PairGain HiGain Line Unit HLU-388 User manual

HIGAIN LINE UNIT
QUICK INSTALLATION GUIDE
PAIRGAIN TECHNOLOGIES, INC.
ENGINEERING SERVICES TECHNICAL PRACTICE
™350-388-125-01x¨
SECTION 350-388-125-01
Model List Number Part Number CLEI Code
HLU-388 2E 150-1141-25 T1L2BBYAAA
MODE SEL
M
A
R
G
I
N
(dB)
SETUP
STATUS
RS
232
HLU 388
HG HDIAIN
L2E

350-388-125-01, Revision 01
ii June 30, 1998 HLU-388 List 2E
Revision History of This Practice
Copyright ©1998 PairGain Technologies, Inc.
PairGain and HiGain are registered trademarks of PairGain Technologies, Inc.
Information contained in this document is company private to PairGain Technologies, Inc.
and shall not be modified, used, copied, reproduced or disclosed in whole or in part without
the written consent of PairGain.
Other product names mentioned in this practice are used for identification purposes only
and may be trademarks or registered trademarks of their respective companies.
Revision Release Date Revisions Made
01 June 30, 1998 Initial Release

350-388-125-01, Revision 01
HLU-388 List 2E June 30, 1998 iii
USING THIS MANUAL
Two types of messages, identified by icons, appear in the text.
INSPECTING SHIPMENT
Upon receipt of the equipment:
•Unpack each container and visually inspect it forsigns of damage. If the
equipment has been damaged in transit, immediately report the extent of
damage to the transportation company and to PairGain. Order
replacement equipment, if necessary.
•Check the packing list to ensure complete and accurate shipment of each
listed item. If the shipment is short or irregular, contact PairGain as
described in the Warranty. 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 the
possibility of personal injury.

350-388-125-01, Revision 01
iv June 30, 1998 HLU-388 List 2E
ABBREVIATIONS
AMI Alternate Mark Inversion
B8ZS Bipolar with 8 Zero Substitution
CO Central Office
CSA Carrier Service Area
ES Errored Seconds
ESF Extended Superframe
HDSL High-bit-rate Digital Subscriber Line
HDU HiGain Doubler Unit
HLU HiGain Line Unit
HRU HiGain Remote Unit
NVRAM Non-Volatile Random Access Memory
SF Super Frame
ZBTSI Zero Byte Time Slot Interface

350-388-125-01, Revision 01
HLU-388 List 2E June 30, 1998 v
TABLE OF CONTENTS
Product Overview________________________________________ 1
HLU-388 Features ................................................................... 1
Compatibility ........................................................................... 2
Front Panel...............................................................................3
Front Panel Messages ..............................................................5
Card-Edge Connector............................................................... 9
Installation ____________________________________________ 10
HDSL Line Voltage _____________________________________ 11
Provisioning ___________________________________________ 12
Using the Front Panel Buttons............................................... 12
Restoring Default Settings..................................................... 13
Using the Maintenance Terminal Menus............................... 14
Connecting to the Craft Port.................................... 14
Navigating the Maintenance Terminal Menus ........ 15
Selecting an Option ................................................. 15
System Options Settings.......................................... 16
Alarms ________________________________________________ 20
Loopbacks _____________________________________________ 22
Specifications __________________________________________ 23
Product Support________________________________________ 25
Related Documentation.......................................................... 25
Technical Support.................................................................. 25
Warranty ................................................................................ 26
FCC Compliance _______________________________________ 27
Modifications __________________________________________ 27
Standards Compliance___________________________________ 28

350-388-125-01, Revision 01
vi June 30, 1998 HLU-388 List 2E

350-388-125-01, Revision 01 Product Overview
HLU-388 List 2E June 30, 1998 1
PRODUCT OVERVIEW
The PairGain®HiGain®HLU-388 List 2E is the Central Office (CO) side of
a repeaterless, T1 transmission system. When used in conjunction with a
HiGainRemoteUnit(HRU)thesystemprovides1.544Mbpstransmissionon
two unconditioned copper pairs over the full Carrier Service Area (CSA)
range. This line unit can be used in applications with or without HiGain
doubler units (HDUs).
The CSA includes loops up to 12,000 feet of 24 AWG or 9,000 feet of
26 AWG wire, including bridged taps. The HiGain system uses HDSL
transmission technology as recommended by Bellcore TA-TSY-001210.The
HiGain system complies with TR-TSY-000063 (Network Equipment
Building System (NEBS) Generic Equipment Requirements) and
TR-TSY-000499 (Transport System Generic Requirements (TSGR)
Common Requirements).
HLU-388 FEATURES
•Selectable DS1 pre-equalizer
•130 to 200 Vdc HDSL line power for HDU and HRU
•Front panel HDSL Signal-to-Noise margin display
•Compatible with high-density DDM+shelves
•Selectable loopback activation codes
•RS-232 Craft port for connection to a maintenance terminal
•Compatible with PairGain Management System
•Ground fault detect circuit
•Front panel operator setup
•Lightning and power cross protection on HDSL interfaces
•Full duplex 2B1Q HDSL transmission at 784 kbps on two wire pairs
•Front panel status LED
•On/off power cycling from front panel
•DS1 Loss Of Signal (LOS) detector (125 consecutive 0s)

Product Overview 350-388-125-01, Revision 01
2 June 30, 1998 HLU-388 List 2E
•Margin threshold alarm
•HDSL Alarm Indicator Signal (AIS) and SmartJack AIS options
•Easily restored factory default settings
•Circuit ID option
COMPATIBILITY
The HLU-388 List 2E is compatible with the following T1 repeater shelves
and associated equipment:
•Shelf (23-inch)
–Larus FT2 1188 (28-slot, connectorized)
–AT&T DS1 Ext. (28-slot, connectorized)
•Shelf (19-inch)
–Larus FT21187 (20-slot, connectorized)
•Cabinet Distant Terminal (23-inch)
–Larus FT2 1190 (12 slots) for a 51A cabinet.

350-388-125-01, Revision 01 Product Overview
HLU-388 List 2E June 30, 1998 3
FRONT PANEL
Figure 1 shows the HLU-388 front panel. Table 1 describes the front panel
components.
Figure 1. The HLU-388 Front Panel
Front panel display
List number
Craft port
System option buttons
Status LED
Configuration number
CLEI/ECI bar code
label
M
A
R
G
I
N
(dB)
HLU-388
HiGain HD
L
RS
232
STATUS
SETUP
MODE SEL
PAIRGAIN

Product Overview 350-388-125-01, Revision 01
4 June 30, 1998 HLU-388 List 2E
Table 1. Front Panel Components and Labels
Front Panel Feature Function
Front panel display Displays four-character status, provisioning, and alarm
system messages.
System option buttons
(MODE and SEL)
Permits the user options to be monitored and modified
without the need of a maintenance terminal. Used to initiate
all HiGain loopbacks and to display DSX-1 line parameters
and line unit identity.
Status LED See Table 2 for status descriptions.
Craft (RS-232) port Bantam 210 jack provides bidirectional communication
between the unit and an external terminal to allow
configuration and performance monitoring through the
Maintenance Terminal menus.
CLEI/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 The configuration number is a two or three-digit number
that is either the last digits of a five or six-digit warranty
control number or a standalone configuration number of
two or three digits. For example, a number of “80107”
would indicate a warranty beginning in the year 1998 (8),
during the month of January (01), and the unit’s
configuration number of 7 (07).