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ADC H4TU-C-319 List 1 Line Unit, HDSL4 APPENDIX B - FUNCTIONAL OPERATION

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Appendix B - Functional Operation LTPH-UM-1031-03, Issue 3

64 September 12, 2003 H4TU-C-319 List 1

APPENDIX B - FUNCTIONAL OPERATION

HDSL4 technology provides full-duplex services at standard T1 rates over two pairs of copper wire between an

H4TU-C, H4Ds (if necessary), and an H4TU-R which comprise one ADC system. ADC systems use Overlapped

Pulse Amplitude Modulation Transmission (OPAM) transceiver systems to establish two, full-duplex, 784 kbps

data channels between the H4TU-C-319 and a remotely located H4TU-R.

A block diagram of the H4TU-C-319 is shown in Figure 34. The H4TU-C-319 receives a 1.544 Mbps DSX-1 data

stream from the DSX-1 digital cross-connect interface. The H4TU-C-319 contains a DS1 frame synchronizer

controlled by an 8-bit microprocessor that determines the type of framing on the DS1 stream and synchronizes

with it. The H4TU-C-319 recognizes Superframe (SF), including D4, or Extended Superframe (ESF) framing.

When the data is unframed, the H4TU-C-319 arbitrarily defines a frame bit.

Figure 34. H4TU-C-319 List 1 Block Diagram

TIMING

The low-loop wander (0.5 UI max) of an H4TU-C, when used with remote units, allows the circuit to be used in

all critical timing applications, including those used to transport Stratum 1 timing.

GROUND FAULT DETECTION

The H4TU-C has a Ground Fault Detection (GFD) circuit which detects a ground or a resistive path to ground on

any wire of the HDSL4 loop. This makes the product compliant with the Class A2 requirements of GR-1089.

SPECTRUM ISSUES

The asymmetric 776 kbps spectrum, defined in ANSI T1.418 Issue 2, allows the HDSL4 product to be spectrally

compatible with ADSL services in adjacent pairs in the same binding groups for all non-doubler applications. A

combination of asymmetric and symmetric spectrums is used for ADSL compatibility in doubler applications.

HDSL

XCVR

Microprocessor

GND5

Power

Supply

Pre-equalizer

Select

B

B

A

BAT8

7

H

10

Status

A

FrameGND J

RS-232

NetworkManagement

A

1

Ring

Tip

HDSL

XCVR 9

K

Tip

Ring

HDSL4-L

2

6

F

Tip

Ring

HDSL4-L1

RCV

SystemAlarm

B

2

Tip

Ring

LINE

LINE

XMT

BRG

BRG

MUX

DEMUX

T1

Framer

MODESEL(ACO)

-185Vdc or+/-123Vdc

PowerSupply

(GroundIsolated

andGroundFault Detect)

DSX-1

D

SX-1FuseAlarm

Contents

Main Page USING THIS MANUAL INSPECTING SHIPMENT Page TABLE OF CONTENTS Page LIST OF FIGURES LIST OF TABLES O F A LTPH-UM-1031-03, Issue 3 Front Panel H4TU-C-319 List 1 September 12, 2003 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 a Downstream Device Verification with a Downstream Device P USING THE MODE AND SEL PUSHBUTTONS Setting Options through MODE and SEL Resetting to Factory Default Displaying System Parameter Settings Disabling an Alarm Loopback Modes USING A MAINTENANCE TERMINAL Connecting to a Maintenance Terminal Logon Screen Figure 3. Logon Screen Table 4. Logon Screen Menus Table 4. Logon Screen Menus (Continued) PROVISIONING TASKS Setting Date and Time Setting Circuit ID Numbers Configuring the System Making Changes to Standard and ADC Options Provisioning LTPH-UM-1031-03, Issue 3 18 September 12, 2003 H4TU-C-319 List 1 Figure 7. Config Menu - Standard Options (defaults shown) Figure 8. Config Menu - ADC Options (defaults shown) Page Table 6. H4TU-C-319 List 1 ADC Config Menu Options Table 5. H4TU-C-319 List 1 Standard Config Menu Options (Continued) Page Page Resetting to Factory Defaults Clearing the History, Alarm, and Event Log Screens MONITORING SYSTEM ACTIVITY AND P SYSTEM OVERVIEW USING THE MONITOR SCREEN TO VIEW SYSTEM ACTIVITY Page Table 8. Monitor Screen Descriptions (Continued) USING THE PERFORMANCE SCREENS TO VIEW PERFORMANCE DATA Performance History at the DS1 Interface LTPH-UM-1031-03, Issue 3 Monitoring System Activity and Performance H4TU-C-319 List 1 September 12, 2003 29 Figure 14. H4TU-C DS1 25-Hour Performance History Figure 15. H4TU-C DS1 48-Hour Performance History Monitoring System Activity and Performance LTPH-UM-1031-03, Issue 3 30 September 12, 2003 H4TU-C-319 List 1 Figure 16. H4TU-R DS1 Current Statistics Figure 17. H4TU-C DS1 Current Statistics Table 9. Acronyms Used on the DS1 Performance History Screens Monitoring System Activity and Performance LTPH-UM-1031-03, Issue 3 32 September 12, 2003 H4TU-C-319 List 1 Performance History at the HDSL4 Interface Figure 18. H4TU-C HDSL (Loop 1/Loop 2) 31-Day Performance History Figure 19. H4TU-C HDSL (Loop 1/Loop 2) 48-Hour Performance History LTPH-UM-1031-03, Issue 3 Monitoring System Activity and Performance H4TU-C-319 List 1 September 12, 2003 33 Figure 21. H4TU-C HDSL (Loop 1/Loop 2) Current Statistics Table 10. Acronyms Used on the HDSL4 Performance History Screens USING THE PERFORMANCE SCREENS TO VIEW ALARM DATA Figure 23. H4TU-R DS1 Alarm History Screen Table 11. DS1 Alarm Descriptions Alarm History at the HDSL4 Interface Figure 24. H4TU-C HDSL Alarm History Screen Table 12. HDSL4 Alarm Descriptions USING THE EVENT LOG TO TRACK SYSTEM EVENTS Table 13. Event Log Entry Messages List USING THE REPORT MENU Table 14. Report Types T SYSTEM ALARMS Table 15. Front-Panel System Alarms (Continued) Page Remote LOS and AIS Response Figure 27. H4TU-R LOS and AIS Response Priorities OCT55 TEST PATTERN WITH AMI LINE CODE LOOPBACK OPERATION Generic Loopback Commands Special Loopback Commands Manual Loopback Session Setting the Loopback Time-Out Option (LBTO) Activating Manual Loopback Mode LOOPBACK TEST PROCEDURES General Troubleshooting Tips Figure 29. Loopback Modes DSX-1 LoopbacksToward Customer CI-Customer Interface LoopbacksToward Network GNLB Test Procedures A3LB Test Procedure A5LB Test Procedure Page Page TESTING WITH H4TU-C BERT GENERATOR TESTING WITH H4TU-R BERT GENERATOR APPENDIX A - SPECIFICATIONS Page P OWER C MAXIMUM POWER DISSIPATION MAXIMUM CURRENT DRAIN LOOP ATTENUATION, INSERTION LOSS, AND REACH H4TU-C-319 CARD-EDGE CONNECTOR Network Management Control Bus Fuse Alarm System Alarm Output Pin CRAFT PORT Appendix B - Functional Operation LTPH-UM-1031-03, Issue 3 64 September 12, 2003 H4TU-C-319 List 1 APPENDIX B - FUNCTIONAL OPERATION SX-1 RCV K NetworkManagement APPENDIX C - COMPATIBILITY APPENDIX D - PRODUCT SUPPORT APPENDIX E - ABBREVIATIONS Page Page CERTIFICATION AND WARRANTY FCC CLASS A COMPLIANCE LIMITED WARRANTY M SAFETY STANDARDS COMPLIANCE