Tyco already owns 89 percent of TyCom's shares, and the remaining stake represents about 56 million shares. The deal, which values TyCom shares at $15.42 -- a premium of 4.5 percent -- is based on Tyco's closing price Thursday of $49.20.
The move came after TyCom, an undersea-fiber-optic cable supplier, laid off 600 workers, representing about half of its work force in New Hampshire. TyCom, a subsidiary of Tyco, blamed the cuts on a slowdown in the telecommunications industry and the sluggish economy.