CopperOptics PairGain PG-Flex FRE-765 List 5 User manual

PG-FLEX REMOTE TERMINAL ENCLOSURE
MODEL FRE-765 LIST 4X
PAIRGAIN TECHNOLOGIES, INC.
ENGINEERING SERVICES TECHNICAL PRACTICE
SECTION 363-765-104-04
Revision History of This Practice
Revision 04—February 19, 1998
A) Initial Release
List Number Part Number CLEI Code
4 150-1365-04 VAMRBM0ARA
4A 150-1365-41 VAMRBN0ARA
4B 150-1365-42 VAMRBP0ARA
4D 150-1365-44 VAMRBR0ARA
4E 150-1365-45 VAMRBS0ARA
4F 150-1365-46 N/A
4G 150-1365-47 VAMRBT0ARA
4H 150-1365-48 VAMRBU0ARA

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©Copyright 1998 PairGain Technologies, Inc.
PairGain is a registered trademark, and PG-Flex is a trademark of PairGain Technologies, Inc.
Information contained in 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.
Other product names mentioned in this practice are used for identification purposes only and may be trademarks or registered
trademarks of their respective companies.

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Table of CONTENTS
PRODUCT OVERVIEW.................................................................................................................................1
Description and Features....................................................................................................................1
Specifications.....................................................................................................................................7
FUNCTIONAL DESCRIPTION......................................................................................................................8
Operational Capabilities.....................................................................................................................8
Backplane Connections......................................................................................................................9
INSTALLATION AND TEST.......................................................................................................................13
Unpacking........................................................................................................................................13
Installation Requirements ................................................................................................................14
Mounting..........................................................................................................................................14
Wiring ..............................................................................................................................................16
Turn-Up and Testing........................................................................................................................30
Troubleshooting...............................................................................................................................30
TECHNICAL SUPPORT...............................................................................................................................30
WARRANTY AND CERTIFICATION........................................................................................................31
Warranty...........................................................................................................................................31
Certification .....................................................................................................................................31
ABBREVIATIONS........................................................................................................................................33
Using This Technical Practice
Two types of messages, identified by icons, appear in the text.
These messages indicate special circumstances.
!These messages indicate the possibility of either personal injury or equipment damage.

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PRODUCT OVERVIEW
Description and Features
The PairGain®PG-Flex©FRE-765 List 4xRemote Terminal (RT) Enclosures (see Figure 1 through Figure 7)
provide convenient mounting of one RT Line Unit and up to three Channel Units, supporting up to 24 channels.
The enclosures provide termination points for subscriber circuits, power, and metallic bypass pair. Terminations,
with internal gas tube protectors, are provided on the backplane for High bit-rate Digital Subscriber Line (HDSL)
and Bypass connections. Terminations may be added for auxiliary power pairs when PG-Flex is used with a
PG-Flex doubler. The enclosure can be pole or wall mounted and is environmentally sealed for outside plant
installations. Listed below are the FRE-765 enclosures described in this practice:
•List 4—see Figure 1 on page 2
•List 4A—see Figure 2 on page 2
•List 4B—see Figure 3 on page 3
•List 4D and 4E—see Figure 4 on page 3
•List 4F—see Figure 5 on page 4
•List 4G—see Figure 6 on page 4
•List 4H—see Figure 7 on page 5
PG-Flex HDSL, Auxiliary Power, and Bypass Pair circuits must be protected with
3-mil carbon blocks, or equivalent. Subscriber circuits must also be protected with
3-mil carbon blocks, or equivalent, when these circuits are exposed to the outside
plant.
Use the List 4 x RT Enclosures only with the FCS-718 List 2 or higher, or the FCS-719
List 2 or higher COT Shelves.

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Figure 1. FRE-765 List 4 RT Enclosure (Interior View)
Figure 2. FRE-765 List 4A RT Enclosure (Interior View)

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Figure 3. FRE-765 List 4B RT Enclosure (Interior View)
Figure 4. FRE-765 List 4D and 4E RT Enclosure (Interior View)

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Figure 5. FRE-765 List 4F RT Enclosure (Interior View)
Figure 6. FRE-765 List 4G RT Enclosure (Interior View)

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Figure 7. FRE-765 List 4H RT Enclosure (Interior View)
Features of the FRE-765 List 4xRT Enclosure include:
•pole or wall mounting
•line power from Central Office Terminal (COT)
•terminations with internal protectors for HDSL inputs and metallic bypass pair (except 4G which is
unprotected)
•terminations can be added when PG-Flex is used with a doubler (included with 4G and 4H)
•3/4-, 1-, 11/2-, 2-inch cable entrance conduit knockouts with rubber grommet (provided)
•hinged cover for electronics inside RT Enclosure
See Table 1 on page 6 to identify which features are available with each RT Enclosure List 4xmodel.

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Table 1. Features of FRE-765 List 4x RT Enclosures
List 4 List 4A List 4B List 4D List 4E List 4F List 4G List 4H
System 12 Channel XXXXXXXX
24 Channel XXXXXXXX
25-pair Amphenol (male) X
AMP Insulation Displacement X
15-foot PVC Cable Stub X
Subscriber 25-foot Air Core Cable Stub X
Terminations 25-foot Gel Filled Cable Stub X
1-foot PVC Cable with Male
Amphenol X
12-foot PVC Cable with Male
Amphenol X
RayChem MSP X
Subscriber
Protection 5-pin sockets (short housing) X X X X
RayChem MSP X
AMP Insulation Displacement X X X X
HDSL RayChem MXC X
Terminations RayChem MSP X
25-foot Non-filled Cable Stub X
25-foot Gel Filled Cable Stub X

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Specifications
Environmental
Operating Temperature -40 °F to +150 °F (-40 °C to +65 °C)
Operating Humidity 5% to 95% (non-condensing)
Operating Elevation -200 feet to 13,000 feet (-60 m to 4,000 m)
Dimensions
Weight:
List 4 21.2 lb (09.6 kg)
List 4A 26.3 lb (11.9 kg)
List 4B 22.7 lb (10.3 kg)
List 4D 30.4 lb (13.8 kg)
List 4E 30.4 lb (13.8 kg)
List 4F 25.0 lb (11.3 kg)
List 4G 25.5 lb (12.5 kg)
List 4H 29.2 lb (13.3 kg)
Lists 4, 4A, 4B, 4D, 4E, 4F
Height: 19.25 in. (48.9 cm)
Width: 14.25 in. (36.2 cm)
Depth: 05.93 in. (15.0 cm)
List 4H
Height: 21.25 in. (53.9 cm)
Width: 16.75 in. (42.5 cm)
Depth: 06.44 in. (16.3 cm)

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FUNCTIONAL DESCRIPTION
Operational Capabilities
The FRE-765 List 4x RT enclosure requires the following plug-in units:
•one RT Line Unit which is line powered via the HDSL pairs that connect the RT to the PG-Flex COT line
units installed in a COT Shelf.
•one Channel Unit, minimum, with a maximum installation of three Channel Units, supporting up to 24
channels.
Table 2 shows how circuit assignments are configured in the FRE-765 with the following deployment rules:
•for channel units providing four (4) circuits, Ckt 1 through Ckt 4 are used for Tip and Ring terminations.
•for channel units providing eight (8) circuits, Ckt 1 through Ckt 8 are used for Tip and Ring terminations.
•for a 24-channel system, you can provision a maximum of 24 circuits.
Each PG-Flex channel unit provides four (4) or eight (8) circuits. Table 3 shows how the channels are assigned,
dependent on the type of service provided, such as:
•Plain Old Telephone Service (POTS)
•Integrated Services Digital Network (ISDN)
•Digital Data System (DDS).
Table 2. FRE-765 Circuit Assignments
Line Unit Channel Unit 1 Channel Unit 2 Channel Unit 3 Channel Unit 4
Refer to
Table 8, Table 9,
and
Table 12
for Line Unit
Terminations
from the Backplane
Ckt 1 Ckt 1 Ckt 1
Ckt 2 Ckt 2 Ckt 2
Ckt 3 Ckt 3 Ckt 3
Ckt 4 Ckt 4 Ckt 4 Not
Ckt 5 Ckt 5 Ckt 5 Used
Ckt 6 Ckt 6 Ckt 6
Ckt 7 Ckt 7 Ckt 7
Ckt 8 Ckt 8 Ckt 8

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Backplane Connections
Table 4 lists the FRE-765 List 4xbackplane connectors and where each connector is described in this practice.
Table 3. Channel Unit Circuit Utilization
Channel Unit Service Configurations
Channel Unit 4-Channel POTS 8-Channel POTS 4-Channel ISDN 4-Channel DDS
T/R 1 Ckt 1 Ckt 1 Ckt 1 Ckt 1 Tx
T/R 2 Ckt 2 Ckt 2 Ckt 2 Ckt 1 Rcv
T/R 3 Ckt 3 Ckt 3 Ckt 3 Ckt 2 Tx
T/R 4 Ckt 4 Ckt 4 Ckt 4 Ckt 2 Rcv
T/R 5 —Ckt 5 —Ckt 3 Tx
T/R 6 —Ckt 6 —Ckt 3 Rcv
T/R 7 —Ckt 7 —Ckt 4 Tx
T/R 8 —Ckt 8 —Ckt 4 Rcv
Table 4. FRE-765 List 4x Backplane Connectors
List Connector or Fuse Go to On
4, 4B, 4G P1 Connector (12/24 channel systems) Table 5 page 10
4A Subscriber terminations (12/24 channel systems) Table 13 page 22
4D, 4E Subscriber terminations (12/24 channel systems) Table 16 page 25
4F Subscriber terminations (12/24 channel systems) Table 17 page 26
4H Subscriber terminations (12/24 channel systems) Table 14 page 23
All P3 and P2 Connectors (16/32 channel systems, reference) Table 6 and
Table 7 page 11
All Test and Configuration Line-Unit Terminations Table 8 page 13
All HDSL, Metallic Bypass, and Auxiliary Power Line-Unit Terminations Table 12 page 18
All Power and Ground Line-Unit Terminations Table 9 page 13

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* Shaded terminations used only with the 8 Channel POTS or 4 Channel DDS Units.
† For List 4, connect the subscriber termination cable to backplane connector P1. For List 4G, the
Amphenol-ended cable is connected to P1.
‡ For List 4B, terminate subscriber lines to the cable stub that attaches to backplane connector P1
cable.
Table 5. P1 Connector for Lists 4, 4B, and 4G*
Channel
Unit Circuit
Backplane Connector P1
(Lists 4, 4B, and 4G) †Subscriber Cable Stub (List 4B only) ‡
Tip Ring Tip Ring
126 1WH/BL BL/WH
227 2WH/OR OR/WH
328 3WH/GN GN/WH
1 4 29 4WH/BN BN/WH
530 5WH/SL SL/WH
631 6RD/BL BL/RD
732 7RD/OR OR/RD
833 8RD/GN GN/RD
134 9RD/BN BN/RD
235 10 RD/SL SL/RD
336 11 BK/BL BL/BK
2 4 37 12 BK/OR OR/BK
538 13 BK/GN GN/BK
639 14 BK/BN BN/BK
740 15 BK/SL SL/BK
841 16 YL/BL BL/YL
142 17 YL/OR OR/YL
243 18 YL/GN GN/YL
344 19 YL/BN BN/YL
3 4 45 20 YL/SL SL/YL
546 21 VI/BL BL/VI
647 22 VI/OR OR/VI
748 23 VI/GN GN/VI
849 24 VI/BN BN/VI

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* Terminations in this table are used only with the 8 Channel POTS or 4 Channel DDS
Units.
† Shaded terminations used only with the 8 Channel POTS or 4 Channel DDS Units.
Table 6. Connector P3 (16/32 Channel Systems)*†
Channel
Unit Circuit Backplane Connector P3 Subscriber Cable Stub
Tip Ring Tip Ring
126 1WH/BL BL/WH
227 2WH/OR OR/WH
328 3WH/GN GN/WH
1 4 29 4WH/BN BN/WH
530 5WH/SL SL/WH
631 6RD/BL BL/RD
732 7RD/OR OR/RD
833 8RD/GN GN/RD
134 9RD/BN BN/RD
235 10 RD/SL SL/RD
336 11 BK/BL BL/BK
2 4 37 12 BK/OR OR/BK
538 13 BK/GN GN/BK
639 14 BK/BN BN/BK
740 15 BK/SL SL/BK
841 16 YL/BL BL/YL

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* Shaded terminations used only with the 8 Channel POTS or 4 Channel DDS Units.
Table 7. Connector P2 (16/32 Channel Systems)*
Channel
Unit Circuit Backplane Connector P2 Subscriber Cable Stub
Tip Ring Tip Ring
126 1WH/BL BL/WH
227 2WH/OR OR/WH
328 3WH/GN GN/WH
3 4 29 4WH/BN BN/WH
530 5WH/SL SL/WH
631 6RD/BL BL/RD
732 7RD/OR OR/RD
833 8RD/GN GN/RD
134 9RD/BN BN/RD
235 10 RD/SL SL/RD
336 11 BK/BL BL/BK
4 4 37 12 BK/OR OR/BK
538 13 BK/GN GN/BK
639 14 BK/BN BN/BK
740 15 BK/SL SL/BK
841 16 YL/BL BL/YL

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INSTALLATION AND TEST
Unpacking
Upon receipt of the equipment:
1Unpack 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.
2Check the contents against the packing list to ensure complete and accurate shipment. If the shipment is short
or irregular, contact PairGain as described in “TECHNICAL SUPPORT” on page 30. If you must store the
equipment for a prolonged period, store the equipment in its original container.
* The RT enclosure is shipped with the “CHASSIS GND” wire-wrap post
connected to the adjacent “GND” wire-wrap post on the RT Backplane.
Table 8. Test and Configuration Line Unit Terminations
Connector Type Function
ID_0
GND .045 in. Wire-wrap No connection—reserved for future use.
ID_1
GND .045 in. Wire-wrap No connection—reserved for future use.
ID_2
GND .045 in. Wire-wrap No connection—reserved for future use.
TEST_IN_TIP
TEST_IN_RING .045 in. Wire-wrap No connection—reserved for future use.
TEST_OUT_TIP
TEST_OUT_RING .045 in. Wire-wrap No connection—reserved for future use.
SSC1_A
SSC1_B .045 in. Wire-wrap No connection—reserved for future use.
SSC2_A
SSC2_B .045 in. Wire-wrap No connection—reserved for future use.
Table 9. Power and Ground Line Unit Terminations
Connector Type Function
-48V Screw No connection—reserved for future use.
GND Screw No connection—reserved for future use.
CHASSIS GND*Screw Chassis Ground

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Installation Requirements
Prior to installing the FRE-765, review installation requirements and conditions in Table 10.
Mounting
The FRE-765 mounts on a pole or a wall. Follow local practices to ensure a secure mounting. Mount the FRE-765
for easy access to the cable entry points on the bottom of the enclosure. Provide ample room to open the door
completely.
Table 10. Installation Requirements
Requirement Description
Environmental The FRE-765 can operate in an outside plant environment in a temperature range of -40°C to
+65°C and a humidity range of 5% to 95% (non-condensing).
Mounting The RT enclosure has external mounting flanges with a clearance hole for a 3/8-inch bolt for pole
or wall mounting. The customer must provide the appropriate mounting hardware. When
mounting to a pole using the Pole Mounting Kit (part number 150-1397-0x), ensure that the kit
and FRE-765 are fully installed before installing cabling.
Power The FRE-765 gets power from the HDSL lines connected to the COT shelf in the
Central Office (CO). When a doubler is installed between the PG-Flex COT Shelf and RT
enclosure, two additional power pairs are required from the COT shelf to the RT enclosure.
HDSL Lines Two HDSL pairs are terminated in the RT enclosure.
Subscriber Lines
List 4 Provides three 25-pair Amphenol connectors (male) for terminating the subscriber lines.
List 4A Provides AMP Quiet Front insulation displacement connections for subscriber terminations.
List 4B Provides one 15-foot PVC 25-pair cable stub.
List 4D Provides two 25-foot Air Core Cables for HDSL and Subscriber Terminations.
List 4E Provides two 25-foot Gel Filled Cables for HDSL and Subscriber Terminations.
List 4F Provides one 1-foot PVC Cable with Amphenol for Subscriber Terminations.
List 4G Provides one 12-foot PVC Cable with Amphenol for Subscriber Terminations.
List 4H Provides RayChem Modular Station Protector (MSP) for Subscriber Terminations.
Metallic Bypass Pair The metallic bypass pair for subscriber line testing is terminated in the FRE-765. Donot connect
the bypass pairs between PG-Flex systems or to other DLC systems.
Doubler (except 4H) When using a doubler, add two terminals to the FRE-765 to terminate the auxiliary power pairs
from the COT. Order the terminal kit (Amp Quiet Front p/n 150-1399-25), which contains two
terminators, four jumpers, and two screws for mounting the terminations on the RT enclosure
backplane.
Cable Entry Knockouts are located on the bottom of the FRE-765 and accept 3/4-, 1-, 11/2-, and 2-inch
fittings.Install the grommet (provided with FRE-765), conduit,or cable strain relief fittings prior
to wiring the FRE-765.
Protectors Install 5-pin protectors (short housing) for each working subscriber circuit with the List 4A, List
4D, List 4E, and List 4F. These may be carbon, gas tube, or solid state protectors, depending on
local practice.

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For pole mounting the FRE-765, use the Pole Mounting kit, part number 150-1397-0x. Follow the instructions
that are included to install the pole mounting bracket. Then mount the FRE-765 to the bracket. Do not install any
cabling until the FRE-765 is securely mounted.
When required, install the grommet into the base of the FRE-765 (see Figure 8) prior to performing any wiring
(Table 11 shows the wire gauges that you can install through the holes in the grommet):
1Select only one concentric knockout hole on the FRE-765.
2Remove the largest knockout so that the entire hole is open.
3Install the grommet from the outside of the FRE-765.
(Hint - Hold it at an angle to the hole and roll it into position.)
4Ensure that the lip of the grommet rests on the bottom of the FRE-765 around the knockout hole.
5Use an appropriate tool to open the required hole(s) in the bottom of the grommet.
Figure 8. Installing the Grommet
* Recommend using one hole for both the HDSL and the bypass pairs (i.e., 6-pair cable) and using the second hole for
POTS (subscriber) lines.
† Dependent upon gauge of wire used.
Table 11. Grommet Hole Diameters
For this grommet hole size Use this cable
.410 to .765 in. diameter (two) *•24 or 26 AWG, 25- or 50-pair Primary Interexchange Carrier (PIC) (filled or
non-filled)
•22 AWG, 25-pair PIC (filled or non-filled)
•22, 24, or 26 AWG , 6- or 11-pair PIC (filled or non-filled)
.240 to .275 in. diameter (one) ground wire †
.155 to .240 in. diameter (one) ground wire †

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Wiring
The following section describes how to connect and verify the FRE-765 cable installations.
Chassis Ground Wiring. To install the chassis ground wire, follow the instructions below and refer to the
specific illustrations:
For Lists 4, 4B and 4G refer to Figure 9.
For Lists 4A, 4D, 4E and 4F refer to Figure 10.
For List 4H refer to Figure 11.
1Route the chassis ground wire through the small hole in the strain relief on the bottom of the enclosure.
2For Lists 4, 4B, and 4G, connect one end of the chassis ground wire to the grounding lug (see Figure 9).
For Lists 4A, 4D, 4E, 4F (Figure 10on page 17),and4H (Figure 11 onpage 17) connect one end ofthe chassis
ground wire to the grounding bar.
3Connect the other end of the chassis ground wire to a suitable ground termination point (ground rod or cold
water pipe).
4Tighten the strain relief around the wire.
Figure 9. Installing the Ground Wire (List 4, 4B, and 4G)
Use 6 AWG wire to ensure a good ground connection to the FRE-765.