Telephone controller for VoIP

摘要

A telephone controller according controls a plurality of telephones connected to the Internet via a LAN. The telephone controller includes an IP address allocating circuit which allocates a private IP address to each of the telephones. A memory in the controller stores a table indicating a correspondence between IDs of the plurality of telephones and the private IP addresses. A control circuit controls communication between the plurality of telephones and the Internet using the private IP addresses, where the ID includes a domain name of the telephone controller and identification information.