On Sun, Jul 08, 2007 at 04:23:16PM +0000, steef wrote: > please explain to me: how can that happen: frying a motherboard with a > defect modem? getting a little bit worried. >
Other than the reply you got re timing of power restore, consider that power failures and restores aren't done with nice no-bounce switches. The power goes off when either something pulls a wire apart or a fuse blows. Neither event produces a clean break and you can get voltage surges while it is happening. Restoration usually happens when a lineman engages a fuse, again not an instantaneous event. Keep in mind also that whatever caused the power failure could also put a surge on your modem line. If its a cable modem, the cable sheath needs to be bonded to ground where it enters the building. I would recommend that you read the IEEE guide for surge protection of equipment connected to AC power and communication circuits. Your network is a communication circuit and your boxes are connected to AC power. Having the computer on a UPS but bringing wires into the box from a different ground reference can allow surges to bypas the UPS's protection. If your UPS doesn't have connections to protect network cables, and your incoming modem cable, you probably need to plug in a full-featured surge supressing power bar that protects everything comeing in (power, phone, network, etc) to the UPS then everything else into that. In this case, your UPS would provide your common reference ground. Good luck, Doug. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
