Alex,
What you are looking for is sip_auto_answer (http://wiki.freeswitch.org/wiki/Variable_sip_auto_answer) that tells the phone to auto-answer the call
as long as your phone supports it and is configured
properly.
If the variable doesn’t work but your phone
supports it, then it is a matter of adding a SIP header the
phone understand. The SIP header is added by prepending
{sip_h_...}
On my Aastra phones, the SIP header is
Call-Info so it should look like this:
{sip_h_Call-Info=;auto-answer=0}
OK, so some
more research reveals this example:
<extension name="rtp_multicast_page">
<condition field="destination_number" expression="^pagegroup$|^7243">
<action application="answer"/>
<action application="esf_page_group"/>
</condition>
</extension>
Then there's a suggestion of using a loopback:
<action application="bridge" data="loopback/3456/YOUR_CONTEXT/XML"/>
<extension name="rtp_multicast_page">
<condition field="destination_number" expression="^3456$">
<action application="set" data="absolute_codec_string=PCMU at 20i"/>
<action application="set" data="jitterbuffer_msec=500:1000:20"/>
<action application="answer"/>
<action application="esf_page_group" data="234.5.6.7 23458 30"/>
</condition>
</extension>
This is beginning to be in the right
direction for what I want.
What I'm trying to do here is really aimed at callback. The
user hits a web button and then Freeswitch pages his phone and
then places an outbound call.
"api originate user/0095302 02070601234 XML dp0095"
Does the trick, by calling 0095302 and then on answer calls
02070601234.
What I'm trying to do is to not require the user to lift the
handset and it has been suggested that paging is the way to do
it. It's not a very true use of multicast, but might it work?