Wireless networking solutions provider Rajant Corp http://www.rajant.com/ announced that its BreadCrumb wireless system has been approved and listed by the West Virginia Office of Miner’s Health, Safety and Training for use by mining-permit holders. The system consists of a mesh-networking solution that connects laptops and voice-over-IP telephones up to 3,200 feet from the mine communications center. Battery-powered wireless access nodes enable voice and data communications across a meshed, self-healing network and communicate with other IP-based client devices such as sensors, video cameras, laptops and satellite terminals, according to the company.