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PairGain T1L2B40A Manual

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H
G
L
U
I
AIN
INE
NIT
Model
List Number
Part Number
CLEI Code
HLU-319
5E
150-1140-55
T1L2B40A
P
G
T
, I
.
AIR
AIN
ECHNOLOGIES
NC
E
S
T
P
NGINEERING
ERVICES
ECHNICAL
RACTICE
S
150-319-155-04
ECTION

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Summary of Contents for PairGain T1L2B40A

  • Page 1 Model List Number Part Number CLEI Code HLU-319 150-1140-55 T1L2B40A ECHNOLOGIES NGINEERING ERVICES ECHNICAL RACTICE 150-319-155-04 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 inside the 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 150-319-155-04, Revision 04 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 5 150-319-155-04, Revision 04 Table of Contents Troubleshooting _____________________________________________________________________ 42 System Alarms ..........................42 Alarm Option for DLC Feed .....................43 Retiring System Alarms.....................43 Self Test ..........................43 Loopback Operation.........................44 Generic Loopback Commands ..................44 Special Loopback Commands ...................46 Initiating a Manual Loopback Session ................47 Loopback Test Procedures .......................48 General Troubleshooting Tips ...................48 GNLB Test Procedures......................48...
  • Page 6 Table of Contents 150-319-155-04, Revision 04 Appendix D - Product Support _________________________________________________________ 66 Technical Support..........................66 World Wide Web..........................66 Returns............................. 66 Appendix E - Glossary ________________________________________________________________ 68 Certification and Warranty ______________________________________________ Inside Back Cover September 20, 1999 HLU-319 List 5E...
  • Page 7 150-319-155-04, Revision 04 List of Figures IST OF IGURES 1. HLU-319 List 5E Front Panel .........................4 2. Installing the HLU-319 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 150-319-155-04, Revision 04 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 5E 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 150-319-155-04, Revision 04 Standard Features • Selectable DS1 pre-equalizer • Front-panel features: – Four-character status display – DS1 splitting and bridging access – Status LED – RS-232 craft port for connection to a maintenance terminal (ASCII terminal or a PC running a terminal emulation program) •...

  • Page 11: Higain Doubler Applications

    150-319-155-04, Revision 04 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 5E 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 150-319-155-04, Revision 04 RONT ANEL The HLU-319 List 5E front panel is shown in Figure 1. The front-panel components are described in Table 1 on page 5. For pinout diagrams of the HLU card-edge connector and the craft port, refer to “Appendix A - Specifications”...
  • Page 13 150-319-155-04, Revision 04 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 only remains on for 4 minutes.

  • Page 14: Front-Panel Display Messages

    Front Panel 150-319-155-04, Revision 04 Table 2 lists the front-panel display messages. The four-character displays 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 15 150-319-155-04, Revision 04 Front Panel Table 2. Front-panel Display Messages (Cont.) Message Full Name Description FERR Framing Bit Error Framing bit error occurred at HLU T1 input. FRM xxxx Frame: SF, ESF, UNFR, NONE Defines the type of frame pattern being received from the DSX-1: SuperFrame (SF), Extended SuperFrame (ESF), Unframed (UNFR), or NONE.

  • 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 into a Shelf When installing an HLU in a chassis, be sure to wear an antistatic wrist strap.

  • Page 17: Verification

    150-319-155-04, Revision 04 Installation ERIFICATION Once the HLU-319 is installed, verify that it is operating properly. To do this, you need to 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 150-319-155-04, Revision 04 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

    150-319-155-04, Revision 04 Provisioning ROVISIONING This is a reference section for HLU provisioning. There are two methods for provisioning the HLU-319 List 5E: • 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 150-319-155-04, Revision 04 Resetting to Factory Default Values All user 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

    150-319-155-04, Revision 04 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 150-319-155-04, Revision 04 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

    150-319-155-04, Revision 04 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 150-319-155-04, Revision 04 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

    150-319-155-04, Revision 04 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 150-319-155-04, Revision 04 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 5E local T1 input.

  • Page 27: Set Clock Screen

    150-319-155-04, Revision 04 Provisioning Table 7. Loopback Messages (Cont.) Message Full Name Description NREM Network Remote Loopback Loopback at HRU to network initiated from CO (network) by ILR #2 code, the MODE and SEL buttons on the HLU-319 front panel, the HRU manual loopback button, or by the maintenance terminal.

  • Page 28: System Settings Screen

    Provisioning 150-319-155-04, Revision 04 Set Date To set the system date, type the month, day and year in a mm/dd/yy format, then press (17(5 . The Update Remote field appears. When editing entries in the Set Clock screen and when using the Terminal emulation program %$&.63$&( in Windows 3.1, pressing the key deletes two characters instead of just one.

  • Page 29: Hlu-319 List 5E System Settings Options

    150-319-155-04, Revision 04 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 5E System Settings Options Front Panel System Settings Display Selection Description Screen Options Code Equalization...
  • Page 30 Provisioning 150-319-155-04, Revision 04 Table 8. HLU-319 List 5E System Settings Options (Cont.) Front Panel System Settings Display Selection Description Screen Options Code Loopback Timeout LBTO NONE Disables automatic timeout cancellation of all loopbacks. Sets automatic cancellation of all loopbacks to 20 minutes after initiation.
  • Page 31 150-319-155-04, Revision 04 Provisioning Table 8. HLU-319 List 5E System Settings Options (Cont.) Front Panel System Settings Display Selection Description Screen Options Code RLOS (DS1 LOS) Alarm Prevents a remote DS1 LOS condition at the input to the HRU from causing an LOS alarm.
  • Page 32 Provisioning 150-319-155-04, Revision 04 BPVT Option The HLU-319 List 5E improves HiGain’s compatibility with Digital Loop Carrier (DLC) feeder applications because of its ability to transmit T1 BPV occurrences between its T1 interfaces. This feature is required to support protection switching in DLC applications. Each DLC terminal must be able to monitor the integrity of its Receive T1 payload and then switch to the protected line when the integrity of the path drops below specific user-selected limits.
  • Page 33 150-319-155-04, Revision 04 Provisioning If DS0 blocking is invoked in a HiGain system that has an earlier version HRU that does not support the blocking option, blocking only occurs at the DSX-1 output of the HLU-319 List 5E. The HRU DS1 output is not blocked. Also, all blocked channels are temporarily unblocked for all HiGain system loopback tests for all DS1 blocking settings.

  • Page 34: Loopback Mode Screen

    Provisioning 150-319-155-04, Revision 04 one-conductor loop drops from 5 to 10 dB. Therefore, if the Margin alarm is set to 5 dB below the normal margin at turn-up, when one conductor does open, a system alarm occurs and causes the AIS/LOS condition. This alerts the maintenance personnel of the problem.
  • Page 35 150-319-155-04, Revision 04 Provisioning Table 9. Loopback Field Messages and Descriptions Messages Full Name Description NREM Network Remote Loopback Loopback at HRU (remote) towards network. NLOC Network Local Loopback Loopback at HLU (local) towards network. CLOC Customer Local Loopback Loopback at HRU (local) towards CI. CREM Customer Remote Loopback Loopback at HLU (remote) towards CI.

  • Page 36: Loopback Menu: Four Doublers

    Provisioning 150-319-155-04, Revision 04 Loopback Menu for Doubler Applications LOOPBACK MENU TIME: 00:03:33 DATE: 09/15/99 CIRCUIT ID#: A. DISABLE LOOPBACKS B. NETWORK LOOP HLU (NLOC) M. NETWORK LOOP DOUBLER 4 (NDU4) C. NETWORK LOOP HRU (NREM) N. CUSTOMER LOOP DOUBLER 4 (CDU4) D.

  • Page 37: View Performance Data Screen

    150-319-155-04, Revision 04 Provisioning HI-GAIN HLU-319 MAINTENANCE TERMINAL MAIN MENU (ver V7.2L-5E) CIRCUIT ID#: A. VIEW SPAN STATUS B. SET CLOCK C. SYSTEM SETTINGS D. LOOPBACK MODE: NLOC E. VIEW PERFORMANCE DATA F. VIEW PERFORMANCE HISTORY G. VIEW ALARM HISTORY H.

  • Page 38: Performance Data Screen: No Doubler

    Provisioning 150-319-155-04, Revision 04 & All Performance Data counters can be set to zero by pressing (Clear) from the HLU-319 Span Status screen shown in Figure 5 on page 16. The HLU-319 is considered the master module; it clears all performance data screens at both the HLU-319 and the HRU. Counters can not be cleared by accessing the HRU craft port.

  • Page 39: View Performance History Screen

    150-319-155-04, Revision 04 Provisioning Performance Data Screen for Doubler Applications Figure 13 is an example of a Performance Data screen that lists performance data for the fifth span (HDU4 to the HRU). Date: 09/15/99 SPAN 5 PERFORMANCE DATA CIRCUIT ID#: ERRORED SECONDS/UNAVAILABLE SECONDS HDSL-1 HDSL-2...

  • Page 40: Day Performance History Screen: No Doubler

    Provisioning 150-319-155-04, Revision 04 Performance History Screen without Doubler Figure 14 shows a non-doubler application. Time: 00:27:46 PERFORMANCE HISTORY - 31 DAY CIRCUIT ID#: ERRORED SECONDS/UNAVAILABLE SECONDS HDSL-1 HDSL-2 01/17 -----/----- -----/----- -----/----- -----/----- -----/----- -----/----- 01/18 -----/----- -----/----- -----/----- -----/----- -----/----- -----/----- 01/19 -----/----- -----/----- -----/----- -----/----- -----/----- -----/----- 01/20...

  • Page 41: Day Performance History Screen: Four Doublers (Span 5)

    150-319-155-04, Revision 04 Provisioning 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. Time: 00:26:29 SPAN 5 PERFORMANCE HISTORY - 31 DAY CIRCUIT ID#: ERRORED SECONDS/UNAVAILABLE SECONDS HDSL-1...

  • Page 42: View Alarm History Screen

    Provisioning 150-319-155-04, Revision 04 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 35) the: •...

  • Page 43: Alarm History Screen: No Doubler

    150-319-155-04, Revision 04 Provisioning Alarm History Screen without a Doubler ALARM HISTORY TIME: 00:27:54 DATE: 09/15/99 CIRCUIT ID#: Type First Last Current Count LOS, DS1-HLU LOS, DS1-HRU AIS, DS1-HLU AIS, DS1-HRU SPAN1 LOSW, HDSL1 09/15/99-00:00 09/15/99-00:00 SPAN1 LOSW, HDSL2 09/15/99-00:00 09/15/99-00:00 SPAN1 MARGIN L1 SPAN1 MARGIN L2...

  • Page 44: View System Inventory Screen

    Provisioning 150-319-155-04, Revision 04 View System Inventory Screen The System Inventory screen (Figure 18 on page 37) 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 45: System Inventory Screen: No Doubler

    150-319-155-04, Revision 04 Provisioning System Inventory Screen without Doubler SYSTEM INVENTORY TIME: 00:27:59 DATE: 09/15/99 A. CIRCUIT ID: UNIT PRODUCT UNIT ID HLU-319 L5E V7.2 NOT REQUIRED B. HRU HRU-402 L1A V1.3 Remote Unit C. DB1 D. DB2 F. DB3 G.

  • Page 46: View Troubleshooting Screen

    Provisioning 150-319-155-04, Revision 04 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 47: Troubleshooting With Help

    150-319-155-04, Revision 04 Provisioning 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. Legend symbols which appear in parentheses are also keyboard commands.

  • Page 48: Troubleshooting With Margin Values

    Provisioning 150-319-155-04, Revision 04 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 49: Troubleshooting With 24-Hour Errored Seconds (Es)

    150-319-155-04, Revision 04 Provisioning 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 50: Troubleshooting

    Troubleshooting 150-319-155-04, Revision 04 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 38).

  • Page 51: Alarm Option For Dlc Feed

    150-319-155-04, Revision 04 Troubleshooting 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 52: Loopback Operation

    Troubleshooting 150-319-155-04, Revision 04 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 53 150-319-155-04, Revision 04 Troubleshooting Table 13. Summary of HiGain Loopback Codes Method of Transmission Loopback Code Description Test Set Craft Port MODE/SEL NLOC 1111000 Network Local. Invokes HLU loopback toward the network. 4-in-7 NDU1 110000 Network Doubler 1. Invokes HDU1 loopback toward the network.

  • Page 54: Special Loopback Commands

    Troubleshooting 150-319-155-04, Revision 04 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 55: Initiating A Manual Loopback Session

    150-319-155-04, Revision 04 Troubleshooting 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 45 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 56: Loopback Test Procedures

    Troubleshooting 150-319-155-04, Revision 04 You can terminate loopbacks manually and exit the MAN LPBK mode by simultaneously pressing the MODE and SEL buttons for 3 or more seconds. If no loopback is active, the MAN LPBK mode automatically terminates after 30 seconds. All loopbacks can be initiated by inband commands in the T1 payload or by a command from the HiGain system (front-panel buttons or maintenance screen selections).
  • Page 57 150-319-155-04, Revision 04 Troubleshooting Figure 28. Loopback Configurations HLU-319 List 5E September 20, 1999...

  • Page 58: A1Lb, A2Lb, And A5Lb Test Procedures

    Troubleshooting 150-319-155-04, Revision 04 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 59 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 60 Troubleshooting 150-319-155-04, Revision 04 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 61: A3Lb And A4Lb Test Procedures

    150-319-155-04, Revision 04 Troubleshooting 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 62: Appendix A - Specifications

    Appendix A - Specifications 150-319-155-04, Revision 04 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. 784 kbps 2B1Q HDSL Line Code +13.5 dBm ±0.5 dB at 135 Ω...

  • Page 63: 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 64: Power Consumption With Doublers

    Appendix A - Specifications 150-319-155-04, Revision 04 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 65: Hlu-319 Power Parameters-Two Doublers (Hdu-451 List 3, 4, 3B Or 4B)

    150-319-155-04, Revision 04 Appendix A - Specifications 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 66: Maximum Power Dissipation

    Appendix A - Specifications 150-319-155-04, Revision 04 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 67: Hlu-319 List 5E Card Connector

    The HLU-319 List 5E 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. When the HLU-319 is under management, the MNGD message displays periodically on the HLU-319 List 5E front-panel display.

  • Page 68: Fuse Alarm

    Appendix A - Specifications 150-319-155-04, Revision 04 Fuse Alarm Pin 10 on the card-edge connector is a Fuse Alarm that is driven to -48 V when 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 69: Craft Port

    150-319-155-04, Revision 04 Appendix A - Specifications 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 HLU-319 List 5E September 20, 1999...

  • Page 70: 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 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 71: Ground Fault Detect

    150-319-155-04, Revision 04 Appendix B - Functional Operation ROUND AULT ETECT The HLU-319 List 5E 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. The circuit is not activated during low voltage mode (0 Vdc and -140 Vdc).

  • Page 72: Appendixc - Compatibility

    The HLU-319 List 5E is designed to mount in the following shelves with 3192 mechanics: • PairGain HMS-317 (28-slot, 23-inch shelf) • PairGain HMS-318 (22-slot, 19-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 73 150-319-155-04, Revision 04 Appendix C - Compatibility 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 74: 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 75 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 76: Appendix E - Glossary

    Appendix E - Glossary 150-319-155-04, Revision 04 E - G PPENDIX LOSSARY 2B1Q 2 Binary,1 Quaternary ENFT Enable Fractional T1 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...
  • Page 77 150-319-155-04, Revision 04 Appendix E - Glossary PWRF Power Feed SPLB Special Loopback Receive Span Terminating Shelf Remote DS1 Alarm Total Error Count RLOS Remote Loss of Signal TLOS Transmit Loss of Signal-Loopback Return Material Authorization TSEC Total System Error Count SAIS SmartJack AIS Unavailable Seconds...

  • Page 79: 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 80 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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