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Cisco IP Phone Administration Guide for Cisco CallManager 3.3, Cisco IP Phones 7902G/7905G/7912G
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Chapter 3 Installing the Cisco IP Phone
Connecting the Cisco IP Phone to the Network
Step 3 Connect a Category 3 or 5 straight-through Ethernet cable from another network
device, such as a desktop computer, to the access port on the Cisco IP Phone
7912G (optional).
See the “Connecting to the Network” section on page 2-8 for guidelines.
Note This option is not available on the Cisco IP Phone models 7902G/7905G.
Step 4 Connect the power supply to the Cisco DC Adapter port (optional).
See the “Providing Power to the Cisco IP Phone” section on page 2-9.