Patent ID: 7952995
Filing Date: 2011-05-31
Classification: H04L,H04M

Abstract:
1. A system to provide Voice over Internet Protocol (VoIP) service, the system comprising: a plurality of Internet Protocol (IP) terminals connected to a network, at least one of said plurality of IP terminals to generate a test message and to provide the test message to the network, the test message comprising port information used when receiving and transmitting packets; and a switching system to store and manage the port information of the at least one IP terminal provided by the test message, to transmit port information of one of a transmitting IP terminal and a receiving IP terminal if VoIP service for the receiving IP terminal in a private network is requested, and to allow each of the plurality of IP terminals to receive and transmit the packets using the transmitted port information, wherein the stored port information comprises port information corresponding to a port used for exchanging voice packets and port information corresponding to a port used for exchanging signaling packets, and wherein the switching system comprises: wherein no portion of the test message is transmitted by the switching system.