PURPOSE: To obtain the system of a new form while integrating a telephone system and a security system by adding a function as a private branch of exchange to a system having a security function and an interphone function.
CONSTITUTION: A telephone controller provided with a private branch of exchange section is added to a security system. A detection section from sensors 11-13 for smoke and gas or the like is received by a reception section of a security unit 10 and sent to a display section 17 and a speaker, from which an alarm tone is sounded and also sounded from a doorphone slave set 14 and an auxiliary acoustic device 16 and a signal is sent succeedingly to a telephone controller 20. The controller 20 sends a signal to a master set 50 via a central controller 40 to control the talking thereby allowing an extension telephone set to call at alarming forcibly. On the other hand, the master set 50 and a sub-display device 30 output a display and an alarm sound. Thus, the system integrating the security function, the interphone function and the private branch exchange function is built up.
YOSHIKAWA CHIAKI
MITSUSE MOTOHARU
