ADC H2TU-C-388 HiGain User manual

HiGain
HiGain
USER MANUAL
MODE SEL
SETUP
STATUS
RS
DCE
232
L
HiGain
HDSL2
H
2
T
U
•
3
8
8
1E
H2TU-C-388 List 1E Line Unit
Product Catalog: 150-2406-15
CLEI: VACH4WYC

152-388-115-03, Issue 03
ii April 21, 2000 H2TU-C-388 List 1E
Revision History of This Manual
Copyright
April 21, 2000
© 2000 ADC DSL Systems, 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.
Revision Release Date Revisions Made
01 December 2, 1999 Initial release
02 April 21, 2000 Updated log and loopback modes screens and added SPN, TUC, and TUR.
03 January 24, 2002 ADC rebranding; removed regenerator information

152-388-115-03, Issue 03 Using This Manual
H2TU-C-388 List 1E April 21, 2000 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 indicated in bold.
•Three types of messages, identified by icons, appear in text.
For a list of abbreviations used in this document, refer to “List of Abbreviations” on page 64.
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 “Appendix D - Product Support” 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 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 152-388-115-03, Issue 03
iv April 21, 2000 H2TU-C-388 List 1E

152-388-115-03, Issue 03 Table of Contents
H2TU-C-388 List 1E April 21, 2000 v
TABLE OF CONTENTS
Overview ____________________________________________________________________________ 1
Features..............................................................................................................................................1
Compatibility .....................................................................................................................................2
Applications .......................................................................................................................................2
Front Panel __________________________________________________________________________ 4
Installation___________________________________________________________________________ 8
Verification ........................................................................................................................................9
Verification without an H2TU-R Remote Unit...................................................................9
Verification with an H2TU-R Remote Unit ........................................................................9
Provisioning Requirements..............................................................................................................10
Provisioning_________________________________________________________________________ 11
Using the MODE and SEL Buttons.................................................................................................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 .......................................................28
Monitoring System Activity and Performance ____________________________________________ 29
Using the Monitor Screen to View System Activity........................................................................30
Using the Performance Screens to View Performance Data............................................................32
Performance History at the DS1 Interface.........................................................................33
Performance History at the HDSL2 Interface ...................................................................35
Current Statistics Screens for the DS1 Interface ...............................................................36
Current Statistics for HDSL2 Interface .............................................................................37
Using the Performance Screens to View Alarm Data......................................................................37
Alarm History at the DS1 Interface...................................................................................38
Alarm History at the HDSL2 Interface..............................................................................40
Using the Event Log to Track System Events .................................................................................41

Table of Contents 152-388-115-03, Issue 03
vi April 21, 2000 H2TU-C-388 List 1E
Testing _____________________________________________________________________________ 43
Front-Panel System Alarms............................................................................................................. 43
Alarm Option for the Digital Loop Carrier Feed.............................................................. 44
Retiring System Alarms.................................................................................................... 44
Remote LOS/AIS Response.............................................................................................. 45
OCT55 Test Pattern with AMI Line Code...................................................................................... 45
Loopback Operation........................................................................................................................ 46
Generic Loopback Commands.......................................................................................... 46
Special Loopback Commands........................................................................................... 48
Manual Loopback Session ................................................................................................ 49
Loopback Test Procedures .............................................................................................................. 50
General Troubleshooting Tips .......................................................................................... 50
GNLB Test Procedures..................................................................................................... 50
A2LB Test Procedures...................................................................................................... 52
A3LB and A4LB Test Procedures .................................................................................... 55
Appendix A - Specifications____________________________________________________________ 56
Power Consumption ........................................................................................................................ 57
Maximum Power Dissipation.......................................................................................................... 57
Maximum Current Drain................................................................................................................. 57
H2TU-C-388 Card-Edge Connector................................................................................................ 58
Network Management Control Bus .................................................................................. 58
Fuse Alarm........................................................................................................................ 58
Craft Port......................................................................................................................................... 59
Appendix B - Functional Operation _____________________________________________________ 60
Appendix C - Compatibility____________________________________________________________ 62
Appendix D - Product Support _________________________________________________________ 63
List of Abbreviations _________________________________________________________________ 65
Certification and Warranty______________________________________________ Inside Back Cover

152-388-115-03, Issue 03 List of Figures
H2TU-C-388 List 1E April 21, 2000 vii
LIST OF FIGURES
1. HDSL2 System Model .................................................................................................................................3
2. H2TU-C-388 List 1E Front Panel ................................................................................................................4
3. Installing the H2TU-C 388 List 1E 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.....................................................................................27
11. Master Clear .............................................................................................................................................28
12. Monitor Screen - Active Loopback with Alarms .....................................................................................30
13. H2TU-R DS1 31-day Performance History .............................................................................................33
14. H2TU-R DS1 25-hour Performance History............................................................................................33
15. H2TU-C HDSL2 31-day Performance History........................................................................................35
16. H2TU-R DS1 Current Statistics...............................................................................................................36
17. H2TU-C DS1 Current Statistics...............................................................................................................36
18. H2TU-C-388 HDSL2 Current Statistics ..................................................................................................37
19. H2TU-C DS1 Alarm History Screen........................................................................................................38
20. H2TU-R DS1 Alarm History Screen........................................................................................................38
21. H2TU-R DS1 Alarm History Screen........................................................................................................40
22. System Event Log.....................................................................................................................................41
23. H2TU-R LOS/AIS Response Priorities....................................................................................................45
24. Loopback Summary..................................................................................................................................46
25. Loopback Modes ......................................................................................................................................51
26. H2TU-C-388 List 1E Card-Edge Connector............................................................................................58
27. 210-to-DB-9 Adapter................................................................................................................................59
28. H2TU-C-388 List 1E Block Diagram Timing..........................................................................................60

List of Tables 152-388-115-03, Issue 03
viii April 21, 2000 H2TU-C-388 List 1E
LIST OF TABLES
1. Front-panel Description............................................................................................................................... 5
2. Front-panel Display Messages..................................................................................................................... 6
3. Navigational Keys for the HiGain HDSL2 Maintenance Terminal Screens............................................. 13
4. Logon Screen Menus ................................................................................................................................. 14
5. H2TU-C-388 List 1E Standard Config Screen Options ............................................................................ 19
6. H2TU-C-388 List 1E PairGain Config Screen Options ............................................................................ 20
7. DS1/DSX-1 24-hour PM Threshold .......................................................................................................... 22
8. Response to H2TU-R DS1 Frame Conversion Options ............................................................................ 23
9. Extended SuperFrame Format ................................................................................................................... 23
10. SuperFrame Format ................................................................................................................................. 24
11. DDS NI and DS0 DP Latching Loopback Sequence............................................................................... 25
12. HiGain HDSL2 Loopback vs. Latching Sequence.................................................................................. 25
13. Response of H2TU-C and H2TU-R to LOS and AIS.............................................................................. 26
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...................................................... 35
17. DS1 Alarm Descriptions.......................................................................................................................... 39
18. HDSL2 Alarm Descriptions..................................................................................................................... 40
19. Event Log Entry Messages ...................................................................................................................... 42
20. Front-Panel System Alarms Summary .................................................................................................... 43
21. Summary of HiGain HDSL2 Loopback Codes and Activation Methods................................................ 47
22. Addressable Repeater Loopback Commands (A2LB)............................................................................. 52
23. Addressable Repeater Loopback Commands (A3LB and A4LB)........................................................... 55
24. H2TU-C-388 Power Parameters—No Regenerator................................................................................. 57

152-388-115-03, Issue 03 Overview
H2TU-C-388 List 1E April 21, 2000 1
OVERVIEW
The ADC HiGain®product family is the industry’s first practical implementations of High bit-rate Digital
Subscriber Line 2 (HDSL2). HiGain products are fully compliant with the HDSL2 standard. Providing full-rate
T1 access using just a single copper pair, HDSL2 is a cost-effective solution and offers an open architecture. The
open architecture inherent in HDSL2 guarantees interoperability, allowing simple, economic accommodation of
network growth.
HiGain HDSL2 products provide 1.552 Mbps transmission on one unconditioned copper pair over the fullCarrier
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-388 List 1E line unit is the Central Office (CO) side of a T1 transmission system.
•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
•HiGain HDSL2 maintenance screens for inventory, provisioning, and troubleshooting
–High-performance, non-volatile performance monitoring
–Non-volatile alarm histories
–Performance Report Messaging (PRM) support for Supplemental PRM (SPRM) and Network PRM
(NPRM) at the H2TU-R
•Configuration options
–Selectable DS1 pre-equalizer
–Bipolar Violation Transparency (BPVT) options
–Bit Error Rate (BER) alarm
–Loss of Signal/Alarm Indication Signal (LOS/AIS) payload alarm option
–Remote provisioning
–Selectable loopback activation codes
•Compatible with Double Dual Module Plus (DDM+) high-density shelves
•Flash download of firmware updates
•Digital Data Service (DDS) latching loopback
•Payload (PL) and HiGain (HG) loopback source identification
•Network Management and Administration (NMA) interface

Overview 152-388-115-03, Issue 03
2 April 21, 2000 H2TU-C-388 List 1E
•Margin threshold alarm
COMPATIBILITY
The H2TU-C-388 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 DS1 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 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 Ω.In
general, HiGain HDSL2 systems:
•Operate effectively in the samecable binder group withother HDSL2 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.

152-388-115-03, Issue 03 Overview
H2TU-C-388 List 1E April 21, 2000 3
Figure 1. HDSL2 System Model

Front Panel 152-388-115-03, Issue 03
4 April 21, 2000 H2TU-C-388 List 1E
FRONT PANEL
Figure 2 shows the H2TU-C-388 List 1Efront 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 56.
Figure 2. H2TU-C-388 List 1E Front Panel
Front-panel display
List number
RS-232 craft port
Setup buttons
Status LED
Configuration number
CLEI and ECI
bar code label
H
2
T
U
•
C
3
8
8
HiGain
SOLITAIRE
L
RS
232
DCE
STATUS
SETUP
MODE SEL
PairGain
HDSL2

152-388-115-03, Issue 03 Front Panel
H2TU-C-388 List 1E 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. Table 2 on
page 6 lists the four-character messages.
MODE and SEL system option
buttons Permits user options to be monitored and modified without the need for 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 Customer Remote Loopback (CREM) or a Network Local Loopback (NLOC) is
in effect.
Flashing yellow H2TU-C-388 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-388.
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
Digit 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 152-388-115-03, Issue 03
6 April 21, 2000 H2TU-C-388 List 1E
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 CutOff A system alarm has occurred and has been retired to an ACO
condition once the SEL button on the H2TU-C front panel is pressed.
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 Remote Alarm Indication Signal 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.
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.
PWR FEED GND Ground The HDSL2 loop is grounded.
PWR FEED OPEN Open Indicates a line power open condition.
PWR FEED SHORT Short Indicates a short between the Tip and Ring of the HDSL2 pair.
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 Remote Alarm Indication at the H2TU-R - Indicates an RAI alarm
(yellow) from the CPE with errors from the line unit or network.
TRCI TX RAI-CI Indication - Customer
Installation Upon reception of an RAI (yellow alarm) 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 to the network.
TUC Transmission Unit Central Office Accompanies the HBER, MAL, and LA alarms 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 alarms and indicates that the
alarm has occurred at the H2TU-R remote unit.
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 the H2TU-C.
NLOC Network Local Loopback DSX-1 signal is looped back to the network at the H2TU-C.
Continued

152-388-115-03, Issue 03 Front Panel
H2TU-C-388 List 1E April 21, 2000 7
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. 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, as described in
“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 push
buttons are disabled.
PWR FEED OFF Power Feed Off HDSL2 span power has been turned off by setting the PWFD option
to off or by using 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.
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, 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-388 List Number The list number of the H2TU-C-388.
MARG xx Margin The current margin threshold setting measured in dB.
VER x.xx H2TU-C-388 Software Version The software version number (x.xx).
(a) System Information Messages are displayed in Scroll Mode. To scroll through the messages, press the MODE and SEL
buttons for 3 or more seconds.
Table 2. Front-panel Display Messages (Cont.)
Message Full Name Description

Installation 152-388-115-03, Issue 03
8 April 21, 2000 H2TU-C-388 List 1E
INSTALLATION
Figure 3. Installing the H2TU-C 388 List 1E 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.
2Press on the H2TU-C front-panel to seat it.
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.
CO Shelf
H2TU-C-388
CODE
HCRC
LBK
L
MARG
ARM
B8ZS
LBK
RLOS
DLOS
HLOS
STAT
H2TU-C388
M
O
N
L
I
N
E
M
O
NX
M
T
L
I
N
E
V
C
R
X
.
1
S
D
HiGain
HDSL2
L
R
S
-
2
3
2
D
C
E
PairGain

152-388-115-03, Issue 03 Installation
H2TU-C-388 List 1E April 21, 2000 9
VERIFICATION
Once the H2TU-C-388 is installed, verify that it is operating properly. To do this, monitor the following:
•Status LED
•Status messages reported by the front-panel display, as described in 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 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:
aIf 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.
bIf 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.
aIf 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.
bIf 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 152-388-115-03, Issue 03
10 April 21, 2000 H2TU-C-388 List 1E
PROVISIONING REQUIREMENTS
Refer to “Provisioning”on page 11 for instructions on configuring and monitoring the H2TU-C-388.
The H2TU-C-388 List 1E can be provisioned by using the MODE and SEL buttons on the front panel or by
accessing the HiGain 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 HDSL2 maintenance screens can
handle all provisioning tasks. The maintenance screens are available when you connect a PC to the craft port.
After a successful installation, complete the following tasks:
1Set the Date and Time, as described in “Setting Date and Time”on page 15.
2Set the circuit IDs, as described in “Setting Circuit ID Numbers”on page 16.
3Make changes to configuration, as described in “Making Changes to the System Configuration”on page 17.
4Clear the Performance, Alarm history, and Event Log screens to remove miscellaneous data acquired during
Startup or use Master Clear in the Master Clear in the Config Menu. This ensures the collection of accurate
and meaningful data, as described in “Clearing the History, Alarm, and Event Log Screens”on page 28.

152-388-115-03, Issue 03 Provisioning
H2TU-C-388 List 1E April 21, 2000 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 or scroll mode
–Select system loopbacks
•Use a maintenance terminal, such as ASCII 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 HDSL2 maintenance screens. The
maintenance screen, shown in Figure 4 on page 14, provides 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 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 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-388 is unplugged.

Provisioning 152-388-115-03, Issue 03
12 April 21, 2000 H2TU-C-388 List 1E
Resetting to Factory Default Values
All user options for the H2TU-C-388 List 1E, described in 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 until the DFLT NO message appears.
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 through the current settings of all system parameters, press the MODE button for 3 or more seconds. The
H2TU-C displays the following parameters:
•H2TU-C-388 software version number
•H2TU-C-388 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 buttons. This turns
off the Alarm Cutoff (ACO) indication.
Loopback Modes
“Loopback Operation”on page 46 provides instructions on using the MODE and SEL buttons to activate
loopbacks.