Patent ID: 7103032
Filing Date: 2006-09-05
Classification: H04L,H04M

Abstract:
1. A telephone controller controlling a plurality of telephones connected to the Internet via a LAN (Local Area Network), said telephone controller allowing an external telephone connected to the Internet to make a direct call to a telephone in the LAN comprising: an IP (Internet Protocol) address allocating circuit which allocates a private IP address to each of the plurality of telephones; a memory in which a table indicating a correspondence between IDs (Identifier) of the plurality of telephones and corresponding ones of the private IP addresses is stored; and a control circuit which controls communication between the plurality of telephones and the Internet using the private IP addresses, wherein each of the IDs includes a global domain name registered on the Internet of said telephone controller and identification information composed of a user name and an extension telephone number of the telephone, wherein said memory further stores therein a table indicating a correspondence among an ID, a private IP address, an extension telephone number, and a user name, and wherein said control circuit, in response to a registration request message including one of said IDs, extracts the identification information from said one of said IDs received via the Internet, searches said table with the identification information to obtain the private IP address, and executes communication between a telephone to which the private IP address is allocated and the Internet.