PORTLAND, Maine — An outage disrupted Time Warner’s high-speed Internet and digital telephone service throughout the Northeast on Wednesday morning, but service was restored in an hour.

Time Warner spokesman Andrew Russell said the outage, which occurred at 8:40 a.m., affected service in the Northeast, including all phone and Internet customers in New England. He said service was restored at 9:40 a.m.

Time Warner engineers are investigating the cause of the outage, Russell said.