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Old July 10th 03, 05:48 PM
Roger Barker
 
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In article , Jack Twilley
writes
"Roger" == Roger Barker writes:


Jack Can you explain this behavior? I'm pretty sure the mobile
Jack station doesn't have a WIDE alias.

Jack KB5WIA*WIDE2-1APRS:$GPGLL,3759.519,N,12218.458,W,232104,A*3A
Jack KB5WIA*WIDE2APRS:$GPGLL,3759.519,N,12218.458,W,2 32104,A*3A

Roger KB5WIA has sent a frame, presumably -
Roger KB5WIAAPRS,WIDE2-2:Etc...
Roger and it has been digipeated by two WIDEn-N digis.

That would make sense except for the asterisks.

Roger The only slightly unusual thing about it is that most
Roger implementations of WIDEn-N, including Kantronics, will set the
Roger 'H' bit when the SSID is decremented to zero. With an
Roger AEA/Timewave TNC, which is what you appear to be using, the
Roger frame from the final WIDEn-N would be monitored as -

Roger KB5WIA*WIDE2*APRS:$GPGLL,3759.519,N,12218.458,W, 232104,A*3A
Roger (the difference is the '*' after the WIDE2)

None of the ~180k packets I have have two asterisks.


Sorry, typo. For a frame header decoded by an AEA/Timewave TNC, it
should of course have been -
KB5WIAWIDE2*APRS:$GPGLL,3759.519,N,12218.458,W,2 32104,A*3A

The main point being, that, as I said, most WIDEn-N digis set the 'H'
bit when the SSID is decremented to zero.

--
Roger Barker, G4IDE -
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