Lowering phone expense, Which VOIP do people on the forum use?

[Rajiv Vyas]

> I use Ekiga with a 3rd party VoIP provider called FreeCall.  Call
> rates are half of Skypes, and I find the call quality is much better.

Are you able to use regular phone with Ekiga and FreeCall set up? Do
you need the PC to be running?