OK, I'm a moron. File this thread under "I didn't think about the obvious". I finally updated the default admin login after doing my migration from my old ISY hardware to the Polisy/PG3 a couple days ago. Forgot about having to update the Polisy IOX password for the connection. After I rebooted the Polisy, the connection to the IOX showed disconnected. That finally joggled my old brain into "OMG, what an idiot". Sorry for the fire drill. Completely my fault. All is working again. Thanks!