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When an operator makes a mistake in operation or procedure, ARO
FLEX gives an automatic warning signal (3 rings) and blocks the key
board and tape reader till the mistake has been corrected. The auto
matic group count, paging procedure, crypto procedure and End of
Message function, combined with the possibility of correcting the
clear text message preparation, make for a simple, versatile equipment.
The monitoring of the input is a useful feature.
The page copy of all outgoing traffic, which contains a clear indication
of the moment when enciphering was started and terminated, permits
effective control over the traffic.
The keyboard is equipped with a special key for the Message Validation
Signal (Nabla sign, figs H). It also contains an automatic Figures/Letters
shift, which comes into action when it is needed; actuation of the
"Letters" or "Figures" buttons is not necessary.
The device is equipped with a keyboard memory of 10 characters.
The "Who Are You?" and "Here Is" keys are also accommodated on
the keyboard.
The page printer is equipped with an automatic New Line function
(CR + LF) which comes into action after the typing of the 69th char
acter or 72nd character on a line, depending upon an adjustment in
the telepinter.
This New Line function is not punched or stored in the message memory
and serves solely to avoid the typing of a complete line on a single spot
if a Carriage Return or Line Feed is omitted or garbled.
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