Once you have received your package in the mail, open it up!
The three things from the box that you need are the SPA-122 device, the power supply and the ethernet cable included.
Connect the SPA-122 to your wireless router in one of the numbered ports in the back, one end of the network cable in the blue "INTERNET" port of the SPA-122 and the other end in the numbered port in the wireless router.
Plug in the power supply of the SPA-122 the power light will start flashing for a few minutes, and then you should have a total of three green LEDs lit up, including the handset icon LED on the right hand side of the box.
Plug in your phone line RJ-11 cable into the “PHONE 1” jack of the SPA-122, and you can now make and receive phone calls with your babyTEL Home Phone service.