[aprssig] radio aprs vs internet aprs

Tom Hayward esarfl at gmail.com
Tue Mar 20 16:49:48 CDT 2012

If your computer runs Windows, I recommend APRSIS32 software:

If you're running Linux, check out aprx:

You only need one i-gate for your area, so if you already have one
then all you'll be doing by setting up your own is adding redundancy.
Redundant i-gates aren't a problem. The only time an additional i-gate
is a problem is when it's only half an i-gate--if set up as a
receive-only i-gate, messages won't gate from Internet->RF, so don't
bother setting up an i-gate unless you're planning to allow it to


On Tue, Mar 20, 2012 at 15:41, Mike Goldweber <mike at mikegoldweber.name> wrote:
> Hi Tom,
> My friend did mention the I-Gate, so I probably didn't understand what he
> meant.
> I do like the project you mentioned.  I do like the idea of having both sets
> of data available to me.  I have the equipment, so it sounds like it is just
> a matter of setting it up and then running the I-Gate software?  Is there
> something specific I should look for?
> Thanks again,
> Mike
> -------- Original Message --------
> Subject: Re: [aprssig] radio aprs vs internet aprs
> From: Tom Hayward <esarfl at gmail.com>
> Date: Tue, March 20, 2012 10:13 am
> To: TAPR APRS Mailing List <aprssig at tapr.org>
> On Tue, Mar 20, 2012 at 07:23, Mike Goldweber <mike at mikegoldweber.name>
> wrote:
>> The next day I ran into the guy who organized and ran the communications.
>> He told me that he got the message when he linked his system to the
>> internet, but during the race he comm's trailer was not linked to the
>> internet, which is why he did not receive my message immediately.
> This statement is misleading. RF APRS and APRS-IS are both realtime
> networks, and so data must be received immediately or not at all. The
> only way he could have seen your message a day later is by referencing
> an archived history of APRS-IS data (e.g., aprs.fi, findu, or his
> personal log).
> Think of APRS-IS as just another frequency, lets call it 2.4 GHz. He
> was on 144.39 MHz and you were on 2.4 GHz, so normally you wouldn't be
> able to communicate. I-gates exist to gate messages between networks.
> If there was a properly configured I-gate in your area, your message
> would have been passed from "2.4 GHz" to 144.39 MHz and your friend
> would have received it. It sounds like your area does not have a
> transmit-capable I-gate. I-gates are easy to operate once you collect
> all the required equipment (antenna, 2m radio, TNC, computer, and
> Internet connection). This may be a good project for you to pursue.
> Tom KD7LXL
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