Why unused CCITT #2 codes [telecom]

Bill asked:

There are 32 combinations of bits available from a 5-unit code such as

The book *Principles of Telegraphy (Teletypewriter) *at

states that three codes in CCITT Alphabet #2 are unassigned. Figures case (shifted) F, G, and H are described as "Unassigned internationally, may be used with local meanings in national systems." Figure C-2 shows them as !, & and STOP in the "U.S. Military Communication Alphabet."

Chuck

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Posted 5 years ago by Charles Jackson in General Telecommunications Forum

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