Appendix Tones and Ringer Signals
131
7.4 Tones and Ringer Signals
Audio Signals
Ring tone
Internal busy tone
Internal dialling tone
External dialling tone/
continuous tone
Positive acknowledgement tone
Negative acknowledgement tone
Special internal dialling tone
Special external dialling tone
Call waiting tone
Special sensor tone
Calls
External call
Internal call
VIP call
Callback
Sensor call
Time axis in seconds
0123456
The tones and ringer signals mentioned above are valid for Germany; in other countries they may differ.
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