Patent ID: 7167611

Claim:
An optical switch device, comprising: a switch fabric, wherein the switch fabric includes first and second switch fabrics; a plurality of input ports through which incoming data contained in a bearer signal passes to the switch fabric, wherein at least one of the plurality of input ports includes a splitter for splitting a signal incoming to the at least one input port into first and second signal, wherein the first signal is received by the first switch fabric and the second signal is received by the second switch fabric; a plurality of output ports through which outgoing data passes from the switch fabric; a demultiplexing device coupled to at least one of the plurality of input ports for injecting an optical connection verification signal into the switch fabric; a signal generator coupled to the demultiplexing device for injecting the optical connection verification signal on a polling basis into the switch fabric at a frequency that is different from a frequency of the bearer signal; a multiplexing device coupled to at least one of the plurality of output ports; and a first signal analyzer coupled to the multiplexing device for analyzing the data injected by the signal generator.