When a transmitter detects a collision, the transmitter continues to send
the preamble, (if the preamble has not completed), and also sends 32
additional bits, which are called a jam signal. The jam signal extends the
duration of the collision event to ensure that all stations hear the
collision. The contents of the jam can be any pattern that is not
intentionally designed to be the 32-bit CRC value corresponding to the
(partial) frame already transmitted. Most implementations send all ones.
Completely sending the preamble and transmitting a jam signal guarantees
that a signal stays on the media long enough for all transmitting stations
involved in the collision to recognize the collision and react accordingly.
Priscilla
>On Thu, 24 May 2001, [EMAIL PROTECTED] wrote:
>
> > What is an "ethernet a jam signal"
________________________
Priscilla Oppenheimer
http://www.priscilla.com
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=5809&t=5796
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