For all the technology behind Voice over IP (VoIP), you'd expect that it would work on every network, but this unfortunately isn't the case. Network Address Translation (NAT) is a common practice used ...

The session initiation protocol (SIP) is one of the most popular signaling protocols used in applications that require a session setup and parameter negotiation before actual communication, as well as ...

The article says that despite the large number of VoIP and PBX devices said to support Exchange Server 2007, getting some of them to work with the new Exchange isn’t a cakewalk. A SIP gateway is ...