ADC HiGain H2TU-C-319 List 4E User manual

HiGain
HiGain
USER MANUAL
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H2TU-C-319 List 4E
Product Catalog: H2TU-C-L4E
CLEI Code: VACHYVYG

LTPH-UM-1049-02, Issue 2
ii January 9, 2002 H2TU-C-319 List 4E
Revision History of This Manual
Copyright
January 9, 2002
© 2002ADC DSLSystems, Inc.All rights reserved.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc. HiGain is a registered trademark of ADC DSL Systems, 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 private to 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
1October 5, 2001 Initial release.
2January 9, 2002 BERT update.

LTPH-UM-1049-02, Issue 2 Using This Manual
H2TU-C-319 List 4E January 9, 2002 iii
USING THIS MANUAL
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 76.
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 75. 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-UM-1049-02, Issue 2
iv January 9, 2002 H2TU-C-319 List 4E

LTPH-UM-1049-02, Issue 2 Table of Contents
H2TU-C-319 List 4E January 9, 2002 v
TABLE OF CONTENTS
Overview ____________________________________________________________________________ 1
Features..............................................................................................................................................1
Compatibility .....................................................................................................................................2
Applications .......................................................................................................................................2
Front Panel __________________________________________________________________________ 3
Installation___________________________________________________________________________ 8
Verification ........................................................................................................................................9
Verification without an H2TU-R Remote Unit...................................................................9
Verification with an H2TU-R Remote Unit ........................................................................9
Provisioning_________________________________________________________________________ 10
Using the MODE and LBK Pushbuttons.........................................................................................10
Setting Options through MODE and LBK ........................................................................10
Resetting to Factory Default Values..................................................................................11
Displaying System Parameter Settings..............................................................................11
Disabling an Alarm............................................................................................................11
Loopback Modes ...............................................................................................................11
Using a Maintenance Terminal........................................................................................................12
Connecting to a Maintenance Terminal.............................................................................12
The Logon Screen..............................................................................................................12
Provisioning Tasks...........................................................................................................................14
Setting Date and Time.......................................................................................................14
Setting Circuit ID Numbers...............................................................................................15
Configuring the System.....................................................................................................16
Clearing the History, Alarm, and Event Log Screens .......................................................33
Monitoring System Activity and Performance ____________________________________________ 34
Using the Monitor Screen to View System Activity........................................................................35
Using the Performance Screens to View Performance Data............................................................37
Performance History at the DS1 Interface.........................................................................38
Performance History at the HDSL2 Interface ...................................................................40
Current Statistics Screens for the DS1 Interface ...............................................................42
Current Statistics for HDSL2 Interface .............................................................................43
Using the Performance Screens to View Alarm Data......................................................................44
Alarm History at the DS1 Interface...................................................................................44
Alarm History at the HDSL2 Interface..............................................................................46
Using the System Event Log to Track Events .................................................................................48
Using the Report Menu....................................................................................................................50

Table of Contents LTPH-UM-1049-02, Issue 2
vi January 9, 2002 H2TU-C-319 List 4E
Testing _____________________________________________________________________________ 52
System Alarms................................................................................................................................. 52
Alarm Option for the Digital Loop Carrier Feed.............................................................. 53
Retiring System Alarms.................................................................................................... 53
Remote LOS and AIS Response....................................................................................... 54
OCT55 Test Pattern with AMI Line Code...................................................................................... 54
Loopback Operation........................................................................................................................ 55
Generic Loopback Commands.......................................................................................... 56
Special Loopback Commands........................................................................................... 56
SmartJack Loopback Commands...................................................................................... 57
Manual Loopback Session............................................................................................................... 57
Activating Manual Metallic Test Access ........................................................................................ 58
in-band Loopback Sessions............................................................................................................. 59
General Troubleshooting Tips .......................................................................................... 59
GNLB Test Procedures..................................................................................................... 59
A2LB Test Procedures...................................................................................................... 61
A3LB and A4LB Test Procedures .................................................................................... 64
SmartJack Test Procedure................................................................................................. 64
Appendix A - Specifications____________________________________________________________ 65
Power Consumption ........................................................................................................................ 66
Maximum Power Dissipation.......................................................................................................... 66
Maximum Current Drain................................................................................................................. 66
Loop Attenuation, Insertion Loss, and Reach................................................................................. 67
H2TU-C-319 List 4E Card-Edge Connector................................................................................... 68
Network Management Control Bus .................................................................................. 69
Fuse Alarm........................................................................................................................ 69
System Alarm Output Pin................................................................................................. 70
Craft Port......................................................................................................................................... 71
Appendix B - Functional Operation _____________________________________________________ 72
Timing ............................................................................................................................................. 73
Ground Fault Detect........................................................................................................................ 73
Appendix C - Compatibility____________________________________________________________ 74
Appendix D - Product Support _________________________________________________________ 75
Technical Support............................................................................................................................ 75
Returns............................................................................................................................................. 75
Appendix E - Abbreviations____________________________________________________________ 76
Certification and Warranty _____________________________________________ Inside Back Cover

LTPH-UM-1049-02, Issue 2 List of Figures
H2TU-C-319 List 4E January 9, 2002 vii
LIST OF FIGURES
1. H2TU-C-319 List 4E Front Panel ...................................................................................................................3
2. Installing the H2TU-C-319 List 4E into a Shelf .............................................................................................8
3. Logon Screen.................................................................................................................................................13
4. Config Menu - Date and Time.......................................................................................................................14
5. Inventory Screen............................................................................................................................................15
6. Config Menu..................................................................................................................................................16
7. Config Menu - Standard Options (defaults shown).......................................................................................17
8. Config Menu - ADC Options (defaults shown) ............................................................................................17
9. Metallic Test Access Block Diagram............................................................................................................28
10. MTA Relays ..................................................................................................................................................29
11. Metallic Test Access TB6 on HMS-358 Backplane......................................................................................29
12. H2TU-C-319 List 4E Block Diagram ...........................................................................................................30
13. Config Menu - Reset to Factory Defaults......................................................................................................32
14. Config Menu - Master Clear..........................................................................................................................33
15. Monitor Screen - Active Loopback with Alarms..........................................................................................35
16. H2TU-R DS1 31-Day Performance History .................................................................................................38
17. H2TU-R DS1 25-Hour Performance History................................................................................................38
18. H2TU-C DS1 48-Hour Performance History................................................................................................39
19. H2TU-C HDSL2 31-Day Performance History............................................................................................40
20. H2TU-C HDSL2 48-Hour Performance History ..........................................................................................40
21. H2TU-C HDSL2 25-Hour Performance History ..........................................................................................41
22. H2TU-R DS1 Current Statistics....................................................................................................................42
23. H2TU-C DS1 Current Statistics....................................................................................................................42
24. H2TU-C HDSL2 Current Statistics...............................................................................................................43
25. H2TU-C DS1 Alarm History Screen.............................................................................................................44
26. H2TU-R DS1 Alarm History Screen.............................................................................................................45
27. H2TU-C HDSL2 Alarm History Screen .......................................................................................................46
28. System Event Log..........................................................................................................................................48
29. Report Menu - Full Report............................................................................................................................50
30. H2TU-R LOS and AIS Response Priorities..................................................................................................54
31. Loopback Summary.......................................................................................................................................55
32. Loopback Modes ...........................................................................................................................................60
33. H2TU-C-319 List 4E Card-Edge Connector.................................................................................................68
34. HMS-358 Backplane H2TU-C-319 List 4E Card Edge Connector Labeling...............................................69
35. RS-232 Craft Port Pinouts.............................................................................................................................71
36. H2TU-C-319 List 4E Block Diagram ...........................................................................................................72

List of Tables LTPH-UM-1049-02, Issue 2
viii January 9, 2002 H2TU-C-319 List 4E
LIST OF TABLES
1. Front-Panel Description.................................................................................................................................. 4
2. Front-Panel Display Messages........................................................................................................................ 5
3. Navigational Keys for the HiGain HDSL2 Maintenance Terminal Screens ................................................ 12
4. Logon Screen Menus..................................................................................................................................... 13
5. H2TU-C-319 List 4E Standard Config Menu Options................................................................................. 18
6. H2TU-C-319 List 4E ADC Config Menu Options....................................................................................... 19
7. DS1 and DSX-1 24-hour PM Threshold....................................................................................................... 22
8. Response to H2TU-R DS1 Frame Conversion Options................................................................................ 24
9. Extended SuperFrame Format....................................................................................................................... 25
10. SuperFrame Format....................................................................................................................................... 25
11. DDS NI and DS0 DP Latching Loopback Sequence.................................................................................... 26
12. HiGain HDSL2 Loopback vs. Latching Sequence ....................................................................................... 26
13. Response of H2TU-C-319 List 4E and H2TU-R to LOS and AIS............................................................... 27
14. Monitor Screen Descriptions......................................................................................................................... 36
15. Error Acronyms Used on the DS1 Performance History Screens................................................................. 39
16. Error Acronyms Used on the HDSL2 Performance History Screens........................................................... 41
17. DS1 Alarm Descriptions............................................................................................................................... 45
18. HDSL2 Alarm Descriptions.......................................................................................................................... 47
19. Event Log Entry Messages List.................................................................................................................... 49
20. Report Types................................................................................................................................................. 51
21. Front-Panel System Alarms Summary.......................................................................................................... 52
22. Summary of HiGain HDSL2 Generic Loopback Codes and Activation Methods ....................................... 56
23. Addressable Repeater Loopback Commands (A2LB).................................................................................. 61
24. Addressable Repeater Loopback Commands (A3LB and A4LB)................................................................ 64
25. SmartJack Loopup and Loopdown Commands ............................................................................................ 64
26. H2TU-C-319 List 4E Power Parameters....................................................................................................... 66
27. HDSL2 Reach Chart ..................................................................................................................................... 67

LTPH-UM-1049-02, Issue 2 Overview
H2TU-C-319 List 4E January 9, 2002 1
OVERVIEW
The H2TU-C-319 List 4E (H2TU-C) 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 4E 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 in-band loopdown command
–100000 (1-in-6) in-band loopup command
•Connection of the HDSL2 span to Loop 2 on pins K and 9 rather than on Loop 1, pins F and 6
•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
–DS1 splitting and bridge access
–Status Light Emitting Diodes (LEDs)
–RS-232 craft port for connection to a maintenance terminal
–MODE and LBK pushbuttons
•Maintenance screens for inventory, provisioning, and troubleshooting
–DS1 and HDSL2 performance monitoring
–Non-volatile performance monitoring
–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-UM-1049-02, Issue 2
2 January 9, 2002 H2TU-C-319 List 4E
•Configuration options
–Selectable DS1 pre-equalizer
–Bipolar Violation Transparency (BPVT) options
–Bit Error Rate (BER) alarm
–PowerBack OffNetwork(PBON)and PowerBackOffCustomer(PBOC)optionsfor configuringoutput
levels
–Loss of Signal/Alarm Indication Signal (LOS/AIS) payload alarm option
–Remote provisioning
•Compatible with HMS-358 Soneplex®Wideband 3190 shelves only
•Digital Data Service (DDS) latching loopback
•Network Management and Administration (NMA) interface
•Metallic Test Access (MTA)
•Dual DSX-1 port option
COMPATIBILITY
The H2TU-C has two unique features, Metallic Test Access and Dual DS1 port options, which are not provided
in standard ADCline units with 3192 mechanics. These featuresrequire additional access pinswhich are provided
by a special card-edge connector, shown in Figure 33 on page 68. Only the HMS-358 set of shelves can
accommodate this special connector.
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.
•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 135Ω. In
general, HiGain HDSL2 systems:
•Operate effectively inthe same cable binder group with otherHDSL2 lines, HDSL, T1, ADSL, SDSL, POTS,
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-UM-1049-02, Issue 2 Front Panel
H2TU-C-319 List 4E January 9, 2002 3
FRONT PANEL
Figure 1 shows the H2TU-C-319 List 4E front panel. Table 1 on page 4 describes the front-panel components. For
pinout diagrams of the H2TU-C-319 List 4E card-edge connector and craft port, refer to “Appendix A -
Specifications”on page 65.
Figure 1. H2TU-C-319 List 4E Front Panel
System option pushbuttons
Front-panel display
Craft port
DSX-1 access jacks
Card handle
(CLEI code and
ECI bar code label on
outside of handle)
Status LED
List number
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Front Panel LTPH-UM-1049-02, Issue 2
4 January 9, 2002 H2TU-C-319 List 4E
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 LBK pushbuttons reactivates the display and restarts the 5-minute
timer. Refer to Table 2 on page 5 for a listing of the four-character messages.
MODE and LBK system
option pushbuttons Permits user options to be monitored and modified without the need of a maintenance terminal. Used to initiate all HiGain loopbacks and test states as well as 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.
Flashing green HDSL2 acquisition.
Red Fuse alarm.
Flashing red System alarm.
Yellow An H2TU-C Customer Remote Loopback (CREM) or a Network Local Loopback (NLOC) is in effect.
Flashing yellow H2TU-C is in an Armed state.
DSX-1 access jacks
BRG Provides non-intrusive bridging jack access to (IN) and from (OUT) the HDSL2 span at the
MUX DSX-1 interface. Allows the two DS1 payloads to be monitored.
LINE Provides splitting jack access to (IN) and from (OUT) the HDSL2 span at the MUX DSX-1 interface.
Breaks the IN and OUT paths to permit test signal insertion and retrieval.
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.
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.
List number Identifies the list number of the H2TU-C.

LTPH-UM-1049-02, Issue 2 Front Panel
H2TU-C-319 List 4E January 9, 2002 5
Table 2 lists the front-panel display messages. The four-character display reports the code of an alarm, loopback,
or diagnostic message and, in some cases, is followed by a second four-character 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 Cut Off A system alarm has occurred, and has been retired to an ACO
condition by pressing the LBK pushbutton 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 Local 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.
MTA Metallic Test Access Indicates the H2TU-C is in a metallic test access state.
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.
SPN1Span Number Accompanies the LOSW alarm and identifies the span where the
LOSW alarm occurred.
TRCI Transmit RAI-CI—TX RAI-CI
Indication - Customer Installation 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 toward the network if the network signal received at the
H2TU-R is clear. If the network signal is impaired (LOS, AIS, or Loss
of Frame [LOF]), then the RAI is automatically passed on to the
network.
TUC Transmission Unit Central Office Accompanies the HBER, MAL, and LA alarm and indicates that the
alarm has occurred at the H2TU-R remote unit.
TUR Transmission Unit Remote End Accompanies the HBER, MAL, and LA alarm and indicates that the
alarm has occurred at the H2TU-R remote unit.
Continued

Front Panel LTPH-UM-1049-02, Issue 2
6 January 9, 2002 H2TU-C-319 List 4E
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.
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 (or the H2TU-C and
first regenerator) are trying to establish synchronization over the
HDSL2 loop of Span 1.
ARM HiGain System Armed Armed to respond to Intelligent Repeater Loop (ILR) codes.
BAD RT? No Response from H2TU-R The H2TU-C receives no response from the H2TU-R and all HDSL2
loop conditions are normal. 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 75).
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.
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 is under control of the HMU-319Network 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) Power Down 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 (or the H2TU-C and
first regenerator) are trying to establish contact with each other over
the HDSL2 loop of Span 1.
Continued
Table 2. Front-Panel Display Messages (Continued)
Message Full Name Description

LTPH-UM-1049-02, Issue 2 Front Panel
H2TU-C-319 List 4E January 9, 2002 7
SYSTEM INFORMATION MESSAGES (a)
CODE xxxx Line Code: AMI or B8ZS The DS1 line code setting: Alternate Mark Inversion (AMI) or Bipolar
with 8-Zero Substitution (B8ZS).
FRM xxxx Frame: SF, ESF, or 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 measured in decibels.
LIST xx H2TU-C List Number The list number of the H2TU-C.
MARG xx Margin The current margin threshold setting measured in decibels.
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 pushbutton for
3 or more seconds.
Table 2. Front-Panel Display Messages (Continued)
Message Full Name Description

Installation LTPH-UM-1049-02, Issue 2
8 January 9, 2002 H2TU-C-319 List 4E
INSTALLATION
Figure 2. Installing the H2TU-C-319 List 4E into a Shelf
1Align the H2TU-C with the enclosure slot guides, then push the unit in until it touches the backplane
card-edge connector.
2Place your thumbs on the H2TU-C front panel and push the H2TU-C firmly into the slot guides until the unit
clicks into the backplane and is properly seated.
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 an H2TU-C in a chassis, 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 DSX-1 output ports to the
cross-connect panel must be grounded at both ends.
H2TU-C-319
CO shelf

LTPH-UM-1049-02, Issue 2 Installation
H2TU-C-319 List 4E January 9, 2002 9
VERIFICATION
Once the H2TU-C is installed, verify that it is operating properly. To do this, monitor the following:
•Status LED
•Status messages reported by the front-panel display (Table 2 on page 5 lists the status messages).
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 5 lists the 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
lights a steady green. The H2TU-C reports normal margin messages on the front-panel display.
•If the remote unit is 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) display on the front panel 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.

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PROVISIONING
There are two provisioning methods:
•Use the MODE and LBK pushbuttons 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
–Select MTA test mode
•Use a maintenance terminal, such as an ASCII terminal or a PC running terminal emulation software,
connected to the H2TU-C craft port or an HMU craft port to access the maintenance screens. Figure 3 on
page 13shows the maintenance screen. This providesfull access to all H2TU-C status, history,inventory, and
provisioning screens.
USING THE MODE AND LBK PUSHBUTTONS
Setting Options through MODE and LBK
To provision the H2TU-C through the MODE and LBK pushbuttons on the front panel:
1Press the MODE pushbutton for 1 second and then release it. The front panel display alternately shows the
first system parameter and its current setting.
2Press the LBK pushbutton to step through all possible settings of the selected parameter.
3After the desired setting has been selected, press the MODE pushbutton. 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 pushbutton 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 LBK pushbutton. 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 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 if the H2TU-C is unplugged.

LTPH-UM-1049-02, Issue 2 Provisioning
H2TU-C-319 List 4E January 9, 2002 11
Resetting to Factory Default Values
All user options for the H2TU-C, described in Table 5 on page 18, can be set to the factory default values using
the MODE and LBK pushbuttons. To set the user options to their default values:
1Press the LBK pushbutton for 6 seconds until the following message appears:
DFLT NO
2Press the LBK pushbutton until 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 pushbutton 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 through the current settings of all system parameters, press the MODE pushbutton for 3 or more seconds.
The H2TU-C displays the following parameters:
•H2TU-C software version number
•H2TU-C 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 LBK pushbutton on the H2TU-C front panel. This executes an
ACO and returns the H2TU-C to its non-alarm state. For more information, see “Retiring System Alarms”on
page 53.
Loopback Modes
See “Loopback Operation”on page 55 for instructions on using the MODE and LBK pushbuttons to activate
loopbacks.

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USING AMAINTENANCE TERMINAL
Connecting to a Maintenance Terminal
The craft port on the front panel allows you to connect the H2TU-C to a maintenance terminal (ASCII terminal
or PC running a terminal emulation program). Once connected to a maintenance terminal, you can access the
maintenance, provisioning, and performance screens.
To connect to a maintenance terminal:
1Connect a standard 9-pin terminal cable to the RS-232 craft port, as shown in Figure 1 on page 3, on the
front panel.
2Connect the other end of the cable to the serial port on the maintenance terminal.
3Start a terminal emulation program such as Procomm that emulates a VT100 terminal.
4Configure the maintenance terminal to the following communication settings:
•9600 baud
•No parity
•8 data bits
•1 stop bit
•Hardware flow control to OFF
5If necessary, press + to refresh the HiGain HDSL2 logon screen.
The Logon Screen
The HiGain HDSL2 maintenance terminal screens allow you to monitor, provision, and troubleshoot an H2TU-C
system.
To select a menu from the HiGain HDSL2 logon screen, shown in Figure 3 on page 13, do one of the following:
•Press the underlined letter of the menu.
•Use the arrow keys to select the menu and press .
Table 3 summarizes the navigational keys. They are also listed in the onscreen Help menu. Table 4 on page 13
describes the Logon screen menus.
Table 3. Navigational Keys for the HiGain HDSL2 Maintenance Terminal Screens
Key (a)
(a) Legacy management units require the use of control keys instead of arrow keys.
Function
Cycle through selections.
Activate the current setting or choice, or display a menu.
Return to the parent menu.
or + Select the submenu or item above the current one, or return to the previous menu.
or + Select the submenu or item below the current one.
or + Select the menu or item to the right of the current one.
or + Select the menu or item to the left of the current one, or return to the previous menu.
+ Refresh the screen.
CTRL R
← → ENTER
SPACEBAR
ENTER
ESC
↑CTRL E
↓CTRL X
→CTRL D
←CTRL S
CTRL R