User guide

Access port (10/100 PC) connection.5DC adaptor port (DC48V).1
Auxiliary port.6AC-to-DC power supply (optional).2
Handset connection.7AC power wall plug (optional).3
Analog headset connection (optional).8Network port (10/100 SW) connection. IEEE
802.3af power enabled.
4
Cisco IP Phone 7821, 7841, and 7861 User Guide for Cisco Unified Communications Manager 10.0 (SIP)
12
Getting Started
Phone Connections