Link monitoring and management in optical star networks

Details Link monitoring and management in optical star networks Link monitoring and management in optical star networks

1995-02-24

1996-05-07

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370 161, 359121, H04L 12437

Patent

active

055153615

ABSTRACT:
A method and apparatus for monitoring links in an optical star network along with means for taking down a link in the event of a failure without disruption to other parts of the network, bringing back the link into operation once the failure is corrected, while adhering to eye-safety regulations. More specifically, when one link of a pair of links connecting a station to a star coupler fails, the failure is detected by a monitor and the links of the pair are connected to each other by a switch. This connection of the two links provides a look from the transmitter of the station through the pair of links and to the receiver of the station. This connection also disconnects the station from the star network. When the pair of links again become operable, a signal is detected as passing from the transmitter through the loop and back to the receiver. Detection of the signal by the receiver then results in switching the pair of links back to the star coupler, thereby reconnecting the station to the star network.

REFERENCES:
patent: 5010550 (1991-04-01), Hirata
patent: 5179548 (1993-01-01), Sandesara
patent: 5278824 (1994-01-01), Kremer
patent: 5317560 (1994-05-01), Ingre et al.

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