Hello,I would like to develop a project that will allow me to: - voice, video, screen sharing, etc. sessions with content communication via RTP - end to end presence – this is purely SIP routing - SIMPLE-based presence (aka, presence server or presence agent model) via presence* and pua* modules — user presence, dialog states notification (aka, blinking lamps), resource lists service (including OMA/RCS extensions), user location states notification and replication, audio/video conference mixer notifications, a.s.o. - embedded XCAP server – management of user contact lists, presence policies, user agent configuration files, a.s.o. There is also an XCAP client extension - embedded HTTP server – for admin and user interaction with the service via pure HTTP or XMLRPC requests - embedded MSRP relay – for relaying and fine controlling of the message-based content of SIP sessions - IRC-style instant messaging conference via imc module - storage of instant messages for offline users and relay to them when they become again online via msilo module I need your help to start. I went through the document a little without understanding much. Thanks for your help