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 ...

RFC 4474 implements Public Key Infrastructure (PKI). This provides an authenticated identity for the originator of a VoIP call. There is a security hole in the SIP protocol. According to John Nix, VP, ...

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 ...