ADC HiGain H2TU-C-231 User manual

HiGain
HiGain
TECHNICAL PRACTICE
4E
H2TU-C-231 List 4E Line Unit
Product Catalog: H2TU-C-231-L4E
CLEI: VACJDLHE

LTPH-TP-1034-01, Issue 1
ii September 28, 2001 H2TU-C-231 List 4E
Revision History of This Practice
To order copies of this document, use document catalog number LTPH-TP-1034-01.
Copyright
September 28, 2001
© 2001 ADC DSL Systems, Inc. All rights reserved.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc.
HiGain is a registered trademark of 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
1September 28, 2001 Initial release.

LTPH-TP-1034-01, Issue 1 Using This Technical Practice
H2TU-C-231 List 4E September 28, 2001 iii
USING THIS TECHNICAL PRACTICE
The following conventions are used in this manual:
•Monospace type indicates screen text.
•Keys you press are indicated by small icons such as or . Key combinations to be pressed
simultaneously are indicated with a plus sign as follows: + .
•Items you select are in bold.
•Three types of messages, identified by icons, appear in text.
For a list of abbreviations used in this document, refer to “Appendix E - Abbreviations” on page 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. 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 as described in “Returns” on page 63. If you must store the equipment for a
prolonged period, store the equipment in its original container.
Notes contain information about special circumstances.
Cautions indicate the possibility of personal injury or equipment damage.
The Electrostatic Discharge (ESD) symbol indicates that a device or assembly is susceptible to
damage from electrostatic discharge.
YENTER
CTRL ESC

Inspecting Shipment LTPH-TP-1034-01, Issue 1
iv September 28, 2001 H2TU-C-231 List 4E

LTPH-TP-1034-01, Issue 1 Table of Contents
H2TU-C-231 List 4E September 28, 2001 v
TABLE OF CONTENTS
Overview_____________________________________________________________________________1
Features..............................................................................................................................................1
Compatibility .....................................................................................................................................2
Applications.......................................................................................................................................2
Front Panel___________________________________________________________________________3
Installation ___________________________________________________________________________7
Verification ........................................................................................................................................8
Verification without an H2TU-R Remote Unit...................................................................8
Verification with an H2TU-R Remote Unit........................................................................8
Provisioning __________________________________________________________________________9
Using the MODE and SEL Pushbuttons............................................................................................9
Setting Options through MODE and SEL...........................................................................9
Resetting to Factory Defaults ............................................................................................10
Displaying System Parameter Settings..............................................................................10
Disabling an Alarm............................................................................................................10
Loopback Modes ...............................................................................................................10
Using a Maintenance Terminal........................................................................................................10
Connecting to a Maintenance Terminal.............................................................................10
Logon Screen.....................................................................................................................11
Provisioning Tasks...........................................................................................................................13
Setting Date and Time.......................................................................................................13
Setting Circuit ID Numbers...............................................................................................14
Configuring the System.....................................................................................................15
Clearing the History, Alarm, and Event Log Screens .......................................................26
Monitoring System Activity and Performance_____________________________________________28
Using the Monitor Screen to View System Activity .......................................................................28
Using the Performance Screens to View Performance Data ...........................................................30
Performance History at the DS1 Interface.........................................................................30
Performance History at the HDSL2 Interface ...................................................................34
Using the Performance Screens to View Alarm Data......................................................................36
Alarm History at the DS1 Interface...................................................................................36
Alarm History at the HDSL2 Interface..............................................................................39
Using the System Event Log to Track Events .................................................................................40
Using the Report Menu....................................................................................................................42

Table of Contents LTPH-TP-1034-01, Issue 1
vi September 28, 2001 H2TU-C-231 List 4E
Testing _____________________________________________________________________________ 44
System Alarms................................................................................................................................. 44
Alarm Option for Digital Loop Carrier (DLC) Feed ........................................................ 45
Retiring System Alarms.................................................................................................... 45
Remote LOS and AIS Response....................................................................................... 46
OCT55 Test Pattern with AMI Code............................................................................................... 46
Loopback Operation........................................................................................................................ 47
Generic Loopback Commands.......................................................................................... 48
Special Loopback Commands........................................................................................... 48
SmartJack Loopback Commands...................................................................................... 49
Manual Loopback Session............................................................................................................... 49
In-Band Loopback Sessions............................................................................................................ 50
General Troubleshooting Tips .......................................................................................... 50
GNLB Test Procedures..................................................................................................... 50
A2LB Test Procedures...................................................................................................... 52
A3LB and A4LB Test Procedures .................................................................................... 54
SmartJack Test Procedure................................................................................................. 54
Appendix A - Specifications____________________________________________________________ 55
Power Consumption ........................................................................................................................ 56
Maximum Power Dissipation.......................................................................................................... 56
Maximum Current Drain................................................................................................................. 56
Loop Attenuation............................................................................................................................. 57
H2TU-C-231 List 4E Card-Edge Connector................................................................................... 58
Network Management Control Bus .................................................................................. 58
Fuse Alarm........................................................................................................................ 59
System Alarm Output Pins................................................................................................ 59
Craft Port......................................................................................................................................... 59
Appendix B - Functional Operation _____________________________________________________ 60
Timing ............................................................................................................................................. 61
Ground Fault Detect........................................................................................................................ 61
Appendix C - Compatibility____________________________________________________________ 62
Appendix D - Product Support _________________________________________________________ 63
Technical Support............................................................................................................................ 63
Returns............................................................................................................................................. 63
Appendix E - Abbreviations____________________________________________________________ 64
Certification and Warranty______________________________________________ Inside Back Cover

LTPH-TP-1034-01, Issue 1 List of Figures
H2TU-C-231 List 4E September 28, 2001 vii
LIST OF FIGURES
1. H2TU-C-231 List 4E Front Panel ....................................................................................................................3
2. Installing the H2TU-C-231 List 4E into a Shelf ..............................................................................................7
3. Logon Screen..................................................................................................................................................12
4. Config Menu - Date and Time........................................................................................................................13
5. Inventory Screen.............................................................................................................................................14
6. Config Menu...................................................................................................................................................15
7. Config Menu - Standard Options (defaults shown)........................................................................................16
8. Config Menu - ADC Options (defaults shown) .............................................................................................16
9. Config Menu - Set Factory Defaults ..............................................................................................................26
10. Config Menu - Master Clear...........................................................................................................................27
11. Monitor Screen - Active Loopback with Alarms ...........................................................................................28
12. H2TU-R DS1 31-Day Performance History ..................................................................................................30
13. H2TU-C DS1 48-Day Performance History ..................................................................................................31
14. H2TU-R DS1 25-Hour Performance History.................................................................................................31
15. H2TU-R DS1 Current Statistics.....................................................................................................................32
16. H2TU-C DS1 Current Statistics.....................................................................................................................32
17. H2TU-C HDSL2 31-Day Performance History.............................................................................................34
18. H2TU-C HDSL2 48-Hour Performance History ...........................................................................................34
19. H2TU-C HDSL2 25-Hour Performance History ...........................................................................................35
20. H2TU-C HDSL2 Current Statistics................................................................................................................35
21. H2TU-C DS1 Alarm History Screen..............................................................................................................37
22. H2TU-R DS1 Alarm History Screen..............................................................................................................37
23. H2TU-C HDSL2 Alarm History Screen ........................................................................................................39
24. System Event Log...........................................................................................................................................40
25. Report Menu - Full Report.............................................................................................................................42
26. H2TU-R LOS and AIS Response Priorities...................................................................................................46
27. Loopback Summary........................................................................................................................................47
28. Loopback Modes............................................................................................................................................51
29. H2TU-C-231 List 4E Card-Edge Connector..................................................................................................58
30. RS-232 Craft Port Pinouts..............................................................................................................................59
31. H2TU-C-231 List 4E Block Diagram ............................................................................................................60

List of Tables LTPH-TP-1034-01, Issue 1
viii September 28, 2001 H2TU-C-231 List 4E
LIST OF TABLES
1. Front-Panel Description................................................................................................................................... 4
2. Front-Panel Display Messages......................................................................................................................... 5
3. Navigational Keys for the Maintenance Terminal Screens ........................................................................... 11
4. Logon Screen Menus .................................................................................................................................... 12
5. H2TU-C-231 List 4E Standard Config Menu Options.................................................................................. 17
6. H2TU-C-231 List 4E ADC Config Menu Options........................................................................................ 18
7. DS1 and DSX-1 24-Hour PM Threshold....................................................................................................... 21
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..................................................................................... 24
12. HiGain HDSL2 Loopback vs. Latching Sequence........................................................................................ 25
13. Response of H2TU-C and H2TU-R to LOS and AIS.................................................................................... 25
14. Monitor Screen Descriptions ......................................................................................................................... 29
15. Error Acronyms Used on the DS1 Performance History Screens ................................................................. 33
16. Error Acronyms Used on the HDSL2 Performance History Screens............................................................ 36
17. DS1 Alarm Descriptions................................................................................................................................ 38
18. HDSL2 Alarm Descriptions........................................................................................................................... 39
19. Event Log Entry Messages List..................................................................................................................... 41
20. Report Types.................................................................................................................................................. 43
21. Front-Panel System Alarms Summary ......................................................................................................... 44
22. Summary of HiGain HDSL2 Generic Loopback Codes and Activation Methods........................................ 48
23. Addressable Repeater Loopback Commands (A2LB)................................................................................... 52
24. Addressable Repeater Loopback Commands (A3LB and A4LB)................................................................. 54
25. SmartJack Loopup and Loopdown Commands............................................................................................. 54
26. H2TU-C Power Parameters ........................................................................................................................... 56
27. HDSL2 Cable Attenuation Chart................................................................................................................... 57

LTPH-TP-1034-01, Issue 1 Overview
H2TU-C-231 List 4E September 28, 2001 1
OVERVIEW
The H2TU-C-231 List 4E 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 T1.418-2000. 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 1.544 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
•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)
–Sources sealing current when connected to an H2TU-R-402 List 5E or higher
•Front-panel provisioning features
–Four-character status display
–DS1 splitting and bridging access
–Status Light Emitting Diodes (LEDs)
–RS-232 craft port for connection to a maintenance terminal
–MODE and SEL pushbuttons
•Maintenance screens for inventory, provisioning, and troubleshooting
–DS1 and HDSL2 performance monitoring
–Non-volatile alarm histories
–Performance Report Messaging (PRM) support for Supplemental PRM (SPRM) and Network PRM
(NPRM) at the H2TU-R
–Payload (PL) and HiGain (HG) loopback source identification
–Margin Alarm (MAL) threshold
–Report menu option for downloading status and performance monitoring data to a file
•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

Overview LTPH-TP-1034-01, Issue 1
2 September 28, 2001 H2TU-C-231 List 4E
–Supports the in-band 100 loopdown command for all loopback modes
–Supports the in-band 100000 loopup command when SmartJack loopback (LPBK) option is enabled
–Power Back Off Customer (PBOC) and Power Back Off Network (PBON) options for configuring power
output levels
•Compatible with Small Cross-Section Shelf (SXSS) and equipment
•Digital Data Service (DDS) latching loopback
•Network Management and Administration (NMA) interface
•Supports interoperability
COMPATIBILITY
The H2TU-C-231 List 4E is designed to mount in 220 mechanics shelves. For a list of compatible shelves, see
“Appendix C - Compatibility” on page 62.
APPLICATIONS
HiGain HDSL2 systems provide a cost-effective, easy-to-deploy method for delivering T1 High Capacity Digital
Service (HCDS) over a single copper pair. HiGain HDSL2 systems support a multitude of network connections.
•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 in the same cable binder group with other HDSL2 lines, HDSL, DS1, 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-TP-1034-01, Issue 1 Front Panel
H2TU-C-231 List 4E September 28, 2001 3
FRONT PANEL
Figure 1 shows the H2TU-C-231 List 4Efront panel. Table 1 on page 4 describes the front-panel components. For
pinout diagrams of the H2TU-C card-edge connector and craft port, refer to “Appendix A - Specifications” on
page 55.
Figure 1. H2TU-C-231 List 4E Front Panel
H
2
T
U
•
C
2
3
1
MODE SEL
OUT
BRG
IN
L
LINE
LINE
BRG
DSX-1
R
S
2
3
2
SETUP
STATUS
Front-panel display
DSX-1 access jacks
Craft port
List number
Retaining latch
Status LED
MODE and SEL pushbuttons
4E
HiGain
HDSL2
CLEI and ECI
barcode label

Front Panel LTPH-TP-1034-01, Issue 1
4 September 28, 2001 H2TU-C-231 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 SEL pushbuttons reactivate the display and restart the
5-minute timer. Refer to Table 2 on page 5 for a listing of the four-character messages.
MODE and SEL pushbuttons Permits the user options to be monitored and modified without the need of a maintenance
terminal. Used to initiate all HiGain HDSL2 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 Customer Remote Loopback (CREM) or a Network Local Loopback (NLOC) is in
effect.
Flashing yellow H2TU-C 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.
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.
Retaining latch Retains the card in the shelf when pulled up and extracts the card from the shelf when pulled
down.

LTPH-TP-1034-01, Issue 1 Front Panel
H2TU-C-231 List 4E September 28, 2001 5
Table 2 lists the front-panel display messages. The four-character display reports the code of a pertinent alarm,
loopback, or diagnostic message and, in some cases, is followed by a 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
by pressing the SEL 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 Line Alarm Indication Signal Indicates an AIS (unframed all ones) pattern is being received or
transmitted at the H2TU-C DS1 input or output ports.
LLOS Line (Unit) Loss of Signal Indicates that no signal is detected at the DSX-1 input to the H2TU-C.
Causes a system alarm.
LOSW Loss of Sync Word Indicates that the HDSL2 loop has lost synchronization.
MAL Margin Alarm The margin on HDSL2 loop has dropped below the threshold
(0 to 15 dB) as set by the operator.
PWR FEED GND Power Feed Ground The HDSL2 loop is grounded.
PWR FEED OPEN Power Feed Open Indicates a line power open condition.
PWR FEED SHRT Power Feed Short Indicates a short between the Tip and Ring of the HDSL2 pair.
PRMF Performance Report Messaging -
Far End H2TU-R PRM-FE BER threshold has been exceeded.
PRMN Performance Report Messaging -
Near End H2TU-R PRM-NE BER threshold has been exceeded.
RAIS Remote Alarm Indication Signal Indicates an AIS (unframed all ones) pattern is being received or
transmitted at the H2TU-R DS1 input or output ports.
RLOS Remote (Unit) 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) from the CPE with errors from the line
unit or network.
TRCI Transmit RAI-CI—Remote Alarm
Indication at the H2TU-R (Net signal
does not have errors.)
Upon reception of an RAI (yellow) from the CPE, the H2TU-R sends
RAI-CI towards the network if the network signal received at the H2TU-R
is clear. If the network signal is impaired (LOS, AIS, or LOF), then the
RAI is passed on to the network unaltered.
TUC Transmission Unit Central Office Accompanies the DBER, HBER, MAL, and LA alarm and indicates that
the alarm has occurred at the H2TU-C central office unit.
TUR Transmission Unit Remote End Accompanies the DBER, HBER, MAL, and LA alarm and indicates that
the alarm has occurred at the H2TU-R remote unit.
Continued

Front Panel LTPH-TP-1034-01, Issue 1
6 September 28, 2001 H2TU-C-231 List 4E
LOOPBACK MESSAGES
CLOC Customer Local Loopback DS1 signal from customer is looped back to the customer at the H2TU-R.
CREM Customer Remote Loopback DS1 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 are trying to establish
synchronization over the HDSL2 loop.
ARM HiGain System Armed Armed to respond to Intelligent Repeater Loop (ILR) codes.
BAD RT? No Response from H2TU-R The H2TU-C does not receive any response from the H2TU-R. Therefore,
the integrity of the H2TU-R or the HDSL2 loop is questionable.
FERR Framing Bit Error Occurred Framing bit error occurred at H2TU-C DSX-1 input.
FLDL Flash Download Flash download of firmware upgrades. Contact Customer Service for
upgrade procedures (see “Appendix D - Product Support”on page 63.)
HES HDSL2 CRC Error H2TU-C HDSL2 Loop Cyclical Redundancy Check (CRC) error.
LBPV Local Bipolar Violation A bipolar violation has been received at the DSX-1 input to the
H2TU-C-231.
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-231 is under control of the HMU-319 network management
unit. In this state, the front-panel craft port and pushbuttons are
disabled.
PWR FEED OFF Power Feed Off HDSL2 span power has been turned off by setting the PWFD option to
OFF, or HDSL2 span power has been turned off by use of the A2LB
Intelligent Office Repeater (IOR) powerdown code.
PWR FEED ON Power Feed On Indicates that the HDSL2 loop is not grounded or shorted.
SIG Signaling The transceivers of the H2TU-C and H2TU-R are trying to establish
contact with each other over the HDSL2 loop.
SYSTEM INFORMATION MESSAGES (a)
CODE xxxx Line Code: AMI, B8ZS DS1 line code: Alternate Mark Inversion (AMI) or Bipolar with 8-Zero
Substitution (B8ZS).
FRM xxxx Frame: SF, ESF, UNFR Defines the type of frame pattern being received from the DSX-1:
SuperFrame (SF), Extended SuperFrame (ESF), or Unframed (UNFR).
LATT xx Loop Attenuation Current loop attenuation threshold setting is measured in dB.
LIST xx List Number List number of the H2TU-C-231.
MARG xx Margin Current margin threshold setting is measured in dB.
VER x.xx Software Version Number Software version number of the H2TU-C-231.
(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

LTPH-TP-1034-01, Issue 1 Installation
H2TU-C-231 List 4E September 28, 2001 7
INSTALLATION
Figure 2. Installing the H2TU-C-231 List 4E into a Shelf
1Align the H2TU-C with the enclosure slot guides and slide the unit in. Push the unit back until it touches the
backplane card-edge connector, and the retaining latch on the front panel opens.
2Place your thumbs on the front panel and push the H2TU-C into the card-edge connector until the retaining
latch closes. This indicates that the card 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-231 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-231 List 4E DSX-1 output ports to the
cross-connect panel must be grounded at both ends.
CO Shelf
H2TU-C-231

Installation LTPH-TP-1034-01, Issue 1
8 September 28, 2001 H2TU-C-231 List 4E
VERIFICATION
Once the H2TU-C-231 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).
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 for a list of messages.)
2Verify that the H2TU-C attempts to communicate with a remote unit (status LED flashes red). Even if a
remote unit is not present, the following events should occur:
aThe front-panel display reports various four-character status messages.
bThe H2TU-C again attempts communication with a remote unit until a remote unit is detected.
Verification with an H2TU-R Remote Unit
If an H2TU-R remote unit has been installed:
1Verify that the H2TU-C powers up. (The front-panel display illuminates and reports various status messages.)
2Verify that the H2TU-C attempts to communicate with the remote unit (status LED flashes red). One of the
following occurs:
•If the remote unit is successfully identified and the HDSL2 loop synchronizes, the H2TU-C status LED
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.

LTPH-TP-1034-01, Issue 1 Provisioning
H2TU-C-231 List 4E September 28, 2001 9
PROVISIONING
There are two methods for provisioning:
•Use the MODE and SEL 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
•Use a maintenance terminal (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 maintenance screens (see Figure3onpage12).
This gives you full access to all H2TU-C status, history, inventory, and provisioning screens.
USING THE MODE AND SEL PUSHBUTTONS
Setting Options through MODE and SEL
To provision the H2TU-C-231 List 4E through the MODE and SEL pushbuttons on the front panel:
1Press the MODE pushbutton for 1 second and release it. The front-panel display alternately shows the first
system parameter and its current setting.
2Press the SEL 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 currently 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 SEL pushbutton. (A CONF YES message appears
and returns to its normal mode after saving the new changes.)
No dip switches or jumpers are required to provision the H2TU-C-231 as it contains a
non-volatile RAM (NVRAM) which stores the system option settings. System option settings are
retained if shelf power is lost or the H2TU-C-231 is unplugged.

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10 September 28, 2001 H2TU-C-231 List 4E
Resetting to Factory Defaults
All user options for the H2TU-C-231 List 4E (Table 6 on page 18) can be set to the factory default values using
the MODE and SEL pushbuttons. To set the user options to their default values:
1Press the SEL pushbutton for 6 seconds until the following message appears:
DFLT NO
2Press the SEL pushbutton 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 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:
•Software version number
•List number
•Type of frame pattern received from the DSX-1
•Line code of the signal received from the DSX-1
•All user-configured parameter settings
•Loop attenuation threshold setting
•Margin alarm threshold setting
Disabling an Alarm
System alarms can be disabled by pressing the SEL pushbutton on the H2TU-C-231 front panel. This executes an
ACO and returns the H2TU-C-231 to its non-alarm state. For more information, see “Retiring System Alarms”on
page 45.
Loopback Modes
See “Loopback Operation”on page 47 for instructions on using the MODE and SEL pushbuttons to activate
loopbacks.
USING A MAINTENANCE TERMINAL
Connecting to a Maintenance Terminal
The craft port on the front panel allows you to connect the H2TU-C-231 List 4E to a maintenance terminal (ASCII
terminal or PC running a terminal emulation program). Onceconnected to a maintenance terminal, you can access
the maintenance, provisioning, and performance screens.

LTPH-TP-1034-01, Issue 1 Provisioning
H2TU-C-231 List 4E September 28, 2001 11
To connect to a maintenance terminal:
1Connect a standard 9-pin terminal cable to the RS-232 craft port (Figure1onpage3) on the H2TU-C-231
List 4E 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 (emulating a VT100 terminal).
4Configure the maintenance terminal to the following communication settings:
•9600 baud
•No parity
•8databits
•1 stop bit
•Hardware flow control to OFF
5If necessary, press + to refresh the logon screen.
Logon Screen
The maintenance terminal screens allow you to monitor, provision, and troubleshoot an H2TU-C-231 system.
To select a menu from the logon screen (Figure3onpage12), do one of the following:
•Press the underlined letter of the menu.
•Use the arrow keys to select the menu, and then press .
Table 3 summarizes the navigational keys. They are also listed in the onscreen Help menu. Table 4 on page 12
describes the Logon screen menus.
Table 3. Navigational Keys for the Maintenance Terminal Screens
Key (a)
(a) Legacy management units require use of control keys instead of arrow keys.
Function
Cycle through selections.
Activate the current setting or choice, or display a menu.
or (VT100 only) 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.
Most VT100 emulation programs support a print screen option. For Windows-based programs,
such as Procomm or HyperTerminal, see the Help menu for instructions.
CTRL R
← → ENTER
SPACEBAR
ENTER
ESC F11
↑CTRL E
↓CTRL X
→CTRL D
←CTRL S
CTRL R

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12 September 28, 2001 H2TU-C-231 List 4E
Figure 3. Logon Screen
Table 4. Logon Screen Menus
Press this key: To access this menu: Menu Functions
Monitor Monitors loopbacks and alarms, and provides a graphical representation of circuit
activity, including ES, UAS, SES, and line code.
Performance Provides performance and alarm histories for current, 25-hour, 48-hour, or 31-day
periods for either the DS1 or HDSL2 interface.
Event Log Identifies the 100 most recent system events and reports the origin, date and time of
occurrence, and message.
Config Provides standard configuration options, ADC options, date and time setting, and a reset
option (factory settings). Also provides a master clear option that clears all performance,
alarm, and event log entries.
Inventory Provides product information about the various devices that are in the system and lists
circuit and device identifications.
Report Provides four types of reports: Full Report, Short Report, System Information Report,
and Event Report.
Rlogon / Rlogout Remote log on can be performed from the H2TU-C or H2TU-R. The screen displays
“Rlogout”when the H2TU-C or H2TU-R is remotely logged on to the other unit at the end
of the circuit.
To log off the remote unit, press . “Rlogout”changes to “Rlogon”. The unit is now
locally logged on until is pressed again to reinitiate the remote log on.
Help Provides a glossary of terms used in the maintenance screens, a list of navigational keys,
print guide, and ADC contact information.
Circuit ID Date and Time Logon Device System Status
Menu bar
Monitor Performance Event Log Config Inventory Report Rlogon Help
+------------------------------------------+
||
| ADC DSL Systems, Inc. |
| HiGain HDSL2 |
||
| Voice: 800.638.0031 |
| Fax : [phone] |
+------------------------------------------+
ID: xxxx--xxxx--xxxx—-xxxx 09/01/2001 12:30:01 H2TU-C System: OK___
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