[arm-allstar] wireline tone control of repeater

[c b]

Brian

you exactly nailed it, the ptt is not much of a concern as it can be done
e&m style but the ability to change channels would be great.

i was hoping someone already thought of this.

thank you for your time

On Tue, Jan 28, 2020 at 4:19 PM "Brian Swann via ARM-allstar" <
arm-allstar at hamvoip.org> wrote:

> Doug,
>
> The way I read his request, he's looking for Tone Remote Control (TRC)
> which is an older analog standard for commercial radios. Typically a normal
> channel 1 keyup is 120ms of "High Level Guard Tone", which is 2175hz,
> immediately followed by 40ms of the F1 "Function Tone" which is 1950hz.
> Then the voice is gated through, and a continuous "Low Level Guard Tone" at
> a level of -30db (compared to full voice modulation) is sent along with the
> voice. The LLGT keeps the transmitter keyed. The transmitter drops out when
> the LLGT disappears.
>
> By using different function tones, you can change channels, or transmit PL
> stripped, or do other functions. Most base stations were fairly simple and
> didn't implement too many different functions.
>
> I don't think this is implemented in Hamvoip, although it might be. I don't
> think it would be very difficult to add in. The advantage would be that a
> lot of commercial surplus base stations speak this "language" by default.
>
> More info in the Wikipedia article
> https://en.wikipedia.org/wiki/Tone_remote
>
> Tone remotes send commands to a base station using *function tones*, a
> series of two tones in sequence. The first tone is 2,175 Hz and is 100-300
> milliseconds in length.[6]
> <https://en.wikipedia.org/wiki/Tone_remote#cite_note-6> The most common
> second tone is 1,950 Hz. The most commonly used tone sequence in tone
> remote controls is the channel 1 transmit command. The default for this
> command consists of a high-level 2,175 Hz followed by a lower-level
> 1,950 Hz. A continuous, low-level 2,175 Hz tone follows. Voice is
> multiplexed over the tone. So long as the 2,175 Hz tone is present, the
> transmitter remains on. An audio notch filter
> <https://en.wikipedia.org/wiki/Notch_filter> removes the 2,175 Hz
> low-level
> tone from the actual transmit audio. General Electric Mobile Radio called
> the high-level tone, '"Secur-it tone", and called the low-level tone "hold
> tone." In the industry, the low-level continuous tone is often called,
> *low-level
> guard tone*. The low-level tone is present at the same time as transmitted
> voice.
>
> Brian
> n1bs
>
> On Tue, Jan 28, 2020 at 5:53 PM "Doug Crompton via ARM-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
> > Chris,
> >
> >  I am not completely clear on what you want to do but the answer is yes
> you
> > can control a capable rig either through hardware or CAT control to
> change
> > frequency and other things using DTMF. See the howto on this at the
> > hamvoip.org web page which explains how to use GPIO bits to control BCD
> > channel changes on capable radios. Hamvoip also has hamlib installed and
> > using rigctl commands you can control many radios. It is up to the user
> to
> > implement this. Do  rigclt -l    at the Linux prompt to see all the
> > currently controllable rigs.
> >
> >
> > *73 Doug*
> >
> > *WA3DSP*
> >
> > *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
> >
> > On Tue, Jan 28, 2020 at 11:09 AM "c b via ARM-allstar" <
> > arm-allstar at hamvoip.org> wrote:
> >
> > > does allaratlink support tone control of a station?
> > >
> > > for instance using 2175 (switching to low level)  to PTT and using
> > > different tones to change channel?
> > >
> > > or at least the ability to send the correct tone to change channels via
> > > sending DTMF to the to allstar and then allstar sending the tome out
> the
> > > URI to the station?
> > >
> > > the application would be a continuous duty remoter using a mastr iii
> and
> > > making it multi channel by sending the correct tone to switch channels.
> > >
> > > thanks
> > >
> > > Chris
> > > _______________________________________________
> > >
> > > ARM-allstar mailing list
> > > ARM-allstar at hamvoip.org
> > > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> > >
> > > Visit the BBB and RPi2/3/4 web page - http://hamvoip.org
> > >
> > _______________________________________________
> >
> > ARM-allstar mailing list
> > ARM-allstar at hamvoip.org
> > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> >
> > Visit the BBB and RPi2/3/4 web page - http://hamvoip.org
> >
> _______________________________________________
>
> ARM-allstar mailing list
> ARM-allstar at hamvoip.org
> http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
>
> Visit the BBB and RPi2/3/4 web page - http://hamvoip.org
>