Aastra 600d, Руководство пользователя

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Noise detection
When this function is active, the volume of the ringer is automatically raised if
there is loud background noise.
Attention tones
Select whether the respective attention tones should be activated or not.
Key click Audible confirmation when a key is pressed.
Confirm tones Confirm successful/unsuccessful settings.
End of menu Alert tone on reaching the end of a menu list.
Battery warning Alert tone if the battery is almost empty.
Only a few minutes are left before the call will be disconnected.
Coverage warning Alert tones if the wireless connection threatens to disconnect.
Loud environment
If the handset is mainly used in a loud environment, the handset attempts to improve the
voice transmission.
Devices menu