Why DMR? DMR (Digital Mobile Radio) was originally for Business but has been adapted for use on the Amateur Bands. It is an open standard using TDMA (Time Division Multiple Access) as its mode of transmission and is fully digital throughout the transmission path, including network switches, repeaters and radio handsets. It uses what are known as two timeslots, Timeslot one will transmit for 30 milliseconds then rest for 30 milliseconds then transmit for a further 30 milliseconds and so on. But none of the voice contact is dropped in this process, you’ll still hear it as it is spoken. That will also be the same for Timeslot two, confused? Don’t be, trust me you’ll get used to it believe me, there are many video’s out there that explain the whole process. I regard DMR second in the list of Digital modes, behind C4FM but ahead of Dstar for clarity, although Dstar is certainly the busiest. There are currently two versions of DMR, these being Phoenix and Brandmeister, there is a sort of North/South divide with Phoenix being active down South and Brandmeister up North, although saying that, the new Romford repeater is Brandmeister. DMR uses a thing called a Colour Code on it’s repeaters which has absolutely nothing to do with colour whatsoever, it’s like colour code 1 or colour code 2 etc, Colour codes being like a digital CTCSS for the repeater. DMR repeaters are fairly widespread across the UK but watch out for Brandmeister of Phoenix because radio programming is that little bit different. I’ve added a working Codeplug below that covers Phoenix and Brandmeister, hope it helps, however if you should encounter any problem using it I accept no liability whatsoever (not that you should get a problem) except that the codeplug is for a TYT MD380 or Retevis RT3