Jack. We on the other side see THAT as exactly the problem. Your mailbox sits there silent. Somone else gets on the freq and calls it. It comes up - and causes interference to someone else that is already using the freq (which you would have heard if you were physically sitting there operating). The origninal caller to you, because of propagation, did not hear the other ongoing QSO- but YOU would have. Therefore it is your transmitter that caused the interference. All quite easily taken care of if our software had a "busy signal" capability, and simply didnt respond to the other guy, while other signals were up and on the air. That software has been written, and from my understanding would be made available to the Pactor software people, if they would just accept it. If its been done, other software writers can do the same.
Your mailbox needs to be controlled by YOU, not the other end, as long as there is no "busy signal" detection. Danny Douglas N7DC ex WN5QMX ET2US WA5UKR ET3USA SV0WPP VS6DD N7DC/YV5 G5CTB All 2 years or more (except Novice) Pls QSL direct, buro, or LOTW preferred, I Do not use, but as a courtesy do upload to eQSL for those who do.