Optical communition system with N + 1 redundancy

Details Optical communition system with N + 1 redundancy Optical communition system with N + 1 redundancy

2011-01-04

2011-01-04

Liu, Li (Department: 2613)

Optical communications

Fault recovery

C398S002000, C398S005000, C398S008000, C398S009000, C398S010000, C398S017000, C398S022000, C398S035000, C398S066000

Reexamination Certificate

active

07865077

ABSTRACT:
An optical communication system has two or more active interfaces, each controlling the transmission and reception of optical signals between a communication network and one or more subscriber terminals according to control information pertaining to the individual subscriber terminals. The control information used by all the active interfaces is stored in a memory. The optical communication system also has a standby interface that is functionally equivalent to the active interfaces, and an optical switching apparatus that switches data transmission paths among the network, the active and standby interfaces, and the subscriber terminals. If a fault is detected in an active interface, the standby interface extracts the control information of the faulty interface from the memory, and the optical switching apparatus switches the data transmission paths so that the standby interface replaces the faulty interface.

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