[Scan-DC] Montgomery FD Mutual Aid

Andy [email protected]
Mon, 28 Jul 2003 19:06:38 -0400


Interesting and coincidental!

I think I've just stumbled upon the answer to this.  I was just sitting here
listening to a Frederick Co. Mutual Aid response into MoCo and monitored the
TT TG 49180 operating in analog mode.  This TG was multi-selected with TT TG
3376, so a multi-cast patch was formed.  What I believe this translates into
is that Frederick County units must have an assigned TG on their own system
which is patched into MoCo's ASTRO system on that 49xxx TG.  Since the 49xxx
TG on the MoCo side is in analog only mode, its probably set up just for
Frederick County units, or for that matter any other 800 MHz jurisdiction
with an analog only TRS, like Carroll County, Alexandria and Arlington
Counties (Ya never know).  I could be totally wrong, but that's how it
appeared to me.  What's more is that last weekend I monitored TT TG49200 as
a mutual aid analog only TG.  It may be setup as dynamic regrouping, but
that's a little over my head on how that works.  So FDMA-4 might be that
analog patch from Frederick Co. units to the MoCo ASTRO system operations
TG's.

Andy

----- Original Message ----- 
From: "Jeff Krauss" <[email protected]>
To: <[email protected]>
Sent: Monday, July 28, 2003 08:29
Subject: [Scan-DC] Montgomery FD Mutual Aid


> For the incident at Dickerson over the weekend, Montgomery FD dispatcher
told Frederick units to switch their radios to FDMA-4 (I think it was 4).
> I presume that stands for Fire Department Mutual Aid.
> Is this one of the five 800 MHz NPSPAC mutual aid channels from the 1987
Public Safety National Plan?
> Or is it a VHF or UHF channel?
>
>
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