Motorola, with their offering of Mototrbo, have developed a parallel offering of DMR devices and technology. They are the most successful manufacturer in DMR, contributing in excess of 3 million users to the subscriber base. Mototrbo uses the Over the Air Protocol specified by ETSI fitting two time slots in to 12.5 KHz. However, Mototrbo is different from the three tiers of ETSI standards as they have extended the features and services proving a vast array of applications and a huge portfolio of products. It also provides some compatibility with Tier III.
Another huge advantage of having Mototrbo DMR is the availability of Applications. Mototrbo has the largest catalogue of value added applications available ranging from simple man down alarm forwarding to complex Command and Control Centre Dispatchers. (Mototrbo is often referred to as “Tier II and a half” because of its functionality extending beyond Tier II features.)