so the building is hardwired and you pipe that into the router. might be some of the problem.
i still think it's a bad router or isn't compatible with their system and since my/your isp only sees one computer with the router, i/you can't call when a problem comes up.
i'm in a single house and when the cable kids set it up they used a few different "t" connectors/resistors/capacitors, or whatever they were, to get the best signal.
when they left i tied it all together with the router.
good luck.
