> First one that comes to mind is the built-in transfer similar > to the SIP canreinvite. > > The current way SIP canreinvite works; Asterisk is kept in > the middle of the media stream until the two endpoints can > send the media stream to each other directly. > > IAX can direct the media stream between the two endpoints > without actually getting in the middle of the media stream at all.
This, in my opinion, is a disadvantage of IAX2. IAX2 does not support the proxy handling signalling only and not media, which means that the entire call (signalling + media) must go through the proxy or none at all. Somebody correct me if I am wrong... Nabeel
