Cisco Ip Phone 8851 - Cisco 8851 Administration Manual

The Cisco IP Phone 8841 and 8845 does not support a key expansion module.
Note

Cisco IP Phone 8851

Phone Connections
Connect your phone to the corporate IP telephony network as shown in the following diagram.
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2
3
4
5
DC adaptor port (DC48V).
AC-to-DC power supply (optional).
AC power wall plug (optional).
Network port (10/100/1000 SW) connection.
IEEE 802.3at power enabled.
Access port (10/100/1000 PC) connection.
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
6 Auxiliary port.
7 Handset connection.
8 Analog headset connection (optional).
9 USB port
Cisco IP Phone 8851
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