As they all said above.

 

I think IAX is supported on some Cisco equipment for WAN connectivity, making it useful for interconnecting back-end systems and servers (e.g. server to server rather than server to UA).

 

I believe IAX uses the same port(s) for signalling as for media, as compared to SIP vs RTP using separate streams. This makes it easier when doing port-forwarding and may give it an advantage for NAT traversal.

 

That being said, it is not yet an officially recognised protocol (from what I heard) and has not yet been as widely adopted as SIP. In short, you will find more SIP-enabled devices than you will find IAX devices, though there are some IAX softphones around.

 

On 10/9/06, Klaus Fleischmann <kgfleischmann@t-online.de> wrote:

Mike Williams wrote:
> On Monday 09 October 2006 06:49, raviprakash sunkara wrote:
>
> Raviprakash,
>
>
>> we can Communicate the SIP and IAX by below scenario
>>
>> SIP (UA) --------> OPENSER -----> ASTERISK --------> IAX (UA).......  this
>> I can do...
>> IAX -----------> OPENSER  ----->  ASTERISK --------->  SIP/IAX.
>>
>
> I don't think this one would work. It would need to be:
> IAX -------> Asterisk -------> OpenSER ------> Asterisk -------> IAX
>
>
>> But main  problem  is ...
>> Suppose
>> IAX ------> ASTERISK-----------> openSER ------------> SIP / IAX  ... How ?
>>
>
> This one would be just like the one above:
> IAX -------> Asterisk -------> OpenSER ------> Asterisk -------> IAX
>
>> Help me this.... forgive me in English.... :P
>>
>
> I would recommend you to use SIP, because I think Asterisk is the only server
> that supports IAX, and almost all phones are SIP phones, not IAX phones. I
> believe IAX is mostly designed to connect two Asterisk servers.
>
Indeed, IAX means Inter Asterisk Exchange.  It came up with Asterisk.
> Mike Williams
>
>
>
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