METHOD FOR OPERATING A TELEPHONE SYSTEM WITH AT LEAST TWO TELEPHONY TERMINALS, AND TELEPHONY TERMINAL FOR CARRYING OUT THE METHOD

摘要

A telephone network system having an action key performing a telephone network system method of the special functions is provided to transmit functional data performing the special function of the telephone network system. A telephone network system(1) comprises first or third telephone terminal. The functional data performing the special function of the telephone network system is transmitted to telephone terminals besides audio data or user data. The action key of the first telephone terminal is allocated to the special function according to the state of the second telephone terminal allocated to the state or the first telephone terminal. The call connection between the first and second telephone terminals are performed by the action key.