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PAIRGAIN TECHNOLOGIES

Section 150-388-124

Technical Practice

Revision 01

Engineering - PLANT Series

June 21, 1996

Page 1

AIN

INE

NIT

MODEL HLU-388

List #

Part Number

CLEI Code

150-1141-24

T1L2BBBAAA

CONTENTS

PAGE

A. PRODUCT OVERVIEW

DESCRIPTION AND FEATURES

HIGAIN SYSTEM APPLICATIONS

FUNCTIONAL OPERATION

ALARMS

SYSTEM OPTIONS

HDSL LINE VOLTAGE OPTION

INSTALLATION

SPECIFICATIONS

CERTIFICATION

10. WARRANTY

11. TECHNICAL ASSISTANCE

B. APPLICATIONS WITHOUT HIGAIN

DOUBLERS (HDU-451)

12. SECTION INTRODUCTION

13. POWER CONSUMPTION

14. LOOPBACK OPERATION

15. TESTING

16. SYSTEM MAINTENANCE MENU

SCREENS

C. APPLICATIONS USING HIGAIN DOUBLERS

(HDU-451)

17. DOUBLER DEPLOYMENT RULES

18. POWER CONSUMPTION

19. LOOPBACK OPERATION

20. TESTING

21. SYSTEM MAINTENANCE MENU

SCREENS

Figure 1. HLU-388, List 2D Front Panel.

The PairGain

HLU-388 is the local unit used in conjunction with the HRU-412
remote unit to provide a complete HiGain HDSL system.

CAUTION

This product incorporates static sensitive

components. Proper electrostatic discharge

procedures must be followed.

Summary of Contents for 150-1141-24

Page 1: ...CHNICAL ASSISTANCE 12 B APPLICATIONS WITHOUT HIGAIN DOUBLERS HDU 451 12 SECTION INTRODUCTION 13 13 POWER CONSUMPTION 13 14 LOOPBACK OPERATION 14 15 TESTING 15 16 SYSTEM MAINTENANCE MENU SCREENS 28 C A...

Page 2: ...rminating Shelf STS high density shelves Selectable loopback activation codes RS 232 maintenance port Compatible with PairGain Management System Non volatile front panel operator setup Lightning and p...

Page 3: ...704 bits 6 milliseconds in length The HDSL frames contain a 14 bit Frame Sync Word FSW 6 bit Cyclic Redundancy Check CRC 21 bit operations channel and DSX 1 payload The DSX 1 stream is separated into...

Page 4: ...r bipolar 65 V and 100 V see Figure 5 The line power supply can be turned on or off by the microprocessor and is automatically shut down in the presence of line short circuits or microprocessor failur...

Page 5: ...defines the cause of the alarm remains Both messages remain until the alarm condition clears or another alarm occurs Disabling the ALM also retires an ACO condition 4 03 Pin 117 MJF is driven to 48 V...

Page 6: ...the SEL button for six seconds until the message DFLT NO appears To set the default values press the SEL button while the DFLT NO message is displayed DFLT YES will be displayed indicating the factory...

Page 7: ...e press E to Exit and C to Confirm the changes This activates the new choices and returns control to the Main Menu screen 5 11 The new T1 transceiver chip in the List 2D allows the unit to process bot...

Page 8: ...epeater in band loopback codes PWRF DIS Disables powering to the HRU 412 and doubler ENA Enables powering to the HRU 412 and doubler ZBTS ON Tells the HiGain system that the ESF frame is operating in...

Page 9: ...signal at both the HLU 388 List 2D and HRU 412 T1 output ports when both of the HDSL loops are not in sync LOSW 1LP Causes the HiGain system to transmit the AIS signal at both the HLU 388 List 2D and...

Page 10: ...d voltage to 100 V but applies positive voltage to the cable pairs which could accelerate corrosion on the cable pairs 6 04 The line voltage power supply used for both options is ground referenced but...

Page 11: ...L loop SNR margin for each HDSL loop relative to 10 7 BER operation Electrical Protection Secondary surge protection on DS1 and HDSL ports Power cross protection on HDSL ports Operating Temperature an...

Page 12: ...n Avenue Tustin CA 92780 ATTN Repair and Return Dept 714 832 9922 800 638 0031 11 TECHNICAL ASSISTANCE 11 01 PairGain Technical Assistance is available 24 hours a day 7 days a week by contacting PairG...

Page 13: ...ts sq ft 13 03 In Central Office locations the maximum power dissipation for open faced natural convection cooled mountings is limited to 120 Watts sq ft per Section 4 2 3 of the NEBS standard TR NWT...

Page 14: ...stem with sophisticated maintenance and troubleshooting tools Table 4 through Table 7 list the details of these SPLB functions A2LB and A5LB are patterned after the Teltrend addressable T1 repeater lo...

Page 15: ...k mode and selecting another loopback Only one loopback can exist at any given time Pressing both the Mode and SEL buttons again for three seconds terminates any active loopback ends the Manual Loopba...

Page 16: ...24 Revision 01 Page 16 Figure 6 HLU 388 List 2D Non Doubler Loopback Configurations The most important of the HiGain family of loopback options is the Smart Jack loopback which emulates the functions...

Page 17: ...rmal 4 Have the CO tester send the HLU 388 List 2D 4 in 7 in band loop up code for five seconds Observe that the HLU 388 List 2D displays the NLOC message which indicates that an HLU 388 List 2D loopb...

Page 18: ...in the returned pattern 20 errors if ILR 2 was sent followed by Normal looped data Note This error pattern will repeat every 20 seconds as long as the IOR loopback pattern is being sent This same 20 s...

Page 19: ...010 D5EA TIME OUT OVERRIDE Loopback Time out Override 1101 0101 1101 0110 D5D6 FAR END NI ACTIVATE Unblock AIS and pass 2 in 5 1100 0101 0101 0100 C554 IOR POWER DOWN HLU Removes HDSL line power 0110...

Page 20: ...rn 20 errors if ILR 2 was sent followed by Normal looped data Note This error pattern will repeat every 20 seconds as long as the IOR loopback pattern is being sent This same 20 second repeat scenario...

Page 21: ...10 D5EA TIME OUT OVERRIDE Loopback Time out Override 1101 0101 1101 0110 D5D6 FAR END NI ACTIVATE Unblock AIS and pass 2 in 5 1100 0101 0101 0100 C554 IOR POWER DOWN HLU Removes HDSL line power 0110 0...

Page 22: ...HiGain loopbacks see Figure 6 Note that all code sequences must be present for at least five seconds ABBREVIATIONS USED BELOW LU Loop Up LD Loop Down NI Network Interface CI Customer Interface ESF DL...

Page 23: ...execute all the HiGain system loopbacks see Figure 6 Note that all code sequences must be present for at least five seconds ABBREVIATIONS USED BELOW LU Loop Up LD Loop Down NI Network Interface CI Cu...

Page 24: ...me bits occur in the returned pattern 20 errors if ILR 2 was sent followed by Normal looped data Note This error pattern will repeat every 20 seconds as long as the IOR loopback pattern is being sent...

Page 25: ...rnate Query Loopback 1101 0101 1110 1010 D5EA TIME OUT OVERRIDE Loopback Time out Override 1101 0101 1101 0110 D5D6 IOR POWER DOWN HLU Removes HDSL line power 0110 0111 0110 0111 6767 Note The left mo...

Page 26: ...RAIS Remote Alarm Indicating Signal Indicates an AIS all 1 pattern is being transmitted from the remote T1 output port LAIS Local Alarm Indicating Signal Indicates an AIS all 1 pattern is being trans...

Page 27: ...see Figure 6 initiated from CO network by either the Intelligent Office Repeater IOR code the HLU 388 front panel Manual Loopback push buttons or the maintenance terminal CLOC Customer Local Loopback...

Page 28: ...e period Earlier and later data in four hour chunks on six different screens can be accessed by pressing P Previous or N Next respectively All of the counters can be set to zero by pressing C Clear fr...

Page 29: ...icate out of tolerance components or excessive temperature drift in critical components HDSL 24 Hours ES Errored Seconds The number of 1 second intervals which contained at least 1 HDSL CRC error This...

Page 30: ...n loop 1 SIG2 Signal 2 The HLU and HRU transceivers are trying to establish contact with each other on loop 2 ACQ1 Acquisition 1 The HLU and HRU multiplexers are trying to establish synchronization ov...

Page 31: ...MI B8ZS The line code that HLU 388 List 2D 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 AMI or B8ZS Displayed...

Page 32: ...Section 150 388 124 Revision 01 Page 32 Figure 7 HLU 388 List 2D Main Menu Figure 8 HLU 388 List 2D Non Doubler Status Display...

Page 33: ...Section 150 388 124 Revision 01 Page 33 Figure 9 HLU 388 List 2D Set Clock Menu Figure 10 HLU 388 List 2D System Settings Menu...

Page 34: ...Section 150 388 124 Revision 01 Page 34 Figure 11 HLU 388 List 2D Non Doubler Loopback Menu Figure 12 HLU 388 List 2D Non Doubler Performance Data Screen...

Page 35: ...Section 150 388 124 Revision 01 Page 35 Figure 13 HLU 388 List 2D Non Doubler 7 Day Performance History Screen Figure 14 HLU 388 List 2D Non Doubler Alarm History Screen...

Page 36: ...le Lists 1 2 3 3A 4 and 5 can not be used Lists 6 7 8 and greater can 4 The HRU 412 CPE current option must be set to 0 mA Its 60 mA CPE current switch must be set to 0 mA or its card edge pins must b...

Page 37: ...ween every other shelf in racks containing more than two shelves This technique deflects the rack heat outward and reduces thermo stress on the plugs 19 LOOPBACK OPERATION 19 01 The HiGain system has...

Page 38: ...etwork CDU1 and CDU2 are toward the customer All four loopbacks can be initiated by the 16 bit in band commands in SPLB states A1LB A2LB and A3LB as described in Tables 13 14 and 15 respectively NDU1...

Page 39: ...Loopback session and returns the display to normal mode Note that these same loopbacks can be initiated from the RS 232 maintenance port by choosing the Loopback Mode option D from the Main Menu This...

Page 40: ...388 124 Revision 01 Page 40 Figure 15 HLU 388 Doubler Loopback Configurations The most important of the HiGain family of loopback options is the Smart Jack loopback which emulates the functions of a s...

Page 41: ...ir or the HRU 412 If it fails the problem is in the CO equipment 6 The NREM and NLOC loopbacks can also be initiated from the front panel of the HLU 388 List 2D with the Mode and SEL push buttons see...

Page 42: ...rrors if ILR 1 was sent 200 errors if ILR 20 was sent and 20 errors if ILR 2 was sent followed by Normal looped data Note This error pattern will repeat every 20 seconds as long as the IOR loopback pa...

Page 43: ...01 1101 0101 D5D5 IR ALTERNATE QUERY LPBK Alternate Query Loopback 1101 0101 1110 1010 D5EA TIME OUT OVERRIDE Loopback Time out Override 1101 0101 1101 0110 D5D6 FAR END NI ACTIVATE Unblock AIS and pa...

Page 44: ...rrors if ILR 1 was sent 200 errors if ILR 20 was sent and 20 errors if ILR 2 was sent followed by Normal looped data Note This error pattern will repeat every 20 seconds as long as the IOR loopback pa...

Page 45: ...01 1101 0101 D5D5 IR ALTERNATE QUERY LPBK Alternate Query Loopback 1101 0101 1110 1010 D5EA TIME OUT OVERRIDE Loopback Time out Override 1101 0101 1101 0110 D5D6 FAR END NI ACTIVATE Unblock AIS and pa...

Page 46: ...IATIONS USED BELOW LU Loop Up LD Loop Down NI Network Interface CI Customer Interface ESF DL Extended Super Frame Data Link ADDRESSABLE 3 A3LB REPEATER LOOPBACK COMMANDS Position Name Code HLU 388 LU...

Page 47: ...st five seconds ABBREVIATIONS USED BELOW LU Loop Up LD Loop Down NI Network Interface CI Customer Interface ESF DL Extended Super Frame Data Link ADDRESSABLE 4 A4LB REPEATER LOOPBACK COMMANDS Position...

Page 48: ...was sent 200 errors if ILR 20 was sent and 20 errors if ILR 2 was sent followed by Normal looped data Note This error pattern will repeat every 20 seconds as long as the IOR loopback pattern is being...

Page 49: ...R QUERY LPBK Query Loopback 1101 0101 1101 0101 D5D5 IR ALTERNATE QUERY LPBK Alternate Query Loopback 1101 0101 1110 1010 D5EA TIME OUT OVERRIDE Loopback Time out Override 1101 0101 1101 0110 D5D6 IOR...

Page 50: ...nly NLOC NREM CLOC and CREM are available for non doubler applications 21 07 Figure 24 through Figure 27 show the Performance Data screens for doubler applications The Errored Seconds and Unavailable...

Page 51: ...dicates no alarms LLOS Local Loss of Signal No signal from HLU 388 List 2D local DSX 1 interface RLOS Remote Loss of Signal No signal from HRU 412 remote DS1 interface LOSW1 Loss of Sync Word 1 HDSL l...

Page 52: ...ack The loopback at doubler 2 toward network see Figure 15 initiated by either the IOR code the HLU 388 front panel Manual Loopback push buttons or the maintenance terminal CLOC Customer Local Loopbac...

Page 53: ...HDSL 24 Hours ES Errored Seconds The number of 1 second intervals which contained at least 1 HDSL CRC error This value is a running total of the last 24 hours HDSL 24 Hours UAS Unavailable Seconds The...

Page 54: ...Signal 1 The HLU and the first doubler transceivers are trying to establish contact with each other on loop 1 of span 1 SIG2 Signal 2 The HLU and the first doubler transceivers are trying to establish...

Page 55: ...Intelligent Repeater loop codes ACO Alarm CutOff A minor alarm occurred and was retired to an ACO condition after pressing the SEL button on the HLU front panel SELF TEST Self test The HLU is in a sel...

Page 56: ...larm LLOS Local Loss of Signal Indicates that no signal is detected at the DSX 1 input to the HLU Causes a minor alarm RLOS Remote Loss of Signal Indicates that no signal is detected at the DS1 input...

Page 57: ...Section 150 388 124 Revision 01 Page 57 Figure 16 HLU 388 List 2D Main Menu Figure 17 HLU 388 List 2D Status Display Span 1 1 or 2 Doublers...

Page 58: ...Section 150 388 124 Revision 01 Page 58 Figure 18 HLU 388 List 2D Status Display Span 2 1 Doubler Figure 19 HLU 388 List 2D Status Display Span 2 2 Doublers...

Page 59: ...Section 150 388 124 Revision 01 Page 59 Figure 20 HLU 388 List 2D Status Display Span 3 2 Doublers Figure 21 HLU 388 List 2D Set Clock Menu...

Page 60: ...Section 150 388 124 Revision 01 Page 60 Figure 22 HLU 388 List 2D System Settings Menu Figure 23 HLU 388 List 2D Doubler Loopback Menu...

Page 61: ...Section 150 388 124 Revision 01 Page 61 Figure 24 HLU 388 List 2D Performance Data Screen Span 1 1 or 2 Doublers Figure 25 HLU 388 List 2D Performance Data Screen Span 2 1 Doubler...

Page 62: ...Section 150 388 124 Revision 01 Page 62 Figure 26 HLU 388 List 2D Performance Data Screen Span 2 2 Doublers Figure 27 HLU 388 List 2D Performance Data Screen Span 3 2 Doublers...

Page 63: ...Section 150 388 124 Revision 01 Page 63 Figure 28 HLU 388 List 2D 7 Day Performance History Screen Span 1 1 or 2 Doublers Figure 29 HLU 388 List 2D 7 Day Performance History Screen Span 2 1 Doubler...

Page 64: ...Section 150 388 124 Revision 01 Page 64 Figure 30 HLU 388 List 2D 7 Day Performance History Screen Span 2 2 Doublers Figure 31 HLU 388 List 2D 7 Day Performance History Screen Span 3 2 Doublers...

Page 65: ...Section 150 388 124 Revision 01 Page 65 Figure 32 HLU 388 List 2D Alarm History Screen Span 1 1 or 2 Doublers Figure 33 HLU 388 List 2D Alarm History Screen Span 2 1 or 2 Doublers...

Page 66: ...sion 01 Page 66 Figure 34 HLU 388 List 2D Alarm History Screen Span 3 2 Doublers Copyright 1996 PairGain Technologies Inc PairGain is a registered trademark CopperOptics and HiGain are trademarks of P...

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