Hello Stacey,
Thank you for your question. Based on your description, this appears to be a question about connecting a landline telephone to a Wi‑Fi or telephone service rather than a Microsoft Windows product.
Microsoft Q&A is focused on Microsoft products and services, so I are unable to provide guidance for telephone hardware or service-provider equipment. I recommend contacting your telephone service provider or the manufacturer of the phone/router equipment for assistance with the correct setup.
Thank you for your understanding.