Why does my PC switch itself on if the telephone rings when my Pace modem is plugged in to the telephone line?
FAQ126
There is a setting in the PC's BIOS called 'Wake up on Ring' (or something similar, depending on the BIOS type). You would have to alter the configuration in the BIOS to disable the 'Wake up on Ring' option in the Power Management section.
Refer to the computer manufacturers documentation on how to access the BIOS configuration.