Operation Manual
Table Of Contents
- Copyright
- Warranty
- Declaration of conformity
- Safety instructions
- Disposal of the product
- Hardware Components
- User Interfaces
- User and Administrator Mode
- Documentation
- Phone Installation
- Phone Initialization
- Registration
- Idle Screen
- Phone User Interface
- Web User Interface
- General Configuration Tasks
- Display Configuration Tasks
- Audio Configuration Tasks
- SIP Identity Configuration Tasks
- Function Key Configuration Tasks
- Maintenance Tasks
- Outgoing Calls
- Extension (SIP identity) for Outgoing Calls
- Making Calls
- Auto Completion (Number Guessing)
- Call Completion
- Call Termination
- Redial
- Call Indication
- Accepting Incoming Calls
- Call Waiting
- Denying Incoming Calls
- Denying Incoming Calls Automatically
- DND (Do Not Disturb) Mode
- Call Forwarding
- Audio Operation Modes
- Mute / Unmute
- Multiple Speaker Mode
- Hold and Resume
- Call Transfer
- Conference
- Call Recording
- Logoff All Users (Extensions/SIP Identities)
- Logon New User (Extension/SIP Identity)
- Access
- Access
- Availability
- Access
- Changing the Presence State
- Contact Presence
- Acoustical Indication
- Visual Indication
- Retrieve New Messages
- Busy Lamp Field (BLF) feature
- “Calls” List
- Call Pickup

User Manual - English
31
Backlight Mode
You can adjust the display’s backlight mode. By default the backlight mode is “On”:
• On: Backlight is turned off or dimmed when the phone is inactive for approximately 20
seconds
o ip830c: Backlight is turned off completely.
o ip840c: Backlight is dimmed.
• Off: Backlight is turned off completely
• Always: Backlight is on permanently.
Action: Change the backlight mode.
ip810c ip820c ip830c ip840c
Enter the settings menu (see page 24) and navigate
through the menu (see page
21) until the following
screen appears:
2 Backlight
2 Backlight
Press
——— Backlight ———
On
Backlight
On
Change the backlight mode by pressing or
Not applicable Not applicable
Press
to save the backlight mode or press
to
abort.
Result: The backlight mode has been changed.