Comcast phone service crashed Tuesday at some business in Baltimore and around the country.
Comcast Business acknowledged "issues receiving and making calls," but provided few details on the extent of the outage, which last until late Tuesday night.
"We sincerely apologize for the inconvenience this issue has caused our business customers," spokeswoman Jamie Debole said in an email.
The outage silenced phones at Aldo's Italian Restaurant in Little Italy.
"It's not as though we're a phone-only business, so it's not devastating, but it certainly interrupts," said Sergio Vitale, the chef and owner. "In the digital age, you underestimate the value of a landline connect, but the fact of the matter is we get reservation requests on our voice mail."
Amiccis of Little Italy, by Facebook, encouraged hungry families to make reservations on its website.
It was unclear what time the outage started. Calls ended at Aldo's sometime Tuesday afternoon, Vitale said.
"The problem is that party of 20 or 40 who's calling to make a reservation and can't get through, and saying they'll go to another restaurant," Vitale said.
Tuesday night, Comcast Business reported on social media the problem had been isolated and crews were working to restore service.
Both Amiccis and Aldo's were able to receive calls around 10 p.m. Comcast Business reported at 11:15 p.m. that it had restored service.