Telephone a message of the day

Hello all. I am fairly new to applescript and was wondering if this would be something that could be done.

I am trying to figure out how to send out a message of the day via telephone to a friend using a recorded mp3. It seems that actually dialing a number is not that difficult and there are plenty of scripts available… What I am wondering about, is how I could then play a mp3 or aiff sound file so that it could be heard over the phone?

Is it possible to have the output go over the modem?