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Is telephone exchange equipment, most primarily DSLAMs, susceptible to brownouts?. I would imagine BT employ UPS systems, right? I keep experiencing mains voltage dips and I happen to be on the same transformer as my telephone exchange, each time this happens it knocks out my line.
My servers survive because I've got a rack of UPS boxes, but I'm trying to figure out what's killing my connection.
It's either my UPS spiking out a dirty phase when they click on, somehow fucking with my router. Or, It's exchange end.
I have no idea how to exclude either of those possibilities.