Digital service unit for connecting data processing equipment to

Details Digital service unit for connecting data processing equipment to Digital service unit for connecting data processing equipment to

1988-09-26

1991-10-29

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370 941, 370 92, 370112, 379 93, H04L 900, H04Q 1104

Patent

active

050621041

ABSTRACT:
An apparatus for coupling data processing equipment to subscriber loops in a telephone system based computer network is disclosed. The multipoint communication network includes a plurality of network units with at least two of the network units comprising the apparatus in question. The network units are coupled to telephone system communication links. The network units transmit and receive digital data in a frame mode in which the data is organized into frames on the communication links. The network units also communicate with each other in a manner which allows the configuration and speed of the network to varied in response to the time of day and error rates observed on the telephone system communcation links.

REFERENCES:
patent: 4381427 (1983-04-01), Cheal et al.
patent: 4527012 (1985-07-01), Caplan et al.
patent: 4578538 (1986-03-01), Pascucci et al.
patent: 4745601 (1988-05-01), Diaz et al.
patent: 4750169 (1988-06-01), Carse et al.
patent: 4893340 (1990-01-01), Lubarsky et al.
Dunbar et al., "Dataport-Channel Units for Digital Data System 56-kb/s Rate", The Bell System Technical Journal, vol. 61, No. 9, Nov. 1982, pp. 2741-2756.
Albert, W. G. et al., "Digital Terminal Physical Design", The Bell System Technical Journal, vol. 61, No. 9, Nov. 1982, pp. 2757-2790.

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