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Tag: ups

APC CS-500 causes USB disruption

I'm having a EM interference problem with the APC CS-500 UPS on two different locations. Those two locations are near each other and there seems to be something wrong the power grid in that area. Both UPS's momentarily switch over to battery several times a day. Some of these times, the apcupsd daemon sends a message saying that the communication with the UPS has been restored (and therefore it had been lost at some point). Read More »