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PairGain HIGAIN HLU-231 Manual

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PAIRGAIN TECHNOLOGIES
Technical Practice
Engineering - PLANT Series
P
AIR
List 6, PairGain #150-1111-06 CLEI Code: T1LIE1N4AA
CONTENTS
CAUTION
This product incorporates static sensitive components.
Proper electrostatic discharge procedures must be
followed.
Copyright © 1995, PairGain Technologies, Inc. PairGain and HiGain are trademarks of PairGain Technologies.
05
G
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AIN
ECHNOLOGIES
MODEL HLU-231 Issue 1
H
G
I
PAGE
2
2
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3
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4
4
8
12
14
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Figure 1. HLU-231, List 6 Front Panel. The PairGain
HLU-231 is the local unit used in conjunction with the
HRU-412 remote unit to provide a complete HiGain HDSL
system.
Section 150-231-106
L
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AIN
INE
NIT
Revision 05
February 3, 1995
Page 1

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Summary of Contents for PairGain HIGAIN HLU-231

  • Page 1: Table Of Contents

    Figure 1. HLU-231, List 6 Front Panel. The PairGain HLU-231 is the local unit used in conjunction with the HRU-412 remote unit to provide a complete HiGain HDSL system. Copyright © 1995, PairGain Technologies, Inc. PairGain and HiGain are trademarks of PairGain Technologies. Page 1...

  • Page 2: Product Overview

    HiGain provides a cost-effective, easy to deploy method for delivering T1 High Capacity 1.01 PairGain’s HiGain Line Unit Model HLU-231 Digital Service (HCDS) over metallic pairs. The fiber- Issue 1, List 6 (Figure 1) is the Central Office like quality service is deployed over two (CO) side of a repeaterless T1 transmission system.

  • Page 3: Certification

    This module should not be field repaired. If it fails, replace it with another unit and return Secondary surge protection on DS1 and HDSL the faulty unit to PairGain for repair. Any modifications ports of the unit by anyone other than an authorized Power cross protection on HDSL ports PairGain representative voids the warranty.

  • Page 4: Functional Description

    Figure 2. HRU-231, List 6 Block Diagram. PairGain’s HDSL technology provides full-duplex services at standard T-1 rates over copper wires between an HLU and an HRU, which comprise one HiGain system.
  • Page 5 Issue 1, Section 150-231-106 Revision 05 dissipation and its maximum current drain. These 6.05 The received HDSL channels are processed by the transceiver and then passed on to the three parameters for the HLU-231, on a per slot and HLU-231 multiplexer module. The multiplexer per shelf basis, are as follows: provides frame synchronization for each of the two Maximum Power Dissipation...
  • Page 6 HiGain Maintenance diskette minimum threshold value set by the dumb that is available from PairGain. The port is configured terminal MARGIN ALARM THRES; as as DCE with 8 data bits, 1 stop bit and no parity.
  • Page 7 Issue 1, Section 150-231-106 Revision 05 6.22 The HLU-231’s front panel tri-color STATUS Pressing the MODE button two more times yields the LED has the following states: CRE? (CREM) and CLO? (CLOC) customer loopback options respectively. This interactive button procedure •...

  • Page 8: System Option Settings

    Section 150-231-106 Revision 05 the HLU’s software version number, its List #, the type 7. SYSTEM OPTION SETTINGS of frame pattern being received from the DSX-1, the 7.01 The HLU-231 contains non-volatile RAM line code setting of the HLU and all 14 option settings. which stores the system option settings.
  • Page 9 Issue 1, Section 150-231-106 Revision 05 7.09 The other dumb terminal system settings are causes the AIS pattern to be transmitted at both T1 set in a similar manner. Simply enter the letter outputs when either of the two HDSL loops in parenthesis of the parameter to be changed.
  • Page 10 Section 150-231-106 Revision 05 TABLE 1. SYSTEM OPTION SETTINGS Mode Selection Description EXT* Replaces the internal equalizer with a 12 Vp/p driver for external equalizers. Sets Equalizer to DSX-1 for 0-133 feet. Sets Equalizer to DSX-1 for 133-266 feet. Sets Equalizer to DSX-1 for 266-399 feet. Sets Equalizer to DSX-1 for 399-533 feet.
  • Page 11 Issue 1, Section 150-231-106 Revision 05 Mode Selection Description AUTO The HLU and HRU independently monitor their incoming DS1 bit streams for the B8ZS pattern. If either unit detects this pattern, it enters its B8ZS mode. It reverts back to its AMI mode if no B8ZS patterns are received for 5 seconds.

  • Page 12: Loopback Design Description

    HiGain application includes the HLU, HRU & present for five seconds before HiGain responds. two in-line HDU-451 doublers. Refer to the PairGain Table 2 list the test procedures that apply when using HiGain Intelligent Repeater Application Note # 910 the GNLB mode.
  • Page 13 Issue 1, Section 150-231-106 Revision 05 Figure 4. HLU-231 Loopback Configurations. The most important of the HiGain family of loopback options is the Smart-Jack loopback, which emulates the functions of a standard NID. Page 13...

  • Page 14: Installation And Test

    If the equipment has been damaged in transit, immediately report the extent of damage to the transportation company and to PairGain. Figure 5. HLU-231, List 6 Pin-Outs. The active pins are highlighted in black in the above illustration. Page 14...

  • Page 15: Testing Procedures

    Issue 1, Section 150-231-106 Revision 05 10. TESTING PROCEDURES properly set. All installations should be set to the largest value that does not exceed the distance from 10.01 Tables 2 through 7 provide step-by-step test the DSX-1 to the shelf. procedures for the HLU-231 unit as a function of the loopback option selected.
  • Page 16 Section 150-231-106 Revision 05 TABLE 3. TEST PROCEDURES FOR A1LB OPTION Step Action Send into the HLU the inband ARMING and NIU (Network Interface Unit) LPBK code 11000 for at least 5 seconds, or at least 4 repetitions of the 16-bit ESF Data Link ARMING code 0001 0010 1111 1111.
  • Page 17 Issue 1, Section 150-231-106 Revision 05 TABLE 3. TEST PROCEDURES FOR A1LB OPTION (CONTINUED) Step Action Using the following codes, a network tester can activate loopbacks NLOC or NREM or SMJK (if enabled) shown in Figure 4. A customer tester can activate loopbacks CLOC or CREM. ADDRESSABLE 1 (A1LB) REPEATER LOOPBACK COMMANDS ARMING or NIU LPBK (inband) Arming code...
  • Page 18 Section 150-231-106 Revision 05 TABLE 4. TEST PROCEDURES FOR A2LB OPTION Step Action Send into the HLU the inband ARMING and NIU (Network Interface Unit) LPBK code 11000 for at least 5 seconds, or at least 4 repetitions of the 16-bit ESF Data Link ARMING code 0001 0010 1111 1111.
  • Page 19 Issue 1, Section 150-231-106 Revision 05 TABLE 4. TEST PROCEDURES FOR A2LB OPTION (CONTINUED) Step Action Using the following codes, a network tester can activate loopbacks NLOC or NREM or SMJK (if enabled) shown in Figure 4. A customer tester can activate loopbacks CLOC or CREM. ADDRESSABLE 2 (A2LB) REPEATER LOOPBACK COMMANDS ARMING or NIU LPBK (inband) Arming code...
  • Page 20 Section 150-231-106 Revision 05 TABLE 5. TEST PROCEDURES FOR A3LB OPTION Step Action The HiGain Line Unit can be looped back (NLOC in Figure 4) by sending the (Addressable Office Repeater) LPBK activation code 1111(F) 1111(F) 0001(1) 1110(E) for at least 5 seconds.
  • Page 21 Issue 1, Section 150-231-106 Revision 05 TABLE 6. TEST PROCEDURES FOR A4LB OPTION Step Action The HiGain Line Unit can be looped back (NLOC in Figure 4) by sending the (Addressable Office Repeater) LPBK activation code 1111(F) 1111(F) 0001(1) 1110(E) for at least 5 seconds.
  • Page 22 Section 150-231-106 Revision 05 TABLE 7. TEST PROCEDURES FOR A5LB OPTION Step Action Send into the HLU the inband ARMING and NIU (Network Interface Unit) LPBK code 11000 for at least 5 seconds, or at least 4 repetitions of the 16-bit ESF Data Link ARMING code 0001 0010 1111 1111.
  • Page 23 Issue 1, Section 150-231-106 Revision 05 TABLE 7. TEST PROCEDURES FOR A5LB OPTION (CONTINUED) Step Action Using the following codes, a network tester can activate loopbacks NLOC or NREM or SMJK (if enabled) shown in Figure 4. A customer tester can activate loopbacks CLOC or CREM. ADDRESSABLE 5 (A5LB) REPEATER LOOPBACK COMMANDS ARMING or NIU LPBK (inband) Arming code...
  • Page 24 Section 150-231-106 Revision 05 TABLE 8. HLU 4-CHARACTER FRONT PANEL MESSAGES Message Full Name Description CREM Customer Remote Loopback Signal from customer is looped back to customer at HLU- 231. NLOC Network Local Loopback DSX signal is looped back to DSX at HLU. CLOC Customer Local Loopback Signal from Customer is looped back to customer at...
  • Page 25 Issue 1, Section 150-231-106 Revision 05 TABLE 8. HLU 4 CHARACTER FRONT PANEL MESSAGES (CONTINUED) Message Full Name Description BAD RT? No response from HRU The HLU does not receive any response from the HRU. Thus, the HRU’s integrity is questionable. HLU Software Version # This is displayed during the System Settings review mode.
  • Page 26 Section 150-231-106 Revision 05 TABLE 9. HLU-231 STATUS MENU DEFINITIONS Message Full Name Description ALARMS NONE No Alarms LLOS Local Loss of Signal No signal from local T1 interface. RLOS Remote Loss of No signal from remote T1 interface. Signal LOSW1(2) Loss of Sync Word HDSL Loop 1 or Loop 2 has lost sync.
  • Page 27 Issue 1, Section 150-231-106 Revision 05 TABLE 10. GLOSSARY OF HIGAIN TERMS Term Definition MARGINS Indicates the excess signal to noise ratio, at either the HLU or HRU, relative to a 10 Error Rate. 1st value is current margin, 2nd value is minimum margin since (C)leared last, 3rd value is maximum value since cleared, and NA means Not Available.
  • Page 28 Section 150-231-106 Revision 05 Figure 6. HLU-231 Main Menu. Figure 7. HLU Span Status Display. Page 28...
  • Page 29 Issue 1, Section 150-231-106 Revision 05 Figure 8. System Settings Menu. Figure 9. Set Clock Menu. Page 29...
  • Page 30 Section 150-231-106 Revision 05 Figure 10. Performance Data. Figure 11. Performance Data History. Page 30...
  • Page 31 Issue 1, Section 150-231-106 Revision 05 Figure 12. HLU Alarm History. Figure 13. Loopback Menu. Page 31...

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