Mine communication system tested in Pennsylvania
Aug 8, 2007 1:03 PM, - MRT
Ontario, Canada-based Vital Alert announced that its Through-the-Earth Communication digital communication technology sent very low frequency, or VLF, two-way voice signals to depths of more than 300 feet in the government-owned Lake Lynn Mine located in Pennsylvania. The surface-to-underground system test connected Sprint’s i325 radios, located on the surface and in the mine, using the company’s underground radio system that was supported by Raytheon’s JPS Communications ACU-1000. In addition, the company said the system interoperated with the mine’s existing land-mobile-radio communication infrastructure.
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