Polycom KIRK 6040 - Manual (Page 13)

Polycom Kirk 6020-6040 User Guide Handset Display
14 Polycom, Inc.
Display Backlight
The display backlight automatically turns on when an incoming call or message
arrives, or if a key is pressed.
The telephone icon will appear when the handset is off hook or a call
is connected.
The envelope icon will appear when you receive a message.
The charging icon will appear when the handset is placed in charger.
The fully charged icon will appear when the battery is fully charged.
The key lock icon indicates that the entire keypad is locked.
The silent icon will appear when all sounds are disabled.
The loadspeaker icon will appear when loadspeaker is turned on.
The mute icon will appear when mic mute is turned on. Mic mute is
a abbreviation of microphone mute.
The bluetooth icon will appear when bluetooth is activated. However,
when wireless headset is connected, the bluetooth icon disappears.
The headset icon will appear when the wireless headset is connected.
The telephone icon will appear when you make a call.