[GreenKeys] ITA2 vs. USTTY for rtty

[gil smith]

Russ:

Hmm, I didn't realize that ITA2 was in use for US rtty.  Seems like a bad 
plan, when the bulk of the machines here used USTTY code sets, but then I 
suppose that most rtty today uses PCs.   Sounds like the folks writing the 
pc software standardized on ITA2, precluding proper use of mechanical 
machines.  Is this the same for all of the rtty software out there?

The following are the only figs chars that differ between USTTY and 
ITA2.  Other than the figs-S and figs-J swap you have noticed, have you 
seen figs-D/F/G/H/V/Z, from W1AW or other rtty sources that appear to be 
using ITA2?

If they are really using ITA2, they should be avoiding figs-D/F/G/H.  But 
in addition to the figs-S/J swap, there are also different chars defined 
for figs-V/Z, which makes an ITA2-to-USTTY conversion not fully 
possible.  Though it would be easy for me to add an option to TTY-Connect 
to swap the figs-S/J chars, and at least fix that.

     ITA2/Telex    USTTY
--------------------------------------------------------
D    wru (1)      $
F   (1)         !
G   (1)         &
H   (1)         #/stop
J   bell         '
S   '           bell
V   =          ;
Z   +          "

Note 1:  ITA2 defined four "national -use" chars, which were
          not to be used for international communications.
          Figs-D was generally WRU.
          Figs-F/G/H seem to have no "typical" chars, in keeping with
          their original country-specific definition.


gil


At 11:37 AM 2/23/2005, you wrote:
>Yes but...
>
>Hams all used to follow USTTY...at least in the 1960;s and early  1970's....
>
>I was just wondering if there was some decision to go to Bell J that got
>picked up by the software based RTTY guys or what...
>
>73,
>
>Russ
>
>In a message dated 2/23/2005 1:34:41 P.M. Eastern Standard Time,
>gil at baudot.net writes:
>
> >Bell  on the S char is the USTTY version of baudot
> >Bell on the J char is the  ITA2 version of baudot



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