If QRM-Tor III modems did listen for a busy channel, much less traffic would get through. Thurston Howell won't be able to send free email from his luxury yacht, possibly hurting sales of modems. Don't count on it ever happening. PactorIII/WinLink is a commercial for profit enterprise that happens to use amateur frequencies under current rules, unfortunately. I wish those rule loopholes to be closed someday, but I may be dreaming.
On 6/21/06, Dave Bernstein <[EMAIL PROTECTED]> wrote: > > Yes. This was well-demonstrated in SCAMP, a soundcard-base protocol > that was beta-tested but never operationally deployed. For protocols > like Pactor-2 and Pactor-3 whose implementation evidently requires > an outboard modem, busy detection could be implemented either with > additional hardware, with modifications to the embedded software, or > both. > > Steve K4CJX has said that some SCS modems provide busy frequency > detection, but I don't know what models provide this function, or > what sorts of signals can be detected. I do know that no automatic > station control software currently uses busy frequency detection to > refrain from transmitting when the frequency is in use. > > 73, > > Dave, AA6YQ > > > --- In digitalradio@yahoogroups.com <digitalradio%40yahoogroups.com>, Bill > Turner <[EMAIL PROTECTED]> wrote: > > > > ORIGINAL MESSAGE: > > > > At 07:30 AM 6/21/2006, Dave Bernstein wrote: > > > > >the automatic station control software > > >immediately responds to an incoming request whether the frequency > is > > >locally clear or not. > > > > *********** REPLY SEPARATOR *********** > > > > Couldn't this be cured by software? The automatic station should > only > > respond to an incoming request if the channel is free of other > signals. > > > > Bill, W6WRT > > > > > -- 73, Craig Cook - N7OR in Sandy, OR [Non-text portions of this message have been removed] ------------------------ Yahoo! Groups Sponsor --------------------~--> Great things are happening at Yahoo! Groups. See the new email design. http://us.click.yahoo.com/TISQkA/hOaOAA/yQLSAA/ELTolB/TM --------------------------------------------------------------------~-> Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
