Well, thats what Im saying. The FCC IS going to madate another switch to 6.25 "narrow narrow band", we just dont know how long until they do that, 10 years, 15, maybe less.
So for the railroads to save money and headaches, they should just switch right to 6.25.
BTW, the only way to do 6.25 bandwidth is with some kind of digital format, NXDN or P25.
Steven