See also:

Screw thread
Push out the cover by pressing on the top edge. ...

DTMF suffix dialing
DTMF suffix dialing can be used for gaining access to network services or for controlling devices, e.g., to make a remote inquiry of an answering machine. The DTMF code is needed for this purp ...

Entertainment
Operation of the radio, CD equipment and external audio devices as well as their tone settings are described in this chapter. ...