Supporting the
ETSI DMR Standard

The Digital Mobile Radio Association plays a crucial role
in the continued success and evolution of DMR technology, ultimately aiming to elevate the user experience.

DMR splits one channel into two, instantly doubling your capacity without requiring investment in new repeater sites or additional frequencies.

By introducing the AIS application interface, the Digital Mobile Radio Association has redefined user capability, offering a sophisticated toolkit for advanced functionality and control.

Join a global network of over 15 million users. As the driving force behind Digital Mobile Radio, our dedicated team provides unmatched support and expertise to our growing international community.

Driving Excellence Since 2005 - The DMR Association’s core mission is to support the European Telecommunications Standards Institute (ETSI) in the continuous development of the DMR standard. We focus specifically on optimizing commercial applications across Tier II and Tier III.

Shape the Future of DMR - We warmly welcome all businesses who champion the professional use of Digital Mobile Radio. By becoming a member, you help us advance this vital technology and define the next generation of communication standards through collaborative industry leadership..

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.

Ultimately, our goal is to turn technical complexity into market opportunity. Through structured education and verified interoperability, we provide the clarity and consistency needed for the industry to thrive.

The Technical Working Group: Driving The Standard

The Mission: Our focus is the Interoperability (IOP) of Digital Mobile Radio equipment. We maintain the official framework that enables products from different manufacturers to work seamlessly together. To achieve DMR Association certification, manufacturers must successfully complete testing according to our established IOP Test Suites.

The Solution: To streamline this process, we provide advanced software tools designed to automate and standardize IOP validation. By verifying device behavior against a centralized reference, we ensure that test results are consistent, objective, and easily auditable across the industry.

Access & Participation These IOP Tool Applications and Documentation are available exclusively to Category 1 members via the DMR Association website.

We strongly encourage Category 1 members planning to participate in IOP test sessions to download and utilize these applications. Your active use and technical feedback are vital to the continuous improvement of our testing environment.

Breaking down proprietary barriers, the DMR Applications Interface (AIS) delivers a standardized way for applications and networks to interact, driving a more open and flexible digital radio ecosystem.

Application Interface (AIS)

DMRA News

The DMR Association is delighted to announce that Telox has joined our membership as a Category 1 manufacturer.

Founded in 2014, Telox is a fast-growing provider of mission-critical communication solutions with deployments in over 80 countries. Their portfolio bridges the gap between traditional PMR and future technologies by offering hybrid terminals that combine narrowband DMR with LTE, 5G, PoC, and MCX. These resilient, long-range solutions deliver both voice and broadband data services to essential sectors, including public safety, security, utilities, transportation, and industry.

Backed by strong R&D, advanced manufacturing, and 24/7 support, Telox is committed to providing reliable, high-value tools that integrate seamlessly with the DMR standard.

Welcome Autostrade per l'Italia

ASPI is Italy's largest motorway concessionaire, responsible for managing thousands of kilometres of critical national infrastructure. The Group is driving a major digital transformation.

Welcome CRTE

CRTE is a National Top-Level Partner of Motorola Solutions (China) Corp., specialising in robust communication systems and mission-critical services tailored for rail transport and other high-stakes sectors.

Welcome CST Advanced Systems

(CST) designs, manufactures, and integrates high-bandwidth audio, video, and data transmission systems. As India's reliable defense, security & military partner, they specialise in IP MANET and software-defined radios, microwave, and other communication systems.

The DMR Association: Your trusted partner for digital radio success, boasts a diverse membership of over 200 organisations from around the world who play a crucial role in the development and widespread adoption of DMR technology.

Members of the DMR Association >

Key features of the DMR standard

Interoperability between manufacturers
Backwards spectrum compatibility
State of the art Forward Error Correction
Options for traffic encryption

IP Data
Fast Automatic Vehicle Localisation (AVL)
Optional encryption for secure communications
Direct Mode of operation

Doubling of capacity in existing channels
Data applications interface (AIS)
Two-slot Time Division (TDMA) operation
Green credentials

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

Our members' mission is to deliver affordable, low-complexity digital systems. We are dedicated to optimizing these protocols and extending capabilities while reducing costs through a diverse ecosystem of compatible products.

Members products showcase >