[Asterisk-Users] Re: How far is IAX to be a Standard

[Benjamin on Asterisk Mailing Lists]

niels at wxn.nl wrote:

> IAX really isn't the 'one and only' perfect signaling protocol

IAX is *not* a signalling protocol. It is a VoIP protocol.

And that's the whole point. H.323, SIP, et al those are all signalling
protocols, half protocols so to speak. IAX is a self-contained, true
internet protocol. In a world where everything is moving towards peer
to peer that is an advantage. Dedicated protocols for signalling-only
have been designed for large telcos and yesterday's telco
infrastructure, not for the future of voice on the net peer to peer
style.

> signaling (asterisk in this case) asterisk would have to 'tell' the DSP
> chip the signaling packets to embed into the IAX/RTP channel.

Do you actually know how IAX works? There is no such thing as IAX/RTP,
none whatsoever. Again, that's the whole point of IAX.

If you refer to the urban legend that IAX always needs a server to
stay in the media path, then you would be wrong. IAX has a mechanism
that for all practical purposes is equivalent to a SIP reinvite
through which the end points then transition to a mode by which they
communicate directly peer to peer.

> Will any chipmaker (besides digium)
> ever see the need to design such a chip?

There is already one chipmaker who thought that IAX was important or
competitive advantage enough to embed it into their chip. So,
precedence has been set already. This trend can be expected to
continue. And, no, Digium had no involvement in this (Mark please
correct me if I am wrong).

rgds
benjk

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