This reports the specific condition currently affecting this virtual ring, distinguishing, for example, a locally-detected signal failure from a locally-issued force switch or a signal failure reported by a remote or other ring node, which is more granular than the coarse protecting/recovering state alone. This lets an admin immediately tell whether a protecting ring is reacting to a real fault on this node's own link versus reacting to a condition reported elsewhere on the ring, which changes where to actually go look for the physical problem. For example, a value of remoteOrOtherPortSignalFail tells the admin the fault triggering this switchover is on some other node's port around the ring, so there's no point inspecting this device's own local fiber connections first.