In eleven coals mines of KW SA the DGT Hetman system provides dispatchers with access to special alarm and maintenance functions customized to the specifics of an enterprise operating on a continuous basis and having high requirements as to the quality and reliable communication. DGT Hetman works with metanometric company systems and processing visualization systems. The system is adapted to operate in harsh and hazardous environmental conditions (ATEX), it is possible to use specialized intrinsically safe barriers, telephones and telephone signalling devices of different manufacturers.