Digital Mobile Radio (DMR) is an open digital radio standard for Professional Mobile Radio (PMR) users specified in the European Telecommunications Standards Institute (ETSI) Standards. Its primary goal is to specify a digital system with low complexity, low cost and interoperability across brands, acting as a direct replacement for analogue PMR. DMR provides voice, data and other supplementary services. DMR is a two-slot, Time Division Multiple Access (TDMA) system offering voice, data and a range of other features and applications.