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The Emergency Voice Communications System (EVCS) is for use as a Fire Telephone system, Disabled Refuge Call system or as a combined system when both FireTelephones and Disabled Refuge Points are required. EVCS Network 8 is a system for larger installations. Its distributed loop architecture provides a competitive system for systems from 8 to 256 communication points as well as multiple control locations.Designed to comply with BS5839 Part 9 2011 the EVCS is a fixed, secure, bi-directional fully-duplex voice communication system, to assist fire fighters within high rise buildings or large sites where radio communication may not be possible. Where both a fire telephone and disabled refuge system are fitted to a building BS5839 Part 9 specifies these should form a single system.