APRS Internet to RF Igates
You will find no Igate set up instructions here. Why? Because running
an Igate that send Internet data out to the RF is an advanced use of
APRS.
In reality, there should be only one Igate for a 30 mile radius area.
This means that the data sent out to RF should AT MOST go only one hop,
or even better, NO HOPS!
Igates need to be coordinated so that packet traffic is kept to
minimum, overlaps are kept to a minimum, and only ONE Igate in a
specific area is in use at a time.
It is good for more that one station in an area to be able to be an
Igate, but only when the primary Igate station has failed and is off
the air.
Your willingness to be an Igate is appreciated, but, like digipeaters,
not every station needs to be one.
This excerpt from an Igate setup guide helps explain why too many
Igates or improperly setup Igates are a problem:
"APRS Internet
Gateways can transfer data between your local RF network and APRS
Internet Servers. Your local APRS network operates at 1200 bps
while your Internet connection may operate at several Megabits per
second. Obviously, the amount of data transferred from the
Internet to RF should be kept to a minimum. IGates can
selectively gate packets to RF from the Internet. Local packets
are often handled automatically. If a transient mobile station
comes into your IGATE area, packets from and to him will be
passed. Too many IGATE's in a local network is not a good thing,
especially if each is gating multiple identical packets to RF.
Duplicate gating of NWS watches, warnings, advisories, and other
weather related data can overwhelm a network during severe weather
outbreaks and preclude APRS spotters from exchanging information.
Excessive paths are another pervasive problem. The gating of
watches, warnings, and advisories into unaffected areas should not be
done."
In McMinn Co, KG4FZR-7 functions as a two way Igate, sending all data
it receives on RF to the internet, and sending only beacons and
messages to RF from stations that are in the McMinn Co area and
internet connected only, as well as WX data for this specific area
only.
Another station stands ready at a moments notice to serve as back up
should KG4FZR-7 be off the air.
PLEASE,
DO NOT CONFIGURE YOUR STATION AS AN IGATE!