[GreenKeys] Upper Case functions and characters

[Don Robert House]

On private line services the customer could have just about what they 
wanted for upper case functions.

The Bell System Teletypewriter Exchange (TWX) service always had BELL 
as upper case S.   It is the so called American version of ITA2.  The 
CCITT international version of ITA2 has the BELL on upper case J.

If your machine was set up for sending messages overseas it probably 
has the BELL over the J.  If it was intended for use in the USA it 
would have the BELL over the S.

We Americans used three different keyboard and typebox layouts 
depending on the service the machines were put into.

Communications / Punctuation

Commercial / Fractions

Weather / Symbols

The Commercial / Fractions layout was used for early TWX.

You can read up on this on our website under 5 level codes.

http://www.nadcomm.org


Don