The Problem Solver called Comcast spokeswoman Angelynne Amores, who promised to look into the situation.
She emailed back two days later.
"We do not cap the total number of minutes on our residential unlimited voice plans," Amores wrote. "However, if our unlimited plan voice customers pass the 5,000-minute mark for long distance usage, we work to determine if they're violating our terms of service and using their residential service for non-residential purposes, which could range from running auto-dialing programs to operating businesses from their homes."
In this instance, Hartman exceeded the 5,000-minute threshold, which triggered the review process.
"We have spoken with the customer and are satisfied that she is using her service appropriately," Amores said. "We apologize for any inconvenience this may have caused."
Hartman said Comcast's response sounded reasonable.
"I can understand there are people who want to use a home account for business and they want to keep tabs on that," she said.
Still, the security employee who called her did not say she was under investigation, she said. He told her that if she exceeded the 5,000-minute cap again, her service would be canceled.
"They didn't say, 'Let's re-evaluate,'" she said. "They just said, 'We're warning you so you don't lose phone service.'"
Hartman said she has been told she can resume calling without concern that her service will be disconnected.
Still, she has mixed emotions about the situation.
"I'm grateful they resolved things for me but, obviously, they have to do some training," she said. "I don't want anybody to get their phone service turned off."