DMR Standards by ETSI

The Digital Mobile Radio (DMR) standard represents a significant advancement in business mobile radio communications. Developed by the European Telecommunications Standards Institute (ETSI), DMR is tailored for professional users requiring efficient, reliable, and secure communication systems. This blog explores the core components of the DMR standard as defined by ETSI, offering insights into their design, purpose, and benefits.

ETSI TR 102 398: General System Design

The ETSI TR 102 398 document outlines the general system design for Digital Mobile Radio systems. This technical report provides the foundational guidelines necessary for the efficient planning, implementation, and operation of DMR networks. It serves as a comprehensive resource for engineers and designers, detailing considerations for network architecture, interoperability, and compatibility with existing communication infrastructures. The aim is to ensure that DMR systems are robust, scalable, and capable of meeting the diverse needs of business users worldwide.

ETSI TS 102 361-1: DMR Air Interface (AI) Protocol

Part 1 of the DMR standard focuses on the Air Interface (AI) protocol, which is the heart of DMR communication. ETSI TS 102 361-1 specifies the technical requirements for the radio interface between DMR devices. This includes modulation methods, frequency bands, and signalization, ensuring seamless and efficient transmission of voice and data over the airwaves. By standardizing the air interface, ETSI facilitates interoperability between different manufacturers' equipment, enhancing the flexibility and accessibility of DMR systems.

ETSI TS 102 361-2: DMR Voice and Generic Services

ETSI TS 102 361-2 delves into the specifics of DMR voice communication and generic services. This part of the standard defines the audio encoding techniques used to digitize and compress voice signals, as well as the protocols for call management and supplementary services such as messaging and emergency signaling. The document ensures that DMR systems provide clear, reliable voice communication while also supporting a range of additional services to meet the comprehensive needs of modern mobile communication.

ETSI TS 102 361-3: DMR Data Protocol

The third part of the DMR standard, ETSI TS 102 361-3, addresses the data protocol aspect of DMR systems. This section specifies how data is transmitted over DMR networks, enabling services such as text messaging, GPS location tracking, and telemetry. By providing a framework for data services, this document expands the utility of DMR beyond voice communication, supporting a wide array of applications crucial for efficient business operations.

ETSI TS 102 361-4: DMR Trunking Protocol

Finally, ETSI TS 102 361-4 focuses on the trunking protocol for DMR systems, essential for managing communication channels within large-scale networks. This part outlines the procedures and protocols for channel allocation, call setup, and resource management, ensuring optimal usage of available bandwidth and minimizing communication delays. The trunking protocol is a cornerstone for DMR Tier III systems, enabling effective coordination and communication across extensive, multi-site operations.


Each of these documents plays a critical role in the development and deployment of DMR systems, contributing to their reliability, efficiency, and adaptability. The DMR standards set by ETSI have paved the way for a new era of professional mobile radio, offering enhanced communication solutions for businesses worldwide.

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