Communications Workers of America (CWA) and International Brotherhood of Electrical Workers represent over 37,000 employees of the wireline business, which includes FiOS Internet, telephone, and TV services.

Unless Verizon reconsiders its stance on unsettled issues, wireline workers will stage the walkout starting at 6 a.m. EDT on Wednesday, CWA President Chris Shelton said on a media call.

“Verizon has forced us there … Nobody wants to go on strike,” Shelton said. “It’s a hardship for our members and our families, it’s a hardship for customers.”

Verizon and the unions, which represent Verizon workers from states such as Massachusetts, Virginia, New York, and Rhode Island, have been in talks over the company’s plans to cut healthcare and pension-related benefits over a three-year period since June. Wireline workers have been working out of contract since the last agreement expired in August.

While a compromise on healthcare plans has been reached, dispute over offshoring call center jobs and pensions still remain, union representatives said.

“We’ve tried to work with union leaders to reach a deal,” said Marc Reed, Verizon’s chief administrative officer, said in a company statement.

The company said it is fully prepared to serve its customers in the event of a strike.

During the last round of contract negotiations in 2011 also led to a strike.