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DMR is an open and published international digital radio standard that specifies the 2-slot (channel) TDMA communications. DMR is amateur radio's newest digital protocol. It was developed for commercial use, however, ham radio now has approval to use DMR.DMR is an open and published international digital radio standard that specifies the 2-slot (channel) TDMA communications. D It was developed for commercial use, however, ham radio now has approval to use DMR. MR is amateur radio's newest digital protocol. Motorola does not own theDMR standard. MOTOTRBO is DMR. The manufacturers of DMR equipment have agreed to use the ABME2+ vocoder algorithm from DVSI Inc. - ABME2+ is licensed by DVSI Inc.