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P

RODUCT

 S

UPPORT

T

ECHNICAL

 S

UPPORT

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 - Friday, 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.

W

ARRANTY

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 proper 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 improper 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 at (800) 638-0031.

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.

PairGain continues to repair faulty modules beyond the warranty program at a nominal charge. Contact your 
PairGain sales representative for details and pricing.

FCC C

OMPLIANCE

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when 
the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio 
frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful 
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful 
interference in which case the user will be required to correct the interference at his own expense.

M

ODIFICATIONS

The FCC requires the user to be notified that any changes or modifications made to this device that are not 
expressly approved by PairGain Technologies, Inc. may void the user's authority to operate the equipment.

All wiring external to the product(s) should follow the provisions of the current edition of the National Electrical 
Code.

Telephone:

(800) 638-0031 or (714) 832-9922 

Fax:

(714) 832-9924

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

Page 1: ...T GROUND START UNIT PAIRGAIN TECHNOLOGIES INC ENGINEERING SERVICES TECHNICAL PRACTICE SECTION 363 753 142 01 Model List Number Part Number CLEI Code FRC 753 4B 150 1353 42 VARHCKTC PairGain 1 A C T I...

Page 2: ...ined 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 pr...

Page 3: ...ny 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 a...

Page 4: ...ions 5 Installation and Test ___________________________________________________________________ 6 Installing the FRC 753 into the RT Enclosure 6 Provisioning the FRC 753 6 Verify Operation 6 Troubles...

Page 5: ...bscriber line connection through an optional metallic bypass pair Perform metallic bypass testing either manually or through the Pair Gain Test Controller PGTC Features of the FRC 753 are eight LS GS...

Page 6: ...criber Each FRC 753 detects loop current Ring tip Ring ground The subscriber line battery is supplied by a constant current supply It is sufficient to operate a telephone set over the indicated loop T...

Page 7: ...tion is a Tip lead open and Ring lead negative into the COT and Tip lead open and Ring lead negative at the RT The following occurs when a PBX requests service for an outgoing call by grounding the Ri...

Page 8: ...wer 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 Table 1 FRC 753 Front Panel...

Page 9: ...r 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 Operating Elevation 200 ft to 13 000 ft 60 m to 4 000 m Temper...

Page 10: ...s off no calls are in progress 2 Test circuits for loop start a Place an outgoing call for each subscriber circuit provisioned and observe that the Active LED tracks the progress of the call b Place a...

Page 11: ...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 Activate test access through the RS 232 maintenance port lo...

Page 12: ...from the CO switch If no ringing is present refer the trouble to the CO switch If ringing is present replace the COT Channel Unit Test again for ringing at the network interface If ringing is still no...

Page 13: ...Services CO Central Office COLU Central Office Line Unit COT Central Office Terminal DTMF Dual Tone Multi Frequency LS GS Loop Start Ground Start MLT Mechanized Loop Testing PBX Private Branch Exchan...

Page 14: ......

Page 15: ...uthorization RMA number at 800 638 0031 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...

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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