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PairGain T1L2N20A Manual

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Model
HLU-388
E
NGINEERING
H
G
L
I
AIN
INE
List Number
5A
HLU 388
H G
HD
I AIN
5A
L
M
A
R
G
I
N
(dB)
SETUP
MODE SEL
STATUS
RS
232
DCE
P
G
T
AIR
AIN
ECHNOLOGIES
S
ERVICES
S
150-388-151-01
ECTION
U
NIT
Part Number
150-1141-51
, I
.
NC
T
P
ECHNICAL
RACTICE
CLEI Code
T1L2N20A

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Summary of Contents for PairGain T1L2N20A

  • Page 1 Model List Number Part Number CLEI Code HLU-388 150-1141-51 T1L2N20A HLU 388 I AIN (dB) SETUP MODE SEL STATUS ECHNOLOGIES NGINEERING ERVICES ECHNICAL RACTICE 150-388-151-01 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 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 150-388-151-01, Revision 01 ABLE OF ONTENTS Overview ____________________________________________________________________________ 1 Features.............................. 1 Product Enhancements ......................1 Standard Features........................ 1 Compatibility............................. 2 Applications............................2 HiGain Doubler Applications ..................... 3 Personal Communications System Applications ..............3 Front Panel __________________________________________________________________________ 4 Installation ___________________________________________________________________________ 8 Verification............................
  • Page 5 150-388-151-01, Revision 01 Table of Contents Troubleshooting _____________________________________________________________________ 43 System Alarms ..........................43 Alarm Option for DLC Feed .....................44 Retiring System Alarms.....................44 Self Test ..........................44 Loopback Operation.........................45 Generic Loopback Commands ..................45 Special Loopback Commands ...................47 Manual Loopback Session....................48 Loopback Test Procedures .......................49 General Troubleshooting Tips ...................49 GNLB Test Procedures......................49 A1LB, A2LB, and A5LB Test Procedures................51...
  • Page 6 List of Figures 150-388-151-01, Revision 01 IST OF IGURES 1. HLU-388 List 5A Front Panel ........................4 2. Installing the HLU-388 List 5A into a Shelf ....................8 3. Maintenance Terminal Main Menu ......................15 4. System Spans ..............................16 5.
  • Page 7 150-388-151-01, Revision 01 List of Tables IST OF ABLES 1. HDSL Loss Over Cables ..........................2 2. Front-panel Description............................5 3. Front-Panel Display Messages .........................6 4. Navigational Keys on the Maintenance Terminal ..................14 5. Maintenance Terminal Screens ........................15 6. Span Status Fields and Descriptions.......................19 7.
  • Page 8 List of Tables 150-388-151-01, Revision 01 viii September 15, 1999 HLU-388 List 5A...

  • Page 9: Overview

    Overview VERVIEW ® ® The PairGain HiGain Line Unit HLU-388 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: Compatibility

    Overview 150-388-151-01, Revision 01 • Compatible with Double Dual Module Plus (DDM+) high-density shelves • Selectable loopback activation codes • Network Management and Administration (NMA) interface • Lightning and power cross protection on HDSL interfaces • Full duplex 2B1Q HDSL transmission on two pairs at 784 kbps •...

  • Page 11: Higain Doubler Applications

    150-388-151-01, Revision 01 Overview In general, HiGain systems: • Operate with any number of other T1, POTS, Digital Data Service (DDS), or other HiGain systems sharing the same cable binder group. • Can be used with customers requiring DS1 service on a temporary or permanent basis. •...

  • Page 12: Front Panel

    List number HiGain HD Front-panel display CLEI/ECI bar code label (dB) Setup buttons SETUP MODE SEL Status LED STATUS RS-232 craft port (210 jack) PAIRGAIN Configuration number Figure 1. HLU-388 List 5A Front Panel September 15, 1999 HLU-388 List 5A...
  • Page 13 150-388-151-01, Revision 01 Front Panel Table 2. Front-panel Description Front-panel Feature Function 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. Using the MODE or SEL buttons reactivates the display and restarts the 4-minute timer. Refer to Table 3 on page 6 for a listing of the four-character messages.

  • Page 14: Front-Panel Display Messages

    Front Panel 150-388-151-01, Revision 01 Table 3 lists the front-panel display messages. The four-character display reports the code of a pertinent alarm, loopback, or diagnostic message. The four-character display in some cases is followed by a second four-character message that modifies the first with a value or current configuration setting. The front-panel display turns on when power is initially applied to the HLU-388.
  • Page 15 150-388-151-01, Revision 01 Front Panel Table 3. Front-Panel Display Messages (Cont.) Message Full Name Description CODE xxxx Line Code: AMI, B8ZS, AUTO The line code that HLU-388 List 5A is receiving at its DSX-1 interface, if the DS1 option is set to Auto. Otherwise, it mimics either of the other two DS1 line code settings, Alternate Mark Inversion (AMI) or Bipolar with 8-zero Substitution (B8ZS).

  • Page 16: Installation

    Upon receipt of the equipment, 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. When installing an HLU in a chassis, be sure to wear an antistatic wrist strap. Avoid touching components on the circuit board.

  • Page 17: Verification

    150-388-151-01, Revision 01 Installation ERIFICATION Once the HLU-388 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 3 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 150-388-151-01, Revision 01 Verify that a valid T1 signal has been applied to the HLU and the HRU. • If no T1 signal is being applied to either the HLU or the HRU inputs, then the appropriate T1 alarms (LLOS or RLOS) are observed on the front-panel display and the status LED flashes red.

  • Page 19: Provisioning

    150-388-151-01, Revision 01 Provisioning ROVISIONING This is a reference section for HLU provisioning. There are two methods for provisioning the HLU-388 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 150-388-151-01, Revision 01 Resetting to Factory Default Values All user options (Table 9 on page 23) 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

    150-388-151-01, Revision 01 Provisioning SING A AINTENANCE ERMINAL Connecting to a Maintenance Terminal A miniature, 3-pin, 210 Bantam-type jack on the front panel serves as a craft port and allows connection between the HLU-388 and a maintenance terminal (ASCII terminal or PC running a terminal emulation program). A 210 to DB-9 adapter is provided with every unit to facilitate the use of standard RS-232, DB-9 cables (see Figure 30 on page...

  • Page 22: Accessing The Maintenance Terminal Screens

    Provisioning 150-388-151-01, Revision 01 Accessing the Maintenance Terminal Screens The following sections describe how to use the Maintenance Terminal screens to view, provision, and diagnose an HLU-388 List 5A system. Navigation Keys Table 4 lists the keys you can use on the maintenance terminal to navigate the Maintenance Terminal screens. Table 4.

  • Page 23: Maintenance Terminal Main Menu

    150-388-151-01, Revision 01 Provisioning 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 5. To access a screen, type the letter shown next to the menu item.

  • Page 24: Using The Maintenance Terminal Screens

    Provisioning 150-388-151-01, Revision 01 Selecting a Maintenance Terminal Function To perform a function within the Maintenance Terminal screens: • Press the key indicated to the left of the selection. • Press the letter in parentheses for the parameter to be changed. An invalid entry produces the following message and identifies the name of a field where the invalid entry occurred: >...

  • Page 25: Span Status Screen: No Doubler

    150-388-151-01, Revision 01 Provisioning • Press to view the next available span (for doubler applications). • Press to exit and return to the previous screen. • Press to select a specific span (for doubler applications). Span Status Screen without Doublers SPAN STATUS TIME: 00:27:25 DATE: 08/15/99...

  • Page 26: Span Status Screen: Four Doublers (Span 5)

    Provisioning 150-388-151-01, Revision 01 Span Status Screen for Doubler Applications If doublers have been added, status is also reported for these. Span Status can have up to five screens, depending on the number of HDUs. SPAN 5 STATUS TIME: 12:06:04 Circuit ID#: DATE: 08/15/99 ALARMS:...

  • Page 27: Span Status Fields And Descriptions

    150-388-151-01, Revision 01 Provisioning Table 6 lists the Span Status fields and descriptions. Table 7 Table 8 on page 20 describe alarm and loopback messages displayed on the Span Status screens. Table 6. Span Status Fields and Descriptions Span Status Field Description Time Time of day when Span Status was checked.

  • Page 28: Loopback Messages

    Provisioning 150-388-151-01, Revision 01 Table 7. HDSL System Alarms Message Name Description Bit Error Rate The System Error Count (SEC) 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-388 List 5A local T1 input.

  • Page 29: Set Clock Screen

    150-388-151-01, 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: 08/15/99 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 30: System Settings Screen

    Provisioning 150-388-151-01, Revision 01 System Settings Screen The options set from the System Settings screen are the same as the options set through the HLU-388 front-panel Mode and SEL buttons (except for Margin Alarm Threshold and DS0 Blocking, which can only be set at this screen).
  • Page 31 150-388-151-01, Revision 01 Provisioning Table 9 describes the System Settings options and lists the corresponding front-panel display codes. Factory default parameters appear in boldface type. Table 9. HLU-388 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 32 Provisioning 150-388-151-01, Revision 01 Table 9. HLU-388 List 5A System Settings (Cont.) Front-panel System Settings Display Parameter Description Screen Options Code DS1 Line Code 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 33 150-388-151-01, Revision 01 Provisioning Table 9. HLU-388 List 5A System Settings (Cont.) Front-panel System Settings Display Parameter Description Screen Options Code Bipolar Violation BPVT Enables BPVs and HDSL CRC errors at the DS1 input to be converted into DS1 Transparency BPVs at the distant end’s DS1 output.
  • Page 34 Provisioning 150-388-151-01, 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 35 150-388-151-01, Revision 01 Provisioning Margin Alarm Threshold Option To set the Margin Alarm Threshold: Select from the System Settings Main Menu screen. Enter the desired minimum acceptable alarm threshold from the 0 to 15 dB range. This causes a system alarm to occur if either the margin on HDSL Loop 1 (MAL1) or Loop 2 (MAL2) drops below the selected threshold value.

  • Page 36: Loopback Mode Screen

    Provisioning 150-388-151-01, Revision 01 If the HLU-388 is used with the HRU-411 to power PCS sites, the PWRF option should be set to AUTO. This causes the HLU to automatically detect the need to switch to the HIGH power feed mode when it receives a request from the HRU to do so.

  • Page 37: Loopback Menu: Four Doublers

    150-388-151-01, Revision 01 Provisioning Loopback Menu without Doubler LOOPBACK MENU TIME: 00:15:34 DATE: 08/15/99 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 38 Provisioning 150-388-151-01, Revision 01 Initiating a Loopback To send one of the available loopbacks, press the appropriate letter in the Loopback Menu. The following prompt appears: < PERFORM SELECTED LOOPBACK ( Type < to continue with the loopback selection. The following message appears: PLEASE WAIT....

  • Page 39: View Performance Data Screen

    150-388-151-01, 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 40: Performance Data Screen: No Doubler

    Provisioning 150-388-151-01, 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-388 and the HRU. Invalid report entries are indicated by dashes. Date: 08/15/99 PERFORMANCE DATA CIRCUIT ID#:...

  • Page 41: View Performance History Screen

    150-388-151-01, 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 42: Day Performance History Screen: Four Doublers (Span 5)

    Provisioning 150-388-151-01, 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 43: View Alarm History Screen

    150-388-151-01, 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 36), the: •...

  • Page 44: Alarm History Screen: No Doubler

    Provisioning 150-388-151-01, Revision 01 Alarm History Screen without Doubler ALARM HISTORY TIME: 00:27:54 DATE: 08/15/99 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 45: System Inventory Screen

    150-388-151-01, Revision 01 Provisioning System Inventory Screen The System Inventory screen (Figure 19 on page 38) 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 46: System Inventory Screen: No Doubler

    Provisioning 150-388-151-01, Revision 01 System Inventory Screen without Doubler SYSTEM INVENTORY TIME: 04:17:37 DATE: 08/15/99 A. CIRCUIT ID: UNIT PRODUCT SERIAL NUMBER UNIT ID HLU-388 L5A V7.2 ..000004 NOT REQUIRED B. HRU HRU-402 V1.5 3499000400 C. DB1 D. DB2 F. DB3 G.

  • Page 47: View Troubleshooting Screen

    150-388-151-01, Revision 01 Provisioning View Troubleshooting Screen The Troubleshooting screen graphically analyzes the circuit and identifies 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 48: Troubleshooting With Help

    Provisioning 150-388-151-01, Revision 01 To display the circuit Help diagram (Figure 22), press . The symbols 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. Those legend symbols that appear in parentheses are also keyboard commands for obtaining additional information.

  • Page 49: Troubleshooting With Margin Values

    150-388-151-01, Revision 01 Provisioning Press to display margin values for the circuit (Figure 23). TIME: 01:34:51 TROUBLESHOOTING with MARGIN VALUES DATE: 08/15/99 CIRCUIT ID#: >>>>| |=======| |=======| |=======| |=======| |=======| |>>>> <<<<| |=======| |=======| |=======| |=======| |=======| |<<<< |___|23 22|___|21 22|___|22 23|___|24 22|___|22...

  • Page 50: Troubleshooting With 24 Hour Errored Seconds (Es)

    Provisioning 150-388-151-01, Revision 01 Press & to display the HDSL errored seconds, or press to display the DS1 errored seconds for the circuit (Figure 25). TIME: 01:35:04 TROUBLESHOOTING with 24 HOUR ES DATE: 08/15/99 CIRCUIT ID#: 001 | |009 002| |009 001| |005 002| |005 002|...

  • Page 51: Troubleshooting

    150-388-151-01, 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 39.) YSTEM LARMS...

  • Page 52: Alarm Option For Dlc Feed

    Troubleshooting 150-388-151-01, Revision 01 Alarm Option for DLC Feed To improve HiGain compatibility with the switch-to-protect features used in DLC feeder applications, the HLU-388 has an Alarm Pattern Option (ALMP) that allows you to select either an AIS or LOS T1 output payload for the following alarms: •...

  • Page 53: Loopback Operation

    150-388-151-01, 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 54 Troubleshooting 150-388-151-01, Revision 01 Table 14. 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 55: Special Loopback Commands

    150-388-151-01, 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 9 on page 23) or by using the MODE and SEL buttons (see...

  • Page 56: Manual Loopback Session

    Troubleshooting 150-388-151-01, Revision 01 Manual Loopback Session A manual loopback session allows you to select any one of the HiGain GNLB loopbacks listed in Table 14 on page 46 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 57: Loopback Test Procedures

    150-388-151-01, Revision 01 Troubleshooting 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 58 Troubleshooting 150-388-151-01, Revision 01 Loopbacks Toward Network TLOS* HRU-412 HRU-412 HDSL SPAN All ones LOGIC HRU-412 SMJK* SMJK* SMJK* HRU-412 HRU-412 HDSL SPAN 2-in-5 All ones 11000 HRU-412 NREM NREM* HRU-412 HRU-412 HRU-412 HRU-412 HDSL SPAN 3 in 7 3-in-7 All ones 1110000 1110000...

  • Page 59: A1Lb, A2Lb, And A5Lb Test Procedures

    150-388-151-01, Revision 01 Troubleshooting A1LB, A2LB, and A5LB Test Procedures Using the codes listed in Table 15, 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 15 can also be initiated from the HLU-388 front panel MODE and SEL buttons (see “Setting Options...
  • Page 60 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 61 150-388-151-01, Revision 01 Troubleshooting Once the test is complete, do one of the following: • If the system is to loop down 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 62: A3Lb And A4Lb Test Procedures

    Troubleshooting 150-388-151-01, Revision 01 A3LB and A4LB Test Procedures The HLU-388 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-388 to enter the NLOC state. The Loopback Time-out setting (see “Setting the Loopback Time-out Option”...

  • Page 63: Appendix A - Specifications

    150-388-151-01, 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 64: Hdsl Insertion Loss Guidelines

    (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 do not have a customer password, contact your PairGain sales representative.

  • Page 65: Power Consumption With Doublers

    150-388-151-01, Revision 01 Appendix A - Specifications Power Consumption with Doublers Table 19 through Table 25 list the power consumed and dissipated by the HLU-388 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 19 through Table 21...

  • Page 66: Hlu-388 Power Parameters-Two Doublers (Hdu-451 List 3, 4, 3B Or 4B)

    Appendix A - Specifications 150-388-151-01, Revision 01 Table 22 through Table 24 show power parameters for two doubler, line-powered circuits on 9 kft, 26 AWG loops. Table 22. HLU-388 Power Parameters—Two Doublers (HDU-451 List 3, 4, 3B or 4B) HRU CPE -42.5 Vdc Power HRU Model No.

  • Page 67: Maximum Power Dissipation

    150-388-151-01, 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 68: Hlu-388 List 5A Card Connector

    The HLU-388 List 5A provides a Network Management Control Bus on pin 104 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-388 is under management, the MNGD message displays periodically on the HLU-388 List 5A front-panel display.

  • Page 69: Craft Port

    150-388-151-01, Revision 01 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. Terminal DB-9 connector (DTE) HLU-388 DB-9 connector (DCE) RD (Receive Data) Ring TD (Transmit Data) jack...

  • 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 2-Binary 1-Quartenary (2B1Q) HDSL transceiver systems to establish two, full-duplex, 784 kbps data channels between the HLU-388 and a remotely located HDU or HRU.
  • Page 71 150-388-151-01, Revision 01 Appendix B - Functional Operation When the circuit is active, the system is compliant with Class A2 requirements of GR-1089. When the circuit is not active, the system is compliant with Class A3 requirements of GR-1089. When the GFD circuit detects a grounded loop, the line power is immediately removed from the spans and a PWR FEED GND alarm is generated and displayed.

  • Page 72: Appendix C - Compatibility

    EPEATER HELVES AND ELATED QUIPMENT The HLU-388 List 5 is compatible with the following DDM+ T1 repeater shelves and associated equipment: • PairGain HCS-402, two-slot shelf with #150-1193-01 adapter • Shelf (23-inch) – Larus FT2 1188 (28-slot, connectorized) – AT&T DS1 Ext. (28-slot, connectorized) •...
  • Page 73 150-388-151-01, Revision 01 Appendix C - Compatibility Table 26. 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 - Glossary

    Appendix D - Glossary 150-388-151-01, Revision 01 D - G PPENDIX LOSSARY 2B1Q 2 Binary,1 Quaternary Digital Signal, level 1 Alarm Cutoff Equipment Catalog Item Alarm Indication Signal indicating transmission Enabled of an all ones pattern ALMP Alarm Pattern ENFT Enable Fractional T1 Alternate Mark Inversion Errored Seconds...
  • Page 75 150-388-151-01, Revision 01 Appendix D - Glossary NLOC Network Local Loopback Return Material Authorization Network Management and Administration SAIS SmartJack AIS NREM Network Remote Loopback Super Frame NVRAM Non-Volatile Random Access Memory SMJK SmartJack Office Repeater Bay Signal-to-Noise Ratio Personal Communications System SPLB Special Loopback Payload...

  • Page 76: Appendixe - 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: Telephone: 800.638.0031 or 714.832.9922 The 800 telephone support line is toll-free in the U.S.
  • Page 77 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 78 Appendix E - Product Support 150-388-151-01, Revision 01 September 15, 1999 HLU-388 List 5A...

  • 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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