Multifunctional relay protection signal remote transmission channel switch apparatus

A multifunctional relay protection signal remote transmission channel switch apparatus is characterized in that the apparatus comprises a relay protection signal interface module, an SDH (Synchronous Digital Hierarchy) service 2M channel interface module, an optical fiber channel interface module, a channel signal monitoring and analyzing module, a channel selection module, a communication line cache clock extraction module, a cache alignment module, a nondestructive switch module, and an equipment management and network management module, wherein the relay protection signal interface module is connected with the communication line cache lock extraction module and the channel signal monitoring and analyzing module; and the channel signal monitoring and analyzing module is connected with the equipment management and network management module. The multifunctional relay protection signal remote transmission channel switch apparatus solves the problem of double data transmission manners of the relay protection equipment, and the knotty problem of full-range channel synchronization in the double channel design.