A method for sub-network connection protection via serial monitoring function
A technology of subnet and function, applied in the field of optical communication, can solve the problems of normal service impact of H subnet, switching of C subnet, service interruption and other problems
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[0024] The method provided by the present invention to realize the subnet connection protection by monitoring the TCM function in series is applicable to the synchronous digital system SDH domain composed of two TCM source subnets and one TCM sink subnet, and the method introduces the TCM function of the intermediate node mode , including the steps: (a) setting the subnet configured with subnet connection protection as an intermediate node TCM function mode; (b) detecting the signals transmitted by the two TCM source subnets respectively, when the TCM on the current working channel is detected In the signal transmitted by the source subnet, the N1 or N2 byte contains the incoming alarm indication signal Incoming AIS information, and the protection channel signal is valid, then perform a switching action to switch the service from the working channel to the protection channel; (c) for N1 or N2 The content of the byte is passed through and transparently transmitted to the downstr...
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