Last March, Steve Jobs opened the door to iPhone VoIP applications. They had to run over WiFi and couldn't burden AT&T's cellular data network. Now just a few months after the App Store made its debut ...

If you've been looking around for a solid VoIP/SIP client for the iPad or iPhone, consider CounterPath's Bria. The three most important considerations for any softphone app are call quality; call ...

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 ...

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 ...

While many carriers offer centralized SIP, how they account for sessions across your enterprise and the terms they use are not consistent across the industry. Every year we speak with many potential ...

The iPhone app Fring--which acts as a VoIP client for Skype and other Internet phone networks, as well as a voice and chat interface into IM networks like AIM and Yahoo--is now available for free to ...

Got an iPod touch? And some audio input hardware? Want to make some VoIP calls? If you answered yes to all of the above, you'll want to check out the Touchmods site later tonight, when they'll ...