ADC H2TU-C-388 HiGain Instructions for use

HiGain
HiGain
TECHNICAL PRACTICE
HiGain
HDSL2
SETUP
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H2TU-C-388 List 3E Line Unit
Product: 150-2406-35
CLEI: VACJ1KDE

LTPH-TP-1001-02, Issue 2
ii February 28, 2001 H2TU-C-388 List 3E
Revision History of This Practice
To order copies of this document, use document catalog number LTPH-TP-1001-02.
Copyright
February 28, 2001
©Copyright 2001 ADC DSL Systems, Inc. All rights reserved.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc.
HiGain is a registered trademark of PairGain Technologies, Inc. No right, license, or interest to such trademarks is granted
hereunder, and you agree that no such right, license, or interest shall be asserted by you with respect to such trademark.
Other product names mentioned in this practice are used for identification purposes only and may be trademarks or registered
trademarks of their respective companies.
Disclaimer of Liability
Information contained in this document is company privateto ADC DSL Systems, Inc.,and shall not be modified, used, copied,
reproduced or disclosed in whole or in part without the written consent of ADC.
Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice.
In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits, and ADC further
disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of
liability applies to all products, publications and services during and after the warranty period.
Issue Release Date Revisions Made
1November 29, 2000 Initial release
2February 28, 2001 Software updates

LTPH-TP-1001-02, Issue 2 Using This Technical Practice
H2TU-C-388 List 3E February 28, 2001 iii
USING THIS TECHNICAL PRACTICE
The following conventions are used in this manual:
•Monospace type indicates screen text.
•Keys you press are indicated by small icons such as or . Key combinations to be pressed
simultaneously are indicated with a plus sign as follows: + .
•Items you select are in bold.
•Three types of messages, identified by icons, appear in text.
For a list of abbreviations used in this document, refer to “Appendix E - Abbreviations” on page 65.
INSPECTING SHIPMENT
Upon receipt of the equipment:
•Unpack each container and 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 ADC DSL Systems,
Inc. Order replacement equipment, if necessary.
•Check the packing list to ensure complete and accurate shipment of each listed item. If the shipment is short
or irregular, contact ADC DSL Systems, Inc. as described in “Returns” on page 63. If you must store the
equipment for a prolonged period, store the equipment in its original container.
Notes contain information about special circumstances.
Cautions indicate the possibility of personal injury or equipment damage.
The Electrostatic Discharge (ESD) symbol indicates that a device or assembly is susceptible to
damage from electrostatic discharge.
YENTER
CTRL ESC

Inspecting Shipment LTPH-TP-1001-02, Issue 2
iv February 28, 2001 H2TU-C-388 List 3E

LTPH-TP-1001-02, Issue 2 Table of Contents
H2TU-C-388 List 3E February 28, 2001 v
TABLE OF CONTENTS
Overview ____________________________________________________________________________ 1
Features..............................................................................................................................................1
Compatibility .....................................................................................................................................2
Applications .......................................................................................................................................2
Front Panel __________________________________________________________________________ 4
Installation___________________________________________________________________________ 9
Verification ......................................................................................................................................10
Verification without an H2TU-R Remote Unit.................................................................10
Verification with an H2TU-R Remote Unit ......................................................................10
Provisioning_________________________________________________________________________ 11
Using the MODE and SEL Buttons.................................................................................................11
Setting Options through MODE and SEL.........................................................................11
Resetting to Factory Defaults ............................................................................................12
Displaying System Parameter Settings..............................................................................12
Disabling an Alarm............................................................................................................12
Loopback Modes ...............................................................................................................12
Using a Maintenance Terminal........................................................................................................13
Connecting to a Maintenance Terminal.............................................................................13
The Logon Screen..............................................................................................................13
Provisioning Tasks...........................................................................................................................15
Setting Date and Time.......................................................................................................15
Setting Circuit ID Numbers...............................................................................................16
Configuring the System.....................................................................................................17
Clearing the History, Alarm, and Event Log Screens .......................................................29
Monitoring System Activity and Performance ____________________________________________ 30
Using the Monitor Screen to View System Activity........................................................................30
Using the Performance Screens to View Performance Data............................................................32
Performance History at the DS1 Interface.........................................................................32
Performance History at the HDSL2 Interface ...................................................................35
Current Statistics Screens for the DS1 Interface ...............................................................37
Current Statistics Screens for the HDSL2 Interface..........................................................38
Using the Performance Screens to View Alarm Data......................................................................39
Alarm History at the DS1 Interface...................................................................................39
Alarm History at the HDSL2 Interface..............................................................................41
Using the System Event Log to Track Events .................................................................................42
Using the Report Menu....................................................................................................................44

Table of Contents LTPH-TP-1001-02, Issue 2
vi February 28, 2001 H2TU-C-388 List 3E
Testing _____________________________________________________________________________ 46
System Alarms................................................................................................................................. 46
Alarm Option for Digital Loop Carrier (DLC) Feed ........................................................ 47
Retiring System Alarms.................................................................................................... 47
Remote LOS/AIS Response.............................................................................................. 48
OCT55 Test Pattern with AMI Line Code...................................................................................... 48
Loopback Operation........................................................................................................................ 49
Generic Loopback Commands.......................................................................................... 50
Special Loopback Commands........................................................................................... 50
SmartJack Loopback Commands...................................................................................... 51
Manual Loopback Session............................................................................................................... 51
Inband Loopback Session................................................................................................................ 52
General Troubleshooting Tips .......................................................................................... 52
GNLB Test Procedures..................................................................................................... 52
A2LB Test Procedures...................................................................................................... 53
A3LB and A4LB Test Procedures .................................................................................... 56
SmartJack Test Procedure................................................................................................. 56
Appendix A - Specifications____________________________________________________________ 57
Power Consumption ........................................................................................................................ 58
Maximum Power Dissipation.......................................................................................................... 58
Maximum Current Drain................................................................................................................. 58
Loop Attenuation............................................................................................................................. 59
H2TU-C-388 List 3E Card-Edge Connector................................................................................... 59
Network Management Control Bus .................................................................................. 59
Fuse Alarm........................................................................................................................ 60
Craft Port......................................................................................................................................... 60
Appendix B - Functional Operation _____________________________________________________ 61
Timing ............................................................................................................................................. 61
Ground Fault Detect........................................................................................................................ 61
Appendix C - Compatibility____________________________________________________________ 62
Appendix D - Product Support _________________________________________________________ 63
Technical Support............................................................................................................................ 63
Returns............................................................................................................................................. 63
Appendix E - Abbreviations____________________________________________________________ 65
Certification and Warranty______________________________________________ Inside Back Cover

LTPH-TP-1001-02, Issue 2 List of Figures
H2TU-C-388 List 3E February 28, 2001 vii
LIST OF FIGURES
1. HDSL2 System Model....................................................................................................................................3
2. H2TU-C-388 List 3E List 3E Front Panel......................................................................................................4
3. Installing the H2TU-C into a Shelf.................................................................................................................9
4. Logon Screen ................................................................................................................................................14
5. Config Menu - Date and Time......................................................................................................................15
6. Inventory Menu.............................................................................................................................................16
7. Config Menu.................................................................................................................................................17
8. Config Menu - Standard Options (Defaults Shown).....................................................................................18
9. Config Menu - ADC Options (Defaults Shown) ..........................................................................................18
10. Config Menu - Set to Factory Defaults.........................................................................................................28
11. Config Menu - Master Clear.........................................................................................................................29
12. Monitor Screen - Active Loopback with Alarms..........................................................................................30
13. H2TU-R DS1 31-Day Performance History.................................................................................................32
14. H2TU-C DS1 25-Hour Performance History ...............................................................................................33
15. H2TU-C DS1 48-Hour Performance History ...............................................................................................33
16. H2TU-C HDSL2 31-Day Performance History............................................................................................35
17. H2TU-C HDSL2 48-Hour Performance History..........................................................................................35
18. H2TU-C HDSL2 25-Hour Performance History..........................................................................................36
19. H2TU-R DS1 Current Statistics....................................................................................................................37
20. H2TU-C DS1 Current Statistics....................................................................................................................37
21. H2TU-C HDSL2 Current Statistics ..............................................................................................................38
22. H2TU-C DS1 Alarm History Screen............................................................................................................39
23. H2TU-R DS1 Alarm History Screen............................................................................................................40
24. H2TU-C HDSL2 Alarm History Screen.......................................................................................................41
25. System Event Log.........................................................................................................................................42
26. Report Menu - Full Report............................................................................................................................44
27. H2TU-R LOS/AIS Response Priorities ........................................................................................................48
28. Loopback Summary......................................................................................................................................49
29. Loopback Modes...........................................................................................................................................53
30. H2TU-C-388 Card-Edge Connector.............................................................................................................59
31. 210-to-DB-9 Adapter....................................................................................................................................60
32. H2TU-C-388 List 3E Block Diagram...........................................................................................................61

List of Tables LTPH-TP-1001-02, Issue 2
viii February 28, 2001 H2TU-C-388 List 3E
LIST OF TABLES
1. Front-Panel Description ................................................................................................................................. 5
2. Front-Panel Display Messages....................................................................................................................... 6
3. Navigational Keys for the HiGain Maintenance Terminal Screens............................................................. 13
4. Logon Screen Menus................................................................................................................................... 14
5. H2TU-C-388 List 3E Standard Config Menu Options ................................................................................ 19
6. H2TU-C-388 List 3E ADC Config Menu Options...................................................................................... 20
7. DS1 and DSX-1 24-hour PM Threshold...................................................................................................... 22
8. Response to H2TU-R DS1 Frame Conversion Options...............................................................................23
9. Extended SuperFrame Format...................................................................................................................... 24
10. SuperFrame Format...................................................................................................................................... 25
11. DDS NI and DS0 DP Latching Loopback Sequence................................................................................... 25
12. HiGain HDSL2 Loopback vs. Latching Sequence....................................................................................... 26
13. Response of H2TU-C and H2TU-R to LOS and AIS.................................................................................. 27
14. Monitor Screen Descriptions........................................................................................................................ 31
15. Error Acronyms Used on the DS1 Performance History Screens................................................................ 34
16. Error Acronyms Used on the HDSL2 Performance History Screens........................................................... 36
17. DS1 Alarm Descriptions .............................................................................................................................. 40
18. HDSL2 Alarm Descriptions......................................................................................................................... 41
19. Event Log Entry Messages List.................................................................................................................... 43
20. Report Types ................................................................................................................................................ 45
21. Front-Panel System Alarms Summary........................................................................................................ 46
22. Summary of HiGain HDSL2 Generic Loopback Codes and Activation Methods....................................... 50
23. Addressable Repeater Loopback Commands (A2LB)................................................................................. 54
24. Addressable Repeater Loopback Commands (A3LB and A4LB) ............................................................... 56
25. SmartJack Loopup and Loopdown Commands............................................................................................ 56
26. H2TU-C Power Parameters.......................................................................................................................... 58
27. HDSL2 Cable Attenuation Chart ................................................................................................................. 59

LTPH-TP-1001-02, Issue 2 Overview
H2TU-C-388 List 3E February 28, 2001 1
OVERVIEW
The H2TU-C-388 List 3E line unit is the Central Office (CO) side of a T1 transmission system. The HiGain
HDSL2 product family is fully compliant with the HDSL2 standard ANSI T1.418. Providing full-rate T1 access
using a single copper pair, HDSL2 is a cost-effective solution that offers an open architecture. The open
architecture inherent in HDSL2 guarantees interoperability, allowing simple and economic accommodation of
network growth.
HiGain HDSL2 products provide 1.552 Mbps transmission on one unconditioned copper pair over the full Carrier
Service Area (CSA) range. The CSA includes loops up to 12,000 feet of 24 AWG wire or 9,000 feet of 26 AWG
wire, including bridged taps.
FEATURES
Features specific to the List 3E family of HDSL2 modules include:
•Report menu option for downloading status and performance monitoring data to a file
•Enhanced loopback commands controlled by the SmartJack Loopback (LPBK) option as follows:
–100 inband loopdown command
–100000 (1-in-6) inband loopup command
•Sources sealing current when connected to an H2TU-R-402 List 5E or higher
Standard features include:
•HDSL2 transmission features
–Lightning and power cross protection on HDSL2 interfaces
–Full duplex HDSL2 transmission on one pair at 1.552 Mbps
–Ultra-low wander (Stratum 1 compliant)
–Grounded loop detection on High-bit-rate Digital Subscriber Line 2 (HDSL2)
•Front-panel provisioning features
–Four-character status display
–Status LED
–RS-232 craft port for connection to a maintenance terminal
–MODE and SEL pushbuttons
•HiGain HDSL2 maintenance screens for inventory, provisioning, and troubleshooting
–DS1 and HDSL2 performance monitoring
–Non-volatile alarm histories
–Performance Report Messaging (PRM) support for Supplemental PRM (SPRM) and Network PRM
(NPRM) at the H2TU-R
–Payload (PL) and HiGain (HG) loopback source identification
–Margin Alarm (MAL) threshold

Overview LTPH-TP-1001-02, Issue 2
2 February 28, 2001 H2TU-C-388 List 3E
•Configuration options
–Selectable DS1 pre-equalizer
–Bipolar Violation Transparency (BPVT) options
–Bit Error Rate (BER) alarm
–Loss of Signal/Alarm Indicator Signal (LOS/AIS) payload alarm option
–Remote provisioning
•Compatible with Double Dual Module Plus (DDM+) high-density shelves
•Digital Data Service (DDS) latching loopback
•Network Management and Administration (NMA) interface
COMPATIBILITY
The H2TU-C-388 List 3E is designed to mount in DDM+ high-density shelves. For a list of compatible shelves see
“Appendix C - Compatibility”on page 62.
APPLICATIONS
HiGain HDSL2 systems provide a cost-effective, easy-to-deploy method for delivering T1 High Capacity Digital
Service (HCDS) over a single copper pair. HiGain HDSL2 systems support a multitude of network connections
and system models (see Figure 1 on page 3).
•The service is deployed over one unconditioned, non-loaded copper pair.
•Conventional, inline DS1 repeaters are no longer required.
•Cable pair conditioning, pair separation and bridged tap removal are not required.
Each loop has no more than 35 dB of loss at 196 kHz, with driving and terminating impedances of 135 Ω. In
general, HiGain HDSL2 systems:
•Operate effectively inthe same cable binder group with otherHDSL2 lines, HDSL, T1, ADSL, SDSL, POTS,
Digital Data Service (DDS), and other transmission schemes.
•Can be used with customers requiring DS1 service on a temporary or permanent basis.
•Provide a means of quickly deploying service in advance of fiber-optic transmission systems.
DS1 is used throughout this document to refer to either the remote unit’s DS1 interface or the
line unit’s DSX-1 interface.

LTPH-TP-1001-02, Issue 2 Overview
H2TU-C-388 List 3E February 28, 2001 3
Figure 1. HDSL2 System Model
Network Connection HDSL2 System Model
Integrated
Access Device
NID/CPE
HDSL2
HDSL2
HDSL2
HDSL2
HDSL2
CSU/DSU
POTS
V.35
Wideband-3190
STS Shelf
"220" Office Repeater Bay
"200" Mechanics Shelf
200 Mechanics
OEM
DS3
DSX-1
STS-1
OC3
OC1
DS3
DSX-1
DSX-1
DSX-1
DSX-1
DS1
DS1
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MONITOR
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MAINT T1STATUS T1STATUS
SECONDARYT1 SECONDARYT1 VOICECHANNELS
FRAMING FRAMING
DSX-1
STS-1

Front Panel LTPH-TP-1001-02, Issue 2
4 February 28, 2001 H2TU-C-388 List 3E
FRONT PANEL
Figure 2 shows the H2TU-C-388 List 3E front panel. Table 1 on page 5 describesthe front-panelcomponents. For
a list of front-panel display messages, refer to Table 2 on page 6. For pinout diagrams of the H2TU-C card-edge
connector and craft port, refer to “Appendix A - Specifications”on page 57.
Figure 2. H2TU-C-388 List 3E List 3E Front Panel
Extraction handle
CLEI/ECI bar code label
HiGain
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SETUP

LTPH-TP-1001-02, Issue 2 Front Panel
H2TU-C-388 List 3E February 28, 2001 5
Table 1. 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
5 minutes. Using the MODE or SEL buttons reactivates the display and restarts the 5-minute timer.
Refer to Table 2 on page 6 for a listing of the four-character messages.
MODE and SEL pushbuttons Permits user options to be monitored and modified without the need of a maintenance terminal.
Used to initiate all HiGain loopbacks and to display DSX-1 line parameters and line unit identity.
Status LED The status LED can report the following conditions:
Off Line power is off.
Green Normal operation.
Red Fuse alarm.
Flashing red HDSL2 acquisition and system alarm.
Yellow An H2TU-C-388 List 3E Customer Remote Loopback (CREM) or a Network Local Loopback (NLOC)
is in effect.
Flashing yellow H2TU-C-388 List 3E is in an Armed (ARM) state.
Craft port (RS-232) Provides bidirectional communication between the unit and an external terminal to allow
configuration and performance monitoring through the maintenance terminal screens.
List number Identifies the list number of the H2TU-C.
CLEI and ECI bar code label Provides the human-readable Common Language Equipment Identifier (CLEI) code number and
the Equipment Catalog Item (ECI) bar code number.

Front Panel LTPH-TP-1001-02, Issue 2
6 February 28, 2001 H2TU-C-388 List 3E
Table 2 lists the front-panel display messages. The display reports the code of a pertinent alarm, loopback, or
diagnostic message and, in some cases, is followed by a second message that modifies the first message with a
value or current configuration setting.
Table 2. Front-Panel Display Messages
Message Full Name Description
ALARM MESSAGES
ACO Alarm Cutoff A system alarm has occurred and has been retired to an ACO
condition by pressing the SEL button on the H2TU-C front panel.
ALRM Alarm Condition Exists A system alarm condition is in effect.
DBER DS1 Bit Error Rate A system DS1 BER alarm is in effect and remains in effect until
cleared.
HBER HDSL2 Block Error Rate A system HDSL2 Block Error Rate alarm is in effect.
LA Loop Attenuation Indicates that the attenuation on the HDSL2 loop has exceeded the
maximum threshold value.
LAIS Line Alarm Indication Signal Indicates an AIS (all ones) pattern is being received or transmitted
at the H2TU-C DS1 input or output ports.
LLOS Local Loss of Signal Indicates that no signal is detected at the DSX-1 input to the
H2TU-C. Causes a system alarm.
LOSW Loss of Sync Word Indicates that the HDSL2 loop has lost synchronization.
MAL Margin Alarm The margin on HDSL2 loop has dropped below the threshold
(0 to 15 dB) as set by the operator.
PWR FEED GND Power Feed Ground The HDSL2 loop is grounded.
PWR FEED OPEN Power Feed Open Indicates a line power open condition.
PWR FEED SHRT Power Feed Short Indicates a short between the Tip and Ring of the HDSL2 pair.
PRMF Performance Report Messaging -
Far End H2TU-R PRM-FE BER threshold has been exceeded.
PRMN Performance Report Messaging -
Near End H2TU-R PRM-NE BER threshold has been exceeded.
RAIS Remote Alarm Indication Signal Indicates an AIS (all ones) pattern is being received or transmitted
at the H2TU-R DS1 input or output ports.
RLOS Remote Loss of Signal Indicates that no signal is detected at the DS1 input to the H2TU-R.
Causes a system alarm.
RRAI Remote RAI—Remote Alarm
Indication at the H2TU-R Net signal
has errors.)
Indicates an RAI alarm (yellow LED) from the CPE with errors from
the line unit or network.
SPNnSpan Number Accompanies the LOSW alarm and identifies the span where the
LOSW alarm occurred.
TRCI Transmit RAI-CI—Remote Alarm
Indication at the H2TU-R (Net signal
does not have errors.)
Upon reception of an RAI (yellow LED) from the CPE, the H2TU-R
sends RAI-CI towards the network if the network signal received at
the H2TU-R is clear. If the network signal is impaired (LOS, AIS, or
LOF), then the RAI is passed on to the network unaltered.
TUC Transmission Unit Central Office Accompanies the DBER, HBER, MAL, and LA alarm and indicates
that the alarm has occurred at the H2TU-C central office unit.
TUR Transmission Unit Remote End Accompanies the DBER, HBER, MAL, and LA alarm and indicates
that the alarm has occurred at the H2TU-R remote unit.

LTPH-TP-1001-02, Issue 2 Front Panel
H2TU-C-388 List 3E February 28, 2001 7
LOOPBACK MESSAGES
CLOC Customer Local Loopback Signal from customer is looped back to the customer at the
H2TU-R.
CREM Customer Remote Loopback Signal from customer is looped back to the customer at
H2TU-C-388.
NLOC Network Local Loopback DSX-1 signal is looped back to the network at the H2TU-C.
NREM Network Remote Loopback DSX-1 signal is looped back to the network at the H2TU-R.
SMJK Remote SmartJack Loopback DSX-1 signal is looped back to the network at the H2TU-R
SmartJack module.
DIAGNOSTIC MESSAGES
A = xx Maximum Loop Attenuation The Attenuation (A) message appears followed by xx, where xx is
the loop attenuation of the longest (maximum loss) span measured
in dB.
ACQ Acquisition The multiplexers of the H2TU-C and H2TU-R are trying to establish
synchronization over the HDSL2 loop of Span 1.
AnLAcquisition nLoop The multiplexers of the two devices on Span nare trying to establish
synchronization with each other, where nis the number of the span.
ARM HiGain System Armed Armed to respond to Intelligent Repeater Loop (ILR) codes.
BAD RT? No Response from H2TU-R The H2TU-C does not receive any response from the H2TU-R.
Therefore, the integrity of the H2TU-R or the HDSL2 loop is
questionable.
FERR Framing Bit Error Occurred Framing bit error occurred at H2TU-C DSX-1 input.
FLDL Flash Download Flash download of firmware upgrades. Contact Customer Service
for upgrade procedures (see “Appendix D - Product Support”on
page 63.)
HES HDSL2 CRC Error H2TU-C HDSL2 Loop Cyclical Redundancy Check (CRC) error.
LBPV Local Bipolar Violation A bipolar violation has been received at the DSX-1 input to the
H2TU-C-388.
M=xx HDSL2 Loop Margin Indicates the power of the received HDSL2 signal relative to noise
(S/N with respect to 21.5 dB). Any value of 6 dB or greater is
adequate for reliable system operation.
MNGD Managed The H2TU-C-388 is under control of the HMU-319 network
management unit. In this state, the front-panel craft port and
pushbuttons are disabled.
PWR FEED OFF Power Feed Off HDSL2 span power has been turned off by setting the PWFD option
to OFF, or HDSL2 span power has been turned off by use of the
A2LB Intelligent Office Repeater (IOR) powerdown code.
PWR FEED ON Power Feed On Indicates that the HDSL2 loop is not grounded or shorted.
SIG Signaling The transceivers of the H2TU-C and H2TU-R are trying to establish
contact with each other over the HDSL2 loop of Span 1.
SnLSynchronization nLoop The transceivers of the two devices on Span nare trying to establish
contact with each other, where nis the number of the span.
Continued
Table 2. Front-Panel Display Messages (Cont.)
Message Full Name Description

Front Panel LTPH-TP-1001-02, Issue 2
8 February 28, 2001 H2TU-C-388 List 3E
SYSTEM INFORMATION MESSAGES (a)
CODE xxxx Line Code: AMI, B8ZS The DS1 line code setting: Alternate Mark Inversion (AMI) or Bipolar
with 8-Zero Substitution (B8ZS).
FRM xxxx Frame: SF, ESF, UNFR Defines the type of frame pattern being received from the DSX-1:
SuperFrame (SF), Extended SuperFrame (ESF), or Unframed
(UNFR).
LATT xx Loop Attenuation The current loop attenuation threshold setting is measured in dB.
LIST xx H2TU-C List Number The list number xx.
MARG xx Margin The current margin threshold setting is measured in dB.
VER x.xx H2TU-C Software Version Number The software version number x.xx.
(a) System information messages are displayed in Scroll Mode. To scroll through the messages, press the MODE button for
3 or more seconds.
Table 2. Front-Panel Display Messages (Cont.)
Message Full Name Description

LTPH-TP-1001-02, Issue 2 Installation
H2TU-C-388 List 3E February 28, 2001 9
INSTALLATION
Figure 3. Installing the H2TU-C into a Shelf
1Raise the H2TU-C-388 front panel and slide the unit into the CO shelf card slot.
2Lower and push on the H2TU-C-388 front-panel to secure the unit in the shelf.
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 ADC.
When installing the H2TU-C, be sure to wear an antistatic wrist strap. Avoid touching
components on the circuit board.
To comply with the intrabuilding wiring requirements of GR-1089 CORE, Section 4.5.9, the
shields of the ABAM-type cables that connect the H2TU-C-388 DSX-1 output ports to the
cross-connect panel must be grounded at both ends.
CO Shelf
H2TU-C-388
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Installation LTPH-TP-1001-02, Issue 2
10 February 28, 2001 H2TU-C-388 List 3E
VERIFICATION
Once the H2TU-C-388 List 3E is installed, verify that it is operating properly. To do this, monitor the following:
•Status LED
•Status messages reported by the front-panel display (see Table 2 on page 6)
Verification without an H2TU-R Remote Unit
If there is no H2TU-R remote unit installed:
1Verify that the H2TU-C powers up. The front-panel display illuminates and reports status messages. (See
Table 2 on page 6 for a list of messages.)
2Verify that the H2TU-C attempts to communicate with a remote unit (status LED flashes red). Even if a
remote unit is not present, the following events should occur:
aThe front-panel display reports various four-character status messages.
bThe H2TU-C again attempts communication with a remote unit until a remote unit is detected.
Verification with an H2TU-R Remote Unit
If an H2TU-R remote unit has been installed:
1Verify that the H2TU-C powers up. (The front-panel display illuminates and reports various status messages.)
2Verify that the H2TU-C attempts to communicate with the remote unit (status LED flashes red). One of the
following occurs:
•If the remote unit is successfully identified and the HDSL2 loop synchronizes, the H2TU-C status LED
is steady green. The H2TU-C reports normal margin messages on the front-panel display.
•If the remote unit not identified, the H2TU-C reports four-character status messages. The H2TU-C
attempts communication again and reports four-character status messages. The H2TU-C repeats this
cycle until a remote unit is detected.
3Verify that a valid DS1 signal has been applied to the H2TU-C and the H2TU-R.
•If no DS1 signal is being applied to either the H2TU-C or the H2TU-R inputs, then the appropriate DS1
alarms (LLOS or RLOS) are observed on the front-panel display, and the status LED flashes red.
•If a valid DS1 signal is being supplied to the H2TU-C and H2TU-R, then DS1 alarm indications should
be absent and the status LED should be a steady green.

LTPH-TP-1001-02, Issue 2 Provisioning
H2TU-C-388 List 3E February 28, 2001 11
PROVISIONING
There are two provisioning methods:
•Use the MODE and SEL buttons on the front panel of the H2TU-C to:
–Set system options
–Reset the H2TU-C to its factory default settings for system options
–Display system option settings (scroll mode)
–Select system loopbacks
•Use a maintenance terminal (ASCII terminal or a PC running terminal emulation software) connected to the
H2TU-C craftport (or toan HMU craft port)to access the HiGainmaintenance screens (Figure 4 onpage 14).
This gives you full access to all H2TU-C status, history, inventory, and provisioning screens.
USING THE MODE AND SEL BUTTONS
Setting Options through MODE and SEL
To provision the H2TU-C-388 List 3E through the MODE and SEL buttons on the front panel:
1Press the MODE button for 1 second and then release it. The front panel display alternately shows the first
system parameter and its current setting.
2Press the SEL button to step through all possible settings of the selected parameter.
3After the desired setting has been selected, press the MODE button. This updates the current displayed
parameter to the selected setting, then advances to the next configurable parameter. After the last parameter
has been selected, a CONF NO message appears on the front-panel display.
4Do one of the following:
•To cancel the session without saving the requested parameter changes, press the MODE button or do
nothing. (After 30 seconds, the display returns to its normal mode without saving the new changes.)
•To accept the requested parameter changes, press the SEL button. (A CONF YES message displays, and
the display returns to its normal mode after saving the new changes.)
No dip switches or jumpers are required to provision the H2TU-C-388 List 3E as it contains a
non-volatile RAM (NVRAM) which stores the system option settings. System option settings are
retained if shelf power is lost or the H2TU-C-388 List 3E is unplugged.

Provisioning LTPH-TP-1001-02, Issue 2
12 February 28, 2001 H2TU-C-388 List 3E
Resetting to Factory Defaults
Alluser optionsfor theH2TU-C-388(Table 6on page 20) can be set to the factory default values using the MODE
and SEL buttons. To set the user options to their default values:
1Press the SEL button for 6 seconds until the following message appears:
DFLT NO
2Press the SEL button while the DFLT NO message is displayed.
The message changes to DFLT YES indicating the factory default values are now in effect and the display
returns to the normal mode.
To terminate the DFLT mode without setting the factory default values, do one of the following:
•Press the MODE button to return to the normal display mode.
•Wait 30 seconds for the unit to return to the normal display mode.
Displaying System Parameter Settings
To scroll throughthe current settings of all system parameters, press the MODE button for 3 or more seconds. The
H2TU-C displays the following parameters:
•Software version number
•List number
•Type of frame pattern received from the DSX-1
•Line code of the signal received from the DSX-1
•All user-configured parameter settings
•Loop attenuation threshold setting
•Margin alarm threshold setting
Disabling an Alarm
System alarms can be disabled by pressing the SEL button on the H2TU-C-388 front panel. This executes an
Alarm Cutoff (ACO) and returns the H2TU-C-388 to its non-alarm state. For more information, see “Retiring
System Alarms”on page 47.
Loopback Modes
See “Loopback Operation”on page 49 for instructionson using the MODE andSEL buttons to activate loopbacks.