Not sure how many folks use EF Johnson VHF P25 gear with smartnet/smartzone around Southern Ontario for monitoring--I've noted elsewhere that they're amazing radios that when set up properly will never bother any controller, never affiliate, never get inhibited, and never respond to any radio ID query, dynamic regroup, OTAR nor radio check. I've heard of folks using the Motorola XTS series with caution due to (understandably) a given system administrator(s) sending inhibit commands that render the Motorola gear "bricked" until someone with proper expertise can unbrick it. These radios don't drop control channels like the Uniden/Bearcat type scanners and are actually submersible & usable as 2-meter, business, or public safety, etc. radios as a particular end-user may be authorized and licenced. I see the tow truck guys with Motorola gear but seldom with EFJ gear...I'm guessing the volume of Motorola surplus far exceeds EF Johnson and/or its a familiarity issue?