Patent ID: 7391762

Claim:
A call processing message converting method in an Internet Protocol-private automatic branch exchange (IP-PBX) system including: a hub connected to an Internet Protocol network; at least one Internet Protocol terminal, connected to a local area network communication port of a hub, to perform a voice over Internet Protocol function conforming to a data communication Protocol procedure; the Internet Protocol driver, connected to the local area network communication port of the hub, to control Internet Protocol endpoints; and an Internet Protocol-private automatic branch exchange, connected to the local area network communication port of the hub, to conduct call processing services, the method comprising: receiving an Admission Request (ARQ) message including its own port information and another party's telephone number from an originating Internet Protocol terminal; sending an ARQ request message to the IP-PBX, the ARQ request message converted to a format recognized by the Internet Protocol-private automatic branch exchange; receiving a seizing message corresponding to the ARQ request message from the Internet Protocol-private automatic branch exchange, and sending an admission confirm message to the originating Internet Protocol terminal in response to the seizing message; sending a setup message from the originating Internet Protocol terminal to a terminating Internet Protocol terminal, and simultaneously sending a setup response message to the originating Internet Protocol terminal; sending the admission confirm message to the terminal Internet Protocol terminal in response to the admission request message from the originating Internet Protocol terminal, sending an alert message from the terminating Internet Protocol terminal to the originating Internet Protocol terminal, and sending a system identification information to the Internet Protocol-private automatic branch exchange; and forming an Internet Protocol channel between the originating and terminating Internet Protocol terminals by sending a connect message from the terminating Internet Protocol terminal to the originating Internet Protocol terminal and by sending polarity to the Internet Protocol-private automatic branch exchange.