This thread could be answered so many different ways. I will use my phone to call the center, if it is to ask a question or if it is to my advantage. Luckily for me, coverage is spotty on my route for both my phone and the DIAD, and management knows that. That allows me to pretty much ignore messages until I feel like responding.
We have some pretty cool OMS's. One, I will call to vent just because she is just as jaded and cynical as I am. She once called me, and I asked where she got my number. She replied that it was on my rolodex card. I asked her to make a new card without it, and she did. I was also asked by an on-road for my number recently, and I explained that the only people who have it are family and friends.