Sony Vaio PCG-GRT260G User Manual page 217

Internet
Why doesn't my modem work?

Make sure the telephone cable is securely plugged into the Modem jack on the computer and the wall jack.

Make sure the telephone cable is working. Plug the cable into an ordinary telephone and listen for a dial tone.
 Make sure the telephone number the program is dialing is correct.
 Make sure the software you are using is compatible with the computer's modem. (All preinstalled Sony programs are
compatible.)
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