Communication system

Details Communication system Communication system

H - Electricity

04

L

340/84

H04L 5/14 (2006.01) H04L 12/437 (2006.01)

Patent

CA 1189927

ABSTRACT COMMUNICATION SYSTEM A communication system has a first station (SO) and a plurality of further stations (S1 - S4), two communication channels (A, B), for transmission in opposite directions, serially connecting the stations. The first station includes routing means operable in a double looped mode to route signals received on each channel onto the respective other channel and the further stations each including routing means operable in a through mode to forward, in the same channel, signals received on each channel, thereby forming a single folded transmission path. Preferably the further stations each are responsive to the cessation of signalling energy (e.g. a break in the transmission path) on a channel to assume a looped mode in which signals received in the other channel are rerouted onto that channel, with the first station responding by assuming a through mode in which signals received on each channel are forwarded in the same channel, again forming a single folded transmission path follow- ing rerouting at two of the further stations.

421095

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