Here's a quick blurb on trying out the 'soundmodem' linux driver to do packet
radio through your soundcard on your linux box. This article is specific to
FEDORA CORE 3, which I just happened to have running on my machine at work.
Okay, so this is back in 2005, I should update this article to reflect the
current situation - ie, February 7, 2008 !

Date: Thu, 30 Jun 2005 11:53:56 -0500 (CDT)
From: maiko
To: TAPR xNOS Mailing List
Bcc: Thomas Sailer
Subject: AMAZING ! NOS and Thomas Sailer soundcard packet driver ...

Greetings all,

This is REALLY interesting - You have to read this !!! As an experiment,
this took me less than 5 minutes to get working. I'd like to see what it
can REALLY do in the field. Very impressive !

  http://www.baycom.org/~tom/ham/soundmodem/

installed the soundmodem driver on my fedora 3 box at work :

   rpm -ivh soundmodem-0.9-1.i386.rpm

configured it (basic afsk modulator, KISS packet i/o mode) :

   soundmodemconfig

started the soundmodem drive :

   service soundmodem start

AND then in my autoexec.nos, add something like the following :

   attach asy soundmodem0 - ax25 vhf 4096 256 1200
   ifconfig vhf description "sndcard"

Then ran JNOS, and tried a connect from the JNOS console :

   c vhf ve4rag

Amazing !!! Instant packet out the soundcard !!!

Of course you'll need to build a PTT interface (no big deal),
and you'll have to experiment with configuration and settings.

Maiko Langelaar / VE4KLM