Bit-by-bit time-division switching network

Details Bit-by-bit time-division switching network Bit-by-bit time-division switching network

1981-05-18

1983-10-25

Brigance, Gerald L.

Multiplex communications

Wide area network

Packet switching

370 67, 370 80, H04J 600, H04Q 1104

Patent

active

044123248

ABSTRACT:
A bit-by-bit time-division digital switching network switches incoming and outgoing isochronous digital channels having rates which are different but sub-multiples of a given low rate. After phasing the incoming channels, bits having a predetermined binary state are detected. Previously stored addressed words of the outgoing channels to be switched to the incoming channels are read out and multiplexed into an intermediate multiplex highway in response incoming channel bits having the predetermined state. This predetermined state is respectively that of the received bit, or its inverse if the sum of the incoming channel word bits is respectively less than, or greater than half the number of incoming word bits. Each multiplex highway multiframe is composed of a number of outgoing channel address words equal at most to half the number of incoming channels. A frame or certain parts of the multiframe in the multiplex highway indicate, by the presence or the absence of the outgoing channel address word, whether or not the incoming channel word bits have been inverted.

REFERENCES:
patent: 4258434 (1981-03-01), Glowinski et al.
patent: 4335456 (1982-06-01), Gaiser et al.

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