The Cisco IP Phone 8811 does not support a key expansion module.
Note
Cisco IP Phones 8841 and 8845
The following section describe the attributes of the Cisco IP Phones 8841 and 8845.
Phone Connections
Connect your phone to the corporate IP telephony network, using the following diagram.
Access port (10/100/1000
PC) connection.
5DC adaptor port
(DC48V).
1
Auxiliary port.6AC-to-DC power supply
(optional).
2
Handset connection.7AC power wall plug
(optional).
3
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
4
Cisco IP Phone 8800 Series Multiplatform Phone Hardware
Cisco IP Phones 8841 and 8845