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[aprssig] Application Identifier (was: What sets the max packet length for APRS)

Steve Noskowicz noskosteve at yahoo.com
Mon Dec 3 00:04:33 UTC 2012


 
What is the significance of the APN prefix?  I see that APNK01 is "another" D700 TOCALL.  Does APNxx imply "Network nodes, digis, etc" for everyting with that  three letter prefix?  
 
SO... 
Set up a D700 as a digi, change the TOCALL to APNK01...?
Set up a D7 as a digi, change the TOCALL to APNK00...?
 
Set up a D710 as a digi, change the TOCALL to APNK02...?
Set up a D72 as a digi, change the TOCALL to APNK03...?
 
  Like that?
 
...and...
Is this a typo:  APR102  Kenwood D710   "R" ??

 
73, Steve, K9DCI USN (Vet) MOT (Ret) Ham (Yet)

--- On Sun, 12/2/12, Lynn W. Deffenbaugh (Mr) <ldeffenb at homeside.to> wrote:


From: Lynn W. Deffenbaugh (Mr) <ldeffenb at homeside.to>
Subject: [aprssig] Application Identifier (was: What sets the max packet length for APRS)
To: "TAPR APRS Mailing List" <aprssig at tapr.org>
Date: Sunday, December 2, 2012, 12:39 PM




Ordinarily I thought you ask for AP followed by 2 characters with 2 variables at the end, not three.  But...

http://www.aprs.org/aprs11/tocalls.txt says:


 APN  APNxxx  Network nodes, digis, etc
      APN3xx  Kantronics KPC-3 rom versions
      APN9xx  Kantronics KPC-9612 Roms
      APNAxx  WB6ZSU's APRServe
      APNDxx  DIGI_NED
      APNK01  Kenwood D700 (APK101) type
      APNK80  KAM version 8.0
      APNKMP  KAM+
      APNMxx  MJF TNC roms
      APNPxx  Paccom TNC roms
      APNTxx  SV2AGW's TNT tnc as a digi
      APNUxx  UIdigi
      APNXxx  TNC-X  (K6DBG)
      APNWxx  SQ3FYK WX/Digi  http://sq3fyk.com/?page_id=391
 APU  APU1xx  UIview 16 bit applications
      APU2xx  UIview 32 bit apps
      APU3xx  UIview terminal program
In actual usage, APNxxx is pretty busy:





[138] 
APN
0
1900

[139] 
APN001
0
279

[140] 
APN123
0
291

[141] 
APN232
0
42

[142] 
APN290
0
4

[143] 
APN313
0
1

[144] 
APN360
0
347

[145] 
APN370
0
637

[146] 
APN381
0
279

[147] 
APN382
0
147543

[148] 
APN383
0
121194

[149] 
APN383-9
0
1

[150] 
APN384
0
330

[151] 
APN390
0
29492

[152] 
APN391
0
219413

[153] 
APN392
0
2437

[154] 
APN393
0
934

[155] 
APN39L-9
0
1

[156] 
APN3DE
0
1

[157] 
APN3T1
0
1

[158] 
APN682
0
329

[159] 
APN700
0
540

[160] 
APN83
0
217

[161] 
APN832
0
109

[162] 
APN91
0
1328

[163] 
APN910
0
1319

[164] 
APN982
0
4863

[165] 
APN984
0
731

[166] 
APN990
0
964

[167] 
APN991
0
2858

[168] 
APNARM
0
476

[169] 
APND0U
0
167

[170] 
APND0X
0
3731

[171] 
APND0Z
0
990

[172] 
APND10
0
1865

[173] 
APND11
0
4143

[174] 
APND12
0
4

[175] 
APND13
0
4695

[176] 
APND14
0
2684

[177] 
APND34
0
204

[178] 
APNFOX
0
194

[179] 
APNI
0
1

[180] 
APNK01
0
304

[181] 
APNK82
0
171

[182] 
APNKMP
0
897

[183] 
APNP
0
118

[184] 
APNP20
0
285

[185] 
APNP50
0
3609

[186] 
APNP8C
0
1

[187] 
APNQ5N
0
1

[188] 
APNR91
0
1

[189] 
APNRCH
0
211

[190] 
APNTC2
0
154

[191] 
APNU-1
0
88

[192] 
APNU-X
0
600

[193] 
APNU12
0
919

[194] 
APNU18
0
4695

[195] 
APNU19
0
118089

[196] 
APNU19-1
0
77

[197] 
APNU19-2
0
160

[198] 
APNU19-3
0
11280

[199] 
APNU3B
0
37355

[200] 
APNUNU
0
1

[201] 
APNURA
0
94

[202] 
APNV50
0
1

[203] 
APNW01
0
31209

[204] 
APNX01
0
8003

[205] 
APNX02
0
5106

[206] 
APNX16
0
1277

[207] 
APNX2
0
451

[208] 
APNX30
0
558

[209] 
APNXOB
0
250
APUxxx is ...





[338] 
APU16K
0
108

[339] 
APU16N
0
4266

[340] 
APU18A
0
991

[341] 
APU1GN
0
1

[342] 
APU203
0
184

[343] 
APU24
0
569

[344] 
APU24N
0
1

[345] 
APU24P
0
799

[346] 
APU250
0
39

[347] 
APU253-7
0
1

[348] 
APU256
0
1040

[349] 
APU25D
0
89

[350] 
APU25E
0
1

[351] 
APU25H
0
1310

[352] 
APU25J
0
237

[353] 
APU25M
0
262

[354] 
APU25N
0
876184

[355] 
APU25N-13
0
1

[356] 
APU25N-2
0
1

[357] 
APU25N-3
0
1

[358] 
APU25N-4
0
1

[359] 
APU25N-5
0
1

[360] 
APU25V
0
2

[361] 
APU29N
0
1

[362] 
APU2KU
0
1

[363] 
APU2Y9
0
1

[364] 
APUAPU
0
1

[365] 
APUARM
0
177

[366] 
APUCMD
0
1

[367] 
APUN10
0
5636

[368] 
APUO5N
0
1

[369] 
APUP5N
0
1

[370] 
APUU5N
0
1

[371] 
APUWX
0
1020

[372] 
APUX5N
0
1
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

On 12/2/2012 12:09 PM, Bryan Hoyer wrote:


Thanks for clearing this up.

How do I reserve APNxxx or APUxxx for NW Digital Radios? i looked in APRS101 and see it isn't currently in use. 


Thanks,
Bryan



On Nov 10, 2012, at 4:21 PM, Robert Bruninga <bruninga at usna.edu> wrote:




The original texting APRS radio, the D7 can only display 45 bytes of Messages.  The D700 displays 64.
The VX8R etc I think displays 80 maybe.
 
Just remember, limiting to 45 charageceters will ALWAYS work and be seen by everyone.  Anything longer is risking miss-commmunication. 
 
But yes, they can be longer if you KNOW who you are sending to.  That is why the APxxxx identifies the type of radio in all packets, so we can see what their capabilities are.
 
Bob, WB4APR
 
 


From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf Of Bryan Hoyer
Sent: Saturday, November 10, 2012 11:22 AM
To: TAPR APRS Mailing List
Subject: [aprssig] What sets the max packet length for APRS
 
APRS1.01 states 67 characters for a message and up to 43 for a comment, yet I see packets twice that long on APRS.FI. This ones 109 after the :

 

KA8OAD-1>APU25N,K8YSE-1,WIDE1,K8UI-1,WIDE2*,qAR,K8LI-1:@101613z4108.09N/08136.25W_190/004g005t057r000p020P020b10220h51FWX_http://pages.sssnet.com/kend Fairlawn,OH

 

AX.25 says 256 bytes for the UI payload

 

A Tweet is 140 characters

 

An SMS is 160 characters

 

Is it just the display limit of some radios?

 

Just exploring the capabilities and limitations of APRS

 

Thanks!

Bryan Hoyer - K7UDR

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