"VidPhone" is a H.323/SIP Video SoftPhone for Windows and Linux OS.
VidPhone support both SIP and H.323 protocols, varios audio codecs and high-definition video.

VidPhone has following features and parameters:

• Protocols: SIP and H.323
• Audio codecs: G.711/G.729/Speex/iLBC/G.723.1/GSM/G.726
• Video codecs: H.261/H.263/H.264
• Supported video resolutions: SQCIF(128x96), QCIF(176x144), CIF(352x288), 4CIF(704x576), 16CIF(1408x1152), 320x240, 640x480, 720x480, 1080x720 (HD)
• Operating system: Windows, Linux, FreeBSD
• Compatibility: Asterisk, SIP Expreee Router (SER/OpenSER), Kamaillo, Cisco, Alcatel-Lucent and others
• Additional SIP features: SIP Registrar/Proxy, SIP over TCP, SIP over UDP, SIPS (encrypted SIP), SIMPLE (SIP Presence),SIP messaging
• Additional H.323 features: H.323 Gatekeeper/Gateway, FastStart. H.245 Tunneling, H.235, H.323s (encrypted)
• Additional features: SRTP, STUN, FAX (T.38), basic IVR to handle incoming calls

Click here to download demo version