New to Landline Phone Service

I have an older, basic type of home phone that I plugged into the Panoramic WiFi modem. Picked it up and no dial tone. Anyone know any tips? Does it need to be a certain kind of phone? The one I have is not digital, so CallerID and other features are irrelevant for the time being. (Times are hard). I have contacted a Samsung representative who suggested I go to my local Cox store but am wondering if I can save a trip! I have Cox Complete Care, should I reach out to them instead?