alarm Pattern Option (ALMP) that allows you to select either an AIS or LOS T1 output payload for the following alarms: •...

  • Page 51: Loopback Operation

    150-319-151-01, Revision 01 Troubleshooting OOPBACK PERATION HiGain has a family of loopback options for analyzing circuit functionality. The loopback signal is transmitted and returned to the sending device for comparison. This allows you to verify the integrity of the HDSL channels to the HLU, the HLU DSX-1 interface and the DS1 channels to the customer.
  • Page 52 Troubleshooting 150-319-151-01, Revision 01 Table 13. Summary of HiGain Loopback Codes Method of Transmission Loopback Code Description Test Set Craft Port MODE/SEL NLOC 1111000 DSX-1 signal is looped back to the network at the HLU. 4-in-7 NDU1 110000 DSX-1 signal is looped back to the network at the HDU1. 2-in-6 NDU2 111000...

  • Page 53: Special Loopback Commands

    150-319-151-01, Revision 01 Troubleshooting Special Loopback Commands In addition to the GNLB loopback command mode, a HiGain system can be configured for one of five special loopback command modes. These are selected from the maintenance terminal System Settings screen (see Table 8 on page 21) or by using the MODE and SEL buttons (see...

  • Page 54: Initiating A Manual Loopback Session

    Troubleshooting 150-319-151-01, Revision 01 Initiating a Manual Loopback Session A manual loopback session allows you to select any one of the HiGain GNLB loopbacks listed in Table 13 on page 44 with the exception of SmartJack loopbacks, which can only be issued by inband commands. Setting the Loopback Time-out Option Before initiating a loopback session, verify that the Loopback Time-out parameter is set to the desired setting.

  • Page 55: Loopback Test Procedures

    150-319-151-01, Revision 01 Troubleshooting Once a loopback is selected and activated, the loopback stays active until it times out (based on the LBTO setting). When a loopback times out, the display then returns to the normal display mode. You can terminate loopbacks manually and exit the MAN LPBK mode by simultaneously pressing the MODE and SEL buttons for 3 or more seconds.
  • Page 56 Troubleshooting 150-319-151-01, Revision 01 Repeat Step 2. If the test passes, the problem is in the downstream direction. If it fails, the problem is in the upstream direction. Figure 28. Loopback Configurations Pressing the Loopback button on a remote unit will deactivate the SmartJack loopback. September 17, 1999 HLU-319 List 5A...

  • Page 57: A1Lb, A2Lb, And A5Lb Test Procedures

    150-319-151-01, Revision 01 Troubleshooting A1LB, A2LB, and A5LB Test Procedures Using the codes listed in Table 14, a network tester can activate NLOC or NREM loopbacks (or SMJK, if enabled). A tester at the customer premises can activate CLOC or CREM loopbacks. All loopbacks shown in Table 14 can also be initiated from the HLU-319 front-panel MODE and SEL buttons (see “Setting Options...
  • Page 58 To avoid this uncertainty, PairGain recommends sending unframed IR commands. The HLU is now in logic loopback if the IOR NLOC loopback command was sent. The Time-out Override command or a Loopdown command can override the selection made for the loopback time-out (see “Setting...
  • Page 59 150-319-151-01, Revision 01 Troubleshooting Once the test is complete, do one of the following: • If the system is to loopdown but remain Armed, send the IR LPDN code (universal loopdown). • If all the equipment is to be looped down, disarmed and returned to normal operation, send the disarm inband code 11100 or the ESF-DL code (FF24).

  • Page 60: A3Lb And A4Lb Test Procedures

    Troubleshooting 150-319-151-01, Revision 01 A3LB and A4LB Test Procedures The HLU-319 can be looped back by sending the Addressable Office Repeater (AOR) LPBK activation code 1111-1111-0001-1110 (FF1E) for at least 5 seconds. This causes the HLU-319 to enter the NLOC state. The Loopback Time-out setting (see “Setting the Loopback Time-out Option”...

  • Page 61: Appendix A - Specifications

    150-319-151-01, Revision 01 Appendix A - Specifications A - S PPENDIX PECIFICATIONS This appendix provides general specifications, pinout diagrams for the craft port and card-edge connector, HDSL insertion loss guidelines, and power consumption and dissipation tables. HDSL Line Code 784 kbps 2B1Q +13.5 dBm ±0.5 dB at 135 Ω...

  • Page 62: Hdsl Insertion Loss Guidelines

    1.54 (a) At 196 kHz, 68°F (20°C) A Windows-based program, Cable Calculator, may be downloaded from the Customer site portion of the PairGain web site at www.pairgain.com . If you don’t have a customer password, contact your sales representative. OWER...

  • Page 63: Power Consumption With Doublers

    150-319-151-01, Revision 01 Appendix A - Specifications Power Consumption with Doublers Table 18 through Table 24 list the power consumed and dissipated by the HLU-319 when it is used with any of the four basic doubler types in the HiGain family. The maximum current drawn by the CO supply is also listed. Table 18 through Table 20...

  • Page 64: Hlu-319 Power Parameters-Two Doublers (Hdu-451 List 3, 4, 3B Or 4B)

    Appendix A - Specifications 150-319-151-01, Revision 01 Table 21 through Table 23 show power parameters for two doubler, line-powered circuits on 9 kft, 26 AWG loops. Table 21. HLU-319 Power Parameters—Two Doublers (HDU-451 List 3, 4, 3B or 4B) HRU CPE 42.5 Vdc Power HRU Model No.

  • Page 65: Maximum Power Dissipation

    150-319-151-01, Revision 01 Appendix A - Specifications AXIMUM OWER ISSIPATION The Maximum Power Dissipation measures the power that is converted into heat that builds up within the unit. It contributes to the total heat generated in the space around the unit. It is used to determine the maximum number of fully loaded shelves per bay that does not exceed the maximum allowable power dissipation density in watts per square foot to comply with GR-63.

  • Page 66: Hlu-319 List 5A Card Connector

    The HLU-319 List 5A provides a Network Management Control Bus on pin 7 of the card-edge connector. This allows the various PairGain Management System protocols to manage the HLU through the HMU-319 HiGain Management Unit. Whenever the HLU-319 is under management, the MNGD message displays periodically on the HLU front-panel display.

  • Page 67: Fuse Alarm

    150-319-151-01, Revision 01 Appendix A - Specifications Fuse Alarm Pin 10 on the card-edge connector is a Fuse Alarm that is driven to -48 Vdc whenever its onboard fuse opens. It emulates the function of the Fuse Alarm output from Pin 10 on normal, high-density (HD) repeaters. Pin 10 is connected to pin 5 of the 1184 Alarm Card (slot 1 in the HD shelf) and causes the 1184 Fuse ALM LED to light when the pin 10 signal is activated.

  • Page 68: Craft Port

    Appendix A - Specifications 150-319-151-01, Revision 01 RAFT Figure 30 shows the pinout for the craft port connector and its connection to a DB-9 or DB-25 connector on a maintenance terminal. Figure 30. RS-232 Craft Port Pinouts September 17, 1999 HLU-319 List 5A...

  • Page 69: Appendix B - Functional Operation

    UNCTIONAL PERATION PairGain HDSL technology provides full-duplex services at standard T1 rates over copper wires between an HLU and an HRU, which comprise one HiGain system. HiGain systems use PairGain 2-Binary 1-Quartenary (2B1Q) HDSL transceiver systems to establish two, full-duplex, 784 kbps data channels between the HLU-319 and a remotely located HDU or HRU.

  • Page 70: Ground Fault Detect

    Appendix B - Functional Operation 150-319-151-01, Revision 01 ROUND AULT ETECT The HLU-319 has a Ground Fault Detect (GFD) circuit which detects a ground or a resistive path to ground on any wire of any loop of any span with a non-zero voltage. For low (-140 Vdc) applications, such a circuit is active during start-up by applying the bipolar voltage to the loops.

  • Page 71: Appendixc - Compatibility

    The HLU-319 List 5A is compatible with the following T1 repeater shelves and associated equipment: • PairGain HMS-317 (28-slot, 23-inch shelf) • PairGain HMS-319 (3-slot, 19-inch horizontal shelf) • PairGain HMS-308 (8-slot remote enclosure) • Charles Ind. #3192 (28-slot connectorized) •...
  • Page 72 Appendix C - Compatibility 150-319-151-01, Revision 01 Table 25. HiGain Doubler Deployment Matrix Maximum Number of Doublers Per Circuit HDU-451, List 3, 3B, 4, 4B HDU-437, 439 HDU-404, 407, 409 Line Powered Local Powered Line Powered Local Powered Line Powered Local Powered HLU Model HLU-231...

  • Page 73: Appendixd - Product Support

    PairGain Customer Service Group provides expert pre-sales and post-sales support and training for all its products. ECHNICAL UPPORT Technical assistance is available 24 hours a day, 7 days a week by contacting PairGain Customer Service Group at: 800.638.0031 or 714.832.9922 Telephone: The 800 telephone support line is toll-free in the U.S.
  • Page 74 Pack the equipment in a shipping carton. Write PairGain’s address and the Return Material Authorization (RMA) Number you received from the RMA Department clearly on the outside of the carton and return to: PairGain Technologies, Inc.

  • Page 75: Appendix E - Glossary

    150-319-151-01, Revision 01 Appendix E - Glossary E - G PPENDIX LOSSARY 2B1Q 2 Binary,1 Quaternary Enabled Alarm Cut Off Errored Seconds Alarm Indication Signal indicated by Extended SuperFrame transmission of an all ones pattern ALMP Alarm Pattern ESF DL Extended SuperFrame Data Link Alternate Mark Inversion HCDS...
  • Page 76 Appendix E - Glossary 150-319-151-01, Revision 01 Office Repeater Bay Super Frame Personal Communication Services SMJK SmartJack Payload Signal-to-Noise Ratio POTS Plain Old Telephone Service SPLB Special Loopback Pulse Position Modulation Span Terminating Shelf PWRF Power Feed Total Error Count Receive TLOS-LB Transmit Loss of Signal-Loopback...

  • Page 77: Certification And Warranty

    Do not try to repair the unit. If it fails, replace it with another unit and return the faulty unit to PairGain for repair. Any modifications of the unit by anyone other than an authorized PairGain representative voids the warranty.
  • Page 78 Corporate Office 14402 Franklin Avenue Tustin, CA 92780 Tel: 714.832.9922 Fax: 714.832.9924 For Technical Assistance: 800.638.0031...

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