Arduino for DTMF?

Oh! Those are awesome suggestions! Thank you! My reason for wanting to try this is because plantronics amps and headsets are ridiculously expensive. This would definitely cut down on costs, At work when I get a call a DTMF beep gets piped to the headset, I could probably set it so that it automatically unmutes me when it hears that tone.. Thanks. I've got a lot of research ahead of me. =)