Jam signal
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In telecommunications, a jam signal is a signal that carries a bit pattern sent by a data station to inform the other stations that they must not transmit.
Note 1: In carrier sense multiple access with collision detection (CSMA/CD) networks, the jam signal indicates that a collision has occurred.
Note 2: In carrier sense multiple access with collision avoidance (CSMA/CA) networks, the jam signal indicates that the sending station intends to transmit.
Note 3: "Jam signal" should not be confused with "electronic jamming."
This article contains material from the Federal Standard 1037C, which, as a work of the United States Government, is in the public domain.
