A key telephone control system having a key telephone system for controlling an emergency telephone call between telephone sets

摘要

The present invention relates to an enhanced key phone control system (500) for controlling an emergency call between key telephone apparatuses to transmit an urgent message to a key telephone apparatus in a call, an emergency call is made to another key telephone apparatus requiring an emergency telephone call In response to a key input signal for an emergency call from the keypad 10 in order to make a telephone call with another key telephone set requiring an emergency telephone call, a keypad 110 comprising keys for performing an emergency call to make an emergency call, A key telephone (100) including a key telephone control unit (120) for generating a call control signal; A timer for generating a time signal at a reference time or a predetermined time interval; And a system control unit (230) for controlling the telephone communication session to be performed in response to the emergency call control signal from the key telephone control unit (120) via the extension line to a telephone key telephone requiring an emergency telephone call do.