From 24U Software:
24U Phone Companion ties FileMaker Pro to your PBX to give your database solution a full control over your phone. Get a client on phone with a click. Answer a client's call with a click. Find calling client's info instantly. Log incoming, outgoing, and missed calls. 24U Phone Companion allows FileMaker solutions to interact directly with supported PBX (telephone switches). This plug-in allows you (your solution) to do all the following things without even touching your phone: dial a phone number from your phone, accept an incoming phone call, hang up a call in progress, run a script when an incoming call is transfered to your phone, run a script when a call is accepted/missed/hang up, check the current status of your phone line.