I saw but didn't pay much attention to an acoustic coupler located at
Fry's Electronics in Willsonville Oregon about a week ago. Next time
there I'll take another look.
George Rachor
=========================================================
George L. Rachor Jr. george_at_racsys.rt.rain.com
Beaverton, Oregon
http://racsys.rt.rain.com
United States of America Amateur Radio : KD7DCX
On Thu, 14 Oct 1999, Mark Green wrote:
> > >At 03:30 PM 10/13/99 -0700, Roger Sinasohn wrote:
> > >>Please respond to Tim directly at <astrl3_at_uaa.alaska.edu> if you can help...
> > >>
> > >>>Date: Mon, 11 Oct 1999 23:18:45 -0800
> > >>>From: Tim Long <astrl3_at_UAA.ALASKA.EDU>
> > >>>Subject: Acoustic modems?
> > >>>
> > >>>Hi! I am interested in purchasing an acoustic modem, but I have not been
> > >>>able to find one anywhere. First, are there any acoustic modems that are
> > >>>compatible with modern IBM-clone PCs?
> > >
> > >Certainly the use of a coupler limits the bandwidth of the signal
> > >that can be reliably exchanged. It worked in the days of two-tone
> > >300 baud, but I don't think it would stand a chance at 4800, 9600
> > >or above.
> > >
> > >- John
> >
> > Acoustic couplers, not the earlier ones, but later units made for $$$ and
> > people who did a lot of "remote" travel worked up to about 4800.
> > Essentially we are really just talking about a certain level of "fidelity"
> > between your hardware and the telco hardware.
> >
>
> You can still buy acoustic couplers, I bought one several years
> ago. It definitely does better than 4800. If I recall correctly
> mine does 9600 baud and possibly higher. There are two markets
> for acoustic couplers. One if traveling sales people. A
> acoustic coupler can be used from a pay phone, so they can
> connect on the road. The other is for people who do a lot
> of traveling outside of North America. Its easier to connect
> an acoustic coupler to a phone than to try and find the
> appropriate phone jacks. In some hotels, particularly in
> Europe, the phones aren't jacked, so unless you take the phone
> apart (I have a friend that carries a complete tool kit for
> this purpose), an acoustic coupler is your only choice. If
> I remember correctly I paid around $150 for mine.
>
> --
> Dr. Mark Green mark_at_cs.ualberta.ca
> Professor (780) 492-4584
> Director, Research Institute for Multimedia Systems (RIMS)
> Department of Computing Science (780) 492-1071 (FAX)
> University of Alberta, Edmonton, Alberta, T6G 2H1, Canada
>
Received on Thu Oct 14 1999 - 15:57:08 BST