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M5WJF > UIVIEW 24.09.04 00:02l 177 Lines 5795 Bytes #999 (0) @ WW
BID : 500357M5WJF
Read: GUEST
Subj: Re: Call Suffix
Path: DB0FHN<DB0FOR<DB0SIF<DB0FHK<DB0ACC<DB0EA<DB0RES<ON0AR<EB2BJX<GB7YKS<
GB7YFS<GB7MAX
Sent: 040923/0022Z @:GB7MAX.#28.GBR.EU #:36036 [Bloxwich] $:500357M5WJF
From: M5WJF@GB7MAX.#28.GBR.EU
To : UIVIEW@WW
Hi Eddie,
I was waiting for the crescendo of responses to your query, but as that
didn't happen I did a bit of reading using Google.
SSID's seem to vary everywhere you look, indeed even Bob Bruninga WB4APR
doesn't list a set of SSID's.
Here's a few examples copied off the Net from around the World:
-0 Home Station, Home Station running IGate.
-1 Digipeater, Home Station running a Relay Digi, Wx Digipeater
-2 Digipeater [#2 or] on 70CM
-3 Digipeater [#3]
-4 HF to VHF Gateway
-5 IGate (Not home station) -6 is for Operations via Satellite
-7 Kenwood D7 HH
-8 is for boats, sailboats and ships (maybe 802.11 in the future)
-9 is for Mobiles
-10 is for operation via The internet only
-11 is for APRStouch-tone users (and the occasional Balloons)
-12 Portable Units such as Laptops, Camp Sites etc.
-14 is for Truckers
-15 is for HF
---------------------------
DIGIPEATING IN 1999: One of my original APRS digipeating ideas is yet to
be implemented. This is the -N routing by SSID only. This routing is the
same as the WIDEn-N except it dispenses with even the 7 bytes used with
WIDEn-N!. Since the "WIDE" in WIDEn-N is itself generic, it can be
eliminated compeletely as long as we have some way to indicate the -N
number of hops desired. -N routing uses the TOCALL SSID as the routing
indicator. Any TOCALL-N will indicate to the network that the packet is to
be digipeated N times. Thus we have not only eliminated another 7 Bytes
per packet, but opened up even further possibilites. The SSID routing
system has been built into all APRS Mic-Encoders in anticipation of the
implementation of SSID routing. This algorithm was necessary to keep the
Mic-E Bleep as short as possible so that it would be tolerated on voice
repeaters. Since hops beyond 7 show a deminishing probability of success,
the SSID's of 8 through 15 were reserved for DIRECTIONAL ROUTING according
to the following table:
-8 North -12 North DX
-9 South -13 South DX
-10 East -14 East DX
-11 West -15 West DX
-----------------------
Symbol and SSID
The symbol you choose is up to you, be it car, truck, bike, horse or
whatever suits your vehicle. Note that there are certain SSID's that are
used for some symbols. To be fully compliant with the APRS specifications,
it is recommended that you set your SSID as follows: (Icons are from
UI-View)
Other -0
Ambulance -1
Bus -2
Fire Truck -3
Bike -4
Yacht -5
Helicopter -6
Light Aircraft -7
Power Boat -8
Car -9
Motorcycle -10
Balloon -11
Jeep -12
RV -13
Truck (4x4) -14
Van -15
For example, if your beacon is set to a CAR, your callsign should be
VK2ABC-9
The reason for this is that the SSID determines the symbol to use for
trackers with no ability to choose a symbol, for example an NMEA GPS
feeding a normal TNC. All that makes it to the RF side is the $GPGGA NMEA
string, so the originating SSID determines the symbol used.
--------------------------
G0JXN-14>APU254,RELAY,TRACE3-3,WIDE3-3
=5143.11N\00001.71W-Cheshunt Herts. Jim. jim.g0jxn@ntlworld.com {UIV32}
G0JXN-14>APU254,WIDE6-6
=5143.11N\00001.71W-Jim {UIV32}
SSID
You will notice that in the frames above I have used a SSID of -14. Some
of the HF operators use this to signify that it is a 14MHz station in
order that it might be identified as such when it has been digipeated. On
30m -10 is used. This does unfortunately cause a problem for APRS stations
that use SSIDs to indicate the station classification i.e. HOME, CAR,
LORRY etc.
--------------------------
-1, 2, 3, 4 are for digipeaters and other home stations
-6 is for Operations via Satellite
-7 is for TH-D7 walkie talkies
-8 is for boats, sailboats and ships (maybe 802.11 in the future)
-9 is for Mobiles
-10 is for operation via The internet only
-11 is for APRStouch-tone users (and the occasional Balloons)
-14 is for Truckers
-15 is for HF
---------------------------
As the use of SSIDs appears such a mess, where ever you look, the above
averages out as:
-0 Home
-1 Home/Digipeater
-2 Home/Digipeater
-3 Home/Digipeater
-4 Home, but possibly HF to VHf Gateway
-5 Could be anything
-6 Satellite
-7 Kenwood Transceiver
-8 Some sort of Boat
-9 Mobile
-10 Most likely via the Internet
-11 A touch tone Balloon
-12 Could be anything
-13 Could be nothing
-14 Depends on your definition of Truck
-15 Most likely HF
Which doesn't make an awful lot of sense.
Mobiles based in Shropshire using Tiny-Trak (or similar) appear to use -2,
but if or when I set something up for Mobile I'll most likely be using -9,
as that SSID seems the most widely used for the purpose.
Amazing variation.
73 de Wayne M5WJF@GB7MAX.#28.GBR.EU
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Message timed : 01:21 on 23 Sep 2004
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