Method of operation of remote data/control apparatus with contro

Details Method of operation of remote data/control apparatus with contro Method of operation of remote data/control apparatus with contro

1992-08-13

1996-01-02

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 853, 370 951, H04L 12413

Patent

active

054815410

ABSTRACT:
This invention relates to communications apparatus, such as remote data/control apparatus. A first unit (10) and a second unit (11) are arranged to exchange messages over a communication channel. To avoid collision between responses between different remote units, the first unit has device for requesting a response from the second unit and circuit for communicating to the second unit a value (23) representing a time delay and the second unit has device for monitoring the channel, determining when the channel becomes free and transmitting its response to the first unit delayed by that time delay after the channel becomes free.

REFERENCES:
patent: 4472802 (1984-09-01), Pin et al.
patent: 4689619 (1987-08-01), O'Brien
patent: 4742335 (1988-05-01), Vogt
patent: 4803679 (1989-02-01), Shimizu
patent: 4940947 (1990-07-01), Sojka
patent: 5103448 (1992-04-01), Barnes et al.
patent: 5122794 (1992-06-01), Warrior
patent: 5177739 (1993-01-01), Basnuevo et al.

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