Earthlink DSL/Voice bungle.
I had only one problem with my DSL line for about 9 years, and that due to a line-person disconnecting me down the street. Then I swallowed the bait. Earthlink offered to bundle my DSL service with a limited minutes voice plan that gave me voice for free. I demanded that they leave my dedicated DSL line and my separate dedicated voice line as they were. No Changes they promised several times. Guess what? With the new service, I had no phone service until the phone was switched over to share the DSL line.
I could write a book about the consequences.
Intermittent slow...