asterisk users - Feb 2004 - setting up callback

Is there any way to setup callback (for DISA) without going through writing
an AGI script ?

I have tried to use

exten => h,1,System(callback)

but this is what I get:

Feb 12 10:09:29 WARNING[1082809536]: asterisk.c:255 listener: Select retured
error: Interrupted system call
Feb 12 10:09:29 WARNING[1236268096]: app_system.c:57 system_exec: Unable to
execute 'callback'
  == Spawn extension (default, h, 1) exited non-zero on
'SIP/3267915-ab61'

Yesterday this has also managed to crash asterisk.

Thanks,

Dave

Hi!
> Is there any way to setup callback (for DISA) without going through writing
> an AGI script ?
Here is an example that might put you onto the right path:
http://ns1.jnetdns.de/jn/relaunch/asterisk/page14.html

Cheers, Philipp