Digital Mobile Radio (DMR) is trusted by over 15 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.
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.
DMRA News & Events
Introducing the revised TS102 361-4
V1.11.1 - Part 4 trunking protocol
This update followed the ETSI agreed process of submission of proposals by TGDMR members and input of suggestions by DMR Association members through the DMR Technical Working Group. Version 1.11.1 has further enhancements as seen from item 18 onwards over what was previously published in 1.10.1 in 2019.
The DMR Association or pleased to welcome SunTalk LLC who join us as a category 3 member. SunTalk are a leading Motorola Solutions Channel Partner operating a wide area Connect Plus system in South Florida USA. Visit Members page >
The DMR Association are pleased to welcome Highland Wireless Services as a category 3 member. Established in 2001, HWS operate the largest private carrier 470-512 MHz trunked radio network in Florida USA.
Visit Members page >
Category 2 & 3 members: opportunity to drive improvements
We know how important it is for Users and Operators to communicate their needs to the Industry in order to continually deliver the best service.
As such the DMR Association is creating a dedicated User Group for category 2 and 3 members to provide a means to communicate with each other. There will be no joining fee for DMR members.
The voice of the User Group will be used as a valuable tool to inform DMRA manufacturers and technical working group members of the issues that are important to you, such as improvements to the ETSI DMR standard.
If you'd be interested in joining the User Group, email email@example.com Thank you.
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 >