Same-cable detection method, related equipment and optical communication system

The embodiment of the invention discloses a co-cable detection method, related equipment and an optical communication system, which are used for automatically carrying out co-cable detection. The method provided by the embodiment of the invention comprises the following steps: a network manager obtains a protection switching message, wherein the protection switching message comprises a corresponding relationship between a first communication path and a second communication path of a communication node; the network manager receives a path indication message from a transmission node, the path indication message being used for indicating a connection relationship between a first transmission path of the transmission node and the first communication path, the path indication message is also used for indicating a connection relationship between a second transmission path of the transmission node and the second communication path. And the network manager sends a detection trigger message to the transmission node, w