[Freeswitch-users] Questions about att_xfer

Anatoliy Kounitskiy anatoliy at kounitskiy.com
Wed Aug 26 07:51:49 PDT 2009

Hello everybody!
I have few questions about the att_xfer application. First, what i want
to accomplish is: user A calls user B, after that user B makes attended
transfer to user C.
In the dialplan i have:

<context name="vpbx">
  <extension name="local_number">
      <action application="bind_meta_app" data="1 b s
execute_extension::dx XML features"/>
      <action application="bind_meta_app" data="2 b s
      <action application="bind_meta_app" data="3 b s
execute_extension::cf XML features"/>
      <action application="bind_meta_app" data="4 b s
execute_extension::attented_xfer XML features"/>

So when user B answers the call, he sends *4 and the extensions for the
attended transfer is started - the usual - plays message and read the
input dtmf:

    <extension name="attented_xfer">
      <condition field="${toll_allow}" expression="local"/>
      <condition field="destination_number" expression="^attented_xfer$">
        <action application="info"/>
        <action application="read" data="3 4 ivr/ivr-enter_ext.wav
attxfer_callthis 30000 #"/>
        <action application="set" data="call_timeout=15"/>
        <action application="att_xfer"

To this problems everything is perfect. But here comes the questions, so
if you can give some tips would be great.

1) when user B enters the extension number of C - the C's phone starts
ringing in the tcpdump i can see that the phone is sending 180 ringing,
BUT user B does not hear the ringing.
2) as mentioned in the
quote: "If the other leg is a voicemail or doesn't answered you can
hangup that leg by pressing dtmf # (fixed in r14438) "
It doesn't work. The option 0 is working even before C answering the
phone - after he answers it's a threeway conference :) - i like this

I'm using FreeSWITCH Version 1.0.trunk (14633M)

Also I tried to set call timeout to see if I can go back the user A, who
is listening to MOH - no luck here.

Probably I'm missing something. Tried to look in the source of att_xfer
to understand why the feature i want is not working - but it seems my
C/C++ skills are not so good, as i want :( .

Thank you in advance,
Anatoliy Kounitskiy

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