Packet is not used much on HF anymore, because it is limited to 300 baud.
It is used more on VHF/UHF, and there are some tie-ins to the internet.  But
I'm not sure it's used so much in that mode, either.

On HF, PSK31 is used a lot, but its baud rate is very limited.  RTTY is used
a great deal on HF, at 45.45 baud, Baudot code, 170 Hz shift, especially for
contests where PSK31 is thought to be too slow for rapid-fire QSO's.  And
there is a lot of CW on the bands, still.
73,
Lloyd Rasmussen, W3IUU, Wheaton, Maryland
Home:  http://lras.home.sprynet.com
Work:  http://www.loc.gov/nls
 

> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of John J. Boyer
> Sent: Wednesday, April 11, 2012 2:20 AM
> To: [log in to unmask]
> Subject: Re: Braille QSO's
> 
> Thanks. I'm looking for something interesting, not simple. This is good
> information.
> 
> How much is packet radio actually used?
> 
> How about RTTY? I am thinking of the ttys deaf poeople use to
> communicate over the phone, but with a radio link instead.
> 
> John
> 
> On Tue, Apr 10, 2012 at 10:56:39PM -0400, Lloyd Rasmussen wrote:
> > I had schedules with Rick Joy for several months during the 1980s,
> Sunday
> > nights on 20 meter CW, coast-to-coast.
> >
> > I think that CW vibrating a speaker cone, with the pitch set quite low,
> the
> > RF gain turned down, and high selectivity, would be far simpler than
> digital
> > modes driving a braille display.  The various over-the-air modes are
> full
> > protocols with headers, acknowledgment routines and/or error correction.
> > Some of the software which does this runs in Linux, so it may be
> accessible
> > to BrlTTY or whatever you are using.  The other thing about digital
> modes is
> > that you will have to tune the signal in to one extent or another.  With
> > some combinations of software and a single-sideband receiver, sever
> > different stations may appear within the passband you are receiving, and
> you
> > click on one of the indicated frequency offsets to begin copying the
> > selected signal.  I'm sure there are ways to do this stuff, but they
> won't
> > be simple to implement.
> > 73,
> > Lloyd Rasmussen, W3IUU, Wheaton, Maryland
> > Home:  http://lras.home.sprynet.com
> > Work:  http://www.loc.gov/nls
> >
> >
> > > -----Original Message-----
> > > From: For blind ham radio operators [mailto:BLIND-
> [log in to unmask]]
> > > On Behalf Of John J. Boyer
> > > Sent: Tuesday, April 10, 2012 9:30 AM
> > > To: [log in to unmask]
> > > Subject: Re: Braille QSO's
> > >
> > > I think i"m referring to packet radio. Where could i find more
> > > information about it.
> > >
> > > Thanks,
> > > John
> > >
> > > On Tue, Apr 10, 2012 at 01:24:37PM +0100, David W Wood (G3YXX) wrote:
> > > > You could be referring to packet radio, RTTY, PSK31 or other data
> modes
> > > =
> > > > - even CW!
> > > >
> > > > 73
> > > >
> > > >
> > > > David W Wood
> > > >
> > > > Ham call - G3YXX
> > > > FOC # - 1685
> > > > Licensed - 1969
> > > > =20
> > > >
> > > > -----Original Message-----
> > > > From: For blind ham radio operators =
> > > > [mailto:[log in to unmask]] On Behalf Of John J. Boyer
> > > > Sent: Tuesday, April 10, 2012 1:15 PM
> > > > To: [log in to unmask]
> > > > Subject: Braille QSO's
> > > >
> > > > I don't know if my subject says what I have in mind. What I am
> > > thinking=20
> > > > of is connecting a braille display to a transmitter and receiver
> through
> > > =
> > > >
> > > > a modem such as is used for Internet connections over a phone line.
> I=20
> > > > think people are already using something like this with a computer.
> What
> > > =
> > > >
> > > > is it called? What are the advantages and disadvantages?
> > > >
> > > > Thanks,
> > > > John
> > > >
> > > > --=20
> > > > John J. Boyer; President, Chief Software Developer
> > > > Abilitiessoft, Inc.
> > > > http://www.abilitiessoft.com
> > > > Madison, Wisconsin USA
> > > > Developing software for people with disabilities
> > > >
> > > > --
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> > > --
> > > John J. Boyer; President, Chief Software Developer
> > > Abilitiessoft, Inc.
> > > http://www.abilitiessoft.com
> > > Madison, Wisconsin USA
> > > Developing software for people with disabilities
> 
> --
> John J. Boyer; President, Chief Software Developer
> Abilitiessoft, Inc.
> http://www.abilitiessoft.com
> Madison, Wisconsin USA
> Developing software for people with disabilities