Multiplex communication arrangement capable of selectively monit

Details Multiplex communication arrangement capable of selectively monit Multiplex communication arrangement capable of selectively monit

1987-06-25

1990-03-13

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

H04J 314

Patent

active

049088181

ABSTRACT:
In a multiplex communication arrangement of an N:1 redundancy configuration, each multiplexer comprises a multiplexing circuit for multiplexing a plurality of multiplexer input signals into a multiplexed signal and an encoder for encoding the multiplexed signal into an encoded signal of self-checking codes, such as the known CRC codes. Into a decoder output signal, a decoder of each demultiplexer decodes a demultiplexer input signal which is in a form of the self-checking codes. As a selected signal, a selector selects one of the decoder output signal and the multiplexed signal produced in one of the multiplexers, (N+1) in number, that the selector selects as a selected multiplexer. A demultiplexing circuit demultiplexes the selected signal into a plurality of demultiplexer output signals. A bit-by-bit comparator compares the multiplexer input signal of the selected multiplexer with the demultiplexer output signals which are produced in one of the demultiplexers, (N+1) in number, for the multiplexed signal produced in the selected multiplexer. Inasmuch as such demultiplexer produces the demultiplexer output signals for a utilization device when the demultiplexer in question is an active one, it follows that the above-mentioned one of the demultiplexers is a stand-by one.

REFERENCES:
patent: 4160877 (1979-07-01), Vander Mey
patent: 4601028 (1986-07-01), Huffman et al.
patent: 4631719 (1986-12-01), Huffman et al.

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