|Well, do you have a moden in it? The external connection for the modem will have a modular phone jack like your home phone has. It may have 2 jacks--one to connect to the wall and the other to optionally plug in a phone.|
If you don't have a modem then that's why one's not detected. If you do have a model it may be bad or need to have drivers installed.
What prompted you to do a modem search? Are you trying to set up an internet connection?