Patent ID: 7536463

Claim:
A terminal registration method using a session initiation protocol, comprising: transmitting a media access control address to a session initiation protocol server by a terminal in a voice over Internet protocol system including the terminal and the session initiation protocol server; retrieving a database comprising terminal information for the terminal in accordance with the media access control address, and transmitting to the terminal, from the session initiation protocol server receiving the media access control address from the terminal, the terminal information for the terminal in accordance with the received media access control address; transmitting to the session initiation protocol server, from the terminal, a register message including the obtained terminal information and including a first predetermined value assigned to a field value of a telephone number field; retrieving the database, and transmitting to the terminal, from the session initiation protocol sever receiving, from the terminal, the register message including the terminal information and including the first predetermined value assigned to the field value of the telephone number field, a second field value of the telephone number field and user registration information in accordance with the terminal information received from the terminal; requesting, at the terminal, the session initiation protocol server to perform registration by using the user registration information received by the terminal; performing the registration of the terminal, and transmitting to the terminal, from the session initiation protocol server receiving, from the terminal, a registration request signal including the user registration information, a registration success message; and the steps of retrieving the database, and transmitting the user registration information further comprising the sub-steps of: parsing the register message, and requesting a location server, at the session initiation protocol server receiving, from the terminal, the register message including the terminal information and including the first predetermined value, to transmit the user registration information in accordance with the terminal information; retrieving the database, and transmitting to the session initiation protocol server, at the location server requested by the session initiation protocol server to transmit the user registration information, the user registration information in accordance with the terminal information; and transmitting to the terminal, from the session initiation protocol server receiving, from the location server, the user registration information, the received user registration information.