Video and Voice conferencing

We need a SIP compliant Voice and Video conferencing solution.? One possibility is to use Asterisk as SIP server, and either RED5, Flex3, or any other SIP phone. Features required: 1. Multi-party Video and Voice conferencing - only the active person speaking will be shown on video 2. Video controls like pan in/out, full screen, picture-in-picture 3. Audio controls like speaker and mic volume 4.? Support for NAT and STUN 5.? Call history 6.? Video and voice mailbox 7. Extended to support SIMPLE for text and whiteboard 8. Recording ## Deliverables We see the solution integrating with our existing IM application as follows: 1.? ? ? ? ? ? Login to our iM Platform. This will also login to the sip server. 2.? ? ? ? ? ? We will populate our IM Contacts 3.? ? ? ? ? ? We can right click on a contact and do a Voip Chat. 4.? ? ? ? ? ? The chat will be initiated via the sip server, this must tunnel thru NATS and Firewalls 5.? ? ? ? ? ? We can also initiate a group conference with the sip server. (Multi-party voip or video)