Method for initializing internet protocol phone in internet protocol telephony system

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 communication 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 gatekeeper to transmit a restart message to the IP phone when the gatekeeper restarts;
• 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.

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 communication 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:
• transmitting subscriber information from the AAA server to the gatekeeper when the telephone number of the IP phone is changed and allowing the gatekeeper to transmit a restart message to the IP phone 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.

An IP (Internet Protocol) telephony system comprising

• 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;
• an IP phone connected to the gatekeeper for voice communication service;
• and
• an AAA (Authentication, Authorization and Account) server for performing an authentication, authorization, and accounting of the IP phone;
• said IP phone accessing the DHCP server in response to a DHCP server IP address input by a user of the IP phone when the IP phone restarts and the IP phone does not detect its own terminal IP address and phone number;
• said DHCP server allocating a terminal IP address and a TFTP server IP address to the IP phone when said IP phone accesses the DHCP server in response to the DHCP server IP address input by the user;
• said IP phone accessing the-TFTP server in response to the TFTP server IP address;
• said TFTP server allocating subscriber information having a phone number of the IP phone and an IP address of the gatekeeper to the IP phone when said IP phone accesses the TFTP server;
• said IP phone accessing the gatekeeper in response to the IP address of the gatekeeper, the IP phone transmitting a registration request signal to the gatekeeper;
• and
• said gatekeeper informing the AAA server of the subscriber information of the IP phone.