Changing the M166 Settings© NEC Nederland B.V. 2015 Page 33 M166 CE Manaul4 Changing M166 Settings4.1 GeneralThere are two ways to make changes in the M166 configuration: Making changes via the air interface (preferred!) Using the subscription procedure as described in chapter 3 How to Subscribe theM166. (Use the USB – upload cable as mentioned in the procedures in chapter 3 Howto Subscribe the M1664.2 Changing Settings via the Air InterfaceFor this procedure, you do not need to have the cable.PROCEDURE: How to change the settings in an M166Actions1. Open the DECT Handset Configurator.2. In the menu bar, click “Tools” “Options”3. The following screen is displayed.