[Freeswitch-users] using spandsp fax tone detection from originate command

[Adam Johnston]

I had actually added some sleep commands in some of my other command
combinations but I kept getting the same result. However, once I increased
the timeout to spandsp_start_fax_detect and increased the sleep time I
started getting some successful faxes out.

If no fax tone is detected I would like to set fax_result_code to a custom
error code that I could then map in my controller application. Is there
some way to evaluate the result of a tone detect? I've been trying the
below inline dialplan but it's giving my false negatives so I'm back on the
wiki looking for a solution.

'spandsp_start_fax_detect:txfax /tmp/myfax.tif 10
ced,sleep:10000,set:fax_result_code:951' inline

Many thanks,

Adam Johnston


On Fri, Sep 21, 2012 at 2:07 PM, Michael Collins <msc at freeswitch.org> wrote:

> Hi Adam,
>
> The key piece of information is this:
>
> [NOTICE] switch_core_state_machine.c:226 sofia/external/18005551234 has
> executed the last dialplan instruction, hanging up.
>
> You've enabled "fax detection" on the call but you haven't told the call
> to actually do anything. From what you're doing it seems like you're
> wanting to detect a fax and then run the txfax application. But what
> happens if a fax is not detected? Also, what happens to the call in the
> interim, i.e. between the time you enable fax detect and the time it
> actually detects a fax tone? The call needs to do "something" while waiting
> for a fax tone. You may be better off sending this call to an extension and
> then having several dialplan actions, like "answer",
> "spandsp_start_fax_detect", and then a "sleep" or "playback" app, or
> something for the channel to do while it's waiting for fax tone.
>
> Question: what do you want the call to do if no fax is detected?
>
> -MC
>
> On Fri, Sep 21, 2012 at 10:26 AM, Adam Johnston <
> ajohnston at blimessaging.com> wrote:
>
>> Hi all,
>>
>> I've been trying to use the spandsp_start_fax_detect application (with
>> txfax as the callback) from the originate command but I keep getting a
>> hangup before it completes.
>>
>> So far I've tried calling the app directly:
>> originate {ignore_early_media='true'}sofia/gateway/mygateway/18005551234&spandsp_start_fax_detect('txfax /tmp/myfax.tif 3 ced')
>>
>> Inline dialplan:
>> originate {ignore_early_media='true'}sofia/gateway/mygateway/18005551234'spandsp_start_fax_detect:txfax /tmp/myfax.tif 3 ced' inline
>>
>> ..plus some other permutations but all end with the same result:
>>
>> [NOTICE] mod_spandsp.c:107 Enabling fax detection 'txfax' '/tmp/myfax.tif'
>> [DEBUG] switch_core_media_bug.c:456 Attaching BUG to sofia/external/
>> 18005551234
>> [NOTICE] switch_core_state_machine.c:226 sofia/external/18005551234 has
>> executed the last dialplan instruction, hanging up.
>>
>> Am I misunderstanding how spandsp_start_fax_detect works?
>>
>> Adam Johnston
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
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>
>
> --
> Michael S Collins
> Twitter: @mercutioviz
> http://www.FreeSWITCH.org
> http://www.ClueCon.com
> http://www.OSTAG.org
>
>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
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>
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