LG CU405 User Manual page 18

Your Phone
Speakerphone
You can use the speakerphone during a call by
pressing the
located on the top of the phone. The
loudspeaker is automatically deactivated
when you end the call.
Backlight
A backlight illuminates the display and the keypad.
When you press any key or open the folder, the
backlight turns on. It turns off if no key is pressed
within a given period of time, depending on the
Backlight Timer menu option. After 30 seconds, the
display turns off to conserve your battery power. To
specify the length of time the backlight is active, set
the Backlight Timer menu option (Menu 9.2.3).
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or [speakerphone] key
Headset jack
Side key
PTT key - Use for quick access to the PTT function.
• Pressing and releasing this key while idle
displays your PTT contacts.
• Pressing and holding this key while idle displays
your PTT history.
• Pressing and holding this key while in a PTT call
allows you to speak to the other call participants.
External Display
Your phone has an external display on the cover. It
indicates when you have an incoming call or a
message. It also alerts you at the specified time when
you set an alarm by turning on its backlight and
showing corresponding icon on it.