It has been reported that a failed modem did report that message. Did you install a new modem?
About a week we had a lot of lightning in our area (Atlanta) and it zapped our phone lines. The phone company came out because both phones were "dead" and fixed(?) the problem. They worked on the phone line outside as well as inside the house. Now, both phones (the same ones) work upstairs and downstairs. I have 2 computers with Windows XP and I plug each one into the phone jack upstairs and downstairs.
The downstairs computer (about 4 yrs. old) has no problems. The upstairs computer (Dell-1 year old) will not connect and I get this message: "you have plugged a digital phone line into your modem". (V90/K56) we were unable to connect your TCP/IP. Connection may not be properly working.
I tried plugging the upstairs computer into the downstairs jack and got the same message but when I plug the older computer in the same jack, there is no problem. I guess that means there is something wrong with the modem on the Dell-1 year old computer but I don't have a clue as to what I should do. Can anyone please, please help me???