>It uses a standard Internet protocol (SIP+SRTP) as they said in the keynote. While it draws from a lot of existing standards, it embraces and extends. It isn'

>It uses a standard Internet protocol (SIP+SRTP) as they said in the keynote. While it draws from a lot of existing standards, it embraces and extends. It isn't interoperable with anything currently deployed. Which is interesting because one alternative world would have seen them introducing the standard a year ago, to be met by broad acceptance and compatibility at release. They chose not to do this, meaning that early adopters enter a very scarce world.