[TrunkCom] Re: National Radio System

[JEFFREY MICHAEL KENYON]

The other thing to remember is the national 800 MHz freqs are their for
everyone, and then I have heard that when the 700 MHz band opens enough to
have the ability for national channels like that they will be in APCO-25
digital modulation.





On Wed, 7 Aug 2002, Michael W. Scheel wrote:

> A well designed system should have different levels of interagency alerts. Say you are in pursit in Texas into OK (to use your example) You would put out a call on AID and your call would go out every system within say 100 miles. But if you were in say the Northeast  your call would only hit the closest systems to the system you're on. NYC to Hawaii, why bother use the phone or
> email.
>
>  In the upper Midwest we have a privately owned network of EDACS systems covering most of Iowa and parts of IL,WI, MN,SD, & NE. While there are businesses on it. There are Public Safety & Works Agencies from Local on up the Federal level. An officer in Sioux City can talk via either the dispatch talkgroup or through a i-call to someone in Eastern Iowa. Actually I have heard
> this happen numerous times.
>
>     A well designed system can wonder wonders. But if you just spending money without oversight on what the users want or need. forget it.
>
> Chuck Boyle kb5rvv wrote:
>
> > Who would want to? I can see statewide linkups but anything more and you'd be getting into too many dedicated channels for the linkups. Would you have a different channel for each state or tie all the links into one nationwide channel that all agencies have to monitor or scan in case of emergency?
> >
> > I think the first would impractical for mobile equipment.
> >
> > The second is mildly thinkable, at least from a use standpoint. But even that could get irritating; say a pursuit runs from Oklahoma into Texas and the officer calls for help on the mutual aid channel. Not only do the involved agencies hear it but so does anyone listening to the link channels nationwide. It won't take much for people to start ignoring or turning off radios.
> >
> > A nationwide linkup would also be vulnerable to the same disasters that might take out cell-phone networks and at least with cell-phones, someone else laid out the capital investment to build the networks. That may sound strange coming from a ham, but I feel everything has a place in today's emergency planning: trunked radio, cell phones, and conventional radio.
> >
> > Instead of increased reliance on repeaters and computer-controlled trunk systems, I'd like to see a return to vhf-hi & lo simplex if only for backup communications.
> >
> > Chuck Boyle KB5RVV
> >
>
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