A bit of feedback re: why this was unclear:

> Eventually, you need to record over that message

This led me to believe that you were talking about my voicemail. I can't record over someone else's.

> Make sure no one will answer the phone, other than your voicemail or answering machine.

"Your voicemail or answering machine" seemed to confirm that it was supposed to call my number, but now I know I was wrong.