More Teletype trivia [telecom]

AP always required: Carriage Return Line Feed Letters at the end of each line; this insured that even when the receiving machine falsely jumped into Figures during the carriage return glich, it would be reset into Letters for the new line.

UPI was not that rigorous, and you'd get lines like 5#3178(?492, instead of letters. This occurred often enough that senior UPI editors would sightread it as letters without a pause.

***** Moderator's Note *****

I always thought that the extra "rubout" after the CR/LF was to give older machine a little extra time to swing the type basket all the way to the left. This would compensate for old springs, a dashpot with too little space on the air outlet, or just general gunk, dried grease, etc.

Bill Horne Moderator

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Posted 5 years ago by David in General Telecommunications Forum

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