Union workers at Hawaiian Telcom, the state’s largest telephone company, have voted to ratify a five-year collective-bargaining agreement that will go into effect Jan. 1 and last until Dec. 31, 2017.

The agreement, which was announced today, includes annual wage increases, a 401(k) matching program, and a fixed-percentage employee contribution to health insurance premiums.

HawTel and union leadership of the International Brotherhood of Electrical Workers Local 1357 jointly announced to employees a tentative agreement on Dec. 14 and union leaders then met with members statewide to discuss the contract. A ratification vote was conducted by mail over the past two weeks.