So, sort of a phrase used in local bus culture instead of 10-4?N-T is used by the bus drivers. I believe it is from back in the day and it means Niagara Transit
that is for any old time FDNY listeners where the repeater hung open for a few seconds and you said "K" to end your transmission. K
Actually, in that context, it was, "By," as in "standing by."I remember old Highway Patrol with Broderick Crawford and company would say "Bye" at the end of transmission.. "21-50 Bye" on acknowledgement . I don't know if thats a west coast vs east coast thing or what