It seems to me that you have a mess in your logic or maybe you will write me in Russian to email so i could understand better your problem?
Hello.
For right work our extensions we need make att_xfer not so stupid,
because when we call leg C, in rules we can have IVR, queue, group
calls, redirects to another extension, ext call etc. But att_xfer make
only bridge. For us it does not work.
In system - ALL calls makes via kamailio, and bridge goes to kamailio
too (with error 500 in ivr/queue)
First, i try to return 302 from kamailio with called contact when i see
some variable in invite, but it's work not so good, and with bugs.
Second, i use loopback. Works strange, but better than nothing. But in docs
https://freeswitch.org/confluence/display/FREESWITCH/Attended+Transfer
Observations
att_xfer will not work with loopback channels because the application
blocks when bridged to the C leg. If the C leg hangs up, it will bridge
back to A. Since loopback hangs up to replace the legs to the correct
legs, att_xfer will detect that and bridge it back to the A leg
automatically.
Old info in doc or really we will have problems?
Or i need write right att_xfer on python/lua?
Please, share your experience and maybe more worked code.
Now:
<extension name="att_xfer">
<condition field="destination_number" expression="^att_xfer$">
<action application="read" data="2 15
'tone_stream://%(10000,0,350,440)' digits 5000 #"/>
<action application="set" data="origination_cancel_key=#"/>
<action application="set" data="sip_h_X-return=true"/>
<action application="log" data="err
sip_from_port=${sip_from_port}, sip_to_port=${sip_to_port}, <action
application="set"
data="export_vars=sip_ph_X-Call-UUID,X-ResolveArray,Other-Leg-Unique-ID,sip_rh_X-Leg2i,Other-Leg-X-Leg2i,sip_h_X-Inring,sip_h_X-FromID,sip_received_port,sip_req_uri,sip_from_uri,sip_req_user,sip_req_host,sip_to_uri,sip_to_user,sip_to_host,sip_from_user,sip_from_host"/>
<action application="att_xfer" data="loopback/${digits}/XML"/>
</condition>
</extension>
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