Basic Safety Radios Requirements

August 28, 2016

I dont think I have written this up before

Basic requirements for public safety radios

1. 99% portable to portable, and portable to dispatcher comms,

everywhere in primary service area

2. 100% line of sight portable to portable coverage nationwide - (in

other words - maybe a couple of nationwide channels have to be set

aside for simplex use - no infrastructure is needed)

3. 95% portable to 'some dispatcher' outdoor coverage nationwide - in

other words, on at least one channel, a portable radio will be able to

reach at least 1 dispatcher nearly everywhere in the USA

4. 100% mobile to dispatcher coverage nationwide on at least 1 channel

5. on easy to access channels

Bottom line - this could be accomplished with just one repeater pair

actually - you could have 1 channel pair designated nationwide as

"Nationwide Channel 1" - portable to portable comms could be done on

the output side of the repeater pair

The ultimate goal here is to provide nationwide service for any

portable public safety radio - no matter where in the USA the radio is

located. Maybe 453.2125 R could be the channel - or 851.0125 R - or

maybe a VHF pair.

Another way to state the goal is - no matter how far an ambulance

transports a patient, no matter how far a fire truck responds to a

call, no matter how far a cop chases a perp, the radio will never go

out of range of at least 1 dispatcher.