[Freeswitch-users] Question about fax tone detection

[Mark Campbell-Smith]

This is what I have in my dialplan and the fax is detected
beautifully.  Note that in my case, extension 1000 will ring for a
second or two before the fax is detected.  So in your example, the fax
does not have time to be detected, the dialplan exists and the call is
hungup.

When the fax is detected, the call is transferred to the receivefax
extension in context features.  The extension 1000 does not have to be
answered for the transfer to occur.

    <extension name="Local_1000s">
      <condition field="destination_number" expression="^(10[01][0-9])$">
        <action application="set" data="dialed_extension=$1"/>
        <action application="export" data="dialed_extension=$1"/>
        <action application="set" data="ringback=${au-ring}"/>
        <action application="tone_detect" data="fax 1100 r +5000
transfer 'receivefax XML features' 1" />
        <action application="set" data="hangup_after_bridge=true"/>
        <action application="set" data="continue_on_fail=true"/>
        <action application="bridge" data="user/${dialed_extension}@${domain}"/>
        <action application="answer"/>
        <action application="sleep" data="1000"/>
        <action application="voicemail" data="default ${domain_name}
${dialed_extension}"/>
      </condition>
   </extension>

and in the features context I have
    <extension name="receivefax">
      <condition field="destination_number" expression="^receivefax$">
        <action application="answer" />
        <action application="playback" data="silence_stream://2000"/>
        <action application="rxfax"
data="//usr//local//freeswitch//storage//${caller_id_number}-${uuid}.rxfax.tiff"/>
        <action application="system"
data="/usr/local/freeswitch/scripts/emailfax.sh
/usr/local/freeswitch/storage/${caller_id_number}-${uuid}.rxfax.tiff"/>
        <action application="hangup"/>
      </condition>
    </extension>
On Tue, Oct 13, 2009 at 5:00 AM, Michael Collins <msc at freeswitch.org> wrote:
>
>
> On Mon, Oct 12, 2009 at 4:01 AM, homqua <ngay01042005 at gmail.com> wrote:
>>
>> Hi,
>> I have implemented the solution for tone detection in wiki, and also
>> answer
>> the channel before detecting the tone:
>> <condition field="destination_number" expression="^(055138419992)$">
>>    <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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