Synchronous communications multiplexer

Details Synchronous communications multiplexer Synchronous communications multiplexer

1983-01-28

1985-06-11

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

H04J 302

Patent

active

045233101

ABSTRACT:
A synchronous communications multiplexer for connecting a plurality of synchronous communications lines to an MP (multi-purpose) bus. In its basic form, the multiplexer is capable of handling bit oriented protocols (BOP) and is capable of being upgraded to support byte-oriented protocols. The present invention supports full- or half-duplex data rates of up to 19,200 baud. Total throughput, when operating with four ports (as an example), is in the range of 76.8 kbits/sec. A special mode of operation (unisync) allows operating a single port at 56 kbits/sec., full duplex. Other capabilities include software-selection of parameters (such as baud rate) and operation in a "transmitter queueing" mode of operation.

REFERENCES:
patent: 4071887 (1978-01-01), Daly et al.
patent: 4079452 (1978-03-01), Larson et al.
patent: 4121055 (1978-10-01), Doherty
patent: 4313193 (1982-01-01), Nakano et al.
patent: 4429382 (1984-01-01), Greenstein et al.

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