TETRA Digital Trunking System Switching Site with Different Leakage Coaxial Cable Connected Type in the Tunnel Center

Voice communication is one of the Digital Trunking System main functions in Metro dispatch field,and voice quality plays a key roll in the service benchmark system.In voice service,one of the most important factors is the smooth switchover which provides the system with good roaming service.In Metro RF system where leakage coaxial cable is always implemented,the cable connected type in tunnel center is the key to smooth switchover or roaming,good design will lead to good coverage and convenient roaming,which system engineers pay great attention to.