The factory settings at a glance:
Context-sensitive, programmable function symbols and function keys F1–F4
Press the function key underneath the display
symbol to activate the function, open the list
etc. depicted by the symbol above the key.
Standard functions available on idle screen. Default settings and icons depend on firmware installed on phone.
Internal phone directory
Call lists (missed, received, dialled calls)
/ 
Forwarding all calls (turning CFWD on/off )
Status information (call forwarding active, passwords not set, missed calls, etc.) or, if no status info, to show phone's IP address and URL to Gigaset Wiki
Audio control keys
Adjusting the volume
- of the ringer when the phone is idle or ringing
- of the handset/casing loudspeaker when in a call
Mute/unmute microphone
Toggling between handsfree and handset mode. Press to dial number and accept calls on speakerphone.
Headset mode on/off
Navigation keys
Canceling actions & input, and returning to previous screen
Terminating calls on speakerphone and in headset & handset modes
Confirming, saving actions & input, and returning to previous screen
Accepting calls on speakerphone and in headset mode
From idle screen: Missed calls (Call History)
From idle screen: Select outgoing identity
From idle screen: Received calls
From idle screen : Missed calls
In other contexts (settings, lists): Navigate up/down
In other contexts: Navigate/space left
In other contexts: Navigate/space right
Dedicated, customizable function keys
MWI key with LED
LED is lit when message is waiting on mailbox (if mailbox supplied on PBX)
Press key to listen to message(s)
Redial
Transfer
Hold
SmartLabel keys with LED P1–P4
Default setting: Line
- Fast-blinking LED: Incoming call. Press key or
to accept - Steadily lit LED: In call
- Slow-blinking LED: Call on hold
Star key 
In editing mode:
- Press for one second to change input mode (numerals > lower case > upper case)
- Press briefly to type *
On idle screen: Press for 3 seconds to lock/unlock the keypad