I have not heard anything on 155.43 for years, except some tone noise last week which I associated with some random noise generation so prevalent in the city. It was nothing close to a digital signal but was steady and was near a store/gasoline store that generate a lot of QRM on various frequencies. So I wouldn't think there is anything in the Calgary area on this frequency as was pointed out that it has been an RCMP frequency.
Encouraging proper use of two way radio spectrum including CB.
Encouraging proper use of two way radio spectrum including CB.