Being GTK based, it comes with a simple GUI and even if you're really new to VOIP software , yet it won't take more than few minutes to get used to it.
Let's have a look at the main features of SFLPhone...
*. Unlimited simultaneous lines - Unless you pay, in Skype you can't call (conference) with more than 3 connections at a time.
*. Call recorder.
*. Video and audio calls.
*. Directly peer to peer calls (no third party servers necessary unlike with Skype).
*. Both Gnome and KDE bindings.
*. Set up wizard and desktop notifications (you know setting ring tones or conventional "tool-tip" type notifications).
*. Few language support.
*. Alsa and Pulse audio support.
are just a few to mention. But remember, if you want to make calls, then you have to have a SFLphone installed on the other-end as well So, if you're impressed with it, and want to know how to install it in Ubuntu using PPA, this is how you do it.
Open your terminal and issue the following command...
sudo add-apt-repository ppa:savoirfairelinux
sudo apt-get update
sudo apt-get install sflphone-client-gnome
For more information, please visit this official SFLPhone site.