DMR - Trusted by 12 Million Users
Welcome to the DMR Association; we’re here for our members, working worldwide, to continuously reaffirm Digital Mobile Radio as the most widely used digital radio standard for the business world.
We began in 2005 as a group of market leading public mobile radio manufacturers to support ETSI during the DMR standardisation process.
The DMR Association’s Technical Working Group works constantly on the Interoperability process, providing standards certification for manufacturers, the majority of which is at the highest Tier 3 specification. Membership is open to all organisations or individuals where DMR is a regular part of their business and for those working to support the professional use of the DMR standard in other ways.
News and Events
The DMR Association is delighted to welcome
Tom Bohn (Motorola Solutions) as Chair of the Technical Working Group.
Tom has been an active member of the group for several years and recently played a key role in improving the DMR feature set. We'd like to take this opportunity to thank Tom for his continued commitment and wish him all the best in his new position.
Mario Micheli - Chair of the DMR Association
A warm welcome to JSC T-Helper Telecom who join the DMR Association as a category 2 member. JST are a Russian technology company with more than 27 years’ experience in radio trunking technology including Tetra and DMR. Visit Members page >
The DMR Association are pleased to welcome KB PULSAR-TELECOM from Russia, a developer and manufacturer of professional communications equipment since 1992. They join us as a Category 1 member. Visit Members page >
By using a combination of education, awareness, certification and interoperability training we operate to make sure that business buyers of today’s digital radio technology have the security of knowing that they are investing in the future.
Here at the DMR Association we provide our membership with the resources necessary to make certain that DMR products reach the market within a successful, open, multi-vendor chain. We’re in frequent and direct dialogue with regulators, trade bodies and standards organisations around the world to maintain the standard.
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 >