[aprssig] New Project: WHERE-IS

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Thu Mar 9 10:47:06 CST 2017


Pete is correct that the base APRS message protocol for 3rd party 
packets fully supports RF messaging to/from non-AX.25-compatible -SSIDs 
on the APRS-IS.  The Kenwood line of APRS-capable radios fully support 
this.  However Yaesu's APRS radios cannot message to non-AX.25 -SSIDs 
nor will they ack messages received in 3rd party packets from such -SSIDs.

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

On 3/9/2017 10:11 AM, Pete Loveall AE5PL Lists wrote:
> The reason for the different SSIDs was because there were (may still be) misbehaving IGates that would not properly gate non-zero-through-15 SSIDs to RF.  The 3rd party header permits (and your D72 supports) non-numeric SSIDs in messages as long as the IGate supports non-numeric SSIDs being gated to RF.  Direct gating to RF (not using 3rd party format) is not supported by APRS-IS due to loops and other issues that occur.
>
> Hope this helps.
>
> 73,
>
> Pete Loveall AE5PL
> pete at ae5pl dot net
>
>> -----Original Message-----
>> From: aprssig [mailto:aprssig-bounces at tapr.org] On Behalf Of Fred Hillhouse
>> Sent: Thursday, March 09, 2017 8:07 AM
>> Cc: 'TAPR APRS Mailing List' <aprssig at tapr.org>
>> Subject: Re: [aprssig] New Project: WHERE-IS
>>
>> Since WHO-IS and WHO-15 have the same response, why not use WHERE-IS
>> and WHERE-15?
>>
>> The WHO -15 is useable from a mobile while I don’t believe WHO -IS works.
>> The 15 is made into a 4-bit code for TX whereas the IS will not resolve to four
>> bits. But I haven’t tried this from my D72 so I can’t be sure. From an internet
>> only client it doesn’t matter which one is used.
>>
>> Best regards,
>>
>> Fred N7FMH
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