Cisco IP Phone 7821
Cisco IP Phone 7821
Phone Connections
For your phone to work, it must be connected to the corporate IP telephony network.
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Cisco IP Phone 7821, 7841, and 7861 Administration Guide for Cisco Unified Communications Manager 10.0
(SIP)
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DC adaptor port (DC48V) (optional).
AC-to-DC power supply (optional).
AC power wall plug (optional).
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Access port (10/100 PC) connection.
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Auxiliary port (optional).
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Handset connection.