ADC HiGain HLU-200 User manual

HiGain
HiGain
USER MANUAL
HLU200 L1A
AHT1U
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HLU-200 List 1A Line Unit
ProductCatalog: 350-200-111-02
CLEI: SLL2U6LG

350-200-111-02, Issue 2
ii October 4, 1999 HLU-200 List 1A
Revision History of This Manual
To order copies of this document, use document catalog number
350-200-111-02.
Copyright
October 4, 1999
© 1999 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 inthis document is company privateto ADC DSL Systems, Inc.,
and shall not be modified, used, copied, reproduced or disclosed in whole or in part
without the written consent of ADC.
Contents herein are current as of the date of publication. ADC reserves the right to
change the contents without prior notice. In no event shall ADC be liable for any
damages resulting from loss of data, loss of use, or loss of profits, and ADC further
disclaims any and all liability for indirect, incidental, special, consequential or other
similar damages. This disclaimer of liability applies to all products, publications and
services during and after the warranty period.
Issue Release Date Revisions Made
1October 4, 1999 Initial Release
2February 14, 2002 ADC Rebranding

350-200-111-02, Issue 2 Using This Manual
HLU-200 List 1A October 4, 1999 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 indicatedwith a plus sign
as follows: + .
•Items you select are in bold.
Three types of messages, identified by icons, appear in text.
UNPACK AND INSPECT YOUR SHIPMENT
Upon receipt of the equipment:
•Unpack each container and inspect the contents for signs of damage. If
theequipmenthasbeendamaged in transit, immediately report theextent
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 Product Support on page 23. 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
deviceorassemblyissusceptibletodamagefromelectrostatic
discharge.
YENTER
CTRL ESC

Table of Contents 350-200-111-02, Issue 2
iv October 4, 1999 HLU-200 List 1A
TABLE OF CONTENTS
Overview________________________________________________1
Compatibility............................................................................2
Front Panel ...............................................................................3
Installation ______________________________________________5
Setting the HDSL Line Voltage Option...................................5
Installing the HLU-200 ............................................................6
Provisioning _____________________________________________7
Using the Mode and Select Buttons .........................................7
Default Settings........................................................................8
Using the Craft Port..................................................................8
System Settings ........................................................................9
Troubleshooting_________________________________________12
Alarms....................................................................................12
Loopbacks ..............................................................................13
Four-Character Diagnostic Messages.....................................15
Specifications ___________________________________________17
Power Parameters _______________________________________19
Non Doubler AHT1U Applications .......................................19
Doubler AHTIU Applications................................................20
Product Support_________________________________________23
Certification andWarranty_____________ Inside Back Cover

350-200-111-02, Issue 2 Overview
HLU-200 List 1A October 4, 1999 1
OVERVIEW
The ADC®HiGain®Line Unit Model HLU-200 List 1A (AHT1U) is an
asynchronous DS1 interface unit that plugs into the Channel Bank Assembly
(CBA) of a DSC Litespan®2000 optical loop carrier system to provide a
High-bit-rate Digital Subscriber Line (HDSL) interface. The HLU-200 is
essentially an AT1U line unit with the T1line interface circuit replaced by an
HDSL interface circuit. When used in conjunction with a HiGain Remote
Unit (HRU), the system provides 1.544 Mbps transmission on two
unconditioned copper pairs over the full Carrier Serving Area (CSA) range.
The CSA includes loops of up to 12,000 feet of AWG 24 or 9,000 feet of
AWG 26 wire, including bridged taps. The CSA range can be doubled with a
HiGain Doubler Unit (HDU) or tripled with two HDUs.
This guide describes HLU-200 List 1A operationwhen used with andwithout
doublers. The HRU can be placed up to 3000 feet into the network for extra
range withoutdoublers. However, this requires an external Network Interface
Device (NID) to be placed at the Network Interface (NI), and the HRU must
have the Smart-Jack (LB) option set to Disable. The HLU-200 List 1A
powers both the HDU and HRU, but the HRU must be locally powered for
two-doubler applications.
The HLU-200 List 1A is different from the HLU-200 List 1F only in that the
+5 V fuse has been increased from 0.75 A to 1.0 A for improved reliability.

Overview 350-200-111-02, Issue 2
2 October 4, 1999 HLU-200 List 1A
COMPATIBILITY
The HLU-200 List 1A operates as a channel card in a DSC Litespan-2000
Channel Bank. The Litespan-2000 system consists of a Central Office (CO)
bank connected to a remote bank over an Optical Carrier 3 (OC3) fiber link.
Each bank has slots for 56-channel plug-ins. The HLU-200 is typically
installed in the remote bank, where it is used to transmit a T1 payload to a
remote HRU-412. The transmission is over two unconditioned HDSL cable
pairs, with or without doublers. The HLU-200 is the HDSL equivalent to an
AT1U channel card, used to transmit a T1 payload to a remote location over
conventional T1 spans.
The HLU-200 List 1A is compatible with Litespan-2000 software releases
7.1.x and 8.1.x and above. The HLU-200 List 1A is not compatible with the
Litespan-2000 Management System and must be maintained, provisioned
and monitored from the front-panel RS-232 maintenance port.
The HLU-200 can be cross-connected to another HLU-200 or to another
asynchronous T1 channel unit in the same channel bank or in the distant
channel bank. These point-to-point dedicated circuits are initiated by issuing
the standard TL1-based cross-connect commands to the Maintenance and
Test Interface (MTI) card. The MTI card identifies the HLU-200 List 1A as
an AHT1U plug.

350-200-111-02, Issue 2 Overview
HLU-200 List 1A October 4, 1999 3
HLU200 L1A
AHT1U
LOOP
FAIL
HDSL
SETUP
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Status LEDs
RS-232 craft
port
Four-character display
Mode and Select buttons
Pull tab
Test ports
FRONT PANEL
Figure 1. HLU-200 List 1A Front Panel

Overview 350-200-111-02, Issue 2
4 October 4, 1999 HLU-200 List 1A
Table 1. Front Panel Features
Name Function
Status LEDs Indicates system status.
Loop LED Lights whenever any of the HLU-200 system loopbacks are in
effect.
Flashes when the AHT1U is in the armed state for an intelligent
repeater loopback command.
Fail LED A red LED controlled by the CBA. Used with revision 7.1.2, and
higher software versions, this LED lights when the HLU-200 is
first plugged into the CBA and remains lit until the CBA has
finished program download and communication with the
HLU-200. It also lights whenever there is a service-affecting
failurewithintheCBA.(TheLEDremainslitatalltimeswhenthe
HLU-200 is used with revision 7.1.1 CBAs.)
HDSL LED Flashes green during HDSL synchronization.
Lights steady green when both HDSL loops are in sync and no
minor alarm conditions exist.
Flashes red for any of the alarm conditions, or if the on-board
48 V fuse opens.
Lights steady yellow when a self-test is in progress.
System option buttons MODE and SEL buttons are used to set system options.
Four-character display Four-characterLCD that provides status messages for HDSL,
signal-to-noise margin, optional settings, and alarms.
RX and test ports Splitting access and bridging jacks (210-Bantam-type).
RS-232 craft port Accessed through a DB9/210 adapter (p/n 120-1035-01,
shipped with every unit) and configured as Data
Circuit-terminating Equipment (DCE) that allows you to control
the HLU-200 through a maintenance terminal (or a PC with
terminal emulation software).
Pull tab Used to remove the HLU-200 from the CBA.
Unlike the HLU-200 List 1F, the four-character display of the
HLU-200 List 1A does not illuminate when first inserted into a
shelf slot. This conserves power if the entire CBA is power
cycled. The List 1A display illuminates for five minutes when
either of the front-panel buttons, MODE or SEL, is pressed.

350-200-111-02, Issue 2 Installation
HLU-200 List 1A October 4, 1999 5
INSTALLATION
Upon receipt of the equipment, visually inspect it 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.
SETTING THE HDSL LINE VOLTAGE OPTION
The HDSL line powering voltage is set by the S1 switch. Bipolar (BIP) sets
the HDSL line voltage to +65 Vdc on loop 2 (+100 Vdc for doubler circuits)
and -65 Vdc on loop 1 (-100 Vdc for doubler circuits). This setting reduces
the maximum ground referenced voltage but applies positive voltage to the
cable pairs, which could accelerate corrosion on the cable pairs. Unipolar
(UNI) sets the HDSL line voltage to 0 Vdc on loop 2 and to -130 Vdc on loop
1 (-200 Vdc for doubler circuits). This setting keeps the HDSL cable pair
voltage at or below ground potential, thereby avoiding corrosion problems
caused by cable voltages more positive than ground.
The line voltage power supply, used for both options, is ground referenced
and also ground isolated by 200 k9. The ground isolation reduces problems
due to induced noise currents and large surge voltages that are ground
referenced. Ground isolation also reduces ground-fault currents, which
improves product safety. The safety issue depends solely on the differential
voltage across Loop 1 and Loop 2 and is independent of the S1 setting.

Installation 350-200-111-02, Issue 2
6 October 4, 1999 HLU-200 List 1A
INSTALLING THE HLU-200
To install the HLU-200 into a Litespan-2000 channel bank:
1Slide the HLU-200 into the card guides for the desired slot, then push the
unit in until it touches the channel-bank backplane card-edge connector.
2Carefully push the unit in until it is entirely within the card guide, making
sure that the unit is properly seated.
Figure 2. Installing the HLU-200

350-200-111-02, Issue 2 Provisioning
HLU-200 List 1A October 4, 1999 7
PROVISIONING
All HLU-200 List 1A user options can be set using either the front panel
Mode and Select buttons (in conjunction with the four-character display) or
from the Maintenance Terminal menus through a maintenance terminal
connected to the front-panel RS-232 maintenance port.
Only the DS1 line code (B8ZS or AMI) is sent to the Litespan system
manager, which reads the value and then provisionsthe Litespan Gate Array.
The HLU-200 line code setting is not available from OMAPS (Paragraph
14.3) and must be provisioned directly from the HLU-200.
USING THE MODE AND SELECT BUTTONS
To provision the HLU-200 through the SEL and MODE front-panel buttons:
1Press the MODE button for approximately two seconds. The message
displayedon the front panel alternates betweenthefirstsystemparameter
and its current setting.
2Press the SEL button to step through all possible settings (one at a time)
of the parameter being displayed.
3Press the MODE button to select the desired parameter and move to the
next parameter. After you have configured the last parameter, the
display prompts you to confirm the settings.
4Do one of the following:
•Press the SEL button to install the settings.
•Press the MODE button to bypass the settings.
If neither button is pressed in 30 seconds, the settings are bypassed.
The following three user options (Default Settings and Using
the Craft Port on page 8, and System Settings on page 9) must
be set using the maintenance terminal interface: Circuit ID,
Time and Date, DS0 Blocking, and Margin Alarm Threshold.

Provisioning 350-200-111-02, Issue 2
8 October 4, 1999 HLU-200 List 1A
DEFAULT SETTINGS
To return the system options to the original factory default settings:
1Press the SEL button until the DFLT NO message appears.
2Press the SEL button again and DFLT YES displays indicating the
factory default values are now in effect.
To terminate the DFLT mode without setting the factory default values, press
the MODE button or do nothing for 30 seconds.
USING THE CRAFT PORT
The craft port, a 210 bantum jack connector, needs a DB9 adapter. The
HLU-200 front panel allows you to use a standard RS-232 cable to connect
your system to amaintenance terminal or PC for runninga terminal emulation
program. Once connected you can access the maintenance, provisioning, and
performance screens.
To provision the HLU-200 through the craft port:
1Configure the maintenance terminal to the following communication
settings.
•1200 to 9600 baud (9600 baud is recommended)
•Parity: None
•8 data bits
•1 stop bit
•Hardware Flow Control set to None
•VT Terminal Emulation
If using the Microsoft Windows terminal emulation program,
from the Settings, Terminal Preference menu, you must
deselect Show Scroll Bars and Use Function, Arrow, and Ctrl
Keys for Windows.

350-200-111-02, Issue 2 Provisioning
HLU-200 List 1A October 4, 1999 9
2On each screen, enter the key represented by the letter in parentheses for
the parameter to be changed.
•Each entry of the letter scrolls the parameter to its next value.
•After all selections have been made, press to exit and to
confirm the changes. This activates the new choices and returns
control to the Main Menu screen.
SYSTEM SETTINGS
Boldface type indicates the factory default settings for the following system
settings.
Table 2. System Settings
Mode Selection Description
ZBTS ON Informs HiGain that the ESF frame is operating in its ZBTSI mode.
OFF Informs HiGain that the ESF frame is operating in its normal
non-ZBTSI mode.
ESAL 17 Activates the alarm input signal to the Litespan microprocessor
and flashes the red STATUS LED when 17 Errored Seconds (ES)
(17 HDSL CRC errors on either HDSL loop or a total of 17 BPVs
and FERR) occur within a 24-hour period.
170 Activates the alarm input signal to the Litespan microprocessor
and flashes the red STATUS LED when 170 ES (170 HDSL CRC
errorsoneitherHDSLlooporatotalof170BPVsandFERR)occur
within a 24-hour period.
NONE Prevents generation of an alarm due to excessive Errored
Seconds.
LBTO NONE Disables automatic time-out cancellation of all loopbacks.
20 Sets automatic time-out to 20 minutes after initiation.
60 Sets automatic time-out to 60 minutes after initiation.
120 Sets automatic time-out to 120 minutes after initiation.
ALM DIS Disables assertion of the Alarm input signal to the Litespan
processor from the HLU processor. Note the HDSL LED still
flashes Red for an alarm condition even when the ALM DIS option
is chosen.
ENA Enables assertion of the Alarm input signal to the Litespan
processor from the HLU processor.
E C

Provisioning 350-200-111-02, Issue 2
10 October 4, 1999 HLU-200 List 1A
LPBK DIS Configures theHLU-200 toignorethe2-in-5Smart-Jackloopback
command.
ENA Enables the HLU-200 to respond to the 2-in-5 Smart-Jack
loopback command.
SPLB GNLB Configures the HiGain system to respond to the generic
(3-/4-/5-/6-in-7) in-band loopback codes.
A1LB and
A2LB Configures the HiGain system to respond to the Teltrend addressable repeater in-band loopback codes.
A3LB Configures the HiGain system to respond to the Wescom
addressable repeater in-band loopback codes.
A4LB Configures the HiGain system to respond to the Wescom Mod 1
addressable repeater in-band loopback codes.
A5LB Configures the HiGain system to respond to the Teltrend Mod 1
addressable repeater in-band loopback codes.
PWRF DIS Disables powering to the HRU and/or doubler over the HDSL
pairs.
ENA Enables powering to the HRU and/or doubler over the HDSL pairs.
DS1 B8ZS Places both the HLU and HRU into their B8ZS modes.
AMI Places both the HLU and HRU into their AMI modes.
AUTO The AUTO mode is not supported. If selected, the DS1 code
defaults to AMI.
CONF YES Confirms that all operating parameters (except Margin) are to be
updated to the new selections.
NO Prevents newly selected operating parameters from being
updated. These options remain as they were before the setting
options procedure was started.
FRMG AUTO Configures HiGain to operate in an auto-framing (AUTO) mode in
which it continuously searches the input T1 bit stream for a valid
SF or ESF frame pattern. This feature is required for fractional T1
applications (DS0 blocking) where it insures proper channel time
slot alignment. While HiGain can also process unframed data in
this AUTO mode, it is recommended that the UNFR mode be used
for all unframed applications. Using the AUTO mode for unframed
applications runs the risk of detecting “pseudo valid” frame
sequences, which can affect the data integrity.
UNFR Configures HiGain to operate in an unframed mode. This mode
disablestheautoframingprocessandforcesHiGaintofunctionas
a transparent bit pipe.
Table 2. System Settings (Cont.)
Mode Selection Description

350-200-111-02, Issue 2 Provisioning
HLU-200 List 1A October 4, 1999 11
HAIS 2LP CausesHiGain to transmit theAISsignalatboth the HLUand HRU
T1 output ports when both of the HDSL loops are not in sync
(LOSW).
1LP CausesHiGain to transmit theAISsignalatboth the HLUand HRU
T1 output ports when either of the two HDSL loops is not in sync
(LOSW) or if a minor alarm occurs.
SAIS ENA Causes the HRU to transmit the AIS signal toward the CI when in
NREM loopback.
DIS Prevents the AIS signal from being transmitted to the NI and
replaces it with the network test signal, if an HRU List 6 or 8 is
detected, or by a quiet termination (LOS), if an HRU List 7 is
detected.
MARG Range:
0 to 15 dB The MARG (Margin Alarm Threshold) can only be set using the
Maintenance Terminal menus. This setting determines the
minimum allowablemarginbelow whichaminoralarm can occur.
A 0 dB setting disables this option. Default setting is 1 dB.
DS0 BLK The DS0 Blocking Option can only be set using the Maintenance
Terminal menus. The four-character front panel display only
displays the status of the blocking option. BLK indicates at least
one channel is blocked. Blocked channels are replaced by the FF
Idle Code.
NONE Indicates no channels are blocked.
Table 2. System Settings (Cont.)
Mode Selection Description

Troubleshooting 350-200-111-02, Issue 2
12 October 4, 1999 HLU-200 List 1A
TROUBLESHOOTING
Minor alarm and diagnostic messages routinely appear on the HLU-200
front-panel four-character display. This display automatically turns on when
power is initially applied to the HLU-200. To conserve power, the display
remains on for only 5 minutes if neither the MODE or SEL buttons are
pressed. The use of either button activates the four-character display and
restarts the 5-minute power-control timer.
ALARMS
Only one alarm can be displayed at a time, so the highest priority alarm is
displayed if more than one alarm exists. The following table lists the alarms
ordered by priority.
Table 3. Minor alarm and diagnostic message displays.
Message Full Name Description
ALRM
LOSW Loss of Sync Word(1)
(1) When both HDSL loops lose sync word (LOSW), a system alarm condition exists.
However, since the HLU enters a self test cycling mode, the front panel LED lights yellow
instead of red and the SELF TEST message displays instead of the ALRM message.
One of the HDSL loops has lost synchronization.
ALRM RLOS Remote Loss of Signal Loss of the HRU DS1 input signal.
DS1 DS1 BPV errors Indicates that the number of BPVs at the HLU or
HRU DS1 inputs have exceeded the 24-hour ES
threshold.
ALRM MAL1
or
ALRM MAL2
Margin Alarm Loop1
or
Margin Alarm Loop2
Indicates that the margin on HDSL Loop 1 or
Loop 2 has dropped below the threshold (1 to 15
dB) set by the user.
H1ES or
H2ES HDSL CRC Error Channel 1 or Channel 2 IndicatesHDSLLoop1orLoop2hasexceededthe user-defined 24-hour ES CRC threshold.

350-200-111-02, Issue 2 Troubleshooting
HLU-200 List 1A October 4, 1999 13
LOOPBACKS
The HLU-200 loopback messages are listed in the following table. The
GNLB locations and their activation codes are also shown in Figure 3 on
page 14.
Table 4. Loopback Messages
Message Full Name Description
CREM Customer Remote
Loopback Signal from customer is looped back to customer at the HLU.
NLOC Network Local Loopback CBA signal is looped back to CBA at HLU.
CLOC Customer Local
Loopback SignalfromCustomerisloopedback tocustomer at HRU.
NREM Network Remote
Loopback CBA signal is looped back to CBA at HRU.
SMJK Remote Smart-Jack
Loopback Signal from CBA is looped back to CBA at HRU.
TLOS Transmit Loss Of Signal HRU is in a logic loopback state caused by a loss
of its T1 input from the CI, if enabled at the HRU
use the TLOS switch option.
ARM HiGain System ARMED Armed to respond to Intelligent Repeater Loop
Codes.

Troubleshooting 350-200-111-02, Issue 2
14 October 4, 1999 HLU-200 List 1A
The following generic loopback mode diagram (Figure 3), shows the GNLB
locations and their activation codes.
.
Figure 3. Generic Loopback Mode

350-200-111-02, Issue 2 Troubleshooting
HLU-200 List 1A October 4, 1999 15
FOUR-CHARACTER DIAGNOSTIC MESSAGES
The HLU-200 diagnositc messages are listed in the table below.
Table 5. Four-Character Diagnostic Messages
Message Full Name Description
1=xx or 2=yy HDSL Loop Margins Indicates the power of the received HDSL signal
on each loop relative to noise. Any value of 06 or
greater is adequate for reliable system operation.
ACQ 1 or
ACQ2 Acquisition 1 or 2 The multiplexers of the HLU, and HRU or first doubler are trying to establish synchronization
over Loop 1 or Loop 2 of Span 1.
AnL1 or
AnL2 Acquisition nLoop 1
or Loop 2 The multiplexers of the two devices on Span nare
trying to establish synchronization with each
other on Loop 1 or Loop 2, where nisthenumber
of the span.
FRM Frame: SF, ESF,
UNFR, NONE Defines the type of frame pattern being received
from the DSX-1: SuperFrame (SF), Extended
SuperFrame (ESF), Unframed (UNFR), or NONE.
Displayed during System Settings review mode.
SIG 1 or
SIG 2 Signal 1 or Signal 2 The transceivers of the HLU, and HRU or first
doubler are trying to establish contact with each
other on Loop 1 or Loop 2 of Span 1.
SnL1 or
SnL2 Signal nLoop 1
or Loop 2 The transceivers of the two devices on Span nare
trying to establish contact with each other on
Loop 1 or Loop 2, where nis the number of the
span.
ACO Alarm CutOff A system alarm has occurred, and has been
retired to an ACO condition by pressing the SEL
button on the HLU front panel.
SELF TEST Self Test The HLU is in a self-test mode. This occurs every
power On/Off cycle.
ALRM Alarm Condition
Exists A minor alarm condition is in effect.
PWRF SHRT Power Feed Short Indicates a short between the two HDSL pairs.
ThissamemessagecanoccurwithanHRUthatis
drawing the correct amount of power over good
cable pairs but cannot communicate with the
HLU.
PWR FEED
OPEN Power Feed Open IndicatesanopencircuitintheT/RofeitherHDSL pair in Span 1.

Troubleshooting 350-200-111-02, Issue 2
16 October 4, 1999 HLU-200 List 1A
SF Super Frame Indicates the T1 input to the AHT1U in a
superframe format, if the FRMC option is set to
AUTO.
ESF Extended Super Frame Indicates the T1 input to the AHT1U in an
extended superframe format, if the FRMC option
is set to AUTO.
PWRF OFF Power Feed Off HDSL span power has been turned off by setting
thePWFDoptiontoDIS,orHDSL spanpowerhas
been turned off by use of the A1LB/A2LB/A5LB
Intelligent Office Repeater (IOR) Power Down
code.
BAD RT? No response from HRU The HLU does not receive any response from the
HRU. The integrity ofthe HRU or the two HDSL
loops (they may be open) is questionable.
VER xxxx HLU-200 Version
Number The software version number (xxxx) appears during the System Settings review mode. Press
the MODE button for 3 seconds to display the
software version.
LIST 0xL HLUs List No. Displayed during System Settings review mode
defined above.
FRM Frame: SF, ESF, UNFR,
NONE Defines the type of frame pattern being received from the DSX-1: SuperFrame (SF), Extended
SuperFrame (ESF), Unframed (UNFR), or NONE.
Displayed during System Settings review mode.
Table 5. Four-Character Diagnostic Messages (Cont.)
Message Full Name Description