Polycom SoundPoint IP550 Manual page 4

Do Not Disturb
— Transfer incoming calls to 'Overflow'
4. Microphone Mute —
5. Headset —
6. Speaker phone — The speaker phone button for hands-free use
7. Speaker —
8. Volume —
9. Dial Pad — The key board of the phone
10. Soft Keys — These keys are automatically labeled to identify their context-
sensitive applications
11. Hold —
Put a caller on hold or to resume a conversation
12. Speaker – For hands-free calling
13. Phone Hook – To end calls
14. Speed dial and Busy Lamp Field buttons — These buttons can be used as
speed dial keys and availability buttons (Busy Lamp Field)
Manual NDI Advanced Phone
Switch the microphone on or off
Switch a headset on or off
Switch handsfree dialing on or off
Volume control
Page 4