[Trunkcom] MultiNet

Sun, 06 Jan 2002 12:20:45 -0600

Only if you want them to have access to the new channels. The radios
will continue to operate with no problem. Howerver, if you program one
radio for that customer, make sure to program all or the ones without
the new chan will miss some transmissions. Everyone else will still hear
the radio that does not have the new freqs installed, without a problem.

Ken Roberts wrote:
> 
> In an LTR system, if you add new frequencies to the system, do all the
> radios have to be reprogrammed?
> 
> Ken Roberts
> [email protected]
> 
> ----- Original Message -----
> From: Larry Williams <[email protected]>
> To: <[email protected]>
> Sent: Sunday, January 06, 2002 12:57 AM
> Subject: Re: [Trunkcom] MultiNet
> 
> > We run LTR systems from La to Fl. In New Orleans, we have two 20 channel
> > systems, two five channel and one seven channel system.  The smallest
> > system we have has 3 channels, located in a rural area. We can chart
> > system load for any time of the day.  Very rarely do we get busys.  If
> > it starts to happen, we add a new channel.  When I say 3 conversations,
> > thats 3 actual speakers. By way of trunking, and people unkeying to
> > listen, you actually have more than three "conversations" going on at
> > the same time.The average key up time is short and most people have a
> > short delay between talker A unkey and talker B keyup.  They have to
> > stop and think what to say before pressing ptt.  The biggest culprit
> > for  busy channels is actually, interference, skip, if you will, even on
> > 800 and iden noise is one of the worst. Some customers who have long
> > winded talkers are welcome cause its easy to put up a new channel, and
> > the more they talk, the more we make.
> >
> > SJ wrote:
> > >
> > > --------Remember, if you have 3 channels in a system, there
> > > can only be 3 simultaneous conversations going on.------------
> > >
> > >  That's what I meant, really. I mean think about it, you have say 3
> > > channels,3 very busy channels at one given time. It just doesn't make
> any
> > > sense to put more than 3 agencies/businesses on that system, especially
> if
> > > one of them is public safety(I'm theorizing LTR here). 3 years ago when
> we
> > > had the ice storm, I had 2 scanners going on the county trunk system
> just to
> > > keep up. We had people using their old low band stuff just to keep in
> touch,
> > > quite confusing.
> > >  It is possible, however unlikely, that this will happen again.
> considering
> > > the cost of the system, one would think they would have added a couple
> more
> > > freqs.
> > >
> > > -----Original Message-----
> > > From: [email protected]
> > > [mailto:[email protected]]On Behalf Of Larry Williams
> > > Sent: Saturday, January 05, 2002 10:36 PM
> > > To: [email protected]
> > > Subject: Re: [Trunkcom] MultiNet
> > >
> > > Man, you must not have much excitement in life if you have to worry
> > > about "busy tones".  Remember, if you have 3 channels in a system, there
> > > can only be 3 simultaneous conversations going on. So many low end users
> > > think of it as a CB and use it accordingly. They are in their trucks and
> > > get bored so they talk to the other bored drivers. THAT, eats up air
> > > space. Especially on a multinet system or any other where you have
> > > selective calling between individual users.  5 chan system, 1 company,
> > > 20 bored long winded drivers, ... BUSY SIGNALS.  By the way, same goes
> > > for cops and public service folks as well.
> > >
> > > It would be interesting to see if someone was encountering a busy signal
> > > or two or  more.  At least when we made the move to the system here they
> > > told us about busy tones, and said that the chances of someone getting
> > > one
> > > were slim to none, but I heard that in Warren, Michigan they were
> > > telling
> > >  non public safety workers to quiet down because of busies.  By the way
> > > I
> > >  found out that Warren will be adding its old MDT channel to the trunked
> > >  system pool, because they just switched services, so the 856.0375 will
> > > soon
> > > be part of the system.
> > >
> > > ------------------------
> > > >snip<
> > > Come on now. The only way you heard the LTR burst on the bus radios was
> > > if it was running conventional on the same freq as the LTR channel.  If
> > > it was LTR, the radio had to either been modified or defective.  The
> > > only thing you can "HEAR" on an LTR channel burp is the squelch on your
> > > radio opening and closing, period. The NEW Kenwood LTR radios have what
> > > is called FleetSync where they send out MFSK data either at the
> > > beginning or end of transmission that contains a 7 digit code that is
> > > unique for each radio in a fleet. It can also be used to send canned
> > > status messages or even short and long data messages like a MDT. You can
> > > hear that data but its only been in use a couple of years.
> > >
> > > >         Now, the LTR system that I used to have to listen to all the
> time
> > > > on 800 MHz in school like I said had the burst, and it was even coming
> in
> > > > over the bus radios.  This bus company is now on 900 MHz with I think
> a
> > > > conventional system but they are using CTCSS tones from what I've
> > > > noticed.  Aren't the newer LTR or multi-net systems using tones or
> data
> > > > bursts you can't hear?
> > >
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