I heard over the weekend New Britain fire is now using automated voice dispatch for both fire and EMS. The dispatchers still talk to the units, including asking if a medic is available for a call, but the actual dispatch call is a computer. I think it's the first in the capitol region as far as...
Are you looking to ID a channel or simply looking for info? The automated voice works on VHF or UHF or 800, analog or digital, trunked or conventional, it is simply an add on to interface between a computer dispatch program and a radio system.
These are computer based systems and can be ported to any radio system if desired. They are actually designed for station alerting and don't have to be broadcast over the radio. When Boston implemented their system with the then new CAD system the plan was to stop broadcasting alarms over the air.
That was changed and the alarms are now broadcast.
In various parts of the country I have used allocution systems used on conventional, trunked, analog, and digital systems.