[Freeswitch-dev] Doubt on bridge programatically

Hello! I am working on a module having this doubt: Once a call reachs to dialplan I call my app and I don't know which is the best way (if more than one exits) to bridge that call to an onbound provider controlling failed connections to try with a failure trunk. Is there any way to get call connection status (BUSY, CONGESTION...) from code? Is necessary to use events or may it be obtained as result of bridge function? Regards