I am new to Symbian and currently exploring SIP technology. Have been picking on the CSIPExample code (Nokia SIP Plug-in 3.0 for Series 60 Programmer's Guide.pdf) and so far had success only with REGISTER. I need clarification for
* Does the Nokia SIP stack support SIP Presence & Instant Messaging extensions like SUBSCRIBE, NOTIFY, MESSAGE..
* Help on how to proceed with data transmission (large and small data) between two user agents.
* Correlation of SDP with SIP.
* Does SIP provide a mechanism for multicasting messages?
Thanx in advance.