The union that represents MBTA train and bus operators is objecting to state a tough new policy against cellphone possession by operators issued by state officials.

The Boston Carmen’s Union ATU Local 589 says it’s “deeply disturbed” by the new policy, which calls for any train or bus operator found with a cellphone to be suspended for 30 days and recommended for firing.

The union says in a statement posted on its website that there are times when “alternative communications” are needed on a bus for “everyone’s protection” and the MBTA had offered no solution to that problem.