[TrunkCom] Control Frequency Only Mode

Wed Oct 26 20:59:05 EDT 2005

Hi Jerry, I was logged on here too, and when I get E-mails I reply to them
immediately.  That is right about P025, and you can have up to 65000 TGS
there and that is far more then 4096 on type II systems.

On Wed, 26 Oct 2005, JERRY NONE wrote:

> Thanks Jeff.
> Sorryu about that but I didn't think that anybody
> woul;d of responded this fast.  I was going to say
> "DISREGARD" after I read one of the messages but ops,
> to late.
> Hey thanks again for the info.
> I also understand that Pure P-25 starts off @ 1
> instead of 16.  Does that mean that it goes
> 1,2,3,4,5,6...instead of 16,32,48,60,...
>
> --- Jeff Kenyon <at649 at tcnet.org> wrote:
>
> > Hi Jerry, As stated earlier in this thread Motorola
> > has a channel
> > assignment all set up for their systems in the
> > 800-900 MHz range, and then
> > base and offsets for the VHF/UHF trunking systems.
> > With EDACS and LTR
> > systems the controler will just tell the radio to go
> > to logical channel
> > number (LCN) 1 for a call and the LCNS for LTR and
> > EDACS do not correspond
> > to any frequency, but rather is what the system
> > programmer decides.  I am
> > not sure about MPT-1327 or TETRA, but Passport is
> > another form of LTR
> > trunking as is Multi-net.  Multi-net is used for
> > public safety users and
> > has other features such as priority cuing, and
> > emergency calls, etc.  I'm
> > not sure about Passport, but a lot of public safety
> > agencies are using
> > passport too.
> >
> >
> >
> >
> >
> > On Wed, 26 Oct 2005, JERRY NONE wrote:
> >
> > > You well aren't the LCN channels?
> > > As in Logic Channels?
> > > I am a little confused here.
> > > MOTO has a band plan channel and EDACS and LTR
> > have
> > > Logic Channels?  What is the difference?
> > > Do Passport, Multi-Net, ESAS, & MPT have Channels
> > too?
> > > What about Tetra?
> > >
> > > --- Jeff Kenyon <at649 at tcnet.org> wrote:
> > >
> > > > We need LCN's for EDACS and LTR because they are
> > > > different trunking
> > > > formats.  EDACS and LTR radios, by contrast have
> > all
> > > > the LCNS programmed
> > > > in the same order as you would program them into
> > > > your scanner.
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > On Wed, 26 Oct 2005, JERRY NONE wrote:
> > > >
> > > > > So then why don't we need the L.C.N.s or
> > Channel
> > > > > Numbers for Motorola but we need them for
> > EDACS
> > > > and
> > > > > LTR?
> > > > >
> > > > > --- bearcat <rwnewbould at comcast.net> wrote:
> > > > >
> > > > > > Each 800/900 mhz freq has been aasigned a
> > > > channel
> > > > > > no.  The control
> > > > > > channel data from the system tells the units
> > > > which
> > > > > > channel no. (hence
> > > > > > freq) to go to.  The scanner gets the
> > > > information
> > > > > > from the system
> > > > > > control channel so they can add as many new
> > > > sites as
> > > > > > they need and the
> > > > > > data will then be on the system control
> > channel
> > > > so
> > > > > > the scanner handles
> > > > > > if just fine.  This is why rebanding is such
> > and
> > > > > > issue the channel no.s
> > > > > > being sent will make no sense to the
> > scanner.
> > > > The
> > > > > > advantage to using CC
> > > > > > only programming is that if something would
> > > > change
> > > > > > on the system the
> > > > > > scanner user will never miss a beat.  If you
> > > > have
> > > > > > all of the freqs
> > > > > > programmed in a a new site is added you will
> > not
> > > > > > hear it.
> > > > > >
> > > > > > This is explained to the best of my limited
> > tech
> > > > > > knowledge
> > > > > >
> > > > > > Rich
> > > > > >
> > > > > > -----Original Message-----
> > > > > > From: trunkcom-bounces at mailman.qth.net
> > > > > > [mailto:trunkcom-bounces at mailman.qth.net] On
> > > > Behalf
> > > > > > Of JERRY NONE
> > > > > > Sent: Monday, October 24, 2005 10:58 AM
> > > > > > To: Discussion of Monitoring Trunk Radio
> > Systems
> > > > > > Subject: Re: [TrunkCom] Control Frequency
> > Only
> > > > Mode
> > > > > >
> > > > > >
> > > > > > Does anybody have a copy of this band plan?
> > > > > >
> > > > > > --- Jeff Kenyon <at649 at tcnet.org> wrote:
> > > > > >
> > > > > > > Hi Jerry, a scanner that doesn't support
> > > > control
> > > > > > > only mode will have the
> > > > > > > frequencies as reference to go to for a
> > > > > > > transmission.  In control channel
> > > > > > > only mode, the scanner follows the
> > specific
> > > > band
> > > > > > > plan that Motorola has
> > > > > > > set up for its various bands such as 800
> > and
> > > > 900
> > > > > > MHz
> > > > > > > trunking so that is
> > > > > > > how this is all possible, and with control
> > > > only
> > > > > > mode
> > > > > > > you can hear all the
> > > > > > > transmission, and any subsequent
> > transmission.
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > On Mon, 24 Oct 2005, JERRY NONE wrote:
> > > > > > >
> > > > > > > > Question.  Okay, say for instance you
> > have a
> > > > > > radio
> > > > > > > > scanner that does NOT do Control
> > Frequency
> > > > Only
> > > > > > > Mode.
> > > > > > > > So you program in all the frequencies.
> > So
> > > > when
> > > > > > > the
> > > > > > > > Controller tells Talk group 336 to go to
> > a
> > > > > > > frequency
> > > > > > > > of 868.7125, how does a radio scanner in
> > > > Control
> > > > > > > > Frequency Only Mode know NOT to go that
> > > > > > frequency.
> > > > > > > > Instead the message is heard on one of
> > the
> > > > > > Control Frequencies.
> > > > > > > > Also by being in Control Only Mode,
> > > > > > > does
> > > > > > > > this prevent the radio scanner from
> > hearing
> > > > all
> > > > > > > the
> > > > > > > > transmissions?  I mean if the system you
> > are
> > > > > > > > monitoring has seven frequencies and
> > then
> > > > adds
> > > > > > > three
> > > > > > > > more frequencies to accomodate extra
> > users
> > > > but
> > > > > > the
> > > > > > > > Control Frequencies remain @ the same
> > > > amount,
> > > > > > > won't
> > > > > > > > that cut off some transmissions?  What
> > > > happens
> > > > > > > then,
> > > > > > > > do you just hear the priority
> > transmisions?
> > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ========================================================================
> > > > > > > > County Of Medina Ohio County Scanner
> > Group:
> >
> === message truncated ===
>
>
> ========================================================================
> Southwestern Cuyahoga County Ohio, Parma Ohio & Strongsville Ohio Radio Scanner Group:
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> ------------------------------------------------------------------------
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