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 ...

Emmanuel Proulx is a SIP (Session Initiation Protocol) developer who has written an excellent tutorial on the signaling protocol that is widely used in VoIP to initiate communications sessions between ...

Session Initiation Protocol (SIP) is a control (signaling) protocol developed by the Internet Engineering Task Force (IETF) to manage interactive multimedia IP sessions including IP telephony, ...

Always wanted to try watercolour but didn’t know where to start? Here’s your chance to dive in and experience the magic of painting in a fun, relaxed environment—complete with a glass of wine to keep ...

In Part 1 of our SIP primer, I covered the SIP foundation layers starting from the message structure and ending with the SIP transactions. We saw how phone registrations and proxies could work using ...