4G Systems XSJack T3e - Manual (Page 25)

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Command response tones
Success / Positive response tone / Acknowledgment: 2 x (440Hz
[125ms], 660Hz [125ms], 880Hz [125ms], Pause [125ms]);
Enabled: 1 x (440Hz [125ms], 660Hz [125ms], 880Hz [125ms]):
Failed / Negative response tone / Non-Acknowledgment: 3 x (3 x
(800*880Hz [125ms], Pause [125ms]), Pause [0.5s]);
Disabled: 1 x (3 x (800*880Hz [125ms], Pause [125ms])):
Tones during connection
Busy tone: 425Hz [0.48s], pause [0.48s], repeating (*):
Congestion tone: 425Hz [250ms], pause [250ms], repeating (*):
Held call hung up: 3 x (440Hz [125ms], pause [25ms]):
Legend:
(*)
Tone may be country specific
X*Y Hz X Hz modulated by Y Hz
X+Y Hz X Hz mixed with Y Hz
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