The ringer is turned off. How do I turn the ringer on? also can I buy another owners mannual

To set the ringer volume of the base unit, press FUNCTION/EDIT, scroll to Ringer Setting using the up or down arrow keys of the navigator key(lower right of base unit), press the right arrow key to select Ringer Setting. Press the right arrow key again to select Ringer Volume. Use the up or down arrow keys to choose the volume level, press the right arrow key to save the setting.

To set the ringer volume of the handset, press the CONF/FUNCTION button(lower left) on the handset, scroll to Ringer Setting using the up or down arrow keys of the navigator key(center of the handset), press the right arrow key to select Ringer Setting. Press the right arrow key again to select Ringer Volume. Use the up or down arrow keys to choose the volume level, press the soft key SAVE to save the setting. (There are three softkeys directly under the LCD screen of the handset whose functionality can change according to what is on screen)

The manual can be downloaded from the link below free of charge.

http://service.us.panasonic.com/OPERMANPDF/KXTG2770S.PDF