AT&T Callmaster Series Reference Manual page 58

GENERAL INFORMATION
Call Progress Tones
The following call progress tones are generated by the system:
TONE
Ringback Tone
Bridging Warning Tone*
Busy Tone
Call Waiting Tones
Internal
External or Handled
by Attendant
Priority Call
Coverage Tone
Confirmation Tone
Dial Tone
Intercept Tone
Reorder Tone
Call Waiting
Ringback Tone
* This tone is used with the Busy Verification and Executive Override features and Service
Observing when the warning tone is enabled.
2-18
FREQUENCY
440 Hz + 480 Hz 1000 on, 3000 off; repeated
440 Hz 500 on, 15000 off; repeated
480 Hz + 620 Hz 500 on, 500 off; repeated
750 Hz + 20 Hz 100 on; not repeated
750 Hz + 20 Hz 100 on, 100 off, 100 on;
not repeated
750 Hz + 20 Hz 100 on, 100 off, 100 on,
100 off, 100 on;
not repeated
440 Hz 600 on, followed by silence;
not repeated
350 Hz + 440 Hz 100 on, 100 off, 100 on,
100 off, 100 on
followed by silence;
not repeated
350 Hz + 440 Hz Continuous
480 Hz & 620 Hz 250 on (480 Hz),
250 on (620 Hz); repeated
480 Hz + 620 Hz 250 on, 250 off; repeated
440 Hz + 480 Hz; 1000 on (440 Hz + 480 Hz),
440 Hz 200 on (440 Hz), 2800 off;
repeated
PATTERN (In ms)