Abstract: In view of problem that state of each node of subring cannot be monitored after network elements control panel of tangent point of synchronous digital hierarchy transmission system has fault, the paper took fault of network elements control panel of tangent point of synchronous digital hierarchy transmission system of a Group Company as example, analyzed cause of the fault and proposed a solution. The solution makes Qx interface of any network elements control panel of subring access into network management terminal, so as to realize monitoring for whole subring network except fault node. Actual application shows that the solution realizes real-time monitoring for services such as dispatching communication, video conference carried by the synchronous digital hierarchy transmission system.