develop voice chat?

[eluser]ahmedbloger[/eluser]
hi,
i have a project these days which need i need to develop a voice chat with some advanced features such as recording the sound at it,but i don't how to start please help me with any tutorials or sources .
in brief i want to develop something such yahoo messenger voice chat but work at web.
thank you.

[eluser]umefarooq[/eluser]
hi try some opensource project will help you, only deployment you have to do no need to create a new system you will find some good opensource systems checkout this one

http://www.bigbluebutton.org/

or search on

sourceforge.net, http://code.google.com you will find some good systems

[eluser]ahmedbloger[/eluser]
thank you for your help