Private branch exchange, private branch exchange system, and terminal unit registration method

A private branch exchange system in which a plurality of terminal units are connected to one or a plurality of private branch exchanges over a network,

• the private branch exchange including:
• a communicator connected to a plurality of terminal units and a plurality of private branch exchanges;
• a memory which stores identity information of the plurality of terminal units and communicating information of the plurality of terminal units;
• and
• a controller which controls processing of the private branch exchange, and
• the terminal unit including:
• a terminal communicator connected to one or a plurality of terminal units and a plurality of private branch exchanges;
• a terminal memory which stores terminal unit identity information of the terminal unit and terminal communicating information of the private branch exchange;
• and
• a terminal unit controller which controls processing of the terminal unit;
• wherein terminal unit identity information that inquires about the communicating information of the private branch exchange to be an registration destination is broadcast-transmitted from the terminal unit newly connected to the network
• wherein, if the communicating information or the terminal communicating information corresponding to the terminal unit identity information is in the memory or the terminal memory, either the private branch exchange or the terminal unit which has received the terminal unit identity information, broadcast-transmits the communicating information or the terminal communicating information of the private branch exchange as the registration destination to the plurality of terminal units and the plurality of private branch exchanges.

A terminal unit registration method of a private branch exchange system in which a plurality of terminal units are connected to one or a plurality of private branch exchanges over a network,

• the private branch exchange including:
• a communicator connected to a plurality of terminal units and a plurality of private branch exchanges;
• a memory which stores identity information of the plurality of terminal units and communicating information of the plurality of terminal units;
• and
• a controller which controls processing of the private branch exchange, and
• the terminal unit including:
• a terminal communicator connected to one or a plurality of terminal units and a plurality of private branch exchanges;
• a terminal memory which stores terminal unit identity information of the terminal unit and terminal communicating information of the private branch exchange;
• and
• a terminal unit controller which controls processing of the terminal unit;
• the method comprising:
• an address request step of broadcast-transmitting terminal unit identity information that inquires about the communicating information of the private branch exchange to be an registration destination is from the terminal unit newly connected to the network, and
• an address response step in which, if the communicating information or the terminal communicating information corresponding to the terminal unit identity information is in the memory or the terminal memory, either the private branch exchange or the terminal unit which has received the terminal unit identity information broadcast-transmits the communicating information or the terminal communicating information of the private branch exchange as the registration destination to the plurality of terminal units and the plurality of private branch exchanges.