High Power · Low Power Consumption · Dual-Mode Compatibility, DMR858M High-Performance Digital Walkie-Talkie Module

DMR858M Digital Walkie-Talkie Module Product Introduction  

DMR858M is a cost-effective 5W full-function digital walkie-talkie module developed by NiceRF. It is compatible with analog walkie-talkie commonly used in the market and features the DMR Tier II digital walkie-talkie functionality. The module comes with an integrated Moto AMBE++ vocoder. Inside the module, components such as the microcontroller, digital walkie-talkie chip, RF power amplifier, and audio amplifier are all integrated. Customers only need to connect external components like power supplies and speakers to use it as a small digital walkie-talkie with 16 adjustable frequency channels. The module's ultra-compact size also allows for easy and quick embedding into various handheld devices, enhancing the overall performance of end products.
DMR858M strictly uses lead-free technology for production and testing, complying with RoHS and Reach standards。

DMR Technology Advantages and Practical Value

Digital Voice Communication with Clear Noise Resistance
The DMR system uses digital signal modulation combined with a vocoder to digitally encode voice data, maintaining excellent voice clarity even in complex noisy environments.

Dual Time-Slot TDMA Technology to Improve Spectrum Efficiency
It supports two independent voice calls on a single frequency channel, doubling spectrum utilization, saving frequency resources, and making it suitable for networked communication and repeater applications.

Analog/Digital Dual-Mode Compatibility for Easy System Upgrades
DMR supports both digital and analog communication modes, enabling users to retain existing analog equipment while achieving flexible deployment.

Integrated Voice and Data Transmission
Supports voice communication while enabling data transmission such as short messages, remote control, and location information, providing more expansion possibilities for industry applications.

Higher Communication Security and Stability
DMR includes voice encryption, squelch tail elimination, error correction coding, and other mechanisms to enhance communication reliability, security, and privacy.

Low Power Design to Extend Device Battery Life
Equipped with a low-power sleep mode, it is suitable for handheld and wearable devices, significantly reducing current consumption.

Core Advantages of the DMR858M Module

Highly Integrated, Simplified Design
The module integrates key components including MCU, digital walkie-talkie chip, RF power amplifier, and audio amplifier. Users only need to connect a speaker, microphone, and power supply to achieve full digital walkie-talkie functionality.

Built-in Moto AMBE++ Vocoder for Clearer and More Natural Voice
Equipped with a high-performance Moto AMBE++ vocoder, the module offers excellent voice compression and error correction capabilities. It delivers high voice clarity with minimal distortion, maintaining good voice reproduction even in noisy environments. This vocoder is widely used in international high-end walkie-talkie systems and is a critical factor in ensuring voice quality.

Supports DMR Tier II Standard Protocol
Fully compatible with the DMR Tier II protocol, it supports standard digital communication features such as dual time-slot calls, short message transmission, and low-power management, meeting the needs of professional communication scenarios.

Compatible with Common Analog Walkie-Talkie Systems for Easy Integration
The DMR858M module has excellent analog compatibility, allowing direct communication with widely used analog walkie-talkie devices without replacing all terminals. This helps users smoothly migrate from analog to digital and reduces deployment costs.

High Power Output and High Receiver Sensitivity for Long Communication Range
Supports up to 5W transmit power (configurable to 2W low-power mode) combined with a high receiver sensitivity of –120dBm. In open environments, the communication range can reach 7 to 8 kilometers, providing stable signals and strong anti-interference capability.

Multi-Band Support for Deployment in Various Regions
Supports three frequency bands: UHF (400–470 MHz), VHF (134–174 MHz), and 350 MHz band (320–400 MHz), adapting to different industry frequency requirements.

High-Precision TCXO Ensures Frequency Stability
The module features a built-in 0.5ppm high-precision TCXO, guaranteeing frequency stability and enhancing communication reliability and synchronization performance in complex environments.

Compact Packaging for Flexible and Convenient Integration
With a compact design, the module can be easily integrated into space-constrained hardware products such as handheld terminals, helmet systems, industrial equipment, and security devices.

Supports Practical Functions like Short Messaging, Squelch Tail Elimination, and Sleep Mode
Equipped with multiple practical communication features to meet the demands of dispatch systems, patrol devices, and smart security applications for stability, convenience, and low power consumption.

Application Areas
Thanks to its excellent voice quality, system compatibility, and ease of integration, the DMR858M module is widely used in the following scenarios:

Digital Walkie-Talkie Terminals: Core communication module for handheld and portable digital walkie-talkie devices.

Wireless Digital Walkie-Talkie Systems: Embedded deployment in various fixed stations, supporting networking and repeater communication.

Building and Community Security Systems: Used in property communication, security patrols, and other wireless voice dispatch scenarios.

Audio Monitoring Systems: Provides remote voice monitoring and transmission in broadcasting, performances, conferences, and similar environments.

With its high integration, superior audio quality, strong compatibility, long-range capability, and low power consumption, the DMR858M module meets the multiple demands of stability, reliability, and practicality in professional voice communication systems. Whether for handheld terminals, smart de：vices, or industrial communication and security integration, the DMR858M delivers a flexible and efficient digital walkie-talkie solution for users.

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