Comcast customers in the United States came back online on Friday afternoon after a massive failure left them with no internet, cable television, and telephone service.
The failure began on Friday morning and quickly spread to several cities, including New York, Philadelphia, Atlanta, San Francisco, Denver and Chicago, according to Downdetector.com, a website that monitors service outages.
The claim peaked early in the day, but problems with the Comcast service occurred well into the afternoon. In some cases, the outage lasted most of the afternoon, but Comcast said in a tweet on Friday evening that he had begun to restore the service.
The company was trying to figure out what went wrong, but said in a statement that "one of Comcast's big backbone network partners had a fiber-optic cut that we believe has impacted other vendors."
The company could not say how many people were affected by the "nationwide" failure.
Fiber Optic Cables Used for High-Speed Long-Distance Data Transmission
Customers used their mobile phones and mobile devices to complain loudly on Twitter. Some reported that it was difficult to reach the Comcast customer service. The company participated in Twitter to provide updates, and urged customers not to call 91