Yealink SIP-T42G User Manual page 6

AC Power (Optional)
To connect the AC power:
1. Connect the DC plug on the power adapter to the DC5V port on the phone and connect the other
end of the power adapter into an electrical power outlet.
2. Connect the included or a standard Ethernet cable between the Internet port on the phone and the
one on the router or switch/hub device port.
Power over Ethernet
With the included or a regular Ethernet cable, the SIP-T42G IP Phone can be powered from a PoE-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
Page 6 of 18 Cloud Voice Yealink SIP-T42G Phone User Guide