Radioddity has updated the DM-5R listing with this cryptic note about Tier II support:
“Support DMR repeater function (DMR Tier I; support Tier II if upgraded with less than $10)”
DMR Tier II & Tier III: what’s the difference?
Digital Mobile Radio (DMR) was originally developed as a direct replacement for analogue private mobile radio to provide cost-effective, low-complexity digital radio solutions for transport and utilities.
Offering digital audio quality, better spectral efficiency, improved data capability and enhanced portable battery life, DMR has now expanded its scope to include business-critical and commercial communications.
The DMR suite of standards is developed and managed by ETSI in conjunction with vendor members of the DMR Association, which also ensures multi-vendor interoperability and promotes the technology. The standards are defined in operational ‘tiers’:
Tier I specifies short range licence-free low power operation, mainly for personal or recreational use.
Tier II specifies conventional operation in licensed bands.
A licence from a national regulator allows radios to operate at a higher power, allowing them to transmit over longer distances, and in a dedicated part of the radio spectrum. Communication services may feature repeater networks, advanced call services, data services, telephone interconnect, dispatch connection and secure communications.
Tier III adds full digital trunking operation to Tier II capabilities, based upon the MPT1327 analogue trunking open standard, whereby radio channels that are available can be shared amongst users more efficiently.
On Tuesday the 7th of April 2020, a remarkable contact was made on the FT8 digital mode on 432 MHz between D4VHF on the Cape Verde Islands off the coa... Read more
What is DMR? Digital Mobile Radio (DMR) was developed by the European Telecommunications Standards Institute (ETSI) and is used worldwide by pr... Read more
FR5200H / FR6200H IDAS VHF/UHF Digital Repeaters 50W 100% Duty cycle operation Employing a high performance power amplifier, together with the solid h... Read more
On May 30, operators at WX4NHC at the National Hurricane Center (NHC), working from home, conducted the annual readiness check of the station and of o... Read more
“The Automated Packet Reporting Service is a digital real-time communications system to share tactical information and messages. The most common... Read more
EI3KD and EI4DQ both spotted our 2m beacon from qth locator IO51 for a distance of almost 4200 km. At 15.11 Z of May 20th,2015 rs... Read more