The best-in-class H.324M (3G) and H.323/SIP integration can be achieved for the enterprise in order to extend the reach and functionality of any enterprise videoconferencing infrastructure.

Many people now have 3G video phones: the 3G video market is growing rapidly and offers users a wide range of applications not possible before with 2G technology. One such application which opens up a whole host of exciting possibilities is the ability to integrate 3G handsets with H.323, SIP and H.320 video conferencing networks.
For example, salesmen or top managers can still join a conference call while "on the road" - receiving and contributing video from their 3G handsets, also using a video IVR (interactive menu) to join conferences.

Check this Whitepaper for a full description of the solution.