SIP(Session Initiation Protocol is a new internet, multimedia and communication protocol and used to build Multiparty Multimedia Communications system. Recently, SIP for Internet Telephony applications are booming.

CCL SIP Protocol stack can be applied to IP-PBX, Softswitch or signal call control in 3G.

CCL SIP Proxy server also provides location based service; authentication, and registration.

VoIP Devices, SIP message Control.

• IETF RFC 3261 (SIP: Session Initiation Protocol).
• Provide C++ expanding capability
• Support Stateful and Stateless two modes
• Support Registration function of terminal facility (Terminals, e.g. SIP User Agent)(Registration)
• With TCP and UDP two way transportations.
• Support Microsoft Windows 2000/x86Platform
• Support SUN Solaris 8/Sparc Platform
• Support Red Hat Linux 6.2/x86Platform

• Peer to peer VoIP Structure.
• Pass International Interoperability tests

• Experienced on internet knowledge
• With C++ programming capability