Cisco 6921

Access port (10/100 PC) connection.5DC adaptor port (DC48V).1
Handset connection.6AC-to-DC power supply (optional).2
Analog headset connection (optional).7AC power wall plug (optional).3
Network port (10/100 SW) connection. IEEE
802.3af power enabled.
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Cisco Unified IP Phone 6921, 6941, 6945, and 6961 User Guide for Cisco Unified Communications Manager 9.0 (SCCP
and SIP)
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Features of Your Cisco Unified IP Phone
Phone Connections