[arm-allstar] DTMF

David McGough kb4fxc at inttek.net
Tue Aug 2 01:11:05 EST 2016 

Also, confirm that the CDM750 is programmed for wide-band FM, not 
narrow-band, which is the current commercial requirement.


On Tue, 2 Aug 2016, Doug Crompton via arm-allstar wrote:

> Roselito,
> 
>  But you have other nodes there that work fine with the same handhelds? Do you have other CDM750's that work? Are using speaker or undeemphasized audio from it?
> DTMF keypad frequencies 


> 
1209 Hz
1336 Hz
1477 Hz
1633 Hz


697 Hz
1
2
3
A


770 Hz
4
5
6
B


852 Hz
7
8
9
C


941 Hz
*
0
#
D
> 73 Doug
> WA3DSP
> http://www.crompton.com/hamradio
> 
> 
> Date: Mon, 1 Aug 2016 21:09:41 -0700
> To: arm-allstar at hamvoip.org
> Subject: Re: [arm-allstar] DTMF
> From: arm-allstar at hamvoip.org
> CC: tolitski at hotmail.com
> 
> Hi Doug,
> I am using a Motorola CDM750
> 
> Best regards,
> Roselito De Los Reyes
> 
> On Aug 1, 2016, at 3:51 PM, Doug Crompton via arm-allstar <arm-allstar at hamvoip.org> wrote:
> 
> 


Ken,
> 
>  I think you answered your own question that with it on you often get falsing of voice. I totally agree with Dave that relaxing DTMF just masks a problem. We have never had that option turned on by default in our images and have had only a very small number of problems with DTMF most of which can be traced to either equalization problems or radios. The reason it was turned off was that the very small amount of users that might experience DTMF issues vs. the audio degradation that occurred with voice falsing was a reasonable trade off.
> 
> Since the problem is with more than one radio I suspect the node radio or audio path probably has an equalization problem. I can only say that having used many different radios over the years both at the node and into the node I have not experienced any problem and have never had to turn on relax. 
> 
> Also make sure you have the PL filter turned ON.
> 73 Doug
> WA3DSP
> http://www.crompton.com/hamradio
> 
> 
> > To: kb4fxc at inttek.net; arm-allstar at hamvoip.org
> > Date: Mon, 1 Aug 2016 22:22:49 +0000
> > Subject: Re: [arm-allstar] DTMF
> > From: arm-allstar at hamvoip.org
> > CC: n1dot1 at gmail.com
> > 
> > hi david
> > 
> > yes but I have had problems with my simplex link radio even after i have 
> > tried
> > adjust the de-emphasis settings and tried different various levels.
> > 
> > not all my radio's would decode properly. that is why i had turned it 
> > back on
> > and recompiled the allstar code.
> > 
> > Now why does jim dixon wb6nil have it on by default in the master 
> > allstarlink source tree
> > by default? there must have been a reason why he put that code in there 
> > and enabled it.
> > 
> > turning that back on stopped all my troubles with this dtmf stuff.
> > but then i had to deal with the false decoding from certain people's voices
> > when this was on.
> > 
> > ken n1dot
> > 
> > 
> > 
> > 
> > 
> > On 8/1/2016 10:13 PM, David McGough wrote:
> > >
> > > Ken,
> > >
> > > In 99% of the cases, RADIO_RELAX isn't the problem. The issue is typically
> > > either received audio levels or an equalization (meaning de-emphasis).
> > >
> > > I've -never- had a case where I needed to turn RADIO_RELAX on and don't
> > > have it enabled on a single system---and, all decode every DTMF digit just
> > > fine (including my Baofeng 888 portable systems).
> > >
> > > Anyhow, yes, there is a setting in V1.02 forward, where RADIO_RELAX can be
> > > dynamically turned on/off at runtime (to enable, set: dtmf_relax=1 in
> > > simpleusb.conf device stanza), no recompiling needed....However, this
> > > "solution" is probably just masking the real issue and ideally should be
> > > considered a temporary work-around while identifying the audio issue.
> > >
> > > 73, David Kb4FXC
> > >
> > >
> > >
> > > On Mon, 1 Aug 2016, Kenneth Grimard via arm-allstar wrote:
> > >
> > >> hi all
> > >>
> > >> in the hamvoip image radio relax is turned off this is what is causing
> > >> your issue's.
> > >> radio relax was turned off to prevent false decoding of dtmf digits from
> > >> a users voice
> > >> from punching small holes in the received audio but it cause some
> > >> problems with
> > >> some radio's where the some digits will not decode properly.
> > >>
> > >> in the standard allstar images from allstarlink.org radio relax is ON by
> > >> default not off.
> > >>
> > >> if you are running the beta code that is in 1.02 for the pi 3 this can
> > >> be turned back on.
> > >>
> > >> ken n1dot
> > >>
> > >>
> > >>
> > >> On 8/1/2016 8:25 PM, Roselito de los Reyes via arm-allstar wrote:
> > >>> Hi,
> > >>>
> > >>> I created a simplex node and got it working. One weird thing is that
> > >>> when I send DTMF commands, it does not detect the number 3 as seen
> > >>> through the CLI.
> > >>>
> > >>> Any thoughts?
> > >>>
> > >>> 73,
> > >>>
> > >>> Lito
> > >>> KK6OOS
> > >>>
> > >>>
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> > >>>
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> > >>
> > >>
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> > 
> > 
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