[TrunkCom] Control Frequency Only Mode

Thu Oct 27 09:39:32 EDT 2005

Right, and that is the case around the Detroit area.  The one 800 MHz
frequency that I thought originally was a trunked system for AMR is hardly
used, and I have heard that they may be pulling out of this area
altohgether, but for now they are just shuttling patients around.  We have
one system here that is labeled as unknown on radioreference.com, and is a
VHF system, but the frequency listed I know is just a paging frequency, at
least on my side of town, and I've never heard any LTR or other type os
data there, and the LTR system I mentioned earlier last night is gone, and
was the only one I know of on 800 MHz, though I think we may have a couple
of LTR systems on 900 MHz, but a vast majority of LTR systems here are
UHF, in the 420-424 MHz range or around 451-453 & 461-464 which all a long
has been allocated for business, and in my opinion i don't think the FCC
has done as well as they could with allocating these bands, in terms of
distances to ajacent users.  We had an LTR system that was using our
hospital's security frequency of 461.375.  Our medical center uses htis
freq conventionally, but without a radio with a PL you used to hear  te
data burst fromthe LTR system.

On Thu, 27 Oct 2005, JERRY NONE wrote:

> We have one VHF LTR TRS in the Cleveland Metro Area,
> tons of UHF ones.  Also one 900 LTR TRS that I can
> think of.  One UHF LTR uses one frequency on one site
> and two on the other.  I mostly hear the Ambulanc Co
> on it but rarely do I hear anything else.
> Plus it seems that alot of private ambulance companies
> use LTR.
>
> --- Jeff Kenyon <at649 at tcnet.org> wrote:
>
> > Right, though a lot of pages like radioreference.com
> > will list any system
> > regardless of type/useage.  Some information for
> > some federal and military
> > systems is restricted, but around my area a lone,
> > and other parts of the
> > state there must be a dozen or more LTR systems that
> > are used by
> > businesses or SMR users, and these are mostly UHF
> > systems in my area.  We
> > have two multi-net systems in Michigan that are both
> > supposed  to be
> > updated to P-25, but last time I was up near the
> > area that they are in
> > they were still LTR.
> > 	Also, some LTR systems only use maybe one or two
> > frequencies and
> > that is it.  In once case I knew with my old school
> > bus company they used
> > a two-cite LTR system with one frequency for each
> > cite, and the reason for
> > two cites was because they were contracted to cover
> > a large portion of
> > Detroit.  They are on conventional 900 MHz freqs
> > now, as their LTR freqs
> > are now owned by Nextel.
> >
> >
> >
> >
> >
> > On Wed, 26 Oct 2005, JERRY NONE wrote:
> >
> > > Well know the LTR part I can asnswer I think.
> > > This is because most scannists like to listen to
> > > Public Safety and/or Public Service.
> > > Most LTR systems are used for businesses with the
> > few
> > > expections out ther that are use for Public Safety
> > >
> > > Didn't Opto make something to help with that?
> > >
> > > Also on the FCC Adanced License search when can
> > plug
> > > in a frequendy search and it will tell you if it
> > is
> > > Trunked or NOT.  It will NOT tell you if it is
> > MOTO,
> > > EDACS, or LTR though.
> > > --- Jeff Kenyon <at649 at tcnet.org> wrote:
> > >
> > > > Hi Tom and the group.  I am surprised at thisas
> > I
> > > > thought that the lowest
> > > > freq was reserved for the CW ID, which is
> > something
> > > > else that our system
> > > > has never done.  I can also tell you that when
> > our
> > > > system was brought on
> > > > line for testing and training in 2001, because
> > of a
> > > > lot of security
> > > > reasons and due to internal term oil with an
> > > > individual that I won't talk
> > > > much about here on this list, those beginning
> > > > activities were done
> > > > exclusively by Motorola and the dealer here in
> > the
> > > > Detroit area.
> > > > 	I've also noticed that with LTR system
> > information
> > > > that is out
> > > > there it is harder to find exact LCN
> > information.
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > On Wed, 26 Oct 2005, Tom Swisher wrote:
> > > >
> > > > > Jeff Kenyon wrote:
> > > > > > Hi Tom and the group, while we are on the
> > > > subject of control channels, my
> > > > > > local system in Grosse Pointe here is the
> > only
> > > > one I konw of that the
> > > > > > control channel goes from lowest to highest
> > in
> > > > frequency range.  From
> > > > > > 866.5375 to 867.625, these are the first
> > four
> > > > control channels, and they
> > > > > > rotate daily, and all the other systems I
> > have
> > > > tracked have had the last
> > > > > > several freqs as control channels.  Why
> > would
> > > > this be that one with the
> > > > > > lowest freq would be the control channel?
> > > > >
> > > > > That's what was chosen when the system was set
> > up.
> > > > Any licensed trunking
> > > > > frequency could have been used, what you have
> > is
> > > > simply what they chose.
> > > > >
> > > > > Tom WA8PYR
> > > > > --
> > > > >
> > > >
> > >
> >
> -----------------------------------------------------
> > > > > Tom Swisher, WA8PYR
> > > > wa8pyr-scan at sbcglobal.net
> > > > >   "Restriction of free thought and free speech
> > is
> > > > the
> > > > >     most dangerous of all subversions. It is
> > the
> > > > one
> > > > >    un-American act that could most easily
> > defeat
> > > > us."
> > > > >           Justice William O. Douglas, 1953
> > > > >         WA8PYR Radio - http://www.wa8pyr.net
> > > > >
> > > > >
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