PairGain HIGAIN HRU-412 User manual

HIGAIN REMOTE UNIT
PAIRGAIN TECHNOLOGIES, INC.
ENGINEERING SERVICES TECHNICAL PRACTICE
SECTION 150-412-107-03
Model List Number Part Number CLEI Code
HRU-412 7 150-1103-07 T1LIEV04

150-412-107-03, Revision 03
ii November 19, 1999 HRU-412 List 7
Revision History of This Practice
© Copyright 1999 PairGain Technologies, Inc.
PairGain and HiGain are registered trademarks of PairGain Technologies, Inc. Other
product namesmentionedin this practice are usedfor identification purposes onlyandmay
be trademarks or registered trademarks of their respective companies.
Information containedin this documentis 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.
Information furnished by PairGain Technologies is believed to be accurate and reliable.
However, no responsibility is assumed by PairGain Technologies for its use; nor for any
infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of PairGain
Technologies. PairGain Technologies reserves the right to change specifications at any
time without notice.
Revision Release Date Revisions Made
01 November 18, 1994 Initial Release
02 April 30, 1998 Update
03 November 19, 1999 Correct line powering specifications and update
wiring diagram

150-412-107-03, Revision 03 Using This Technical Practice
HRU-412 List 7 November 19, 1999 iii
USING THIS TECHNICAL PRACTICE
Two types of messages, identified by icons, appear in the text.
DOCUMENTATION
If you have comments on this PairGain document, send an email to
[email protected]m. Type the product name and the
section number of the document in the subject area of the email message.
INSPECTING THE SHIPMENT
Upon receipt of the equipment:
•Unpack each container and inspect the contents for signs of damage. If
theequipmenthasbeen damagedin transit, immediatelyreport 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
describedin the Warrantylocatedinsidethebackcover.Ifyoumuststore
the equipment for a prolonged period, store the equipment in its original
container.
Notes contain information about special circumstances.
Caution symbols indicate the possibility of equipment
damage or the possibility of personal injury.
The Electrostatic Discharge (ESD) Susceptibility symbol
indicates that a device or assembly is susceptible to damage
from electrostatic discharge.

Inspecting the Shipment 150-412-107-03, Revision 03
iv November 19, 1999 HRU-412 List 7

150-412-107-03, Revision 03 Table of Contents
HRU-412 List 7 November 19, 1999 v
TABLE OF CONTENTS
Overview _______________________________________________ 1
Applications ____________________________________________ 2
Front and Rear Panel_____________________________________ 3
Installation _____________________________________________ 9
Local Powering...................................................................... 10
Installation Test...................................................................... 10
Remote Login __________________________________________ 11
Connecting to a Maintenance Terminal................................. 11
Logging On and Off............................................................... 13
Remote Terminal Main Menu................................................ 14
Loopbacks _____________________________________________ 15
Appendix A - Specifications_______________________________ 18
Pinouts.................................................................................... 19
Craft Port................................................................................ 20
Insertion Loss......................................................................... 21
Appendix B - Functional Description_______________________ 22
Operational Capabilities......................................................... 22
Local and Line Powering....................................................... 23
Appendix C - Product Support____________________________ 25
Technical Support.................................................................. 25
World Wide Web................................................................... 25
Returns................................................................................... 26
Appendix D - Glossary___________________________________ 28
Certification and Warranty__________________Inside Back Cover

List of Figures 150-412-107-03, Revision 03
vi November 19, 1999 HRU-412 List 7
LIST OF FIGURES
1.HRU-412 List 7 Front Panel...................................................................3
2.HRU-412 List 7 Back Panel ...................................................................7
3.Connecting to a Maintenance Terminal................................................11
4.HRU-412 List 7 Loopbacks..................................................................15
5.HRU-412 List 7 Pinouts .......................................................................19
6.Craft Port Wiring..................................................................................20
7.HRU-412 List 7 Block Diagram...........................................................23
LIST OF TABLES
1.HRU-412 List 7 Front Panel Components..............................................4
2.Rear Panel Components..........................................................................8
3.Remote Terminal Main Menu Items.....................................................14
4.HDSL Loss Over Cables.......................................................................21

150-412-107-03, Revision 03 Overview
HRU-412 List 7 November 19, 1999 1
OVERVIEW
The PairGain®HiGain®Remote Unit Model HRU-412 List 7 is the remote
end of a repeaterless T1 transmission system. An HRU-412 List 7 connects
to a HiGain Line Unit (HLU-231, HLU-232, HLU-319, or HLU-388),
creating a HiGain system which provides 1.544 Mbps transmission on two
unconditioned copper pairs over the full Carrier Serving Area (CSA) range.
The CSA encompasses approximately 12,000 feet (3658 m) of AWG 24 wire
or 9,000 feet (2743 m) of AWG 26 wire, including bridge taps and gauge
changes. A HiGain system utilizes 2B1Q High-bit-rate Digital Subscriber
Line (HDSL) transmission technology.
The HRU-412 List 7 features:
•Customer Interface (CI)
•Front-panel DS1 and HDSL LEDs
•Front-panel loopback button
•Signature resistance on DS1 and HDSL ports
•Generic and addressable repeater Loopback activation codes
•Metallic SmartJack loopback (conforms to TR-TSY-000312)
•Provisioning switches for customer premise equipment (CPE) current,
receive (RCV) level, and transmit loss of signal (TLOS) initiated
loopback or alarm
•Line or local power options
•Sealing current
•Front panel jacks for test access
•Craft port
•CPE current monitoring test points
•Front panel HDSL margin threshold indicator for each loop
•Lightning and power cross protection on HDSL and DS1 interfaces
•784 Kbps full-duplex 2B1Q HDSL transmission on two pairs
•DS0 blocking support

Applications 150-412-107-03, Revision 03
2 November 19, 1999 HRU-412 List 7
The HRU-412 List 7 can be line powered or locally powered with a metallic
sealing current option. The input resistive signature is 180 k
 at each HDSL
port.
APPLICATIONS
A HiGain system, consisting of a HiGain line unit and a HiGain remote unit,
provides a quick and cost-effective way of delivering T1 High Capacity
Digital Service (HCDS) to customers over copper pairs. The HiGain system
can be deployed on two unconditioned, non-loaded copper pairs without
repeaters, and without the need for bridged tap removal or binder group
separation.
A HiGain system operates with a variety of other T1, POTS, Digital Data
Service (DDS) equipment or other HiGain systems sharing the same cable
binder group. HiGain systems provide temporary or permanent DS1 service
and can provide a means of deploying service in advance of fiber optic
transmission systems.

150-412-107-03, Revision 03 Front and Rear Panel
HRU-412 List 7 November 19, 1999 3
FRONT AND REAR PANEL
Figure 1 shows the front panel of the HRU-412 List 7. Table 1 on page 4
describes its components.
Figure 1. HRU-412 List 7 Front Panel

Front and Rear Panel 150-412-107-03, Revision 03
4 November 19, 1999 HRU-412 List 7
Table 1. HRU-412 List 7 Front Panel Components
Name Function
Test points Allow the 60 mA CPE current option to be measured. The current flowing
is related to the voltage measured across the + and - test points by the
following relationship: CPE CURRENT = 1 mA/1 mV. Typical readings
range from 55 to 65 mV, which equate to a 55 to 65 mA current range.
Receive
(RCV) and
transmit
(XMT) jacks
Provide splitting and monitor access to the CPE DS1 interface. The jacks
are isolated from the CPE DS1 metallic interface by a transformer.
Alarm LEDs The REM LOS LED is steady red indicating a loss of signal (LOS) at the T1
input to the HLU. This LOS condition causes the HRU-412 to transmit the
alarm indicating signal (AIS) pattern toward the CPE.
The LOC LOS LED is steady red indicating a loss of signal at the T1 input
to the HRU-412. This LOS condition transmits the AIS pattern toward the
DSX-1 (TLOS Disabled) or to execute a logic loopback in the HRU-412
(TLOS Enabled).
Loopback
(LB) LEDs
The LB NET LED is steady green indicating the HRU-412 is in a loopback
state where the signal from the network is looping back to the network.
The LB CIS LED is steady yellow indicating the HRU-412 is in a loopback
state in which the signal from the customer interface (CI) is looping back
to the CI.
Code LEDs The B8ZS LED is steady green indicating that the user DS1 code option is
set to B8ZS.
The AMI LED is steady yellow indicating that the user DS1 code option is
set to AMI.
The BPV LED is steady red indicating that the user DS1 code option is set
to BPV.
If the user DS1 code option is set to AUTO, the LED light indicates what
DS1 signal is being received.These settings are made on the HLU.
Framing
LEDs
The ESF LED is steady green indicating that the framing pattern of the
received signal is Extended Super Frame (ESF).
The SF LED is steady yellow indicating that the framing pattern of the
received signal is Super Frame (SF).
The ERR LED is steady red indicating that a DS1 frame error has occurred.
No frame LED lights when the HRU-412 input pattern is unframed or when
the framing option is set to UNFR (unframed). These settings are made on
the HLU.