KphoneSI (kpsi) is a SIP (Session Initiation Protocol) user agent

for Linux, with which you can initiate VoIP (Voice over IP) connections

over the Internet, send Instant Messages, subscribe your friends

presence information and start other applications of your choice

-KphoneSI (kpsi) is a SIP (Session Initiati on Protocol) user agent for Linux, with which you can initiate VoIP (Voice over IP) connections over the Internet, send Instant Messages. subscribe your friends a presence information nd start other applications of your choice