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IP8540 User Guide
5
• Light-emitting diode (LED) status lights : Indicates user presence information
(Green indicates “Available”, Amber indicates “Away”, Green & Amber indicates
“Inactive”, and Red indicates “Busy” or “Active Call”)
• Scroll-wheel : Navigates up and down the contact list and other elements of the
user interface.
• Volume up/down button : Increases and decreases the volume for the
ringer, handset, and loudspeaker.
• Mute microphone : Disable or enable audio input
• Speakerphone button : Activate or deactivate speakerphone
• Headset button : Activate or deactivate headset audio
• Finger reader : Allows you to log on to your IP8540 with the touch of your finger
• Help : Displays context sensitive help