This article will provide some general router (or modem router) setup advice.
What you'll need
Ethernet ports are most commonly labelled "LAN" or a symbol showing objects linking together.
The default WiFi network name (may be labelled "SSID") and default WiFi password (may be labelled "WPA", "WPA-PSK", etc.)
They will also be printed on the barcode sticker on the back or underside of the modem (example below).
If your home doesn't have internal Ethernet wiring, your setup may look something like the example below.
Using the Digital Voice