Key Features:

• Spectrum Efficiency: By utilizing two time slots, DMR doubles the capacity of existing 12.5 kHz channels, allowing more users to communicate without interference.
• Audio Quality: DMR provides consistent, clear digital audio quality throughout the coverage area, eliminating the background noise and static common in analog FM.
• Talkgroups & Networking: DMR uses "Talkgroups" to organize traffic. Through digital networks like BrandMeister or DMR-MARC, local repeaters can be linked globally over the internet, allowing users to communicate across states or continents.
• Data Capabilities: In addition to voice, DMR supports various data features including GPS location reporting, short text messaging, and status updates.
• Configuration: DMR radios require a "Codeplug," a specific configuration file that contains channel data, talkgroup lists, and repeater settings, which must be programmed into the radio before operation. Codeplugs are relatively complex and are usually created and edited with an off-radio application and the finished codeplug then imported into the radio.
• DMR supports encryption which is not supported in other amateur digital modes such as D-STAR and System Fusion.

More DMR

DMR is arguably the most popular digital voice mode on VHF and UHF today. It was initially popular for business use and still is. DMR rapidly grew in popularity for non-business use with the proliferation of cheap Chinese handheld DMR radios. Transmitting with DMR requires an amateur radio license and registration with the DMR network.

Note: RadioID has recently instituted an annual user verification process. Each year they will send an email to the registered email address which must be responded to verifying that the DMR ID is still needed. Otherwise the ID will be deactivated and, after a period of time, will be made available for reassignment.

The largest DMR network is Brandmeister. It connects the largest worldwide network of open DMR repeaters. The digital voice network is open to all licensed amateurs and completely free.