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Tones
The following call progress tones are generated by the system:
TONE
FREQUENCY
PATTERN (In Milliseconds)
Busy Tone
480 Hz + 620 Hz 500 on, 500 off; repeated
Confirmation Tone
350 HZ + 440 HZ
100 on, 100 off, l00 on, l00 off,
l00 on followed by silence
Dial Tone
350 HZ + 440 HZ Continuous
Reorder Tone
480 Hz + 620 Hz 250 on, 250 off; repeated
Ringback Tone
440 Hz + 480 Hz
1200 on, 4000 off; repeated
Call Waiting
440 Hz 200 on; not repeated
Recall Dial Tone
350 Hz + 440 Hz
100 on, 100 off, 100 on, 100 off,
100 on, 100 off, followed by
continuous tone
Preferred Route
440 Hz
Five 50 ms tones, 50 ms apart,
(Queuing) Tone (ARS)
not repeated
Indicator Lamp Signals
The following lamp signals are provided at multiline voice terminal line appearances:
LAMP SIGNAL
Dark
Lighted
Flashing
Broken
Fluttering
Wink
PATTERN (In Milliseconds)
Off
On
500 on, 500 off; repeated
50 on, 50 off; repeated,
(gated on/off every 500 ms)
350 on, 50 off; repeated
MEANING
Inactive
Ringing
Transfer/Conference
in progress
Hold
5-9