PairGain HiGain HRE-450 User manual

HIGAIN REMOTE ENCLOSURE
PAIRGAIN TECHNOLOGIES, INC.
ENGINEERING SERVICES TECHNICAL PRACTICE
™150-450-105-02+¨
SECTION 150-450-105-02
Model List Number Part Number CLEI Code
HRE-450 5 150-1121-05 T1RHCAS4RD

150-450-105-02, Revision 02
ii November 4, 1998 HRE-450 List 5
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 privateto PairGainTechnologies, Inc.,and shallnot 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
02 November 4, 1998 CLEI Code update

150-450-105-02, Revision 02 Using This Technical Practice
HRE-450 List 5 November 4, 1998 iii
USING THIS TECHNICAL PRACTICE
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 for signs 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.

Inspecting Shipment 150-450-105-02, Revision 02
iv November 4, 1998 HRE-450 List 5

150-450-105-02, Revision 02 Table of Contents
HRE-450 List 5 November 4, 1998 v
TABLE OF CONTENTS
Overview ____________________________________________________________________________ 1
Features..............................................................................................................................................1
Applications .......................................................................................................................................1
Description __________________________________________________________________________ 3
HRE-450 List 5 Components.............................................................................................................3
Compatibility .....................................................................................................................................4
Installation___________________________________________________________________________ 5
Installation Kit....................................................................................................................................5
Locating the Necessary Tools............................................................................................................5
Installing the HRE-450 ......................................................................................................................6
Wiring the HRE-450..........................................................................................................................7
Installing a Doubler or Remote Unit................................................................................................11
Appendix A - Specifications____________________________________________________________ 12
Appendix B - Product Support _________________________________________________________ 13
Technical Support............................................................................................................................13
Warranty...........................................................................................................................................13

Table of Contents 150-450-105-02, Revision 02
vi November 4, 1998 HRE-450 List 5

150-450-105-02, Revision 02 Overview
HRE-450 List 5 November 4, 1998 1
OVERVIEW
This technical practice describes the PairGain®HiGain®Remote Enclosure Model HRE-450 List 5. The HRE-450
is one component of the HiGain T1 transmission system, which transmits data at up to 1.544 Mbps on two
unconditioned copper pairs over the full Carrier Service Area (CSA) range. A HiGain system consists of a line
unit and a remote unit, and may include up to four doublers to extend the transmission distance.
This HRE-450 List 5 is a dual stub, weatherproof enclosure that houses either one single-slot HiGain Remote Unit
(HRU) or one HiGain Doubler Unit (HDU). The HRE-450 is designed to be mounted outdoors on any suitable
above-ground surface, such as a concrete wall or wood telephone pole. The HRE-450 cannot be pressurized, and
therefore cannot be installed in an underground location.
FEATURES
•Compact design
•Easily mounted on a wall or pole using supplied screws
•Front cover opens easily, which enables quick inspection or service of enclosed unit
•Uses weather-sealing cable fittings that protect connections and provide strain relief
•Protects remote or line unit against adverse weather conditions and harmful contaminants
•Uses Quiet-Front Connector Modules (QFCMs) to provide electrical surge protection and corrosion-resistant
wire
APPLICATIONS
The HRE-450 List 5 enclosure is primarily intended for housing a PairGain HRU-411 remote unit when used in
Personal Access Communication Systems (PACS) application. A typical PACS circuit is shown in Figure 1 on
page 2. The figure shows the wire connections from the stub. Stub 1 contains the two network HDSL pairs
(White/Orange and White/Slate) that connect the HRU-411 to the upstream HiGain module (HLU or HDU).
Stub 2 contains the two DS1 pairs(White/Blue and Red/Blue) and the power pair (White/Brown). The power pair
connects the HRU-411 special 60 to 130 V, 8.5W power supply to an external PACS remote 200 mWradio station
such as the NEC radio port. Only the HLU-231 List 8x, HLU-319 List 5x and HLU-388 List 5x line units and the
HDU-409 doubler can be used with the HRU-411 in PACS applications.

Applications 150-450-105-02, Revision 02
2 November 4, 1998 HRE-450 List 5
Figure 1. HRU-411 PACS Application Interface
HDSL Loops
Full CSA Range
WHT/ORG
Loop 1 Loop 1 ORG/WHT
WHT/SLT
WHT/BLU
BLU/WHT
RED/BLU
DS1
R
T
T1
R1
BLU/RED
SLT/WHT
Stub 1 Stub 2
Power
WHT/BRN
BRN/WHT
Loop 2 Loop 2
Span 1 Span 1
-V +V
54 50
HDSL
65 to 130V
power supply
8.5 watts
HRE-450, L5
HRU-411, L1
HLU-231, L8x
HLU-319, L5x
HLU-388, L5x
HDU-409
Doubler
PACS
Radio
Port
-
+
TT TT
RR RR
DSX-1
R1 R1 R1 R1
T1 T1 T1 T1
48V

150-450-105-02, Revision 02 Description
HRE-450 List 5 November 4, 1998 3
DESCRIPTION
This section describes the components and compatibility of the HRE-450.
HRE-450 LIST 5 COMPONENTS
The HRE-450 is a weather-resistant, non-pressurized white-rectangular enclosure with a removable front lid. It
can house one unit with either 400 or SLIM mechanics. SLIM mechanics plugs are half the width of the
400 mechanics. Figure 2 and Table 1 on page 4 identify the HRE-450 components.
Figure 2. HRE-450 Components
Mounting bracket
Mounting screw hole
Mounting screw hole
Cable lock nut
3/8 in. padlock
shackle holes
Cable rifting Cable rifting
Cable stubs
Quiet-front
connector
modules (4)
Air vent/
breather cap
56-pin
card edge
connector
Ground
wire access
Ground wire
connector
Wiring diagram
on back of cover
Card guide
Card guide

Compatibility 150-450-105-02, Revision 02
4 November 4, 1998 HRE-450 List 5
COMPATIBILITY
The HRE-450 is compatible with all PairGain HiGain HRU and ERU remote units and HDU-451 and EDU-451
units.
Table 1. HRE-450 Components
Component Function
Locking tab Secures the unit to the connector.
Mounting screw guides Indicate where to drill the mounting screw holes.
Mounting bracket Secures the remote unit or doubler in the enclosure.
Wiring diagram label Provides installation wiring diagram for both DS1 and HDSL interfaces.
56-pin card edge connector Provides card edge connectivity for the installed remote or doubler unit.
Card guides Guides and aligns card with card-edge connector during card insertion.
Quiet-Front Connector Modules Primary surge protection to all four ports.
Ground wire connector Used to attach the grounding wire.
Ground wire access Access hole for insertion of ground wire lug.
Air vent/breather cap Permits air circulation and keeps internal atmosphere free of harmful contaminants.
3/8 in. padlock shackle holes Used to attach a padlock for security.
Cable stubs Provide access for HDSL, DS1 and power wires.
Compression connector nuts Creates a nearly air-tight fit to inhibit water and other contaminants.
Cable rifting Protects excessive bending of stub at entrance point.

150-450-105-02, Revision 02 Installation
HRE-450 List 5 November 4, 1998 5
INSTALLATION
This section describes the tools and procedures for installing the HRE-450.
INSTALLATION KIT
The HRE-450 installation kit components are listed in Table 2. If any of the above items are missing, or the
shipment is damaged, please contatct your PairGain sales representative.
LOCATING THE NECESSARY TOOLS
To install the HRE-450, you need the following tools:
•blade screwdriver
•drill
•wood/metal or concrete drill bit, depending on installation surface
•hammer
•Type 216C (7/16 in.) wrench
Table 2. Installation Kit
Quantity Description
1HiGain Remote Enclosure (HRE) 500 Technical Practice, Section 150-450-100
2three wood screws (#10 x 1.5 inch)
1three anchor nuts (#10 x 1 inch)
2three flat washers (#10 CPS/ZPS)
2one cable tie (5.5 inch length, 0.15 inch width)

Installing the HRE-450 150-450-105-02, Revision 02
6 November 4, 1998 HRE-450 List 5
INSTALLING THE HRE-450
Install the HRE-450 onto a concrete or wood surface, such as a wall or telephone pole, using the hardware
provided in the Installation Kit. The HRE-450 must be installed above ground, in a location that provides access
to wiring and grounding connections. To install the unit:
1Using a 3/8 inch can wrench, or an adjustable wrench, loosen the cover screw on the HRE-450, then remove
the cover.
Figure 3. Locating the HRE-450 Cover Screw
2The two compression connector nuts must be secure to seal the unit from water damage. If a fitting is not
secure, tighten it using your fingers.
To locate the two compression connector nuts, see Figure 2 on page 3.
3Place the HRE-450 in the selected installation location, then mark the mounting screw hole locations on the
installation surface, using the mounting screw guides.
The HRE-450must always be mounted vertically with the stubs pointing down. This prevents
wind-driven rain and running water from entering the enclosure. Horizontal installations
should never be used.

150-450-105-02, Revision 02 Installation
HRE-450 List 5 November 4, 1998 7
4Do one of the following:
•If the installation location is wood, use a drill with a wood or metal drill bit to drill the mounting screw
holes into the wooden surface.
•If the installation location is concrete, use a drill with a concrete drill bit that is slightly smaller than the
diameter of the anchor nuts to drill the mounting screw holes into the concrete surface.
5Insert the two anchor nuts into the mounting holes and tap the anchor nuts into place with a hammer.
6While holding the HRE-450 in place, place a washer over one of the mounting-screw holes, then use a #2
screwdriver to screw one of the provided screws into the mounting hole.
7While holding the HRE-450 in place, place a washer over the other mounting-screw hole then use a #2
screwdriver to screw one of the provided screws into the mounting hole.
WIRING THE HRE-450
The HRE-450 List 5 has two 20-foot air-filled stubs. Each stub is a 6-pair, 24 AWG plastic-insulated, single-
jacketed, air core cable intended for aerial (above ground) applications. Conductors are insulated with solid high-
density polyethylene. Standard color codes are used for pair identification with color compounds chosen for
electrical balance and permanency. A non-hygroscopic core wrap protects the core and provides improved
mechanical electrical characteristics. The cable core shield is a corrugated copolymer coated 8 mil aluminum tape.
The outer jacket consists of a black, low-density polyethylene material that provides a flexible protective covering
that withstands exposure to sunlight, atmospheric temperatures, ground chemicals and stresses expected in
standard installations. The cable complies with the requirements of ANSI/ICEA S-85-625-1989 and REA PE-22.
The outside diameter of the cable is 0.36 inches (9 mm).
Figure 4 shows the identity of the five ports to which each cable stub provides access. The CO ports are restricted
to the CO HDSL cable pair connections that connect the HRE-450 to either a doubler or a line unit. The field pairs
connect to the DS1 interfaces for remote unit applications.
Figure 4. HRE-450 Wiring Diagram
The HRU-411 edge connector (inner set of pins) and the mating HRE-450 edge connector
(outer set of pins) have different reference designations for the same pins.
HRE-450 L
FIELDC.O.
7
1
1
54
27
-PS
50
25
+
5CD
13 15 JH41 55 EY47
WHT ORN
HDSL IN 1 HDSL IN 2 DS1 - RCV DS1 - XMT 130V
SLT BLU RED BLUWHT WHT WHT BRN
49 CB
STUB 1 STUB 2
TT1RR1 TT1 RR1

Wiring the HRE-450 150-450-105-02, Revision 02
8 November 4, 1998 HRE-450 List 5
Connect the HRE-450 to the signal cables and ground wire:
1Loosen the compression connector nuts on the bottom of the HRE-450 using one of the following methods:
•Using your hand, turn the compression connector nuts counterclockwise.
•If the compression connector nuts are too tight to loosen by hand, use groove-joint pliers to hold each
cable fitting center locknut, then use groove-joint pliers to turn each compression nut counterclockwise.
Figure 5. Bottom View of the HRE-450
2Feed solid ground wire, up to #6 AWG, through the HRE-450 GND cable fitting.
3Strip approximately 1/2 inch of insulation from the end of the ground wire.
4Insert the stripped wire into the ground wire access, then tighten the ground wire connector.
5Using your fingers, tighten the ground wire connector.
6Remove the compression connector nut from the cable stub fitting.
7Insert approximately 6 inches of interface telephone cable through the exposed cable stub fitting hub.
8Slit the ends of the leads of each drop-wire pair and bend as shown in Figure 6.
Mounting bracket Cable stubGround wire access
Compression connector nuts
Cable stub
Air vent/breather cap

150-450-105-02, Revision 02 Installation
HRE-450 List 5 November 4, 1998 9
Figure 6. Preparing the Wire Pair for Insertion into the Quiet-Front Connector Modules
9Use a Type 216C (7/16 inch) wrench to rotate each QFCM lug 1/4 turn counterclockwise to open the
connectors.
Figure 7. Locating the QFCM Connecting Lug
10 Insert the first pair’s Tip and Ring wires into the Wire-Entry holes in the first QFCM, until the wires touch
the ends of the transparent plastic caps.
Do not strip the drop-wire pair insulation.
Do not rotate the QFCM lug more than 1/4 turn or you will cut the wire.

Wiring the HRE-450 150-450-105-02, Revision 02
10 November 4, 1998 HRE-450 List 5
11 While holding the Tip and Ring wires in place with your fingers, use a Type 216C (7/16 inch) wrench to rotate
each QFCM lug 1/4 turn clockwise.
12 Using your fingers (do not use pliers or a wrench), tighten the cable rifting compression nut.
If necessary, use groove-joint pliers to hold each cable rifting center locknut while tightening each
compression nut with your fingers.
13 Use cable ties to dress the wires that enter the enclosure box and connect to the QFCM terminals, per local
practice.
14 Position and secure the ground wire along the installation surface and connect it to a nearby ground, per local
practice.
Do not rotate the QFCM lug more than 1/4 turn or you will cut the wire.

150-450-105-02, Revision 02 Installation
HRE-450 List 5 November 4, 1998 11
INSTALLING ADOUBLER OR REMOTE UNIT
To install a doubler or remote unit in the HRE-450:
1Slide the doubler or remote unit into the slot until firmly seated.
2Connect the locking table to the unit to secure the unit to the enclosure.
Figure 8. Installing a Remote or Doubler Unit in an HRE-450
3Verify that the unit completes its initial power-on cycle and that both front-panel HDSL LEDs light green.
4Install the HRE-450 cover and use a torque wrench to tighten the screw to approximately 6 to 8 inch/pounds
(maximum) torque to secure.

Installing a Doubler or Remote Unit 150-450-105-02, Revision 02
12 November 4, 1998 HRE-450 List 5
APPENDIX A - SPECIFICATIONS
This appendix describes the HRE-450 technical specifications.
Physical
Material Steel
Finish Zinc plated
Mounting Wood, wall or pole
Enclosure Box
Height 9.31 inch (23.65 cm)
Width 7.31 inch (18.57 cm)
Depth 2.31 inch (5.87 cm)
Enclosure Lid
Height 10.25 inch (26 cm)
Width 7.5 inch (19.1 cm)
Depth 2.69 inch (6.83 cm)
Quiet Front Connector Modules (QFCM)
Electrical Protection Each QFCM module contains a 60 A, three-element, gas-tube surge
protectorwitha 265-600VDCbreakdownvoltageatbreakdownrate
of 2000 V/second
Specification compliance PB 80 Heavy Duty, Bellcore TP-TS-1-000073, GTS 8376, UL 497
Environmental
Operating Temperature - 40 C to + 65 C (40°F to 149°F)
Operating Humidity 5 to 95% non-condensing

150-450-105-02, Revision 02 Appendix B - Product Support
HRE-450 List 5 November 4, 1998 13
APPENDIX B - PRODUCT SUPPORT
This section contains product support and warranty information.
TECHNICAL SUPPORT
PairGain Technical Assistance is available 24 hours a day, 7 days a week by contacting PairGain Customer
Service Engineering group at:
During normal business hours (8:00 AM to 5:00 PM, Pacific Time, Monday throughFriday, excluding holidays),
technical assistance calls are normally answered directly by a Customer Service Engineer. At other times, a
request for technical assistance is handled by an on-duty Customer Service Engineer through a callback process.
This process normally results in a callback within 30 minutes of initiating the request.
In addition, PairGain maintains a computer bulletin board system for obtaining current information on PairGain
products, product troubleshooting tips and aids, accessing helpful utilities, and for posting requests or questions.
This system is available 24 hours a day by calling [phone]. Transmission speeds up to 28.8 kbps are
supported with a character format of 8-N-1.
WARRANTY
PairGain Technologies warrants this product to be free of defects and to be fully functional for a period of 60
months from the date of original shipment, given correct customer installation and regular maintenance. PairGain
will repair or replace any unit without cost during this period if the unit is found to be defective for any reason
other than abuse or incorrect use or installation.
Do not try to repair the unit. If it fails, replace it with another unit and return the faulty unit to PairGain for repair.
Any modifications of the unit by anyone other than an authorized PairGain representative voids the warranty.
If a unit needs repair, call PairGain for a Return Material Authorization (RMA) number and return the defective
unit, freight prepaid, along with a brief description of the problem, to:
PairGain Technologies, Inc.
14352 Franklin Avenue
Tustin, CA 92780
ATTN: Repair and Return Dept.
[phone]
PairGain continues to repair faulty modules beyond the warranty program at a nominal charge. Contact your
PairGain sales representative for details and pricing.
Telephone: [phone] or [phone]
Fax: [phone]

Corporate Office
14402 Franklin Avenue
Tustin, CA 92780
Tel: [phone]
Fax: [phone]
For Technical Assistance:
[phone]