On Tue, 28 Sep 1999, Dirk Koopman wrote:
> On 28-Sep-99 Samuel A. Falvo II wrote:
> > I'm looking for the physical characteristics for AX.25, as used on the VHF
> > bands. Any ideas? Would they be on tapr.org? (Of course, I'll look there
> > anyway, but it doesn't hurt to ask.)
>
> layer 1 = bell 202 tones.
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.
--
--- Tomi Manninen / [EMAIL PROTECTED] / OH2BNS @ OH2RBI.FIN.EU ---
