a manufacturers  of:

internal emergency dedicated communication systems for:

subway high-speed rail , highway tunnels

petrochemicals , metallurgical nuclear power

offshore engineering, bridges and mines, etc

PAGA broadcast dispatch, scenic area, airport tourist help management scheme, municipal SOS , 110,119 alarm system;

Special industrial IP telephone, SOS telephone, TR069 network management

R & D, production and sales of SIP dispatching system