Patent ID: 8340089
Filing Date: 2012-12-25
Classification: H04L,H04M

Abstract:
1. A method of data transfer for a voice over Internet protocol (VoIP) call, the method comprising: comparing an Internet protocol (IP) address of a recipient terminal in an invite message for session connection with an Internet protocol (IP) address of a VoIP gateway, the invite message being transmitted from a transmitter terminal to the VoIP gateway; upon determination that the Internet protocol (IP) address of the recipient terminal and the Internet protocol (IP) address of the VoIP gateway are the same, converting Internet protocol (IP) addresses and port information of the transmitter terminal and the recipient terminal included in the invite message to internal Internet protocol (IP) addresses and internal port information of the transmitter terminal and the recipient terminal to generate a converted invite message for session connection; transferring the converted invite message for session connection to the recipient terminal; and transferring a response message to the transmitter terminal to set a session, the response message comprising the internal Internet protocol (IP) address and the internal port information of the transmitter terminal.