Intercom system

An intercommunication system which is used m a building complex comprising plural buildings, each of the plural buildings comprising:

• room parent devices installed in respective rooms;
• a terminal device which enables a call manipulation for calling one of the room parent devices;
• and
• a building control unit, which connects the terminal device and the room parent devices of the respective rooms of the building, wherein
• the terminal device comprises a storage unit which is stored with device call table with information common to the terminal device of each of the plural buildings;
• and
• the building control units of the plural respective buildings each comprise a building controller and are connected to each other by a network in which a communication is performed according to a general-purpose protocol and can communicate, over the network, with an external apparatus that is connected to an external network,
• wherein the building controller has a building storage unit which is stored with building terminal information that is a combination of pieces of terminal information stored in the storage units of the plural respective terminal devices in the at least one building,
• wherein the pieces of terminal information include one or more residents' names with associated room parent identification information,
• wherein the building controller comprises a forming unit which forms the building terminal information by acquiring the pieces of terminal information including the one or more residents' names with the associated room parent identification information from the plural terminal devices that are installed in the building where the building controller is installed and are connected to the building controller.

A method for establishing an intercommunication system for a building complex comprising plural buildings, the method comprising:

• installing room parent devices in each of the plural buildings in respective rooms;
• installing a terminal device in the each of the plural buildings which enables a call manipulation for calling one of the room parent devices;
• installing a building control unit comprising a building controller for the each of the plural buildings, which connects the terminal device and the room parent devices of the respective rooms of the building;
• storing a storage unit of the terminal device with device call table with information common to the terminal device of each of the plural buildings;
• connecting the building control units of the plural respective buildings to each other by a network in which a communication is performed according to a general-purpose protocol and can communicate, over the network, with an external apparatus that is connected to an external network;
• storing in a building, storage unit of the building controller building terminal information that is a combination of pieces of terminal information stored in the storage units of the plural respective terminal devices in the at least one building,
• wherein the pieces of terminal information include one or more residents' names with associated room parent identification information;
• and
• forming the building terminal information via the building controller by acquiring the pieces of terminal information including the one or more residents' names with the associated room parent identification information from the plural terminal devices that are installed in the building where the building controller is installed and are connected to the building controller.