Basic Knowledge > Device Overview > Functions of Keys and LEDs
Functions of Keys and LEDs
The following figure shows the keys and LEDs of the basic unit.
A
Microphone key with LED
Switches the microphone off (mute) and on again.
B
Keypad
Enables number dialling as well as entering digits and letters.
C
Telephone book key
Opens the telephone book.
D
Function keys with LED
They are programmable.
The LED indicates the status depending on the key definition.
E
Message key with LED
Opens the caller list, the answering machine list and the list of voice memos.
The LED signals existing (new) entries.
F
Redial key
Opens the redial list.
Scrolls through the redial list.
When the receiver is off the hook, dials the previously dialled phone number.
G
Query key
Initiates a query call.
H
Back key
Switches back in the previous menu or the previous level.
I
Directional pad
Enables key-based navigation on the display.
The arrow keys are used to select the desired elements.
The OK key is then used to activate the desired element.
J
Menu key
Opens the main menu.
K
Home key
Closes the opened menu. Incorrectly exited settings are not saved.
L
Hook key
Initiates/Ends headset calls or calls in hands-free calling mode.
M
Minus key
Decreases the volume of the ringer, the receiver or loudspeaker depending on the operating mode.
N
Plus key
Increases the volume of the ringer, the receiver or loudspeaker depending on the operating mode.
O
Loudspeaker key with LED
Switches loudspeaker listening on during a call.
Holding the key (2 seconds) switches hands-free calling on.
COMfortel 1600 - Firmware V2.2 - COMfortel Set V3.16 - Advanced Information V10 02/2019