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[aprssig] APRS Calling

Robert Bruninga bruninga at usna.edu
Sun Oct 21 18:51:37 UTC 2012


> I've been working on a simple procedure for calling stations
> via APRS text messages as an alternative to voice calling....

This has been the #1 focus of APRS since 2001 when we came up with the
AVRS concept.  See http://aprs.org/avrs.html

You want to talk to someone anywhere on the planet, you send him a QSO
message and then the AVRS engine makes the connection via Echolink,
IRLP or Dstar or any other system.

Everything is in place EXCEPT the Dstar, the Echolink and IRLP
gateway.  Even Kenwood and Yaeus have built-in the auto-QSY feature at
the push of a button.  John Gorkos has writen a preliminary AVRS
engine that will tell you where the VOIP node are, but we still dont
have the automatica AVRS engine to glue it all together.

Bob, WB4APR

On Sun, Oct 21, 2012 at 2:12 PM, Robert Carleton <rbc at rbcarleton.com> wrote:
> I've been working on a simple procedure for calling stations via APRS text
> messages as an alternative to voice calling. I thought I'd float it with the
> APRS community for comment.
>
> APRS calling borrows ideas implemented in Digital Selective Calling, a part
> of the Global Maritime Distress Safety System. The idea is to replace
> monitoring voice calling frequencies with APRS monitoring. APRS calling
> provides procedures for contacting stations that are operating APRS, but not
> monitoring voice. ITU Q codes are used in conjunction with APRS text
> messages to implement APRS calling.
>
> 1) The calling station sends a QSX signal to the station or group they wish
> to reach using an APRS text message. The QSX should include the frequency
> for voice contact. The calling station may wish to include offset and CTCSS
> or DCS information.
> 2) The called station or stations reply with an answering QSX via an APRS
> text message.
> 3) The stations shift communications to the arranged voice channel.
>
> That's the whole thing. I'd be grateful for any feedback.
>
> Best,
>
> --Bruce (KJ6VVJ)
>
>
> Robert "Bruce" Carleton
> Emergency Coordinator
> NALCO ARES/RACES
>
>
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