Performance monitoring and fault location for optical equipment,

Details Performance monitoring and fault location for optical equipment, Performance monitoring and fault location for optical equipment,

1992-07-17

1994-03-22

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

371 295, 34082507, H04B 1008

Patent

active

052969568

ABSTRACT:
A performance monitoring technique which allows faults within an optical communication system to be detected and located. More specifically, a technique employing a signal generator to controllably insert maintenance signals at the input and output of each module within an optical communication system, and a single monitor to receive the inserted maintenance signals at a fixed point within the system, and, in response, determine the location of faulty modules. The monitor analyzes the received inserted maintenance signals, and locates faults by pinpointing modules from which a maintenance signal inserted at the module output is received uncorrupted by the monitor, but which return a corrupted maintenance signal when the insertion is made at the module input. A particular embodiment of the invention enables the maintenance signals to be inserted via pre-existing control drivers within system modules. This allows optical losses with the system to be minimized by eliminating the need for introduction of additional optical couplers or attenuators into the system.

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