From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gordon JC Pearce Subject: Re: ax25 and direct sound card connection Date: Fri, 19 Nov 2010 14:51:34 +0000 Message-ID: <1290178294.21069.27.camel@localhost.localdomain> References: Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-hams-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" To: linux-hams@vger.kernel.org On Fri, 2010-11-19 at 12:38 -0200, Eduardo wrote: > Hi, > > I have another fairly basic question. Before buying an actual radio, I > thought I can get some know how about using ax25 by connecting two > sound cards directly. Is that possible? > > I mean to connect two linux boxes by their sound cards directly and > use soundmodem (no radio between them)? Has anyone tried that? Can I > just connect the mic of the box1 to the speaker of box2 and the other > way around? It certainly is possible. You won't even need to worry about a PTT line, either. With a direct connection like that you ought to be able to get at least 19.2kbps using G3RUH mode. Using the mike and earpiece sockets of unmodified walkie-talkies you will only be able to use 1200bps AFSK. Gordon MM0YEQ