AASTRA 600c_d for OpenCom 1000 User Guide EN - Manual (Page 96)

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Ringer volume
Set your preferred ringer volume (increasing, 1...7).
Ringer device
Configure where or how the ringer should be signalled (loudspeaker, headset,
vibration alarm).
Play once Select whether the ringer should ring once or repeatedly.
Key click Switch the key click on or off.
Confirm tones
Switch the confirmation tones on or off.
Noise detection
Switch the automatic noise detection for a louder ringer on or off.
Loud environment
Adapt the speech quality in a loud environment.
Silent charging
Switch the "Silent charging" on or off.
LED incoming call
Switch the LED display for an incoming call on or off.
Devices menu