There is but there's a problem. I tried this recently with my Sawtooth G4 but from what I've read, most Macs haven't had internal modems with voice capibility for a few years. I remember my old 5200's modem could do it, and there was even Apple software, but I think you'd need to get a voice capable modem to use your Cube as an answering machine. ComaX (I think that's the name) will do it but the documentation isn't great unless you speak German and of course there's the modem thing. I could be wrong but I think you'll need a new modem for the Cube to use it.