Patent ID: 8532483

Claim:
A method for diagnosing an optical communication network, the network including a control system, an optical hub, and a plurality of optical network terminators, wherein the optical hub communicates with the network terminators via an inband management channel and wherein, if one of the network terminators disturbs a communication from the network terminators to the hub and the communication from the hub to the network terminators is functional, the control system sends a shut-off command from the control system to one network terminator and checks whether or not the disturbance is gone, the method comprising: if the disturbance is not gone, with the control system: sending a pulse mode activation command from the control system to a given network terminator; checking whether there is a superposition signal of the disturbance signal with a pulse mode signal; and if the pulse signal is not superimposed, marking the given network terminator as bad.