Binary package “ekiga” in ubuntu precise
H.323 and SIP compatible VoIP client
H.323 and SIP compatible videoconferencing and VoIP/IP-Telephony application
that allows you to make audio and video calls to remote users with H.323
hardware or software (such as Microsoft Netmeeting) as well as SIP endpoints.
.
It supports all modern videoconferencing features, such as contact roster,
presence status, high-quality audio and video codecs, various video
resolutions, registering to an LDAP directory, gatekeeper support,
making multi-user conference calls using an external MCU, using modern
Quicknet telephony cards, and making PC-To-Phone calls.