[asterisk-users] Detect IP path before calling

[Paul Hales]

On Wed, 2007-01-03 at 19:33 -0800, Yuan LIU wrote:
> >From: Paul Hales <pdhales at optusnet.com.au>
> >
> >With the chanisavail command.
> >
> >PaulH
> 
> Doesn't seem to have effect.  Probably I should state the problem more 
> clearly.  Ideally, Asterisk should not attempt SIP if there's no way to 
> establish a SIP call.  This may include lack of IP connection (ping timeout, 
> for example), or no SIP listener on remote side (this would be difficult 
> because Asterisk can only use UDP).
> 
> My environment does not require remote end point to register, so consulting 
> the registry is not an option. (This is perhaps what ChanIsAvail does.)
> 
> Any suggestions?  I'll go to scripting if no other easy way.
> 
> Yuan Liu
> 

OK - if your endpoints don't register, then chanisavail won't work very well. Chanisavail works together with 'qualify=' in sip.conf so you can send a call based on the availability of the endpoint.

PaulH