Uniform Switching System and Method for Synchronous Optical Network and Optical Transport Network

A method for switching an Optical Transport Network (OTN) signal using a Synchronous Digital Hierarchy (SDH), comprising:

• adapting an SDH signal received into a synchronous transfer mode bus to generate a synchronous transfer mode bus signal in response to synchronizing, based on a system clock signal and a frame header indication signal, the SDH signal received with a system clock and a frame header;
• cross-connecting the synchronous transfer mode bus signal at a uniform level of a synchronous transfer mode rate;
• and
• restoring the cross-connected synchronous transfer mode bus signal to the SDH signal based on the system clock signal and the frame header indication signal, and sending the SDH signal.

A system for switching an Optical Transport Network (OTN) signal using a Synchronous Digital Hierarchy (SDH), comprising:

• a system clock unit for providing a system clock signal and a frame header indication signal;
• a cross-connection unit for cross-connecting a signal at a uniform level of a synchronous transfer mode rate;
• an OTN signal interface processing unit for mapping an OTN signal received from a circuit side into a synchronous transfer mode bus based on the system clock signal and the frame header indication signal to generate a synchronous transfer mode bus signal, and sending the synchronous transfer mode bus signal to the cross-connection unit;
• de-mapping a signal output by the cross-connection unit through the synchronous transfer mode bus to the OTN signal and sending the OTN signal to the circuit side.

A Synchronous Digital Hierarchy (SDH) signal interface processing unit, comprising one or more components for:

• synchronizing, based on a system clock signal and a frame header indication signal, an SDH signal received from a circuit side with a system clock and a frame header,
• adapting the synchronized SDH signal into a synchronous transfer mode bus to generate a synchronous transfer mode bus signal and sending the synchronous transfer mode bus signal;
• and
• restoring a signal of the synchronous transfer mode bus to the SDH signal and sending the SDH signal to the circuit side.