Central monitoring system of a multiplex subscriber loop carrier

Details Central monitoring system of a multiplex subscriber loop carrier Central monitoring system of a multiplex subscriber loop carrier

1993-06-30

1995-03-21

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

379 27, H04J 116, H04J 314

Patent

active

054003210

ABSTRACT:
A central monitoring system of a multiplex subscriber loop carrier has a remote terminal which includes a first subscriber line tester for testing first subscriber lines connected to subscriber terminals so as to detect a fault on a first subscriber line and outputting an alarm if the fault is detected. A central office terminal is connected to the remote terminal via a carrier line and to a local switch via second subscriber lines. The central office terminal includes a dummy fault generating circuit which represents the fault. Upon receiving the alarm via the carrier line, the dummy fault generating circuit is connected via a transfer switch to one of the second subscriber lines which corresponds to the first subscriber line having the fault thereon. Then, a second subscriber line tester provided in the local switch for testing the second subscriber lines detects the dummy fault generating circuit to provide a message informing that the fault is on the first subscriber line which corresponds to the second subscriber line having the dummy fault generating circuit connected thereto.

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"A New Approach to Testing Loops Served by Pair Gain Systems", Swanson, IEEE, 1979, pp. 51.6.1-51.6.5.

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