French telecommunications equipment maker Alcatel said Wednesday it will cut more than 3,000 jobs in its undersea network cable and optical fiber units, adding to broader job reductions announced earlier this year. 

Alcatel, citing a downturn of the undersea network market and a slowdown in the optical fiber market, said the cuts will come mainly in Australia, France, the United Kingdom and the United States. They will amount to about one-third of the combined work force in the two businesses. 

In July, Alcatel announced plans to cut 16,000 jobs this year amid an industry downturn that chief executive Serge Tchuruk said was ``leaving no participant unscathed.'' 

The decision announced Wednesday will eliminate 2,151 jobs in Alcatel's undersea network business. It will trim another 887 jobs in the company's fiber-optics business worldwide.