RF modules

Home > LMR Protocols > DMR

DMR Protocol Stacks

DMR is positioned as the ideal digital upgrade technology for analog and MPT1327 radio. It offers increased capacity and advanced digital features within existing channel plans and network footprints.

Etherstack is pleased to now offer DMR alongside our field-proven range of APCO 25, TETRA and MPT1327 protocol stacks. We know the ETSI DMR standards inside-out and offer compatible Mobile Station and Base Station protocol stacks as well as an all-IP network solution - allowing you to grow a single product into a family of products or complete network solution.

The DMR Standards

DMR is defined in ETSI standard TS 102 361 parts 1-4 and in the ETSI emissions compliance standards EN 300 113 and EN 300 390. DMR compliant products are suitable for use in most regulatory jurisdictions around the world, and meet Federal Communications Commission (FCC) mandates in the United States for the certification of 12.5 kHz and 6.25 kHz narrowband technology for systems covered by Part 90 regulation.

DMR uses 4FSK modulated two-slot TDMA radio access, allowing 6.25kHz efficiency within a 12.5kHz channel spacing. It is categorized into three "tiers": Tier 1 (European License Free), Tier 2 (Licensed Conventional (Repeater) systems) and Tier 3 (Licensed Trunking). Etherstack offers Tiers 2 and 3. As with all LMR standards, a range of supplementary services and data formats are also specified.

Interoperability is a priority; interoperability testing is co-ordinated and executed by the DMR Association.

Resources