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VoIP subscriber gateways  95 
5.3.2 Remote conference 
The  remote  conference  operates  via  the  algorithm  described  in  RFC4579.  The  special  aspect  of  the 
algorithm  is  that  the  initiating  subscriber  should  press  flash+3  in  order  to  establish  connection  with  the 
conference server (also called 'focus'), and request the focus to connect to remaining conference participants. 
The figure below shows detailed operation algorithm.