In our last VoIP installment, we looked at the main reasons why SIP has become a widely adopted protocol, but we left details of the protocol's inner workings fairly vague. This article will drill ...

Part 1 focused on the SIP foundations and showed the protocol's simplicity. Part 2 has described the more complex areas of SIP that require more attention to detail.

SIP is the Session Initiation Protocol. In IP and traditional telephony, network engineers have always made a clear distinction between two different phases of a voice call. The first phase is ...

SIP and SIP servlets are also important in the enterprise. Combined with Java EE technology, SIP servlets can be used to add rich media interactions to enterprise applications.

SIP is a protocol similar to HTTP that merely defines how two end-points find one another and exchange the information necessary to establish a session.