ADC H2TU-C-319 List 4E LOOPBACK OPERATION

LTPH-UM-1049-02, Issue 2 Testing

H2TU-C-319 List 4E January 9, 2002 55

LOOPBACK OPERATION

HiGain HDSL2 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

HDSL2 channels to the H2TU-C, the H2TU-C DSX-1 interface and the DS1 channels to the customer. Loopback

options include:

•Generic Loopback (GNLB) commands, including the SmartJack (SMJK) option (see Table22 on page 56)

•Special Loopback (SPLB) commands (see “Special Loopback Commands” on page56) and the following

command tables:

–Addressable Repeater Loopback commands: A2LB (see Table21 on pa g e52)

–Addressable Repeater Loopback commands: A3LB, A4LB (see Table24 on page 64)

Loopback commands can be initiated by:

•Selecting the loopback type using the MODE and LBK pushbuttons on the H2TU-C front panel or the manual

loopback (LBK) pushbutton on the H2TU- R.

•Selecting the loopback type from the Monitor menu when connected to the craft port of the H2TU-C or

H2TU-R

•Entering the loopback code into the test equipment connected to the H2TU-C or H2TU-R.

Figure 31. Loopback Summary

HiGain supports multiple loopbacks, but a single loopback is the preferred method.

Network Customer

Premises

Activate loopback using

one of the following:

• Maintenance terminal

•Test set

• MODE/SEL pushbuttons

Activate loopback using

one of the following:

•Test set

• Loopback pushbutton

• Maintenance terminal

H2TU-C H2TU-R

NLOC NREM

SMJK

TLOS

CREM CLOC

Contents

Main HiGain HDSL2 U SER M L B K M O D E Revision History of This Manual USING THIS MANUAL I NSPECTING S Page TABLE OF CONTENTS Page LIST OF FIGURES LIST OF TABLES O F C A LTPH-UM-1049-02, Issue 2 Front Panel H2TU-C-319 List 4E January 9, 2002 3 FRONT PANEL DCE Status LED DSX-1 access jacks Craft port Table 1. Front-Panel Description Page Page Table 2. Front-Panel Display Messages (Continued) I V Verification without an H2TU-R Remote Unit Verification with an H2TU-R Remote Unit P USING THE MODE AND LBK PUSHBUTTONS Setting Options through MODE and LBK Resetting to Factory Default Values Displaying System Parameter Settings Disabling an Alarm Loopback Modes USING A MAINTENANCE TERMINAL Connecting to a Maintenance Terminal The Logon Screen Figure 3. Logon Screen Table 4. Logon Screen Menus PROVISIONING TASKS Setting Date and Time Setting Circuit ID Numbers Configuring the System Making Changes to Standard and ADC Options LTPH-UM-1049-02, Issue 2 Provisioning H2TU-C-319 List 4E January 9, 2002 17 Figure 7. Config Menu - Standard Options (defaults shown) Figure 8. Config Menu - ADC Options (defaul ts shown) Page Table 6. H2TU-C-319 List 4E ADC Config Menu Options Table 5. H2TU-C-319 List 4E Standard Config Menu Options (Continued) Page Table 6. H2TU-C-319 List 4E ADC Config Menu Options (Contin ued) Page Page Page Table 9. Extended SuperFrame Format Table 10. SuperFrame Format Page Page Provisioning LTPH-UM-1049-02, Issue 2 28 January 9, 2002 H2TU-C-319 List 4E Test Access Figure 9. Metallic Test Access Block Diagram LTPH-UM-1049-02, Issue 2 Provisioning H2TU-C-319 List 4E January 9, 2002 29 MUX Figure 10. MTA Relays DACS Provisioning LTPH-UM-1049-02, Issue 2 30 January 9, 2002 H2TU-C-319 List 4E Figure 12. H2TU-C-319 List 4E Block Diagram Dual DSX-1 Port Option Resetting to Factory Defaults Clearing the History, Alarm, and Event Log Screens MONITORING SYSTEM ACTIVITY AND P USING THE MONITOR SCREEN TO VIEW SYSTEM ACTIVITY Table 14. Monitor Screen Descriptions USING THE PERFORMANCE SCREENS TO VIEW PERFORMANCE DATA 38 January 9, 2002 H2TU-C-319 List 4E Performance History at the DS1 Interface Figure 16. H2TU-R DS1 31-Day Performance History Figure 17. H2TU-R DS1 25-Hour Performance History Page 40 January 9, 2002 H2TU-C-319 List 4E Performance History at the HDSL2 Interface Figure 19. H2TU-C HDSL2 31-Day Performance History Figure 20. H2TU-C HDSL2 48-Hour Performance History Page 42 January 9, 2002 H2TU-C-319 List 4E Current Statistics Screens for the DS1 Interface Figure 22. H2TU-R DS1 Current Statistics Figure 23. H2TU-C DS1 Current Statistics LTPH-UM-1049-02, Issue 2 Monitoring System Activity and Performance H2TU-C-319 List 4E January 9, 2002 43 Current Statistics for HDSL2 Interface Figure 24. H2TU-C HDSL2 Current Statistics USING THE PERFORMANCE SCREENS TO VIEW ALARM DATA Figure 26. H2TU-R DS1 Alarm History Screen Table 17. DS1 Alarm Descriptions 46 January 9, 2002 H2TU-C-319 List 4E Alarm History at the HDSL2 Interface Figure27 shows the H2TU-C HDSL2 alarm history and Table 18 describes the alarms. Figure 27. H2TU-C HDSL2 Alarm History Screen Table 17. DS1 Alarm Descriptions (Continued) Screen Alarm Front-Panel Alarm Description Table 18. HDSL2 Alarm Descriptions USING THE SYSTEM EVENT LOG TO TRACK EVENTS Table 19. Event Log Entry Messages List USING THE REPORT MENU Table 20. Report Types T SYSTEM ALARMS Alarm Option for the Digital Loop Carrier Feed Retiring System Alarms Remote LOS and AIS Response Figure 30. H2TU-R LOS and AIS Response Priorities OCT55 TEST PATTERN WITH AMI LINE CODE LOOPBACK OPERATION Generic Loopback Commands Special Loopback Commands SmartJack Loopback Commands M ANUAL L OOPBACK S Setting the Loopback Time-Out Option Activating Manual Loopback Mode ACTIVATING MANUAL METALLIC TEST ACCESS IN-BAND LOOPBACK SESSIONS General Troubleshooting Tips GNLB Test Procedures Testing LTPH-UM-1049-02, Issue 2 60 January 9, 2002 H2TU-C-319 List 4E Figure 32. Loopback Modes DSX-1 GNLB loopback codes. LoopbacksToward Customer CI-Customer Interface A2LB Test Procedures Page Page A3LB and A4LB Test Procedures SmartJack Test Procedure APPENDIX A - SPECIFICATIONS P OWER C M AXIMUM P OWER D M AXIMUM C URRENT D LOOP ATTENUATION, INSERTION LOSS, AND REACH Appendix A - Specifications LTPH-UM-1049-02, Issue 2 68 January 9, 2002 H2TU-C-319 List 4E H2TU-C-319 LIST 4E CARD-EDGE CONNECTOR Figure 33. H2TU-C-319 List 4E Card-Edge Connector Network Management Control Bus Fuse Alarm System Alarm Output Pin CRAFT PORT Terminal Figure 35. RS-232 Craft Port Pinouts H2TU-C-319 Terminal APPENDIX B - FUNCTIONAL OPERATION Figure 36. H2TU-C-319 List 4E Block Diagram Page APPENDIX C - COMPATIBILITY APPENDIX D - PRODUCT SUPPORT TECHNICAL SUPPORT R APPENDIX E - ABBREVIATIONS Page Page CERTIFICATION AND WARRANTY FCC CLASS A COMPLIANCE L IMITED W M S AFETY S TANDARDS C ,-Q6o