Item No.: YT-SDN03
YT-SD03/SIP tunnel emergency telephone and broadcasting system is with intercom, broadcasting, music, scheduling and alarm functions. It adopts the leading network audio technology to convert analog audio signals into digital signals in the form of network data packets on the transmission network Two-way transmission. It is a set of pure digital transmission tunnel emergency telephone broadcasting system having solved the problems existing in the traditional emergency telephone system which can not be multi-level management, easy to be disturbed, poor stability, not clear voice effect, the simple function and other problems.