Auxiliary port (optional)4DC adapter port1
Handset connection5Power adapter2
Analog headset connection (optional)6Network port (10/100 SW) connection3
Cisco IP Phone 6821 Multiplatform Phones Buttons and
Hardware
The following figure shows the Cisco IP Phone 6821 Multiplatform Phones.
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
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About the Cisco IP Phone
Cisco IP Phone 6821 Multiplatform Phones Buttons and Hardware