No dial tone on corded phone after installing xfi gateway

We have also done a gateway restart.  We get dead air - no dial tone or any sound at all.

Hi there!, @hmbay Thank you so much for reaching your Digital Care team. I appreciate your patience while you waited to connect with me. I'm very sorry for the trouble you are . Please be assured you reached the right person to assist you. Can you please DM me your first and last name, along with your full service address so that I can assist you further.-Richard

To send a direct message [private message]:

•   Click "Sign In" if necessary
•   Click the "Direct Message" icon
•   Click the "New message" (pencil and paper) icon
•   The "To:" line prompts you to "Type the name of a person". Instead, type "Xfinity Support" there.
•   - As you are typing a drop-down list appears. Select "Xfinity Support" from that list.
•   - An "Xfinity Support" graphic replaces the "To:" line.
•   Type your message in the text area near the bottom of the window
•   Press Enter to send it