Method and apparatus for configuring and maintaining token ring

Details Method and apparatus for configuring and maintaining token ring Method and apparatus for configuring and maintaining token ring

1992-04-14

1994-09-27

Chin, Wellington

Multiplex communications

Wide area network

Packet switching

370 8515, 34089105, H04J 302

Patent

active

053512421

ABSTRACT:
An enhanced MAU (EMAU) is provided which can be used in token ring networks in place of existing MAUs, yet permits each station on the network to be selectively connected to any one of a plurality of different token ring trunk cables. The EMAU uses the conventional trunk coupling units (TCU) of an MAU, which permit a station to be connected in the ring or to be bypassed, but adds to each TCU a multi-switch device which permits the TCU to be connected to one of a plurality of ring trunk cables while providing a bypass across the station in the remaining ring trunk cables. In addition, the EMAU provides sensing of the input and output signal for each station, which permits the EMAU to monitor the address produced by each station during the normal ring polling process which occurs during neighbor notification operation of the token ring network. Each address is then stored in a location associated with the physical location of a station. Sensing of the input and output signal is also utilized to perform a peak amplitude comparison between the two, to derive signals indicative of the input-output operability of each station.

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