[asterisk-users] Timeout in IAX vs SIP

[Olle E Johansson]

30 jan 2007 kl. 06.38 skrev Yuan LIU:

> When Asterisk dials an IAX destination with no registration, it  
> very quickly comes to the conclusion that it can't make the call
>    -- Executing [500 at default:2] Dial("Zap/1-1", "IAX2/ 
> guest at misery.digium.com/s at default") in new stack
>    -- Called guest at misery.digium.com/s at default
> [Jan 29 21:43:15] NOTICE[1957]: chan_iax2.c:2686 __auto_congest:  
> Auto-congesting call due to slow response
>    -- IAX2/216.207.245.8:4569-1 is circuit-busy
>    -- Hungup 'IAX2/216.207.245.8:4569-1'
>  == Everyone is busy/congested at this time (1:0/1/0)
> But if Asterisk Dials a SIP destination it doesn't have a  
> registration, it waits for a very long time before giving up.
>
> What is the difference?  Does IAX use TCP instead of UDP?  Is there  
> some way to change timeout value in SIP attempt so it gives up in a  
> reasonable time?
>
Both protocols use UDP, bot the timers are a bit different. However,  
if there's no registration
both channels should act the same unless there's a configuration  
that's giving wrong information
to chan_sip, like you having a username= or defaultip= setting.

/O