(Updates with Telmex statement)
By Cassandra Garrison
MEXICO CITY, Aug 31 (Reuters) - Telmex, the Mexican telecommunications firm controlled by the family of tycoon Carlos Slim, on Wednesday sent union workers a new offer that included improvements to retirement benefits for new staff.
In a company document shared with union workers and seen by Reuters, new hires would upon retirement get a pension worth 100% of their final net pay, determined by their job category, becoming eligible after 35 years of work and once they turn 65.
That sum would be made up of the pension paid out by the Telmex contract plus worker entitlements with the state-run Mexican Social Security Institute (IMSS), it said.
The Mexican Telephone Workers Union, known as STRM for its Spanish acronym, is expected to present a counter-proposal, according to a union spokesman who added that the company's overall offer lacked some points the union aimed to address.
Telmex said in a statement that the parties involved, including Mexico's labor ministry, agreed to continue negotiations until Sept. 20.
The union, which represents 60,000 active and retired workers, began a two-day strike on July 21, the first in four decades, after talks with Telmex broke down over issues including salary raises, unfilled job openings and benefits for new hires.
The strike ended the next day following government mediation when Telmex, a unit of Slim's America Movil, and the union agreed to participate in a committee that had 20 days to present solutions to the dispute.
Telmex's proposal aims to sweeten benefits, including via support for new hires acquiring houses through Infonavit, the largest state body that finances housing.
The company's offer apparently did not address some previous sticking points, including nearly 2,000 unfilled job openings.
Telmex said it wanted to boost its funds over the next 10 years and invest them in technology and creating new business.
"We must optimize our resources or reduce our expenses in order to make this possible," it said in its proposal. "We must give the company some air." (Reporting by Cassandra Garrison; Editing by Isabel Woodford and David Gregorio)