USB port
11
Auxiliary port.
6
DC adaptor port (DC48V).
1
Handset connection.
7
AC-to-DC power supply
(optional).
2
Analog headset connection
(optional).
8
AC power wall plug (optional).
3
USB port
9
Network port (10/100/1000 SW)
connection. IEEE 802.3at power
enabled.
4
Audio In/Out ports
10
Access port (10/100/1000 PC)
connection.
5
Cisco IP Phone 8811, 8841, 8851, 8851NR, and 8861 User Guide for Cisco Unified Communications Manager 10.5
17
Getting Started
Phone Connections