DMR is a PMR / LMR digital protocol intended for classic narrow band channels.
In developing the ETSI DMR Standard, the drafting group have conceived a wide-ranging menu of services and facilities from which manufacturers can develop and produce their radios.
Not all features and facilities would necesarily be embodied. The standards contain the ingredients from which manufacturers are able to select features to offer to the market.
To find out more, download this free white paper.