Stummschaltung des Klingeltons bei einem eingehenden Anruf

If the firmware of the speakerphone has been updated to version 1.2.14 or later, it is now possible to mute the ring tone of an incoming call.

To use this feature, simply press and hold the "Vol -" button whilst receiving an incoming call.

To unmute, press and hold the "Vol +" button whilst receiving an incoming call.