Yealink SIP T42G Manual page 21

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Power over Ethernet
Using a regular Ethernet cable, the SIP-T42G IP phone can be powered from a PoE (IEEE
802.3af) compliant switch or hub.
To connect the PoE:
1. Connect the Ethernet cable between the Internet port on the phone and an
available port on the in-line power switch/hub.
Note
If in-line power is provided, you don't need to connect the AC adapter. Make sure the
Ethernet cable and switch/hub is PoE compliant.
The phone can also share the network with other network devices such as a PC
(personal computer). It is an optional connection.
Important! Do not unplug or remove power to the phone while it is updating firmware
and configurations.
Phone Initialization
After your phone has been powered on, the system boots up and performs the
following steps:
Automatic Phone Initialization
The phone finishes the initialization process by loading the saved configuration. The
phone LCD screen will display "Initializing...Please wait" during the initialization.
Getting Started
13