sems/apps/conference

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* Conferencing plug-in README *
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Description:
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The 'conference' plug-in works very easy: 
every call having the same request URI will 
be in the same conference room.

Dialout feature:
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Dialout is supported through AVT tones. Somebody
who has been 'dialed out' cannot use this functionnality
due to billing issues. If you still want that, you can 
turn it out in the code (search for 'if(dialedout)').

keys:
 - '#*' to trigger dialout. Then type in the number and finish with '*'.
 - you be first connected to the callee only
 - press '*' to connect the callee to the conference.
 - press '#' to drop the call.


Configuration:
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default_announce: announcement to be played to the 
		  first participant as he enters the 
                  conference room.

join_sound: sound to be played to all the participants
            when a new one joins the conference. (optional)

drop_sound: sound to be played to all the participants
            when a participant leaves the conference. (optional)

dialout_suffix: suffix to be append to the numbered entered by
                the user. Example: @iptel.org