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Overview
A
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.
PG-Flex COT
8 Loop Start, Ground Start
CO Battery
or mixture of Loop Start and
Alarm
Ground Start lines
Test Access
(PGTC)
Figure 1. Typical System with Loop Start and Ground Start Capabilities
Operational Capabilities
FRC-753 Functions
The FRC-753 provides eight POTS channel interfaces between the RT and the subscriber. 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. The battery feed can be disconnected and the loop opened to a drop connection when a forward
disconnect signal is received from the FLC-703. The battery feed can also reverse the polarity of the output as a
physical signal of far end supervision.
The FRC-753 has protection from lightning and power crosses.
2
2 Pair
PG-Flex RT
HDSL, Power
Optional:
One additional pair
for Metallic Bypass
July 23, 1999
363-753-142-01, Revision 01
8 Loop Start, Ground Start
or mixture of Loop Start and
Ground Start lines
FRC-753 List 4B
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