Like most people, I find myself using the same VoIP options everyone else is using. Thankfully, these days there are far more options available than what we might think.
One of the popular VoIP applications in Linux is Skype which coming from any other platforms, Linux VoIP clients often find themselves being compared to Skype. Foss advocates are usually quick to point out the flaws in trusting Skype with your voice calls, yet the fact is that this is what most people use. There are more than one alternative applications for VoIP communications in Linux.
Today, I’ll look at these options and also explore up-and-coming alternatives as well.
Source:http://www.datamation.com/open-source/state-of-voip-in-linux.html
Submitted by: Matt Hartley