[Freeswitch-users] problem witch checking connection state in php script

Hello. I have small problem with checking connection state. In php script I use following commands: api originate sofia/gateway/voipdiscount.com/0048xxxxxxxx1 &park() api originate sofia/gateway/voipdiscount.com/0048xxxxxxxx2 &eavesdrop(first_uuid) I want to check if someone has picked up headphone before I use uuid_bridge command. How can I do this ? Thanks.