IP telephone system

An IP telephone system comprising:

• a main control device for performing a centralized control and of all IP terminals;
• an IP exchange comprising a plurality of signal control devices for supervising and storing said IP terminal for each lodgment through the circuit by a control of said main control device;
• said circuit connecting between said IP exchange and said lodgment;
• a back up exchange for detecting a trouble of said IP exchange or a fault of said circuit and backing up said lodgment;
• and a plurality of said lodgments comprising a plurality of IP terminals,
• wherein said backup exchange performs an access confirmation with said IP exchange in a waiting state, and comprises the actuation sequence to switch over to an operating state in case the access confirmation cannot be secured from said IP exchange.

An IP telephone system comprising:

• a main control device for performing a centralized control of all IP terminals;
• an IP exchange comprising a plurality of signal control devices for supervising and storing said IP terminals for each lodgment through the circuit by a control of said main control device;
• said circuit connecting between said IP exchange and said lodgment;
• a back up exchange for detecting a trouble of said IP exchange or a fault of said circuit and backing up said lodgment;
• and a plurality of said lodgments comprising a plurality of IP terminals,
• wherein said IP exchange designates said lodgment and selectively transmits an unicast message of a common order.

An IP telephone system configured by a main control device for controlling the entire operation of an IP exchange;

• said IP exchange of a center comprising a plurality of signal control devices storing a plurality of IP terminals for each lodgment through a circuit by a control of said main control device and
• comprising a plurality of signal control devices performing a call control;
• said circuit for connecting between said IP exchange and said lodgment;
• a backup exchange for detecting a trouble of said IP exchange or a fault of said circuit and backing up said lodgment;
• and said plurality of lodgments comprising said plurality of IP terminals, said IP telephone system performing a centralized control and operation of all the IP terminals by the IP exchange,
• wherein said main control device installs IP addresses in said plurality of signal control devices, and in case a trouble is developed in one set signal control device, changes the IP address of a spare signal control device to the IP address of the signal control device in which the trouble is developed, and performs a control of switching over the signal control device in which the trouble is developed to the spare signal control device.

An IP telephone system configured by a main control device for controlling the entire operation of an IP exchange;

• said IP exchange of a center comprising a plurality of signal control devices storing a plurality of IP terminals for each lodgment through a circuit by a control of said main control device and
• comprising a plurality of signal control devices performing a call control;
• said circuit for connecting between said IP exchange and said lodgment;
• a backup exchange for detecting a trouble of said IP exchange or a fault of said circuit and backing up said lodgment;
• and said plurality of lodgments comprising said plurality of IP terminals, said IP telephone system performing a centralized control and operation of all the IP terminals by the IP exchange,
• wherein said circuit comprises the circuits of two systems, and said signal control device comprises LAN ports of two-system corresponding and connected to said circuits of two-system, and in case one of LAN ports of said two system develops a trouble during actuation, the signal control device operates by switching over to the other LAN port.

An IP telephone system configured by a main control device for controlling the entire operation of an IP exchange;

• said IP exchange of a center comprising a plurality of signal control devices storing a plurality of IP terminals for each lodgment through a circuit by a control of said main control device and
• comprising a plurality of signal control devices performing a call control;
• said circuit for connecting between said IP exchange and said lodgment;
• a backup exchange for detecting a trouble of said IP exchange or a fault of said circuit and backing up said lodgment;
• and said plurality of lodgments comprising said plurality of IP terminals, said IP telephone system performing a centralized control and operation of all the IP terminals by the IP exchange,
• wherein said signal control device comprises a spare signal control device not storing said plurality of IP terminals for said each lodgment.