X-VOW Features and requirements
System requirements
- A Windows 98/ME/NT/2000/XP based PC
- Internet connection with a minimum bandwidth of 56kbps (it may affect call quality)
- a full duplex sound card (for basic audio calls), equipped with headset (or speakerphone) and microphone
- a webcam (optional) for video calls
Client Features
- SIP signalling fully compliant with IETF RFC 3261:
- SIP registration
- SIP digest Authentication
- Basic SIP audio/video call establishment and management
- Outgoing call (dial, cancel and close)
- Incoming call (accept, refuse and close)
- Advanced SIP audio/video call management:
- Hold and resume
- Multimedia session modification (adding and removing media channels)
- NAT (Router) & firewall friendly
- Any user behind a NAT/router can place or receive calls without any network configuration, even if the other user is behind a NAT
- Automatic firewall/proxy detection
- Ability to place and receive calls through firewall/proxy, thanks to our Tunneling technology (TCP, HTTP and HTTPS)
- SDP mono/bidirectional and/or codec-asymmetrical negotiation (IETF RFC 2327, 3264)
- RTP/RTCP streaming (IETF RFC 1889)
- RTP Streaming via peer to peer or through Proxy
- In-band DTMF generation and detection (IETF RFC 2833)
- Supported audio codecs:
- G.711 A-Law, G.711 U-Law
- GSM 6.10
- iLBC
- G.729 (under royalty payment)
- G.723 (under royalty payment)
- VAD (Voice Activity Detection) feature
- Advanced Denoise Filtering feature
- Advanced Antijttering system
- Supported video codecs:
- H.261 QCIF, CIF
- H.263 QCIF, CIF
- Advanced dynamic video bitrate management to preserve audio quality
- Dynamic ordered codec list management
- Advanced audio and video codec configuration
- Advanced support for audio/video devices (or peripherals)
- High interoperability with major SIP clients and servers
- Royalty Free Licensing
- Microsoft Authenticode Certificate Signed package