Cisco 7811 User Manual page 10

Phone Connections
1
2
3
Cisco IP Phone 7811, 7821, 7841, and 7861 User Guide for Cisco Unified Communications Manager 10.0 (SIP)
2
DC adaptor port (DC48V).
AC-to-DC power supply (optional).
AC power wall plug (optional).
4 Network port (10/100 SW) connection.
IEEE 802.3af power enabled.
5 Access port (10/100 PC) connection
(optional).
6 Handset connection.
Getting Started