Abstract: A system and method of controlling a bi-directional switching operation for a synchronous transfer mode (STM-1) signal transmission line of an asynchronous transfer mode (ATM) switch is disclosed. The system and method provide a rapid bi-directional switching operation through a 1+1 structure, being compatible with a 1+N structure, using MSP (Multiplex Section Protection) protocol. The process includes determining whether a signal fail has occurred, determining whether a priority of the signal fail is higher than that of a current signal fail determining whether a target station uses the same protocol as a source station if the priority of the signal fail is higher and performing a switching operation and transmitting a switching notification signal to the target station if the same protocol is used by the target station.

Abstract: A time management method for a switching system include: periodically checking a failure state of an HW time using an OMDC; setting the HW time or a user time as an initial system time in accordance with the failure state of the HW time; resetting a system time by periodically comparing the HW time or an MP time, in which an IPC delay is considered, with an OMP time; requesting the initial system time to an OMP; setting an initial MP time as the received OMP time; and periodically comparing the MP time in which the IPC delay is considered with the OMP time and thereby resetting the MP time.

Abstract: A system and method of controlling a bi-directional switching operation for a synchronous transfer mode (STM-1) signal transmission line of an asynchronous transfer mode (ATM) switch is disclosed. The system and method provide a rapid bi-directional switching operation through a 1+1 structure, being compatible with a 1+N structure, using MSP (Multiplex Section Protection) protocol. The process includes determining whether a signal fail has occurred, determining whether a priority of the signal fail is higher than that of a current signal fail determining whether a target station uses the same protocol as a source station if the priority of the signal fail is higher and performing a switching operation and transmitting a switching notification signal to the target station if the same protocol is used by the target station.