See also:

When “CHECK DEVICE” is displayed
This message is displayed under the following conditions. - When there is a short in the USB bus - When a non-corresponding device (for example a USB mouse) is connected - When a non-correspo ...

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. ...

Warning and indicator lights
...