[aprssig] A Proposal for the Continuation of APRS / candidates for depreciation

Lynn W Deffenbaugh (Mr) KJ4ERJ at arrl.net
Mon Feb 14 11:18:54 EST 2022

The APRS 3rd party format enables non-AX.25 message sources (-SSIDs not 
in the 0 to 15 range including alpha-numerics) to send messages to AX.25 
over RF stations.  The base APRS message specification already supports 
sending messages to non-AX.25-compatible-SSID stations.

Eliminating 3rd party formats for (at least) messages gated to AX.25 
over RF effectively eliminates this capability.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

PS.  Kenwood APRS radios support messaging with non-AX.25 -SSID 
stations.  Unfortunately, Yaesu's APRS radios do not support this at 
this time, even though they DO support the 3rd party wrapper. The issue 
appears to be in their messaging subsystem, not in their packet parsing.

On 2/14/2022 11:03 AM, Andre wrote:
> I have seen a few good suggestions for formats that made sense in the 
> time but are no longer useful.
> I would like to add the 3th party format to this, when bob invented 
> this format it was based on tncs used in human interface to support 
> his zip lan idea.
> these tncs are nolonger in use for igates and for the recipient it is 
> not relevant how the message got to him so the overhead is wasted 
> information.
> In stead of this format it makes much more sense to format them just 
> like you would format a crossband digi with a smart digi truncating 
> the number of hops.
> this change does not have to effect how an igate works, all that info 
> is simply moved from the 3th party field to the ax25 level removing 
> all the overhead, normal igate filtering should prevent the packet 
> getting back to the internet by another igate.
> 73 de Andre PE1RDW
> _______________________________________________
> aprssig mailing list
> aprssig at lists.tapr.org
> http://lists.tapr.org/mailman/listinfo/aprssig_lists.tapr.org

More information about the aprssig mailing list