User's Manual

Mute IP phone sound base
Procedure
Step 1
Press Mute to turn Mute on.
The Mute button is backlit by a solid, red light, and the sound base LEDs are red.
Step 2
Press Mute again to turn Mute off.
Mute IP phone DCU
Procedure
Step 1
Press Mute to turn Mute on.
The Mute button is backlit by a solid, red light, and a mute icon displays on the screen.
Step 2
Press Mute again to turn Mute off.
On-Hook dialing
On-hook dialing allows you to enter a phone number before getting a dial tone and then press the Call button
to complete the call.
Dial number on-hook
Procedure
Step 1
Enter or speed dial a phone number.
Step 2
Press Dial.
Plus Dialing
Plus Dialing allows you to press and hold the star (*) key for at least 1 second to insert a plus (+) sign as the
first digit in a phone number when dialing an international number.
Cisco Unified IP Phone 8831 User Guide for Cisco Unified Communications Manager 9.3
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Calling Features
Mute IP phone sound base