[asterisk-users] res fax help

[David Backeberg]

On Fri, Apr 9, 2010 at 5:40 PM, Joe Freeman <joe at ngn-networks.com> wrote:
> I have res_fax setup and working for the most part. However, I'm seeing
> some fax machines drop the connection on me -
>
> Apr  9 17:33:11] NOTICE[30809]: res_fax.c:906 generic_fax_exec: Channel
> 'DAHDI/1-1' did not return a frame; probably hung up.
>     -- Channel 0/1, span 1 got hangup, cause 102
>     -- Channel 'DAHDI/1-1' FAX session '20' is complete, result:
> 'SUCCESS' (FAX_SUCCESS), error: 'NO_ERROR', pages: 1, resolution:
> '204x98', transfer rate: '14400', remoteSID: '<numberredacted>'
>   == Spawn extension (macro-fax_rcv, s, 3) exited non-zero on
> 'DAHDI/1-1' in macro 'fax_rcv'
>
> It appears to be dropping out of my macro fax_rcv at that point and not
> executing the next step in the dialplan, which is a System call to a
> script that converts the tif to a pdf and emails it to the extension owner.
>
> My question is how do I ensure that my script is called when the far end
> hangs up before the call progresses that far in the dialplan?
>
> My first thought is to add something like this-
>
> exten => h, 1, System(callmyscript.sh,arg1,arg2,arg3,arg4,argimapirate)
>
> to the macro, but I'm not sure if that would do it or not.
>
> Anyone have any thoughts?

Yes. Do the conversion in the hangup side of the context. That's the
only way I've ever been able to do it. My understanding is that at the
conclusion of ReceiveFax(), the line is hungup, and that is correct,
normal behavior.