How to distinguish the VOIP network gateway with the common voice chatting user
SIG through statistical the RTP connections to judge whether it is VOIP network gateway. The normal users carry on the common voice chatting and media communicating, need to establish no more than three RTP connections. But the virtual VOIP operated network gateway existed lots of connections at the same time. The live network testing data indicated: the RTP connections of many virtual operator’s network gateway are more than a thousand.