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
8
(2e) Preprogrammed Function Keys
The preprogrammed function keys are preprogrammed as labeled. The following functions are
mapped onto them:
ip820c - ip830c - ip840c
Redial
Redials a number see page
58
Directory
Calls up the phone directory see page
77
Transfer
Transfers calls
(if supported by your PBX)
see page
72
Menu
Not preprogrammed
Conference
Establishes a three-party conference call see page
73
Hold
Places a call on “Hold” or resumes it see page
71
Settings
Calls up the “Settings” menu for configuration changes see page
24
Record
Switches call recording on and off
(if supported by your PBX)
see page
74
Help
Calls up information about the phones: IP address, MAC
Address, and Firmware Version
see page
25
Not preprogrammed
DND
Switches “DND” mode on and off see page
64
Retrieve
Retrieves messages from the voice mailbox
(if supported by your PBX)
see page
83
(2f) Context-Sensitive Function Keys
The ip820c, ip830c, and ip840c have context-sensitive function keys (S1 to S4) below the
display. The current function of these keys is indicated by the text or symbol in the display
above each key.
The key context for the idle screen can be customized (see page
17).
For the complete mapping see page
87 “Mapping of Context-Sensitive Function Keys”.