See also:

Volume control buttons
Models without Hands-free system Models with Hands-free system Press the “+” button to increase the volume. Press the “−” button to reduce the volume. A number indicating the volume ...

Top redial
1. Select the top menu (phone menu). 2. Press the OFF hook switch and load the outgoing call history. 3. Select the “DIAL” menu. ...

Replacing the air cleaner element
Replace the air cleaner element according to the maintenance schedule in the “Warranty and Maintenance Booklet”. Under extremely dusty conditions, replace it more frequently. It is recommended that yo ...