Installation - D-Link DPH-125MS Quick Install Manual

Installation

Connect one end of the Ethernet cable to the LAN port on the IP
Phone and connect the other end of the Ethernet cable to your Local
Area Network using your hub, or switch.
Plug the power adapter into an AC outlet or power strip and plug the
other end into the AC input on the phone. The Power LEDs will light
up to indicate proper connection.
When you have connected the IP Phone to your network it should
look like the diagram below.
5 D-Link DPH-15MS Quick Install Guide