Check your cables

If you are using an internal or external modem (as opposed to a LAN connection), make sure the "wall" or "line" end of your modem cable is connected to a telephone service jack in the wall (often called a "wall jack").
If you are using an external modem, make sure the "phone" end of your modem cable is plugged into your telephone.
Make sure all cable connections are secure.
Verify that your phone cable is working by trying it with your telephone or replacing it with a cable that you know works.
In the dialing error screen, click Next.

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