Some recent discoveries of new control channels in the federal UHF bands have indicated that these trunked systems are part of a larger trunked system core, using the system ID of "3CD".
This is a single system core that is managed by Motorola Federal Solutions. They call it the Managed Zone Core:
Motorola drops trunked sites as needed and then leases sites on this core to various federal locations or facilities that don't have the budget to build a system from the ground up.
So far, a majority of the sites seem to be at Department of Veterans Affairs medical centers and hospitals. But a number of sites in multiple states are utilized by the Center for Disease Control (CDC).
While all these sites and agencies share the system core controller, they are not interconnected with each other. Each operates like it was a standalone trunked system. I do think some of the VA sites in Florida may be networked to each other, as I did hear some testing early on that was identifying various sites for test counts.
System ID 3CD
WACN BEE00
Flavor Phase 2
Centers for Disease Control (CDC)
Tower 1-41 Atlanta, GA
406.1125, 407.8125, 409.3000, 410.0375
Tower 1-42 Chamblee, GA
406.7750, 408.4375, 408.6375
Tower 1-43 Lawrenceville, GA
408.8375, 409.0375, 409.2375
Tower 1-44 Ft. Collins, CO
408.8375, 409.2375, 409.9375, 410.0375
Miami VAMC
Tower 1-33 Miami, FL
408.0000, 409.3250, 409.5125
Orlando VAMC
Tower 1-11 Orlando, FL
406.5000, 407.8625, 408.2375, 409.4375
Coatsville, PA VAMC
Tower 1-66 Coatsville, PA
170.1875, 170.5875, 172.6875
Jesse Brown VAMC, IL
Tower 1-04 Chicago, IL
407.8375, 408.2375
There are probably more federal facilities that may end up using this system core, so keep an ear out for P25 control channels in your area that have the system ID of 3CD!
