[aprssig] KPC-3+ KISS mode delayed packet issue?

Greg Noneman gregn1 at cox.net
Fri Dec 19 11:56:45 CST 2008


I fought was this problem for some time on my IGate. It wasn't a  
constant problem, and would surface randomly.

I eventually gave up trying to fix it on the KPC-3 and just went to a  
TNC-2 based TNC.  The problem completely went away.


On Dec 19, 2008, at 9:33 AM, Tom Russo wrote:

> I seem to recall reading here some time back that there was some bug  
> in
> the KPC-3+ in KISS mode that could cause it to screw up and hold  
> packets
> for some reason.
> I'm seeing some very strange delayed packets in my local  
> environment, and
> since I'm running a KPC-3+ in KISS mode I'm wondering if it's my  
> fault.
> What it seems to be is that packets I am transmitting seem to be  
> getting
> digipeated 10 minutes or more later.  My logs show my transmitted  
> packet
> going out to the TNC, then sometime soon after a digipeat of a much  
> older
> packet coming back.  My current guess is that my packets are being  
> held at my
> TNC until my next transmission or something (this rings a bell about  
> the KPC
> holding until a buffer is full or something like that).  I want to  
> fix it if
> that's what's going on.
> Could someone refresh my memory about:
>  1) what the actual issue is that can cause KPC-3+ KISS-mode TNCs to  
> hold
>     off transmitting packets for as much as 10 minutes, if there is  
> in fact
>     such an issue
>  2) The correct way to fix it (is it as simple as power-cycling the  
> TNC?)
>  3) The best way to avoid the problem in the first place, if it is  
> in fact
>     my system that's causing the delay.
> -- 
> Tom Russo    KM5VY   SAR502   DM64ux          http://www.swcp.com/~russo/
> Tijeras, NM  QRPL#1592 K2#398  SOC#236        http://kevan.org/brain.cgi?DDTNM
>  In some cultures what I do would be considered normal.
>                                  -- Ineffective daily affirmation
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