Cisco Ip Phone 7821, 7841, And 7861 User Guide For Cisco Unified Communications Manager 10.0 (Sip - Cisco 7821 User Manual

Getting Started
1 DC adaptor port (DC48V) (optional).
2 AC-to-DC power supply (optional).
3 AC power wall plug (optional).
4 Network port (10/100/1000 SW) connection.
IEEE 802.3af power enabled.

Cisco IP Phone 7821, 7841, and 7861 User Guide for Cisco Unified Communications Manager 10.0 (SIP)

5 Access port (10/100/1000 PC) connection.
6 Auxiliary port (optional).
7 Handset connection.
8 Analog headset connection (optional).
Phone Connections
7