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PairGain PG-Flex FRC-753 4B Manual

Eight channel remote terminal loop start/ground start unit
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E
IGHT
L
OOP
Model
FRC-753
E
NGINEERING
PG-F
C
R
HANNEL
EMOTE
S
/G
TART
ROUND
List Number
4B
FRC 753
CHAN UNIT
LIST
A
C
T
I
V
E
FAULT
PairGain
P
G
T
AIR
AIN
ECHNOLOGIES
S
ERVICES
S
363-753-142-01
ECTION
LEX
T
ERMINAL
S
TART
Part Number
150-1353-42
1
2
3
4
5
6
7
8
, I
.
NC
T
P
ECHNICAL
RACTICE
U
NIT
CLEI Code
VARHCKTC--

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Summary of Contents for PairGain PG-Flex FRC-753 4B

  • Page 1 PG-F IGHT HANNEL EMOTE ERMINAL TART ROUND TART Model List Number Part Number CLEI Code FRC-753 150-1353-42 VARHCKTC-- FRC 753 CHAN UNIT LIST FAULT PairGain ECHNOLOGIES NGINEERING ERVICES ECHNICAL RACTICE 363-753-142-01 ECTION...
  • Page 2 PairGain and PG-Flex are registered trademark 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.
  • Page 3 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.

  • Page 4: Table Of Contents

    Table of Contents 363-753-142-01, Revision 01 ABLE OF ONTENTS Overview ____________________________________________________________________________ 1 Description and Features ........................1 Applications............................2 Operational Capabilities...................... 2 FRC-753 Functions....................2 Circuit Operation ....................3 Front Panel............................4 Specifications ............................ 5 Installation and Test ___________________________________________________________________ 6 Installing the FRC-753 into the RT Enclosure ..................

  • Page 5: Overview

    Overview VERVIEW ® ® The PairGain PG-Flex FRC-753 List 4B Loop Start/Ground Start Channel Unit provides eight loop start or ground start (LS/GS) channel interfaces for POTS between a PG-Flex Remote Terminal (RT) and subscribers. You can provision each of the eight circuits separately for either loop start or ground start services. Provisioning is done through the PG-Flex Line Unit Maintenance port.

  • Page 6: Applications

    Overview 363-753-142-01, Revision 01 PPLICATIONS The FRC-753 can be configured to provide service in any one of the following ways: • eight independent loop start subscriber lines • eight ground start PBX lines • a mixture of both loop start subscriber lines and ground start PBX lines Figure 1 shows a typical system with loop start and ground start services.

  • Page 7: Circuit Operation

    363-753-142-01, Revision 01 Overview Circuit Operation The following paragraphs define the FRC-753 circuit operation when using loop start for subscriber lines or ground start for PBX lines. Each FRC-753 circuit has an associated LED that indicates when the line is off-hook, idle, ringing, or under test.

  • Page 8: Front Panel

    Overview 363-753-142-01, Revision 01 RONT ANEL Figure 2 shows the FRC-753 front panel. Table 1 lists the different states and indications for the FRC-753 Channel Unit front panel LEDs. Figure 2. FRC-753 Front Panel To reduce power at the RT, the LEDs extinguish after a 2-minute timeout period. Press and hold the ACO button on the RTLU for two seconds to re-activate the LEDs for another two minutes.

  • Page 9: Specifications

    363-753-142-01, Revision 01 Overview PECIFICATIONS Electrical Characteristics 600 Ω Analog Impedance 530 Ω + 430 Ω handset Subscriber Drop DC Loop Current 23 mA Ringer Output 40 V RMS, 3 lines simultaneous, 5 REN each End-to-End Loss -2.5 dB ± 1.0 dB Lightning Protection GR-CORE-1089, Section 4 Environmental...

  • Page 10: Installation And Test

    Installation and Test 363-753-142-01, Revision 01 NSTALLATION AND Observe normal electrostatic discharge precautions when handling electronic equipment. Do not hold electronic plug-ins by their edge. Do not touch components or circuitry. FRC-753 RT E NSTALLING THE INTO THE NCLOSURE Insert the FRC-753 into the RT Enclosure and observe that all LEDs: •...

  • Page 11: Troubleshooting

    363-753-142-01, Revision 01 Troubleshooting ROUBLESHOOTING UBSCRIBER ESTING For PG-Flex subscriber drop testing from the CO, select and connect any subscriber drop to a metallic test pair at the RT. PG-Flex extends this connection to the COT where it can be switched onto the test access bus or to the corresponding subscriber line on the COT channel card.

  • Page 12: Customer Reported Problems

    If ring trip does not occur, replace the RT • loop length too long Channel Unit. If ring trip still does not occur, contact PairGain technical assistance (refer to “Technical Support” on Inside back cover).

  • Page 13: Abbreviations

    363-753-142-01, Revision 01 Abbreviations BBREVIATIONS Alarm Cut-off Switch CLASS Custom Local Area Signalling Services Central Office COLU Central Office Line Unit Central Office Terminal DTMF Dual Tone Multi Frequency LS/GS Loop Start/Ground Start Mechanized Loop Testing Private Branch Exchange Pulse Code Modulation PGTC Pair Gain Test Controller POTS...

  • Page 15: Product Support

    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.
  • Page 16 Corporate Office 14402 Franklin Avenue Tustin, CA 92780 Tel: (714) 832-9922 Fax: (714) 832-9924 For Technical Assistance: (800) 638-0031...

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