The client can be used to connect to any SIP or IMS network from your preferred browser to make and receive audio/video calls and instant messages.
The Session Description Protocol (SDP) is a format for describing streaming media initialization parameters. SDP is intended for describing multimedia communication sessions for the purposes of session announcement, session invitation, and parameter negotiation. SDP does not deliver media itself but is used for negotiation between end points of media type, format, and all associated properties. The set of properties and parameters are often called a session profile. SDP is designed to be extensible to support new media types and formats.
The SIP protocol is an Application Layer protocol designed to be independent of the underlying Transport Layer; it can run on Transmission Control Protocol (TCP), User Datagram Protocol (UDP), or Stream Control Transmission Protocol (SCTP) It is a text-based protocol, incorporating many elements of the Hypertext Transfer Protocol (HTTP) and the Simple Mail Transfer Protocol (SMTP).
New features are :
- Audio / Video call
- Instant messaging
- Presence
- Call Hold / Resume
- Explicit Call transfer
- Multi-line and multi-account
- Dual-tone multi-frequency signaling (DTMF) using SIP INFO
For more information, please visit : http://code.google.com/p/sipml5/
