linphone

Linphone is an internet phone or Voice Over IP phone (VoIP).

* With linphone you can communicate freely with people over the internet, with voice, video, and text instant messaging.
* Linphone complies to the SIP protocol, an open standart for internet telephony. Linphone should be able to interoperate with most SIP-compatible phones and proxies.
* If you subscribe a VoIP to PSTN (=classic telephony) account to a telecom provider, you can reach everyone that has a "classic" phone line. However those calls are not free since PSTN networks are costly.
* linphone is free-software (or open-source), you can download and redistribute it freely.
* linphone works under Linux and Windows XP

好像是一個不錯的東西，還可以在windows xp上跑哩~

還沒有安裝完成，但是，至少有下面幾個套件需要安裝
sudo apt-get install libsdl1.2-dev
sudo apt-get install libexosip2-dev
sudo apt-get install libosip2-dev
sudo apt-get install libglade2-dev
sudo apt-get install intltool

linphone主網頁