I usually can listen to my scanners and just determine by traffic what, who and where. I just got a new desk in the shack set-up and have the radios mounted at eye level and can glance over and see what, who and where and I have noticed today that TPD's usual Service Side traffic has been on 7-M 31344 today and not on 7-J 31568 as per usual. Don't know if this is a temp. thing or if the line-ups are changing. I have now set 2 radios up, one on 7-M and one on 7-J to see what's up.....