Communications system with protection switching and channel iden

Details Communications system with protection switching and channel iden Communications system with protection switching and channel iden

1985-08-02

1987-02-24

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

34082501, H04J 314

Patent

active

046462864

ABSTRACT:
An optical fiber communications system with a plurality of bidirectional channels and a protection channel is disclosed. Each channel has a respective identity which is transmitted in the traffic of that channel and in the event of a protection switch is identified in the protection channel traffic. A protection switch is effected by detecting a channel failure at the receive end of a span, transmitting a protection request on the return channel back to the transmit end of the span, and using this request in a controller for the channel to effect a protection switch, using an individual selector for the channel, if a priority scheme allows. The controllers are enabled or disabled under software control following a protection switch in accordance with the prevailing priority scheme. The arrangement provides for rapid protection switching.

REFERENCES:
patent: 4365247 (1982-12-01), Bargeton
patent: 4376999 (1983-03-01), Abbott et al.
patent: 4382294 (1983-05-01), Beuscher et al.
patent: 4412323 (1983-10-01), Abbott et al.
patent: 4455645 (1984-06-01), Mijioka et al.
patent: 4463350 (1984-07-01), Kajiura et al.
patent: 4543651 (1985-09-01), Chang
patent: 4598399 (1986-07-01), Bath

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