The proposed 3-year agreement, which is subject to member ratification in coming days, includes annual pay and pension contributions for future retirees over the life of the contract, the company and the union said.
AT&T said its workers would be paying more than before for health care under the new contract.
Contracts covering another roughly 101,500 workers, or about a third of AT&T's workforce are still under negotiation.
The company and the union said they hoped that the current agreement means they can move forward with the other negotiations.
AT&T shares rose 41 cents, or 1.75 percent, to $23.86 on the New York Stock Exchange at mid-afternoon.
(Reporting by Sinead Carew; Editing by Richard Chang)