Sony CMD-J5 Operating Instructions Manual page 7

• In standby mode, slide the switch down to lock/unlock your keypad
(including Jog Dial). It is still possible to make emergency calls
(112) as well as answer/reject an incoming call (by pressing
) when the keypad is locked. After the call ends, the keypad
will lock again automatically.
• During a call, turn the loudspeaker on by sliding the switch up
once. Turn the loudspeaker off by sliding the switch up again.
• During an incoming call, stop the ringer by sliding the side switch
up.
• During a game, stop/start the background sound by sliding the side
switch up.
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