DMR (Digital Mobile Radio) is an open digital radio standard first approved and released by the European Telecommunications Standards Institute (ETSI) in 2005. It was designed as a low‑cost alternative to traditional analog two‑way radio systems, using two‑slot TDMA (Time Division Multiple Access) technology on 12.5kHz channels to deliver twice the communication capacity in the same bandwidth.
DMR is defined across three tiers:
MANIRON M-3500 is a digital repeater fully compliant with DMR Tier II while maintaining backward compatibility with existing analog systems.
The M-3500 supports analog and digital dual‑mode operation, configurable via programming software. This means:
For users migrating from analog FM systems, each analog base station/repeater can be replaced by one DMR repeater — channel capacity doubles immediately.
The M-3500 uses TDMA dual‑slot technology, providing two independent communication slots within a 12.5kHz channel — supporting two simultaneous conversations.
What this means for users:
The M-3500 supports up to 640 channels (32 channels per group) with selectable 12.5kHz and 25kHz channel spacing. This flexibility enables adaptation to frequency planning requirements across different countries and regions:
The M-3500 is offered in three frequency band versions:
These bands cover the world's mainstream professional mobile communication frequencies, adapting to licensing requirements in different countries and regions.
Transmit power of the M-3500:
High‑power output means wider coverage. Compared to low‑power repeaters (5‑25W), a 50W output — with the same antenna system and mounting height — can cover several times the area of lower‑power devices.
The M-3500 supports optional IP interconnect via its RJ45 port, enabling wide‑area voice and data communication across regions.
IP interconnect technology connects multiple DMR Tier II repeater sites over Internet Protocol (IP), forming a wide‑area communication network. This means:
For organisations with multiple dispersed sites (chain enterprises, cross‑region logistics, large campuses), IP interconnect upgrades the M-3500 from a standalone local repeater to the core node of a wide‑area communication infrastructure.
The RJ45 port on the M-3500 supports not only IP interconnect but also:
The M-3500 supports a complete DMR feature set:
The M-3500 uses a standard 1U rack‑mount design (dimensions: 485mm × 405mm × 44.5mm, weight: 8.5kg), supporting:
The ultra‑thin 1U design allows multiple repeaters in a single rack, saving valuable equipment room space. For large‑scale projects requiring multi‑band or multi‑site deployment, this compact design significantly reduces rack footprint and deployment costs.
The M-3500 supports an operating temperature range of -30°C to +60°C with an intelligent temperature‑controlled fan system:
The M-3500 is suited for a wide range of professional wireless communication applications:
Large factories and industrial parks have complex internal communication needs: between factory buildings, inside workshops, outdoor yards. The M-3500's 50W high‑power output and IP interconnect capabilities can build a reliable communication network covering the entire facility.
Underground and open‑pit mines demand extreme reliability and coverage from communication equipment. The M-3500's wide operating temperature range (-30°C to +60°C) and rugged rack‑mount design make it suitable for the harsh conditions found in mining environments.
Large residential communities, commercial complexes, campuses — security and property teams need instant, reliable communication. The M-3500's Individual Call, Group Call, and Emergency Alarm features perfectly match security communication requirements.
Communication coverage along subway lines and railways requires long‑distance, high‑reliability repeater solutions. The M-3500's IP interconnect supports multi‑site networking along the line, providing seamless end‑to‑end communication.
For enterprises with multiple branches across different regions, the M-3500's IP interconnect can integrate DMR systems in different cities into a unified wide‑area communication network.
The M-3500 supports both analog and digital operation, so organisations don't need to scrap all their analog radios at once. They can upgrade to DMR in phases, at their own pace and budget.
TDMA dual‑slot technology provides two simultaneous calls in a 12.5kHz channel — spectrum efficiency doubles, delivering the capacity of two traditional repeaters for the cost of one.
Three band versions — VHF (136‑174MHz) and UHF (350‑400MHz / 400‑470MHz) — cover global mainstream professional communication bands, adapting to frequency licensing requirements in different countries and regions.
Ultra‑thin 1U rack‑mount design fits both standard 19‑inch communication racks and wall mounting — adaptable to equipment rooms, utility shafts, field cabinets, and more.
The RJ45 port supports remote diagnosis, monitoring, and secondary development — dramatically reducing maintenance costs.
VHF 50W / UHF 40W output ensures wider coverage, reducing the number of sites required and lowering total cost of ownership.
-30°C to +60°C operating range and intelligent thermal control ensure stable operation in extreme environments.
The M-3500 is produced at Maniron's factory in Hefei, China, delivering professional‑grade quality with competitive pricing and flexible lead times.
The MANIRON M-3500 DMR Digital Repeater is a full‑featured 1U rack‑mount dual‑mode base station built for professional wireless communication scenarios. It doubles spectrum efficiency through TDMA dual‑slot technology, protects existing investments with analog/digital dual‑mode design, breaks geographic boundaries with IP interconnect, and ensures wide coverage with 50W high‑power output.
Whether for industrial parks, mining operations, property management, rail transit, or cross‑region enterprises, the M-3500 delivers reliable, efficient, and scalable core infrastructure for your professional radio communication system.
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