Unifi/EdgeSwitch?
Yeah. Unfortunately. USW-24-250.
Yeah, you know when 24v passive POE is turned on because it kills the
port on the other end that aren't designed to handle it. Your router
would likely have a dead eth port on it.
I've never tested it with one of my routers, but a tech did accidentally test it on a UniFi AP. I'm still not sure how he ignored the warning about sending 24 volts down the line, but the WAP didn't like it and decided to refuse to work with anyone ever again. ;)
-A