TELEPHONE SYSTEM AND GATEWAY DEVICE

• US 20080247404A1
• Filed: 03/14/2008
• Published: 10/09/2008
• Est. Priority Date: 04/03/2007
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Yamazaki, Atsushi
• Application Number:
  US12/048,800
• Publication Number:
  US 20080247404A1
• Time in Patent Office: Days
• US Class Current: 370/401
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Abstract

According to one embodiment, a gateway connects a plurality of telephones to a packet network including a server processes calls using address information, includes a registration processor requires registrations of a plurality of items of address information to be used for call origination to packet network, a table records the plurality of items of address information and results of registrations for each item of address information in packet network, a selection processor confirms the results of the registrations of the address information included in the notified request message from a transmitting origin telephone by referring to the table and selects another item of address information if the relevant address information has not been registered, and a call controller sends a message including address information if the address information included in the request message has been registered, and otherwise, including another information selected from the selection processor to the server.

Claims

1. A telephone system which achieves a voice communication by using a packet communication network, comprising

a private branch exchange which accommodates a plurality of telephone terminals;

a gateway device which connects the plurality of telephone terminals to the packet communication network via the private branch exchange; and

a call processing server which processes calls among the telephone terminals and the packet communication network on the basis of address information to be use in the packet communication network, wherein

the exchange includes a notification processing unit which notifies an origination request message including address information corresponding to a telephone terminal that is a transmitting origin to the gateway device when an origination request from telephone terminals under its own control to the packet communication network;

the gateway device comprises;

a registration processing unit which requires registrations of a plurality of items of address information to be used for call origination to the packet communication network;

a registration management table which records the plurality of items of address information and results of registrations in the packet communication network for each item of address information;

a selection processing unit which confirms the results of the registrations of the address information included in the notified origination request message in the packet communication network by referring to the registration management table and selects another item of address information from the registration management table if the relevant address information has not been registered in the packet communication network; and

a call control unit which sends a call connection request message including address information if the address information included in the origination request message has been registered in the packet communication network, and otherwise, including another item of the information selected from the selection processing unit to the call processing server.

2. The telephone system according to claim 1, wherein the selection processing unit selects a specified item of address information as the other item of address information.

3. The telephone system according to claim 1, wherein

the plurality of items of address information are divided into a plurality of groups in the registration management table;

and

the selection processing unit selects the other item of address information among address information belonging to the same group as that of the telephone terminal of the transmitting origin.

4. The telephone system according to claim 1, wherein

the packet communication network is an Internet protocol network which can use a session initiation protocol;

and

the address information is an session initiation protocol uniform resource identifier to be used in accordance with the session initiation protocol.

8. The gateway device according to claim 1, wherein

the packet communication network is an Internet protocol network which can use a session initiation protocol;

and

the address information is an session initiation protocol uniform resource identifier to be used for the session initiation protocol.

5. A gateway device which connects a plurality of telephone terminals to a packet communication network including a call processing server which processes calls on the basis of address information, comprising:

a registration processing unit which requires registrations of a plurality of items of address information to be used for call origination to the packet communication network;

a registration management table which records the plurality of items of address information and results of registrations for each item of address information in the packet communication network;

a selection processing unit which confirms the results of the registrations of the address information included in the notified origination request message from a telephone terminal that is a transmitting origin in the packet communication network by referring to the registration management table and selects another item of address information from the registration management table if the relevant address information has not been registered in the packet communication network; and

a call control unit which sends a call connection request message including address information if the address information included in the origination request message has been registered in the packet communication network, and otherwise, including another information selected from the selection processing unit to the call processing server.

6. The gateway device according to claim 5, wherein the selection processing unit selects a specified item of address information as the other item of address information.

7. The gateway device according to claim 5, wherein

the plurality of items of address information are divided into a plurality of groups in the registration management table;

and

the selection processing unit selects the other item of address information among address information belonging to the same group as that of the telephone terminal of the origination terminal.