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[aprssig] APRS Voice Alert

Robert Bruninga bruninga at usna.edu
Wed Sep 7 16:14:18 UTC 2005

>>> dave at emv.co.uk 09/07/05 11:15 AM >>>
>I've read the TH-D7A/E manual several times 
>and not seen anything about any Voice Alert.

"Voice Alert" is not a Japanese invented setting.
It is a term we use to describe the simple APRS
action of:

1) Not turning down your D7/D700 APRS volume
2) But using CTCSS 100 to mute the APRS speaker instead.

That is all there is to it.  What this gives
you is the added capabilities of:

1) Being able to HEAR someone who has an immediate
need to contact you.   Because everyone can see that
your APRS radio is on the national APRS channel.

2) Tags your packets with PL 100 so that others
that are listening will be aware of  your presence
-AND- know that you are listening.

3) Because you will hear PL100 packets, it alerts
you to the presence of another so-equipped mobile
who you also then -know- he is listening.

4)  Lets you raise that person by voice and QSY
as easily as pushing your PTT.

>We get the E version over here, and popular it is too.  
>The D700 is also popular[but higher] cost. 

Yes, so why not take full advantage of these dual 
band radios by -not- turning the volume down on half 
of it, but setting CTCSS to mute the speaker on the
APRS side instead.  This way, you have APRS, and
you have the Band B for all other voice uses... PLUS
you get a speaker on a single national frequency 
that can be activated within simplex range by anyone
that has an immediate need to contact you.

Bob, Wb4APR

> -----Original Message-----
> From: aprssig-bounces at lists.tapr.org 
> [mailto:aprssig-bounces at lists.tapr.org] On Behalf Of Robert Bruninga
> Sent: Wednesday, September 07, 2005 3:12 PM
> To: aprssig at lists.tapr.org 
> Subject: RE: [aprssig] APRS Voice Alert
> >>> dave at emv.co.uk 09/07/05 5:17 AM >>>
> >That's my other argument.  Most of APRS operators setups 
> wont support a 
> >Voice Alert in any case, whatever Bob my hope...
> Depends on what "most" means....
> It is a fact that 85% of all APRS mobiles that receive APRS 
> while mobile are using

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