Engineers Make First Wireless Call From Mine

Rajant Corp. said Tuesday it teamed with Sanmina-SCI and Hannah Engineering to make the first wireless call from 1,000 feet deep in a Pennsylvania coal mine to multiple outside extensions amid continuing complaints that wireless technology has not kept pace with new federal safety regulations. Malvern, Pa.-based Rajant said the calls was made from a National Institute of Occupational Safety and Health (NIOSH) facility near Pittsburgh to multiple above-ground sources in keeping with mandates imposed by the state of West Virginia and the federal Mine Improvement and New Emergency Response (MI...