Method for monitoring the operation of optical supply line...

Details Method for monitoring the operation of optical supply line... Method for monitoring the operation of optical supply line...

2005-02-01

2005-02-01

Pascal, Leslie (Department: 2633)

Optical communications

Diagnostic testing

Determination of communication parameter

C398S030000, C398S032000, C398S033000, C398S168000

Reexamination Certificate

active

06850706

ABSTRACT:
An optical auxiliary signal, produced in a central device, is transmitted in addition to a user signal from the central to a remote optical device via at least two optical supply line fibers which are provided for transmitting optical signals between the central and remote optical devices. The optical auxiliary signal received in the remote optical device is diverted, is transmitted via a second optical supply line fiber to the central optical device, and the reception or the absence of the optical auxiliary signal and of the optical user signal in the central optical device are evaluated in order to monitor the operational state of the optical supply line fibers.

REFERENCES:
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patent: 5923453 (1999-07-01), Yoneyama
patent: 5943146 (1999-08-01), Harano
patent: 5995254 (1999-11-01), Koga et al.
patent: 6028684 (2000-02-01), Kidorf
patent: 6301404 (2001-10-01), Yoneyama
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patent: 199 09 565 (2000-10-01), None
A Cost-Effective Approach to Introduce an Optical WDM Network in the Metropolitan Environment, Johansson et al, pp. 1109-1122.

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