A computer awakening or switching may be performed if there is an activity in a network card or a modem. To make these functions operable, your devices either should be non-volatile or should not be switched off while switching to the power saving mode. You can solve this problem the standby mode, operating mode on lower frequencies or suspend mode. If you use Windows 98 or later version, you should clear the check box “Allow the computer to turn off this device to save power”.
This check box appears on the “Power Management” tab of an appropriate device. Its setting (default value) allows an operating system turning off the selected device when switching to the power saving mode. To block the ability of device disconnection, you should clear the check box “Allow the computer to turn off this device to save power”.
To use the ability of computer awakening in case of a signal in a device, click the check box “Allow the device to restore the computer from standby mode reset by default”. For example, an incoming call sent to a modem will inform an operating system about the necessity to process this call even if a computer is in the sleep mode.
Many modern devices have the ability to awaken a system if some signal appears. But if the outdated devices are used, these check boxes may be unavailable indicating that such ability is not supported by the equipment.