[Asterisk-Dev] IAX2 indepth question..

[Derek Smithies]

Hi

>From looking at an iax call dump of firefly, I note that they used

   REGREQ, REGAUTH and ACK packets

The REGREQ contains IE stating the username for authentication,
 and a IE stating when to refresh resistration.

The first REGREQ packet has a timestamp of 0, 
  src call number of XX   (something other than 0)
  dst call number of 0
  in and out seq no of 0,0 

some seconds later, a call is setup. 
The New packet has  a different src call number to that used in the REGREQ


Derek.

On Tue, 24 May 2005, Rob Thomas wrote:

> 
> For those that noticed it flash by on the -users list, Grandstream might
> be supporting IAX in the new GXP2000 (info available from
> http://aussievoip.com.au/wiki-GXP-2000 etc).  Now whilst this is a great
> idea, how would you go about monitoring extensions?  If you have a look
> at the pictures linked from that page, you'll see that the phone has 7
> buttons that imply they could be used as BLF's (which they're not, at
> the current software revision). 
> 
> With SIP you can SUBSCRIBE and receive NOTIFYs - how would you implement
> that with IAX2?  I've had a quick browse of the quasi-RFC and nothing
> jumps out at me.  
> 
> Potentially, should this be implemented with a Push-style MWI (discussed
> here recently) rather than the polling procedure which seems to be the
> only way to do it?
> 
> --Rob
> 
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-- 
Derek Smithies Ph.D.                         
IndraNet Technologies Ltd.                
Email: derek at indranet.co.nz         
ph +64 3 365 6485                          
Web: http://www.indranet-technologies.com/