Key telephone system, control method, terminal, and program

A control method of a key telephone system including a terminal and a primary device connected to each other with a wire-line for mutual IP communication, characterized in that the method comprises;

• a step of transmitting, in the primary device, a command for transition into a power-saving state to the terminal, together with a power-saving duration time datum that is a datum showing a power-saving duration time as a time period for continuing the power-saving state and/or a power-saving deactivating time datum that is a datum showing a power-saving deactivating time as a time for transition from the power-saving state into an operating state, when the time reaches a power-saving state transition time that is a time for transition into the power-saving state which is a state of further reduced power consumption;
• a step of specifying the power-saving duration time and/or the power-saving deactivating time in the timekeeper means for measuring a lapse of time specified and/or measuring the time, and halting the communication means for communicating with the primary device, in the terminal, at the time of receiving the command for transition into the power-saving state together with the power-saving duration time datum and/or the power-saving deactivating time datum from the primary device, and
• a step of activating the communication means being halted, in the terminal, at a time when the timekeeper means has measured the lapse of the power-saving duration time and/or the power-saving deactivating time.

A control method of a terminal connected with a primary device by way of a wire-line, and included in a key telephone system in which mutual IP communication is carried out between the terminal and the primary device;

• the terminal comprising a communication means for communicating with the primary device, and a timekeeper means for measuring a lapse of time specified;
• characterized in that the control method comprises;
• a step of specifying a power-saving duration time and/or a power-saving deactivating time in the timekeeper means, and halting the communication means, at a time of receiving a command for transition into a power-saving state from the primary device, together with a power-saving duration time datum that is a datum showing the power-saving duration time as a time period for continuing the power-saving state and/or a power-saving deactivating time datum that is a datum showing a power-saving deactivating time as a time for transition from the power-saving state into an operating state, in which power consumption is further reduced from an operating state, and
• a step of activating the communication means being halted, at a time when the timekeeper means has measured the lapse of the power-saving duration time and/or the power-saving deactivating time.