Circuit and method of testing for silent faults in a...

Details Circuit and method of testing for silent faults in a... Circuit and method of testing for silent faults in a...

H - Electricity

04

B

H04B 10/24 (2006.01) H04B 10/08 (2006.01) H04B 10/12 (2006.01)

Patent

CA 2182450

In optical communications systems crosstalk can result in what is termed silent failure. In silent failure, a faulty transmitter appears to function correctly because a receiver in communication therewith is receiving a signal induced by crosstalk. The invention overcomes this problem by tapping the received signal and monitoring it external to the receiver in order to ensure adequate signal levels for a received signal. A microcontroller disables the failed circuit and in an embodiment switches the communication functions to a stand-by circuit.

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