COMMUNICATION CONTROL DEVICE FOR INTERPHONE AND THE INTERPHONE

摘要

An interphone has an interphone operation unit (102), an interphone transmitter/receiver (50), and a communication control unit (101) for connecting the interphone operation unit (102) to a telephone circuit. The interphone operation unit (102) and the interphone transmitter/receiver (50) are separately connected to the communication control unit (101), and the communication control unit (101) switches a connection between the connection made between the interphone operation unit (102) and the interphone transmitter/receiver (50) and that made between the interphone operation unit (102) and the telephone circuit.