Digital Mobile Radio (DMR) is a digital radio standard specified for professional mobile radio (PMR) users developed by the European Telecommunications Standards Institute (ETSI), and first ratified in 2005.
The standard is designed to operate within the existing 12.5kHz channel spacing used in licenced land mobile frequency bands globally and to meet future regulatory requirements for 6.25kHz channel equivalence. DMR provides affordable digital systems with low complexity and offers voice, data and other supplementary services. Today, products designed to its specifications are sold in all regions of the world.
The DMR protocol covers unlicensed (Tier I), licensed conventional (Tier II) and licensed trunked (Tier III) modes of operation, although in practice commercial application is today focussed on the Tier II and III licensed categories.
One of the major advantages of DMR is that it is an ETSI open standard and the DMR Association administers an interoperability programme which ensures compliance to the standard. Interoperability is key to the success of DMR and provides customers with vendor choice. All of the Simoco Xd range of products fully comply to the ETSI standard and their operation does not rely on any non-standard proprietary features to operate.