[nos-bbs] Collision avoidance

George (Skip) VerDuin k8rra at ameritech.net
Sun Aug 13 13:21:50 EDT 2006


Hey Steve - I need to be very accurate in this and can not take the
chance of mis-interpreting your input...

On Fri, 2006-08-11 at 11:10 -0400, Steven Stimpson wrote:

>  
> 
>  
>         ----- Original Message ----- 
>         From: George (Skip) VerDuin 
>         To: TAPR xNOS Mailing List 
>         Sent: Friday, August 11, 2006 10:40 AM
>         Subject: Re: [nos-bbs] Collision avoidance
>SNIP<
>         The repeat Packets. I have been complaining about this for
>         years with KISS. The
>         fault is not JNos or your Tnc, it is the fact that the ax.25
>         protocol is seperated
>         from the tnc and resides in your computer. the computer does
>         not know that your
>         tnc has been waiting 5 seconds to transmit frame number one,
>         so IN
>         the computer the frack timer expires, and the computer sends
>         it again. your only solution
>         is to set a really high frack timer.

I do find FRACK used in the 9612 TNC manual.  It makes sense.
I do not find frack used in the jnos 1.11 documentation under that name.

If you can, would you tell me exactly what timing parameters in jnos
implement the TNC FRACK timer function?
In addition, can you confirm that entering kiss mode locks out the TNC
frack timer so there is no timer-race?

>          this will slow things down, but will stop
>         the DUP frames. I use KISS mainly on H.F. and the wait times,
>         at 300 baud,
>         between frames can be great, and we run into this problem a
>         lot. This problem
>         would also be solved if the TX'ing stations would reduce
>         maxframe and paclen.

>From your experience, could you pass on the set of all (TNC and
software) parameters that work well together at 300B HF kiss?

>          
>SNIP<
>          
>         Steven N1OHX
>          
> 
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73
de Skip k8rra k


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