[Freeswitch-users] Transferring calls from analog extension

[Shane Harrison]

Spent most of th day trying to get an attended transfer working on an
analog extension.

Ideally I would like a 2 -way call to be "transfered" when the user hangs
up ie. incoming call answered by analog extension (a-leg?), hookflash, dial
3rd party (b-leg?), talk to  them and hang up to bridge a-leg and b-leg.
However I couldn't find any hints on how to do this.

What I did find is information on using att_txfer application in the
dialplan as setup in the standard features.xml.  This all works OK, I push
*4 on the analog extension, the a-leg gets MOH, analog extension gets the
played dialtone but pushing keys on the analog extension to enter the new
destination does nothing.  It appears as if DTMF is ignored.

Analog extension users FreeTDM.  Has context as default in freetdm.conf.
Any pointers appreciated.  Below is the console debug.  It starts after the
call is setup from a SIP (308) extension to the analog extension
freetdm/2:1.

2012-03-11 19:38:50.393576 [DEBUG] ftdm_io.c:3530 [s2c1][1:4] Queuing DTMF
* (debug = 0)
2012-03-11 19:38:50.393576 [DEBUG] mod_freetdm.c:799 Queuing DTMF [*] in
channel FreeTDM/2:1/ device 2:1
2012-03-11 19:38:50.393576 [DEBUG] switch_ivr_bridge.c:391 Send signal
sofia/internal/308 at 192.168.7.49 [BREAK]
2012-03-11 19:38:51.073573 [DEBUG] ftdm_io.c:3530 [s2c1][1:4] Queuing DTMF
4 (debug = 0)
2012-03-11 19:38:51.073573 [DEBUG] mod_freetdm.c:799 Queuing DTMF [4] in
channel FreeTDM/2:1/ device 2:1
2012-03-11 19:38:51.073573 [DEBUG] switch_ivr_async.c:3058 sofia/internal/
308 at 192.168.7.49 Processing meta digit '4' [execute_extension::att_xfer XML
features]
2012-03-11 19:38:51.073573 [DEBUG] switch_core_session.c:1014 Send signal
FreeTDM/2:1/ [BREAK]
2012-03-11 19:38:51.073573 [DEBUG] switch_ivr_bridge.c:391 Send signal
sofia/internal/308 at 192.168.7.49 [BREAK]
2012-03-11 19:38:51.093575 [DEBUG] switch_core_session.c:731 Send signal
FreeTDM/2:1/ [BREAK]
2012-03-11 19:38:51.173589 [DEBUG] switch_core_session.c:1014 Send signal
sofia/internal/308 at 192.168.7.49 [BREAK]
2012-03-11 19:38:51.193585 [DEBUG] switch_core_session.c:731 Send signal
sofia/internal/308 at 192.168.7.49 [BREAK]
2012-03-11 19:38:51.373573 [DEBUG] switch_ivr.c:591 sofia/internal/
308 at 192.168.7.49 Command Execute playback(local_stream://moh)
EXECUTE sofia/internal/308 at 192.168.7.49 playback(local_stream://moh)
2012-03-11 19:38:51.373573 [DEBUG] mod_local_stream.c:421 Opening Stream
[moh/8000] 8000hz
2012-03-11 19:38:51.373573 [DEBUG] switch_ivr_play_say.c:1306 Codec
Activated L16 at 8000hz 1 channels 20ms
2012-03-11 19:38:51.373573 [DEBUG] switch_ivr.c:591 FreeTDM/2:1/ Command
Execute execute_extension(att_xfer XML features)
EXECUTE FreeTDM/2:1/ execute_extension(att_xfer XML features)
2012-03-11 19:38:51.373573 [INFO] mod_dialplan_xml.c:485 Processing Shane
PC <308>->att_xfer in context features
Dialplan: FreeTDM/2:1/ parsing [features->dx] continue=false
Dialplan: FreeTDM/2:1/ Regex (FAIL) [dx] destination_number(att_xfer) =~
/^dx$/ break=on-false
Dialplan: FreeTDM/2:1/ parsing [features->att_xfer] continue=false
Dialplan: FreeTDM/2:1/ Regex (PASS) [att_xfer] destination_number(att_xfer)
=~ /^att_xfer$/ break=on-false
Dialplan: FreeTDM/2:1/ Action read(3 4 'tone_stream://%(10000,0,350,440)'
digits 30000 #)
Dialplan: FreeTDM/2:1/ Action set(origination_cancel_key=#)
Dialplan: FreeTDM/2:1/ Action att_xfer(user/${digits}@xxxx.xxx.nz)
2012-03-11 19:38:51.373573 [NOTICE] switch_core_session.c:2386 Execute
read(3 4 'tone_stream://%(10000,0,350,440)' digits 30000 #)
EXECUTE FreeTDM/2:1/ read(3 4 'tone_stream://%(10000,0,350,440)' digits
30000 #)
2012-03-11 19:38:51.373573 [DEBUG] switch_ivr_play_say.c:1306 Codec
Activated L16 at 8000hz 1 channels 20ms
2012-03-11 19:39:01.410613 [DEBUG] switch_ivr_play_say.c:1678 done playing
file tone_stream://%(10000,0,350,440)
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