[Freeswitch-users] Eavesdrop in LUA

[rod]

Hi Pete,

to get the beginning of the communication, I find this:
use the pre-answer/ringback command before bridging the call, this will 
issue a 183 with ringback in RTP.  Doing this, eavesdrop application  
can listen  the  caller  A talking  in the phone (and the ringback tone) 
even if the call is not connected to B :o

in the dialplan I did this:
<action application="set" data="ringback=$${fr-ring}"/>
<action application="pre_answer"/>
<action application="sleep" data="500"/>
<actionapplication="bridge"data="{ecoute=${caller_id_number}}sofia/gateway/${caller_id_number}/${destination_numbe\
r}"/>

A colleague wrote a perl script using mod_event that looks for when a 
call that should be eavesdrop is connecting and originate a call to C 
using eavesdrop on A leg. I will ask my colleague/boss if he's okay to 
share his script on the wiki. I think, he'll be okay, but prefer asking 
before.

Give a try to pre-anwer with lua, and let me know if you could eavesdrop 
to a call before the call is exchanging media.
Are you ok to share your lua script, so that we could document the 
eavesdrop page ?

regards,
rod

Pete Mueller a écrit :
> I had a similar problem.  I solved it by first making bridging the call
> between A and B.
> Then originate C with a LUA script, the last line of which is:
>
> session:execute("eavesdrop", uuid_of_a_leg)
>
> The down side here is that A and B can talk while C is ringing, but in my
> case that is not a problem.
> -p
>
> -----Original Message-----
> From: freeswitch-users-bounces at lists.freeswitch.org
> [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of rod
> Sent: Thursday, January 14, 2010 8:10 AM
> To: freeswitch-users at lists.freeswitch.org
> Subject: Re: [Freeswitch-users] Eavesdrop in LUA
>
> Hi all,
>
> I have an incomplete solution for those interested.
>
> I did it like this in dialplan:
>         <action application="set" data="api_on_answer=originate 
> sofia/internal/2000 at 10.10.10.10 &eavesdrop(${uuid})"/>-->
>         <action application="bridge" 
> data="{ecoute=${caller_id_number}}sofia/gateway/${caller_id_number}/${destin
> ation_number}"/>
>
> so when a call is setup, FS initiate a new call to 2000 and eavesdrop 
> the call.
> But I have a small problem, the callee receives no sound until the 
> eavesdropper send a SIP reply, so there is a 2-3 seconds delay before 
> caller and callee can talk each other.
>
> rod
>
>
> rod a écrit :
>   
>> Hi all,
>>
>> I'm trying to do this in LUA:
>>      A call B
>>
>> and I'd like to setup a new call to C with eavesdrop of A conversation 
>> with B.
>>
>> I have no idea how to do this if someone can help.
>> I switched to LUA cause I see no way to achieve this with dialplan 
>> (snippets are welcome).
>>
>> regards,
>> rod
>>
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