AT&T 6300 Programmer's Manual page 177

Syntax
Remarks
Example
BEEP
Statement
Activates the bell.
BEEP
In the following example, the program is
checked to see if "X" is out of the accepted
range. MIN and MAX are variables containing
the limits of the accepled range.
PRINT CHR$(7); sends an ASCII BEL
character, which also activates the bell.
2430 IF (X<MIN)
or
(X>MAX) THEN BEEP
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