[kitteh]

The most brutal thing I saw was when someone compromised a customer ISDN router (the small Ascend boxes with the curses UI) and changed the creds to login to their ISP and disconnected it and forced it to redial repeatedly. The local telco charged you for every ISDN call if it was a business line and since ISDN call initiaton/setup are instant - they had a several thousand dollar phone bill. I recall seeing the RADIUS server getting slammed with auth failure for days when that happened.

[jcims]

Yep!!! We had to tweak some settings because the router would constantly flap channels during DR tests and we were getting billed for the call setups (international ISDN calls were not cheap lol).

It was cheaper to have stable excess capacity.