The DMR Association is dedicated to continually support and improve the international digital radio standard to elevate the customer experience.

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The DMR air interface provides coverage similar to analogue, offering the benefits of digital without the need to increase the number of repeater sites.

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The DMR Association’s application interface showcases the powerful features available to digital mobile radio system users.

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DMR is trusted by over
15 million users worldwide

Our resolute team are proud to provide unrivalled support to its global members and the assurance that digital mobile radio is the most widely used digital radio standard for the business world.

The DMR Association’s mission, since 2005, has been to support the European Telecommunications Standards Institute during the DMR standardisation process. To provide the ultimate service to our members we focus on the commercial applications of DMR comprised in Tier II and Tier III.

We welcome new members from across the globe. Whether you are a business that utilises DMR, or an individual that supports the professional use of the DMR standard, you’ll be in great company. We truly appreciate your help in enabling us to drive forward our mission.

DMR Association Mission

Improving standards:
Elevating experiences

We combine our knowledge and expertise with education, awareness, certification, and interoperability training to guarantee that today’s digital radio technology customers experience the highest level of service. We invest our time and energy to futureproof your investments.

As a member of the DMR Association you’ll benefit from the frequent and direct communications that we hold with global regulators, trade bodies and standards organisations. We are committed to ensure that all DMR products reach the market within a successful, open, multi-vendor chain and that our members gain from continuous, competitive development.

The power of DMR technology continues to expand possibilities and is enjoyed by over 15 million users worldwide.

Our members are companies, organisations and individuals who use or build DMR products professionally or those working to support the DMR standard in other ways.

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Please join us in welcoming
Bharat Electronics Limited
as a category 1 member.

Bharat Electronics Limited, was established in Bengaluru in 1954 by the Government of India under the Ministry of Defence. Bharat Electronics Limited (BEL) is a Navratna PSU and India’s foremost defence electronics company. Bharat Electronics also provide a wide range of professional services to non-defence business sectors from Voting Machines to Cyber Security. Visit Members page >

Welcome Bharat Electronics to the DMR Association
Welcome IP Connect to the DMR Association
Welcome IP Connect

IP Connect Sp. z o.o, established over 30 years are one of the most effective integrators of radiocommunication systems across Poland. IP Connect provides mission critical solutions in TETRA, DMR, analog & PoC for public safety, public transport & most commercial markets.
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Welcome Frequentis to the DMR Association
Welcome Frequentis

Frequentis is an international supplier of communication and information systems in safety-critical markets, particularly the emergency services and organisations involved in civil or military air traffic management (ATM), the rail sector and shipping.
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Welcome Sanchar to the DMR Association
Welcome Sanchar Telesystems

Sanchar Telesystems Limited (STL) was founded in 2006 and over the years has emerged as a market leader in wireless communication in India. STL offers state of the art communication solutions to public safety, railways and commercial customers across the country.
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DMR applications interface standards unify interoperable voice and data solutions across multiple technologies and manufacturers.

The interface was developed by members of the DMR Association with the goal of enabling applications to benefit from interoperability between an application and DMR infrastructures from different vendors.

Application Interface (AIS)

Key features of the DMR standard

  • Interoperability between manufacturers
  • Backwards spectrum compatibility
  • State of the art Forward Error Correction
  • IP Data
  • Fast Automatic Vehicle Localisation (AVL)
  • Optional encryption for secure communications
  • Doubling of capacity in existing channels
  • Data applications interface (AIS)
  • Two-slot Time Division (TDMA) operation

DMR enables a single 12.5 kHz channel to support two simultaneous and independent calls. This is achieved using TDMA, Time Division Multiple Access. Under TDMA DMR retains the 12.5 kHz channel width and divides it into two alternating timeslots A and B where each timeslot acts as a separate communication path.

Each communication path is active for half of the time in 12.5 kHz of bandwidth, each uses an equivalent bandwidth of half x 12.5 kHz or 6.25 kHz. This is known as having an efficiency of one talk path per 6.25kHz of spectrum. However with DMR the channel as a whole maintains the same profile as an analogue 12.5kHz signal.

This means that DMR radios operate in the licence holders existing 12.5 kHz or 25 kHz channels; there is therefore no need for re-banding or re-licensing but at the channel capacity is doubled. Read More >

DMR Double Capacity

Optimising standards, extending capabilities, and reducing costs through the creation of multiple and mutually compatible products.

The primary goal is to specify affordable digital systems with low complexity. DMR provides voice, data and other supplementary services. Today, products designed to its specifications are sold in all regions of the world.

The DMR Standards