Update: this post contains corrected information, based on additional data sent to us by Keynote Systems. Keynote Systems is out with a five-week study that claims VoIP reliability and audio quality ...

One of the big advantages of VoIP vs. PSTN voice is VoIP’s capability to offer high definition or wideband voice– providing a fuller and richer sound quality that is similar to the leap made between ...

Today, we’d like to get back to a few basics about the relationship between the public-switched telephone network and voice over IP. The PSTN includes a signaling system, a series of central offices ...

Last week I wrote about the technical aspects of dial-out to PSTN phones, now I would like to take a look at the costs of such calls. Of course, these vary widely based on where you are calling to, ...

Vodafone will shift its consumer customers with fixed network phone services to VoIP services and for business customers is launching what it says is a refreshed voice calling and internet service ...