KEY TELEPHONE, MOBILE TELEPHONE, KEY TELEPHONE SYSTEM, CORDLESS TELEPHONE SYSTEM, COMMUNICATING METHOD OF KEY TELEPHONE SYSTEM, COMMUNICATING METHOD OF CORDLESS TELEPHONE SYSTEM AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a key telephone capable of notifying the effect of an emergency call to a calling destination telephone by calling different from that at a normal time when the key telephone is emergency called, mobile telephone, key telephone system, cordless telephone system, a method for communicating a key telephone system, a method for communicating a cordless telephone system and a recording medium. SOLUTION: The calling-out key telephone accepts an input including an emergency call command, and transmits an emergency call signal to a key telephone apparatus via a key telephone apparatus interface means by a control means. The telephone apparatus designates a calling destination key telephone based on a received call signal by a main control means, and transmits the call signal. The calling-in key telephone determines whether the received call signal is the emergency call signal including the emergency call command or not by the control means, and informs the effect of the emergency by a notifying means when the call signal is determined as the emergency call signal.