PairGain 150-1353-43, Техническая практика

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Overview 363-753-143-01, Revision 01
2 April 25, 2000 FRC-753 List 4C
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.
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.
PG-Flex COT
8 Loop Start, Ground Start
or mixture of Loop Start and
Ground Start lines
PG-Flex RT 2 Pair
HDSL, Power
Optional:
One additional pair
for Metallic Bypass
CO Battery
Alarm
Test Access
(PGTC)
8 Loop Start, Ground Start
or mixture of Loop Start and
Ground Start lines