On Wed, Sep 29, 1999 at 12:55:33PM +0300, Tomi Manninen OH2BNS wrote:
> Just to be sure we don't confuse anyone here: The AX.25 specification
> makes no attempt at defining layer 1 issues. It is however true that on
> VHF the most popular signaling method is AFSK with bell 202 tones (1200Hz
> and 2200Hz) with signalling rate of 1200 bps. Also HDLC bit stuffing
> and NRZI is used.
OK, we're getting somewhere. Now where can I find out more about this? I'm
aware that bitstuffing is used, but how is NRZI applied? Is 1200Hz the mark
or the space? Etc.
There should be some kind of written document on this. Looking at the
source code to TNC-2 is not sufficient for my needs, as my time is quite
valuable to me.
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