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

[Steve Underwood]

Matthew Crocker wrote:

> Think back,  The telco started with inline signaling.  Pulsing digits, 
> cross bar switching, DTMF, CAS ....  'Yesterdays telco' took signaling 
> out of band for a reason.  I'm not sure putting the signaling back 
> into the bearer channel is a 'good thing'.

IAX signalling is out of band in a similar way to the way most modern 
telephony works. A single IAX connection contains many independant 
flows. Signalling and voice are distinct. This is equivalent to ISDN or 
SS7 signalling being its own channel but bundled in the same 
E1/OC-192/whatever as the voice. It is also not too far from how SCTP 
works for SS7 over IP.

Steve