Importance

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Abstract

In a data communications systems having a communications channel (3) for interconnecting a plurality of transceivers (1) and (2), each of said transceivers (1) and (2) including means (80) for transmitting a signal having transitions, there is provided a means (20) responsive to the presence and absence of a signal on said communications channel (3) during a transition of a signal transmitted by said transmitting means (80) for providing a collision detected (CD) signal if there is destructive interference with the transmitted signal on said communication channel (3) during a transition of said transmitted signal and means (48) responsive to said CD signal for terminating said transmitting of said signal. In the event the channel (3) is busy prior to a transmission from the transmitter (80) there is provided a carrier sense circuit (14) for indicating the channel is busy and a non-persistent control circuit (45) and a random number generator (90a) and a delay circuit (90b) responsive to the carrier sense circuit (14) and the collision detector circuit (20) for interrupting and delaying the transmitting of each of the transceivers (1) and (2) for a random period of time.

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First Claim