Patent ID: 7822340

Claim:
An arrangement in a fiber optic network device for analyzing a set of optical signals traversing said fiber optic network device, comprising: a set of ports, said set of ports including at least a set of input ports for receiving said set of optical signals and a set of output ports for outputting said set of optical signals from said fiber optic network device; a set of photodiodes, said set of photodiodes being configured at least for receiving and forwarding said set of optical signals; and a splitter, said splitter being configured at least for receiving said set of optical signals from a first photodiode of said set of photodiodes, splitting said set of optical signals into at least a first part and a second part, and forwarding said first part to a second photodiode of said set of photodiodes and said second part to a third photodiode of said set of photodiodes, whereas said set of optical signals is configured to traverse said fiber optic network device between said set of input ports and said set of output ports irrespective whether power is provided to circuitry of said fiber optic network device.