[Freeswitch-users] Fax detection - ringing not heard by caller

[Alex Crow]

Is anyone able to assist with this?

I've also tried it with an extension on the FS box instead of the 
Asterisk box - the caller does not hear ringing, just silence, even 
though the extension is ringing, and the call can be completed.

I've fiddled around for ages and I still can't get it to work. The 
Trixbox machine does it perfectly and I need to make the FS box behave 
the same, but it seems once "answer" has been executed I can only use 
"playback" to send ringing to the caller, but I can only do this while 
the tone detect is running. If it set playback to loop then the plan 
never proceeds to the bridge/transfer to the extension.

Thanks

Alex



> All,
>
> I am trying to implement fax detection on FreeSwitch within a dialplan
> that routes inbound calls from a BRI (Sangoma), to an Asterisk (Trixbox)
> machine handling the extensions. I am only doing this until I can get
> British English sounds for FS ;-).
>
> The inbound route without any fax detection works fine, ie the caller
> hears ringing until the Trixbox extension is either answered or hits
> voicemail:
>
> <extension name="60xto35x">
> <condition field="source" expression="freetdm"/>
> <condition field="context" expression="public"/>
> <condition field="destination_number" expression="60([0-5])">
> <action application="bridge" data="sofia/external/35$1 at 192.168.24.15"/>
> </condition>
> </extension>
>
>
> The closest I have got to adding the fax detection is the following:
>
> <extension name="60xto35x_copy">
> <condition field="source" expression="freetdm"/>
> <condition field="context" expression="public"/>
> <condition field="destination_number" expression="60([0-5])">
> <action application="tone_detect" data="fax 1100 r +5000 transfer '620
> XML default'"/>
> <action application="answer"/>
> <action application="playback" data="tone_stream://$${uk-ring};loops=3"/>
> <action application="bridge" data="sofia/external/35$1 at 192.168.24.15"/>
> </condition>
> </extension>
>
> I had to add the playback so the caller would hear ringing during the
> tone_detect timeout.
>
> However, as soon as the tone_stream finishes, and the call is bridged to
> the Trixbox, the caller hears silence instead of ringing. Is there any
> way to pass the ringing from the extension back to the caller coming in
> on the BRI circuit, or otherwise fake it until the remote extension is
> answered?
>
> Thanks
>
> Alex
>


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