ISP tech support could not provide support for the ISP issued router
I had a Bell ISDN router decide it was going to be a wifi and wired router along with dhcp rather than maintaining it's configuration as a ISDN to cat6 bridge. It took the external IP and started issuing internal IP rather than passing the external IP to the actual network router.
We called Bells support people who aperently, can't provide any better support for business customers than they provide for home users. "Uh, I have no idea how you can fix that sir."
Me and the next hour with google and digging through that misserable ISDN modem's settings finally fixed it with some archaine settings about three layers of forms down.
I'll call support if the line goes down but other than that, it's just assumed that they've nothing in there help scripts to read too me.