That's why I went back to a stand-alone answering machine with a skip button (and a good ComSwitch to direct all the various signals over the phone line).
It is really hard finding technology that is good to use when your are half asleep.
I know what the buttons on my machine do, but I dred the tour through the instruction manual to reset things.
When my long distance provider changed the sequence of entering digits, I had to go through all the steps of resetting what automatically dialed the numbers and pass codes.
Then the stupid box has a mode if anything has come in and you have not diddled with the buttons that look at received calls, it sets up to rapid flashing of a bright red light.
I got so sick and tired of checking a dark house with a panicky red light I took the thing to my shop, opened it up, and snipped it out.