Finally: PC-to-Phone Calling from Linux
Greg Herlein writes "There is finally a way to do direct PC to Phone calling from linux: GnomeMeeting
now supports decent quality, low-cost VoIP calls to any real phone in the world. It's about time." The calls are through a company called MicroTelco; read this FAQ page to learn more about it. (And don't forget TheKompany's approach to IP-telephony-with-Linux, using a Sharp Zaurus plus Net2Phone.)
It worls, many people are doing Netmeeting-GnomeMeeting calls every day. Perhaps you are simply not ready to use Linux yet.