Patent ID: 6760780
Filing Date: 2004-07-06
Classification: H04L,H04M

Abstract:
A method of proxying telephony messages, the method comprising:receiving a first call signaling message from a calling computer of a public network, the first call signaling message comprising an alias of a callee computer of a private network and a public network address of a proxy computer; determining from the alias which computer of the private network is the callee computer; generating a second call signaling message for performing the function of the first call signaling message on behalf of the calling computer, the second call signaling message comprising the alias and a private network address of the callee computer; sending the second call signaling message to the callee computer; receiving a first outbound call signaling message from the callee computer, the first outbound call signaling message comprising a first port assignment for the transmission of call control messages between the callee computer and the proxy computer; generating a second outbound call signaling message for performing the function of the first outbound call signaling message, the second outbound call signaling message comprising a port assignment for the transmission of call control messages between the proxy computer and the calling computer; and sending the second outbound call signaling message to the calling computer.