A Connecticut company has become a commercial client of Eastern Bank, a Boston-based bank that went public last month.

Rocky Hill-based Alarm New England is Eastern Bank’s new commercial banking customer, the bank said in a statement.

The bank said it is providing solutions for Alarm New England’s financing needs, including a revolving line of credit for working capital and expansion, as well as comprehensive cash management services and solutions.

“Alarm New England has been serving individuals, families and businesses with security products and services for nearly 50 years, and we have grown locally into a leading alarm company in the region,” Doug Curtiss, CEO and founder of Alarm New England, said in a statement. “We’re pleased to work with Eastern Bank for our capital and financing needs to support our plans for growth.”

Founded in 1972, Alarm New England is a family owned and operated provider of security solutions and technology, operating in Connecticut, Massachusetts and Rhode Island.

“For generations, families and businesses across our local communities have relied upon Alarm New England for security solutions, and we look forward to serving as its banking partner,” Greg Buscone, executive vice president and senior commercial banking officer of Eastern Bank, said in the statement.

Eastern Bank was long known as the country’s oldest and largest mutual bank before converting to a stock bank in October. The bank had more than $15 billion in total assets of Sept. 30 and operates branches in Eastern Massachusetts and New Hampshire. The bank raised $1.79 billion in its public offering.