On some models if you cannot change the receive mode this may be caused by the distinctive ring feature being turned on. As long as you do not use a "Ring-Mate", "Ring-Master" or "Identa-Ring", you should be able to follow the below instructions. In general, you can check this feature by pressing the Menu button then #31, and in the display it should show "Distinct Ring". Make sure the mode is set to OFF (this can be done by using the Navigator button). Next press the Start/Set button again followed by the Menu button to complete the setting.