[Freeswitch-users] call barge in

Hi all, I'm evaluating FS for our organization. I must fulfill the following requirements: 1. Call recording: All (or selected) calls to the secretary must be recorded. 2. Call barge in: Assume that two subscribers are talking to each other. Secretary makes "emergency" (for example, an extension with emergency prefix) call to one of these subscribers -> Secretary barges in the established call (conference). 3. Call drop when emergency call arrives: the same as above, but established call is dropped end emergency call is established. Can anybody please advise if this is possible with FS? If yes, is it just a configuration task, or additional programming will be needed? Thanks in advance, Nikolay.