[asterisk-users] IAX2 - Separate Signaling and Media?

Kevin P. Fleming kpfleming at digium.com
Tue Aug 24 06:45:27 CDT 2010

On 08/23/2010 10:30 PM, Tim Nelson wrote:
> ----- "Tim Nelson" <tnelson at rockbochs.com> wrote:
>> Greetings all-
>> Here's an odd question. Supposedly, IAX2 now has the ability to
>> operate with signaling and media in separate streams, very much like
>> SIP. I've read about this feature here[1] and there[2], but I have yet
>> to see how to actually implement or test it. There are no options in
>> the iax.conf sample configs with Asterisk.
>> All suggestions welcome, except those telling me to jump off a bridge
>> because separated signaling and media makes IAX pointless when
>> compared to SIP. :-)
> Ugh, and let me specify references as originally intended:
> [1] http://tools.ietf.org/search/rfc5456
> [2] http://www.voip-info.org/wiki/view/IAX+versus+SIP

I believe you are misinterpreting the RFC. IAX2 cannot use a separate
signaling and media stream to setup a call, but it *can* optimize a
media stream for a bridged call so that the media does not have to make
as many hops as the signaling does. The media still moves on the same
ports as the signaling packets, using the same protocol.

Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kfleming at digium.com
Check us out at www.digium.com & www.asterisk.org

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