I had an ISA dialup modem that got hit by lightning. Loud boom then my DUN connection hung up. When it came back, that modem still worked, but it was stuff "of

I had an ISA dialup modem that got hit by lightning. Loud boom then my DUN connection hung up. When it came back, that modem still worked, but it was stuff "off the hook" forever. I had to unplug/replug it every time I wanted to dial out, and the phone line was permanently busy.