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Chapter 3 Installing the Cisco IP Phone
Connecting the Cisco IP Phone to the Network
3-4
Cisco IP Phone Administration Guide for Cisco CallManager 3.3, Cisco IP Phones 7902G/7905G/7912G
OL-6313-01
The following warnings apply when you use an external power supply.
Warning
This product relies on the building's installation for short-circuit (overcurrent)
protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15 A U.S.
(240 VAC, 10 A international) is used on the phase conductors (all
current-carrying conductors).
Warning
The device is designed to work with TN power systems.
Warning
The plug-socket combination must be accessible at all times because it serves
as the main disconnecting device.
Connecting the Cisco IP Phone to the Network
You must connect the Cisco IP Phone to the network and to a power source before
using it. See Figure 3-1 and Figure 3-2 for graphical overviews of the procedures
that follow.
To install a Cisco IP Phone, perform these steps.
Procedure
Step 1 Connect a Category 3 or 5 straight-through Ethernet cable from the switch to the
network port on the phone.
See the “Connecting to the Network” section on page 2-8 for guidelines. Each
Cisco IP Phone ships with one Ethernet cable in the box.
Step 2 Connect the handset to its port.