You are most very welcome! Please enjoy and pass your new knowledge on. That is how we can all learn together!I am a new ham, and just got my dmr hot spot up and going. I was listening to a QSO about tac 310 and its usage. You comment explained it very well and now I understand. I wish things were explained in plane understandable words like this on other web sites so that new hams like me dont make other operators angry or use the system incorrectly by accident. Thanks for the post.