PairGain HiGain SOLITAIRE H2TU-C-319 List 1 Instructions for use

SOLITAIRE
I G AIN
Technical Practice
HiGain Solitaire Line Unit
H2TU-C-319 List 1
Part Number: 150-2400-01
CLEI Code: VACHDN0C
H2TU-C-319 List 1C
Part Number: 150-2400-13
CLEI Code: VACHKNZC
™152-319-100-02•¨
Section 152-319-100-02

152-319-100-02, Revision 02
ii April 21, 2000 H2TU-C-319 List 1 and List 1C
Revision History of This Practice
©Copyright 2000 PairGain Technologies, Inc.
PairGain and HiGain are registered trademarks and HiGain Solitaire, The Power Behind DSL Access, the HiGain Solitaire logo,
and the PairGain logo design are trademarks of PairGain Technologies, Inc. No right, license, or interest to such trademarks is
granted hereunder, and you agree that you shall assert no such right, license, or interest with respect to such trademarks. All other
product names mentioned in this document are used for identification purposes only and may be trademarks or registered
trademarks of their respective companies.
Information contained in this document is company privateto PairGainTechnologies, Inc.,and shall not bemodified, used, copied,
reproduced or disclosed in whole or in part without the written consent of PairGain.
Information furnished by PairGain Technologies is believed to be accurate and reliable. However, no responsibility is assumed by
PairGain Technologies for its use; nor for any infringement of patents or other rights of third parties which may result from its use.
No license is granted by implication or otherwise under any patent or patent rights of PairGain Technologies. PairGain
Technologies reserves the right to change specifications at any time without notice.
Revision Release Date Revisions Made
01 November 3, 1999 Initial release.
02 April 21, 2000 New firmware.

152-319-100-02, Revision 02 Using This Technical Practice
H2TU-C-319 List 1 and List 1C April 21, 2000 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 boldface font.
•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 59.
DOCUMENTATION
If you have comments on this PairGain document, send an email to [email protected]. Type
the product name and the section number of the document in the subject area of the email message.
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 PairGain. 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 PairGain as described in the Warranty located inside the back cover. 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 equipment damage or personal injury.
The Electrostatic Discharge (ESD) susceptibility symbol indicates that a device or assembly is
susceptible to damage from electrostatic discharge.
YENTER
CTRL ESC

Inspecting Shipment 152-319-100-02, Revision 02
iv April 21, 2000 H2TU-C-319 List 1 and List 1C

152-319-100-02, Revision 02 Table of Contents
H2TU-C-319 List 1and 1C April 21, 2000 v
TABLE OF CONTENTS
Overview ____________________________________________________________________________ 1
Features..............................................................................................................................................1
Compatibility .....................................................................................................................................2
Applications .......................................................................................................................................2
HiGain Solitaire Regenerators...........................................................................................................3
Front Panel __________________________________________________________________________ 4
Installation___________________________________________________________________________ 8
Verification ........................................................................................................................................9
Verification without a Downstream Device........................................................................9
Verification with a Downstream Device .............................................................................9
Provisioning Requirements..............................................................................................................10
Provisioning_________________________________________________________________________ 11
Using the MODE and SEL Buttons (List 1 Only)...........................................................................11
Setting Options through MODE and SEL.........................................................................11
Resetting to Factory Default Values..................................................................................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
Making Changes to the System Configuration..................................................................17
Clearing the History, Alarm and Event Log Screens ........................................................23
Monitoring System Activity and Performance ____________________________________________ 24
System Overview.............................................................................................................................24
Using the Monitor Screen to View System Activity........................................................................25
Using the Performance Screens to View Performance Data............................................................26
Performance History at the DS1 Interface.........................................................................27
Performance History at the HDSL2 Interface ...................................................................29
Current Statistics Screens for the DS1 Interface ...............................................................30
Current Statistics for HDSL2 Interface .............................................................................31
Using the Performance Screens to View Alarm Data......................................................................32
Alarm History at the DS1 Interface...................................................................................32

Table of Contents 152-319-100-02, Revision 02
vi April 21, 2000 H2TU-C-319 List 1and 1C
Alarm History at the HDSL2 Interface............................................................................. 34
Using the Event Log to Track System Events................................................................................. 35
Troubleshooting _____________________________________________________________________ 37
Front-panel System Alarms............................................................................................................. 37
Alarm Option for DLC Feed............................................................................................. 38
Retiring System Alarms.................................................................................................... 38
Remote LOS and AIS Response....................................................................................... 39
OCT55 Test Pattern with AMI Line Code...................................................................................... 39
Loopback Operation........................................................................................................................ 40
Generic Loopback Commands.......................................................................................... 40
Special Loopback Commands........................................................................................... 42
Manual Loopback Session ................................................................................................ 43
Loopback Test Procedures .............................................................................................................. 44
General Troubleshooting Tips .......................................................................................... 44
GNLB Test Procedures..................................................................................................... 44
A1LB, A2LB, and A5LB Test Procedures....................................................................... 46
A3LB and A4LB Test Procedures .................................................................................... 49
Appendix A - Specifications____________________________________________________________ 50
Power Consumption ........................................................................................................................ 51
Maximum Power Dissipation.......................................................................................................... 51
Maximum Current Drain................................................................................................................. 51
H2TU-C-319 Card Connector......................................................................................................... 52
Network Management Control Bus .................................................................................. 52
Fuse Alarm........................................................................................................................ 52
System Alarm Output Pin................................................................................................. 53
Craft Port......................................................................................................................................... 53
Appendix B - Functional Operation _____________________________________________________ 54
Timing ............................................................................................................................................. 54
Ground Fault Detect........................................................................................................................ 54
Appendix C - Compatibility____________________________________________________________ 55
Appendix D - Product Support _________________________________________________________ 56
Technical Support............................................................................................................................ 56
World Wide Web............................................................................................................................. 56
Returns............................................................................................................................................. 56
Appendix E - Abbreviations____________________________________________________________ 59
Certification and Warranty______________________________________________ Inside Back Cover

152-319-100-02, Revision 02 List of Figures
H2TU-C-319 List 1and 1C April 21, 2000 vii
LIST OF FIGURES
1. HDSL2 System Model ....................................................................................................................................3
2. H2TU-C-319 List 1 Front Panel......................................................................................................................4
3. Installing the H2TU-C-319 into a Shelf..........................................................................................................8
4. Logon Screen.................................................................................................................................................14
5. Configuration Menu - Date and Time...........................................................................................................15
6. Inventory Screen............................................................................................................................................16
7. Configuration Menu ......................................................................................................................................17
8. Configuration Menu - Standard Options (Defaults Shown)..........................................................................18
9. Configuration Menu - PairGain Options (Defaults Shown)..........................................................................18
10. Configuration Menu - Reset to Factory Defaults ..........................................................................................22
11. Master Clear ..................................................................................................................................................23
12. System Spans.................................................................................................................................................24
13. Monitor Screen - Active Loopback with Alarms ..........................................................................................25
14. H2TU-R DS1 31-day Performance History..................................................................................................27
15. H2TU-C DS1 25-hour Performance History.................................................................................................27
16. H2TU-C HDSL2 31-day Performance History.............................................................................................29
17. H2TU-R DS1 Current Statistics....................................................................................................................30
18. H2TU-C DS1 Current Statistics....................................................................................................................30
19. H2TU-C HDSL2 Current Statistics...............................................................................................................31
20. H2TU-C DS1 Alarm History Screen.............................................................................................................32
21. H2TU-R DS1 Alarm History Screen.............................................................................................................33
22. H2TU-C HDSL2 Alarm History Screen.......................................................................................................34
23. System Event Log..........................................................................................................................................35
24. H2TU-R LOS and AIS Response Priorities..................................................................................................39
25. Loopback Summary.......................................................................................................................................40
26. Loopback Modes...........................................................................................................................................45
27. H2TU-C-319 Card-edge Connector..............................................................................................................52
28. RS-232 Craft Port Pinouts.............................................................................................................................53
29. H2TU-C-319 Block Diagram........................................................................................................................54

List of Tables 152-319-100-02, Revision 02
viii April 21, 2000 H2TU-C-319 List 1and 1C
LIST OF TABLES
1. Front-panel Description.................................................................................................................................. 5
2. Front-panel Display Messages (List 1 Only).................................................................................................. 6
3. Navigational Keys for the HiGain Solitaire Maintenance Terminal Screens............................................... 13
4. Logon Screen Menus .................................................................................................................................... 14
5. H2TU-C-319 List 1 and List 1C Standard Config Screen Options.............................................................. 19
6. H2TU-C-319 List 1 and List 1C PairGain Config Screen Options.............................................................. 20
7. DS1/DSX-1 24-hour PM Threshold ............................................................................................................. 22
8. Monitor Screen Descriptions ........................................................................................................................ 26
9. Acronyms Used on the DS1 Performance History Screens.......................................................................... 28
10. Acronyms Used on the HDSL2 Performance History Screens .................................................................... 29
11. DS1 Alarm Descriptions............................................................................................................................... 33
12. HDSL2 Alarm Descriptions.......................................................................................................................... 34
13. Event Log Entry Messages List.................................................................................................................... 36
14. Front-panel System Alarms .......................................................................................................................... 37
15. Summary of HiGain Solitaire Loopback Codes and Activation Methods.................................................... 41
16. Addressable Repeater Loopback Commands (A2LB).................................................................................. 46
17. Addressable Repeater Loopback Commands (A3LB and A4LB)................................................................ 49
18. H2TU-C Power Parameters—No Regenerator............................................................................................. 51

152-319-100-02, Revision 02 Overview
H2TU-C-319 List 1 and List 1C April 21, 2000 1
OVERVIEW
The HiGain Solitaire™product family from PairGain®is the industry’s first practical implementation of High
bit-rate Digital Subscriber Line 2 (HDSL2). PairGain products are fully compliant with the HDSL2 standard.
Providing full-rateT1 access using just 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, economic
accommodation of network growth. HiGain Solitaire uses the industry’s first HDSL2 chipset (ANSI T1/E1.4
compliant) developed by PairGain.
HiGain Solitaire 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 American Wire Gauge
(AWG) wire or 9,000 feet of 26 AWG wire, including bridged taps.
FEATURES
The H2TU-C-319 line unit is the Central Office (CO) side of a T1 transmission system. List 1 and List 1C are
identical, except that the List 1C does not provide the standard front-panel provisioning features (RS-232
connector, MOD andSEL buttons,and four-character display). List 1Cprovisioning is accomplished only through
the HMU-319 management unit interface.
•HDSL2 transmission features
–Three-span range with two regenerators (36 kft, 24 AWG)
–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 (List 1 only)
–DS1 splitting and bridging access
–Status LED
–RS-232 craft port for connection to a maintenance terminal (List 1 only)
•HiGain Solitaire HDSL2 maintenance screens for inventory, provisioning, and troubleshooting
–High-performance, non-volatile DS1 and HDSL2 performance monitoring
–Non-volatile alarm histories
•Configuration options
–Selectable DS1 pre-equalizer
–Bipolar Violation Transparency (BPVT)
–Bit Error Rate (BER) alarm
–Loss of Signal/Alarm Indication Signal (LOS/AIS) payload alarm
–Remote provisioning
–Selectable loopback activation codes
•Compatible with 3192 mechanics shelves
•Payload (PL) and HiGain (HG) loopback source identification

Overview 152-319-100-02, Revision 02
2 April 21, 2000 H2TU-C-319 List 1 and List 1C
•Network Management and Administration (NMA) interface
•Margin threshold alarm
COMPATIBILITY
The H2TU-C-319 is designed to mount in 3192 mechanics shelves. For a list of compatible shelves see
“Appendix C - Compatibility”on page 55.
APPLICATIONS
HiGain Solitaire systems provide a cost-effective, easy-to-deploy method for deliveringT1 High Capacity Digital
Service (HCDS) over a single copper pair. HiGain Solitaire 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, T1 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
 . In
general, HiGain Solitaire systems:
•Operate effectively inthe same cable binder group withother HDSL2 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.

152-319-100-02, Revision 02 Overview
H2TU-C-319 List 1 and List 1C April 21, 2000 3
Figure 1. HDSL2 System Model
HIGAIN SOLITAIRE REGENERATORS
For applications without regenerators (doublers), the H2TU-C-319 is directly connected to an H2TU-R remote
unit by one HDSL2 cable pair. The H2TU-C-319 List 1 and List 1C are compatible with all HiGain Solitaire
H2TU-Rs.
For regenerator applications, one to two regenerators may be used in the HDSL2 loop between the H2TU-C and
H2TU-R.
•The H2TU-C-319 List 1 and List 1C can power one regenerator (H2RU-407 or H2RU-409) and a remote unit
(H2TU-R-402) for a total of two spans.
•If the H2TU-R is locally powered, the H2TU-C can power up to two regenerators for a total of three spans.
Future enhancements of the H2TU-C-319 List 1 and List 1C will support regenerators.

Front Panel 152-319-100-02, Revision 02
4 April 21, 2000 H2TU-C-319 List 1 and List 1C
FRONT PANEL
Figure 2 shows the H2TU-C-319 List 1 front panel. Table 1 on page 5 describes the front-panel components. 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 50.
Figure 2. H2TU-C-319 List 1 Front Panel
The H2TU-C-319 List 1C does not feature a front-panel display, craft port or MODE and SEL
buttons. To provision the List 1C, use the management unit interface.

152-319-100-02, Revision 02 Front Panel
H2TU-C-319 List 1 and List 1C April 21, 2000 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 system option
buttons 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 or system alarm.
Yellow An H2TU-C-319 Customer Remote Loopback (CREM) or a Network Local Loopback (NLOC) is in
effect.
Flashing yellow H2TU-C-319 is in an Armed (ARM) state.
DSX-1 access jacks
BRG Provides non-intrusive bridging jack access to (IN) and from (OUT) the HDSL2 span at the 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 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.
List number Identifies the list number of the H2TU-C-319.
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.
Configuration Number For some products the configuration number may contain either a standalone two or three-digit
configuration number or a five or six-digit warranty configuration number as follows:
Digit 1 - Last digit of shipment year
Digits 2 and 3 - Shipment month
Digits 4, 5, and 6 - Configuration number
The configuration number identifies the version of the product. New configuration numbers usually
accompany changes in the last two characters of the CLEI code.
The configuration number is found on a small label attached to the unit. It is the last two numbers
(following the x) of a 13-character part number. For example: 150-1234-01-x01.

Front Panel 152-319-100-02, Revision 02
6 April 21, 2000 H2TU-C-319 List 1 and List 1C
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 (List 1 Only)
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 Local Alarm Indication Signal Indicates an AIS (all ones) pattern is being transmitted from the
local DS1 output port.
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.
LRAI Line RAI Indicates an RAI alarm (yellow) from the CPE with an error-free
signal from the line unit or network.
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 Ground The HDSL2 loop is grounded.
PWR FEED OPEN Open Indicates a line power open condition.
PWR FEED SHRT 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 at far end.
PRMN Performance Report Messaging - Near
End H2TU-R PRM-NE BER threshold has been exceeded at near end.
RAIS Remote Alarm Indication Signal Indicates an AIS (all ones) pattern is being received at the H2TU-R
DS1 input port.
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 Indicates an RAI alarm (yellow) from the CPE with errors from the
line unit or network.
SPN(n) Span Number Accompanies the LOSW alarm and identifies the span where the
LOSW alarm occurred.
TUC Transmission Unit Central Office Accompanies the 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 HBER, MAL, and LA alarm and indicates that the
alarm has occurred at the H2TU-R remote unit.
LOOPBACK MESSAGES
CRGnCustomer Regenerator nLoopback Signal from customer is looped back to the customer at H2RUn,
where nis the number of the regenerator.
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 the H2TU-C.
NRGnNetwork Regenerator nLoopback DSX-1signal is looped back to the network at H2RUn, where nis the
number of the regenerator.
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.

152-319-100-02, Revision 02 Front Panel
H2TU-C-319 List 1 and List 1C April 21, 2000 7
LOOPBACK MESSAGES continued
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.
AnLAcquisition nLoop The multiplexers of the two devices on Span nare trying to establish
synchronization with each other, where nis the span number.
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 updates. Contact Customer Service for
update procedures (see “Appendix D - Product Support” on page 56).
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-319.
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-319 is under control of the HMU-319 Network
management unit. In this state, the front-panel craft port and push
buttons are disabled.
PWR FEED OFF Power Feed Off HDSL2 span power has been turned off by setting the PWRF option
to off, or HDSL2 span power has been turned off by use of the A1LB,
A2LB, and A5LB 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.
SnLSignal nLoop The transceivers of the two devices on Span nare trying to establish
contact with each other, where nis the span number.
SYSTEM INFORMATION MESSAGES (a)
CODE xxxx Line Code: AUTO, AMI or B8ZS The line code that the H2TU-C is receiving at its DSX-1 interface, if
the DS1 option is set to AUTO. Otherwise, it mimics either of the
other two DS1 line code settings: 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), Unframed (UNFR).
LATT xx Loop Attenuation The current loop attenuation threshold setting measured in dB.
LIST xx H2TU-C-319 List Number The list number of the H2TU-C-319.
MARG xx Margin The current margin threshold setting measured in dB.
VER x.xx H2TU-C-319 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 (List 1 Only) (Cont.)
Message Full Name Description

Installation 152-319-100-02, Revision 02
8 April 21, 2000 H2TU-C-319 List 1 and List 1C
INSTALLATION
Figure 3. Installing the H2TU-C-319 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 front panel and push the H2TU-C into the slot guides until 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 PairGain Technologies.
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.

152-319-100-02, Revision 02 Installation
H2TU-C-319 List 1 and List 1C April 21, 2000 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 (see Table 2 on page 6)
Verification without a Downstream Device
If there is no downstream device 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 downstream devices (status LED flashes red). Even
if a downstream device 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 downstream devices until a downstream device is
detected.
Verification with a Downstream Device
If a downstream device 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 downstream devices (status LED flashes red). One of
the following occurs:
•If downstream devicesare successfully identified and the HDSL2 loop synchronizes, the H2TU-C status
LED will be a steady green. The H2TU-C reports normal margin messages on the front-panel display.
•If downstream devices are not successfully 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 downstream device is detected.
3If there is more than one span, verify that each subsequent span synchronizes normally by monitoring the
front-panel display messages.
4If a remote unit is installed, verify that the last span synchronizes normally. The H2TU-C status LED should
be a steady green, and the front-panel display should report normal margin messages.
5Verify 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.

Installation 152-319-100-02, Revision 02
10 April 21, 2000 H2TU-C-319 List 1 and List 1C
PROVISIONING REQUIREMENTS
Refer to “Provisioning”on page 11 for instructions on configuring and monitoring the H2TU-C-319.
•The H2TU-C-319 List 1 can be provisioned by using the MODE and SEL buttons on the front panel or by
accessing the HiGain Solitaire HDSL2 maintenance screens. While the MODE and SEL buttons can be used
to manually accomplish some provisioning tasks, such as setting system options, the HiGain Solitaire HDSL2
maintenance screens (available when you connect a PC to the craft port) can handle all provisioning tasks.
•The H2TU-C-319 List 1Ccan only be provisioned through a maintenance terminal connected to the craft port
of a HiGain Management Unit (HMU), which can then access the HiGain Solitaire HDSL2 maintenance
screens.
After a successful installation, complete the following tasks:
1Set the date and time (see “Setting Date and Time”on page 15).
2Set the circuit ID numbers (see “Setting Circuit ID Numbers”on page 16).
3Make any desired changes to configuration (see “Making Changesto the System Configuration”on page 17).
4Clear the Performance and Alarm history screens and the Event Log to ensure accurate data (see “Clearing
the History, Alarm and Event Log Screens”on page 23).

152-319-100-02, Revision 02 Provisioning
H2TU-C-319 List 1 and List 1C April 21, 2000 11
PROVISIONING
There are two provisioning methods:
•Use the MODE and SEL buttons on the front panel of the H2TU-C-319 (List 1 only) 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 (VT100 terminal or a PC running terminal emulation software) connected to the
H2TU-C craft port (or to an HMU craft port) to access the HiGain Solitaire HDSL2 maintenance screens
(Figure 4 on page 14). This gives you full access to all H2TU-C status, history, inventory, and provisioning
screens.
USING THE MODE AND SEL BUTTONS (LIST 1 ONLY)
Setting Options through MODE and SEL
To provision the H2TU-C-319 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 appears, 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-319 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-319 is unplugged.

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12 April 21, 2000 H2TU-C-319 List 1 and List 1C
Resetting to Factory Default Values
All user options for the H2TU-C-319 List 1 (Table 5 on page 19) 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-319 List 1 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
If the system is in a Minor alarm state, the alarm relay can be disengaged by pressing the SEL button. This
activates the Alarm CutOff (ACO) indication. For more information about alarms, see “Front-panel System
Alarms”on page 37.
Loopback Modes
See “Loopback Operation”on page 40 for instructions on using the MODE and SEL buttons to activate loopbacks.