[Freeswitch-users] Question about fax tone detection

[Michael Collins]

On Mon, Oct 12, 2009 at 4:01 AM, homqua <ngay01042005 at gmail.com> wrote:

>
> Hi,
> I have implemented the solution for tone detection in wiki, and also answer
> the channel before detecting the tone:
> <condition field="destination_number" expression="^(055138419992)$">
>    <action application="answer"/>
>    <action application="tone_detect" data="fax 1100 r +15000 transfer fax
> XML default"/>
>
>
> <extension name="fax">
>      <condition field="destination_number" expression="^fax$">
>        <action application="answer" />
>        <action application="sleep" data="1000"/>
>        <action application="rxfax"
>
> data="/usr/local/freeswitch/storage/fax/${caller_id_number}-${strftime(%Y-%m-%d-%H-%M-%S)}.tiff"/>
>    <action application="set" data="fax_mode=recv"/>
>        <action application="hangup"/>
>      </condition>
>    </extension>
>
>
> But FS cannot recognize the tone, and therefore cannot move to fax
> extension.  Below are the error in FS:
>
> 2009-10-12 10:57:16.702287 [NOTICE] switch_channel.c:602 New Channel
> sofia/external/anonymous at anonymous.invalid
> [c431f0a3-9231-4724-ba39-9e4ef7edfca2]
> 2009-10-12 10:57:16.703413 [INFO] mod_dialplan_xml.c:315 Processing
> Anonymous->055138419992 in context public
> 2009-10-12 10:57:16.719288 [NOTICE] switch_ivr.c:1349 Transfer
> sofia/external/anonymous at anonymous.invalid to XML[055138419992 at default]
> 2009-10-12 10:57:16.719288 [INFO] mod_dialplan_xml.c:315 Processing
> Anonymous->055138419992 in context default
> 2009-10-12 10:57:16.722289 [NOTICE] mod_dptools.c:649 Channel
> [sofia/external/anonymous at anonymous.invalid] has been answered
> 2009-10-12 10:57:16.722289 [NOTICE] mod_dptools.c:1324 Enabling tone
> detection 'fax' '1100'
> 2009-10-12 10:57:16.723302 [NOTICE] switch_core_state_machine.c:179 Hangup
> sofia/external/anonymous at anonymous.invalid [CS_EXECUTE] [NORMAL_CLEARING]
> 2009-10-12 10:57:16.740285 [NOTICE] switch_core_session.c:1086 Session 1
> (sofia/external/anonymous at anonymous.invalid) Ended
> 2009-10-12 10:57:16.740285 [NOTICE] switch_core_session.c:1088 Close
> Channel
> sofia/external/anonymous at anonymous.invalid [CS_DESTROY]
>
> And the trace for SIP messages:  http://pastebin.com/m4e47e7d9
>
> If anyone has any idea, tell me please.
> Thanks.
>

I think the trouble here is that you don't have anything else in the
dialplan after the tone_detect. The tone_detect app is non-block, which
means that it doesn't sit there and wait for a tone. If you want the
dialplan to sit and wait then do a sleep app after your tone_detect. The
other question I would have is this: what happens if the incoming call is
not a fax? What do you want to do then?

-MC
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