A METHOD AND SYSTEM FOR REALIZING IP VOICE SERVICE AT PRIVATE NETWORK

摘要

The invention discloses a method and system for realizing IP voice service at network including private network established with NAT technology. Through increasing the number of address proxy servers and establishing TCP/UDP data link with address proxy server during PC client logon in private network, all channels required for communication between PC client and VoIP server are set up in advance during logon, which include call signaling channels and logical channels. The PCC private network addresses are replaced with source port of source address (public network address) obtained by apply the NAT conversion to each channel, in fact it serves as reservation of call signaling channel and logical channel (or voice channel), so as to realize application of VoIP service in network established with NAT technology.