AT&T 6300 Programmer's Manual page 649

Advanced Features
Event trapping is controlled by the following
statements:
Syntax 1 (to turn on trapping)
{COM(n)
I
KEY (n)
I
TIMER (n)
I
PLAY (n)}
ON
Syntax 2 (to turn off trapping)
{COM (n) I KEY (n) I TIMER (n) I PLAY (n)}
OFF
Syntax 3 (to temporarily turn off trapping)
{COM (n) I TIMER (n) I PLAY (n)} STOP
B-23