AT&T Callmaster Series Reference Manual page 60

GENERAL INFORMATION
Indicator Lights Signals
The following light signals are generated by the system for the attendant console and multi-
appearance voice terminals.
2-20
LAMP SIGNAL
Dark (Off) Off
Lighted (On) On
Flashing 500 on, 500 off; repeated
Fluttering 50 on, 50 off; repeated
Broken Flutter 5 cycles of 50 on, 50 off,
followed by 500 off; repeated
Wink 350 on, 50 off; repeated
PATTERN (In ms)