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You do need an account, but it's with Apple.

• jolan 16y ago
  Right. They said they use SIP for this, which does require an account. I assume Apple/AT&T are automapping phone numbers to SIP accounts. SIP video phones have been on the market for years already.
  • ryanhuff 16y ago
    Can you share a link which explains the details of Apple using SIP for this?
    • jolan 16y ago
      I don't think there is one yet. Just this slide showing that they're using a bunch of VOIP protocols to implement it: http://www.blogcdn.com/www.engadget.com/media/2010/06/apple-wwdc-2010-384-rm-eng.jpg http://www.blogcdn.com/www.engadget.com/media/2010/06/apple-...