User Manual For IphonePanasonic Kx-t7731 ManualPanasonic Kx-t7731-b User Manual PdfPanasonic Kx-t7731-b User Manual FreePanasonic Kx-t7731-b User Manual 2017Telephone System: Panasonic KX-T7730 How to set Date & Time: First check which one is Main extension. By pressing one or two time '.' key, come to know the extension number of phone. There are two way to set Time & Date. Short way: from swit..