20 Feb
2000
20 Feb
'00
11:09 a.m.
----- Original Message -----
From: Shawn T. Rutledge <rutledge(a)cx47646-a.phnx1.az.home.com>
To: <classiccmp(a)classiccmp.org>
Sent: Thursday, 17 February 2000 9:28
Subject: Re: Ham population stats
> Stupid question: what comes out of the other
side of a ham TNC these
days?
> It used to be Bell 202 modem tones at 1200 baud
HDX, over an FM voice
signal,
> it *can't* still be that easy though can it?
Some place I still have
the
Yeah 1200 baud AFSK hasn't changed but there are many new methods of
doing more-reliable data transfer on HF and also faster speeds on other
frequencies.
It would be very cool to be able to use AX.25 Packet from a Vax running VMS.
I have seen native AX.25 support for linux, so I guess it wouldn't be too
hard
to do in VMS. I'd REALLY like to see the support for Baycom modems
that linux has too. (TNC's are grossly overpriced - even now).
Not sure how you'd do it on a DMB32 or similar though, don't know enough
about the hardware or how the o/s talks to it. It's unlikely you could do
the
same thing exactly the same way.
On a pc it uses the serial port handshaking lines (presumably so slower
machines wouldn't miss something whilst the TNC emulation TSR was
busily translating the raw AX.25 - something I suspect is not really
necessary
unless it's a REALLY slow machine (at 1200bps anyway).
I suspect if a Vax can cope with an asyncronous decnet connection @ 9600 on
a DMB serial port, AX.25 TNC emulation @ 1200 should be no problem....
Hmmmm......
Cheers
Geoff Roberts
Computer Systems Manager
Saint Mark's College
Port Pirie, South Australia.
Email: geoffrob(a)stmarks.pp.catholic.edu.au
netcafe(a)pirie.mtx.net.au
ICQ #: 1970476