Cisco 8832 User Manual page 38

Your Cisco IP Phone works just like a regular phone. But we make it easier for you to answer calls.
Press Answer.
When you're on an active call, you know that a call is waiting when you hear a single beep and see a message
on the conference phone screen.
Press Answer.
You can send a ringing call to your voicemail system.
Press Decline.
Use do not disturb (DND) to silence your phone and ignore incoming call notifications when you need to
avoid distractions.
When you turn on DND, your incoming calls are forwarded to another number, such as your voicemail, if it
is set up.
Press Do not disturb to turn on DND.
Press Turn off DND to turn off DND.