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 ...

Switzerland-based O-FONE (not to be confused with Microsoft’s oPhone) has released a SIP VoIP client for Symbian’s S60 platform. Perhaps more interesting than the client itself is their claim that ...

SIP vs VoIP: what's the difference? If you’re setting up a new VoIP business phone system, this question will sound familiar. You've likely run into the acronyms SIP, or Session Initiation Protocol ...

TringMe, an Indian internet telephony firm, has released the first third-party native VoIP client for BlackBerry smartphones that does not require the use of voice minutes. Unveiled on Monday, the ...

Microsoft announced a comprehensive Windows® CE .NET-based voice over IP (VoIP) solution that enables the integration of voice communications into a variety of IP-based client devices and services ...

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 ...