Monitor system for multiplex equipment

Details Monitor system for multiplex equipment Monitor system for multiplex equipment

1988-04-08

1991-01-22

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

H04L 124

Patent

active

049875680

ABSTRACT:
A monitor system for a multiplex equipment is disclosed, in which a multiplexer and a demultiplexer are monitored by direct comparison of input and output signals thereof. Low-bit-rate output interfaces and high-bit-rate output interfaces include signal-loss detectors respectively. Low-bit-rates input interfaces and high-bit-rate input interfaces, on the other hand, include signal-loss detectors or frame alignment-loss detectors and selectors for loop outputs of the output interfaces of respective speeds back upon the input sides of the input interfaces of respective speeds. An economical monitor circuit for detecting a fault of a multiplex converter and accurately is thus configured without using any bipolar signal switching circuit or low- or high-bit-rate B/U converters.

REFERENCES:
patent: 4376998 (1983-03-01), Abbott et al.
patent: 4631719 (1986-12-01), Huffman et al.
patent: 4712209 (1987-12-01), Kuritani et al.
patent: 4730302 (1988-03-01), Fuerlinger et al.

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