Patent ID: 7298732

Claim:
A method for initializing an IP (Internet Protocol) phone in an IP telephony system including an IP network; at least one gatekeeper connected to the IP network, the gatekeeper having a DHCP (Dynamic Host Configuration Protocol) server and a TFTP (Trivial File Transfer Protocol) server; the IP phone connected to the gatekeeper for voice conmmunication service; and an AAA (Authentication, Authorization and Account) server for performing an authentication, authorization, and accounting of the IP phone, the method for initializing the IP phone comprising steps of: allowing the IP phone to access the DHCP server via a DHCP server IP address received from a user when the IP phone restarts and the IP phone does not detect its own terminal IP address and phone number, the DHCP server allocating a terminal IP address and a TFTP server IP address to the IP phone; allowing the IP phone to access the TFTP server via the TFTP server IP address, the TFTP server allocating subscriber information having a phone number of the IP phone and an IP address of the gatekeeper to the IP phone; allowing the IP phone to access the gatekeeper via the IP address of the gatekeeper, the IP phone transmitting a registration request signal to the gatekeeper; and allowing the gatekeeper to inform the AAA server of the subscriber information of the IP phone.