Superior Audio Clarity Explained
Clear as Face-to-Face, Even Miles Away
AMBE+2™
Motorola-Grade Digital Vocoder
Crystal-Clear Audio, Optimized for DMR
- ✔ Motorola-Equivalent Voice Coding – Industry-leading AMBE+2™ algorithm
- ✔ Enhanced Clarity – 20% better noise rejection vs standard codecs
- ✔ DMR Optimized – Perfectly balanced voice quality & bandwidth efficiency
AMBE+2™
Motorola-Grade Digital Vocoder
Crystal-Clear Audio, Optimized for DMR
- ✔ Motorola-Equivalent Voice Coding – Industry-leading AMBE+2™ algorithm
- ✔ Enhanced Clarity – 20% better noise rejection vs standard codecs
- ✔ DMR Optimized – Perfectly balanced voice quality & bandwidth efficiency
Digital Radio Zero Clipping
Digital Radio: Zero Clipping, Zero Loss
- ✔ Zero Clipping - Perfect signal preservation
- ✔ Full Frequency Range - Crystal-clear highs & powerful lows
- ✔ True-to-Life Audio - Exceptional voice reproduction
- ✔ Pinpoint Clarity - Every word comes through distinctly
Analog Radio: Clipping & Signal Loss
- ✔ Severe Clipping - Distorted signal peaks
- ✔ Compressed Range - Muffled highs & weak lows
- ✔ Mechanical Sound - Artificial voice quality
- ✔ Blurred Details - Critical audio information lost
Triple-Layer Fault Tolerance Architecture
Physical Layer: AMBE+2™ Vocoder Dynamic Noise Reduction
- ✔ Patented voice compression algorithm
- ✔ Real-time background noise suppression
- ✔ Adaptive bitrate adjustment (2.4kbps/4.8kbps)
Data Link Layer: TDMA Slot Auto-Retransmission
- ✔ Dual-slot time division multiplexing
- ✔ Packet loss detection & instant recovery
- ✔ <200ms retransmission latency
Application Layer: CRC + Voice Prediction Compensation
- ✔ 16-bit cyclic redundancy check
- ✔ Erased frame reconstruction technology
- ✔ Context-aware speech pattern prediction
4FSK Modulation
DMR Radios Deliver 3x Better Multipath Resistance Than Analog FM.
Mission-Critical Clarity for Demanding Environments.
In metro tunnel environments, 4FSK reduces handover failure rate from 12% (analog systems) to just 4%
In mountainous terrain with strong reflections, increases communication success rate from 68% → 95%
In multipath-rich metal structures, achieves BER improvement from 10⁻² → 10⁻⁵
Comprehensive Security Protection
Security Built In, Not Bolted On
End-to-End Encrypted Voice Protection
- ✔ Transmit End: Microphone audio is encrypted at source
- ✔ Transmission: RF signals remain fully encrypted over-the-air (anti-eavesdropping)
- ✔ Receive End: Only authorized devices can decrypt (bound to Radio ID)
Secure Authentication & Anti-Spoofing
- ✔ Every DMR radio embeds a globally unique 7-digit ID (per ETSI TS 102 361-3)
- ✔ Unauthorized devices automatically rejected
AES-256
Advanced Encryption Standard
- ✔ 256-bit key strength (NSA-approved for Top Secret communications)
- ✔ 3.4×10³⁸ possible combinations - virtually unbreakable
AES-256
Advanced Encryption Standard
- ✔ 256-bit key strength (NSA-approved for Top Secret communications)
- ✔ 3.4×10³⁸ possible combinations - virtually unbreakable
Radio ID Access Control
No ID, No Entry: DMR's Digital Gatekeeper
DMR Radio Security Management
- ✔ Unique Radio ID Binding with User Privileges, Enforces role-based communication hierarchies.
- ✔ Automatic Rogue ID Detection & Blocking, System instantly terminates sessions.
- ✔ Anti-Spoofing Protection, Prevents ID cloning and replay attacks with 99.97% accuracy .
Remote Kill
Switch for Lost/Stolen Units
DMR Radio Security Management
- ✔ Remotely disable lost/stolen radios via over-the-air command
- ✔ Brick unauthorized devices within 30 seconds of activation
Remote Kill
Switch for Lost/Stolen Units
DMR Radio Security Management
- ✔ Remotely disable lost/stolen radios via over-the-air command
- ✔ Brick unauthorized devices within 30 seconds of activation
Remote Kill
Switch for Lost/Stolen Units
DMR Radio Security Management
- ✔ Remotely disable lost/stolen radios via over-the-air command
- ✔ Brick unauthorized devices within 30 seconds of activation
One Press = Instant Help
Emergency alert channel - one-touch direct access
Dedicated hardware button (orange), Instant Emergency Activation
- ✔ One-Touch Redirect – Instantly switches to pre-programmed emergency channel
- ✔ Priority Access – Bypasses regular traffic with system-wide alert broadcast
- ✔ Flexible Configuration – Assign any channel as emergency backup
One Press = Instant Help
Emergency alert channel - one-touch direct access
Dedicated hardware button (orange), Instant Emergency Activation
- ✔ One-Touch Redirect – Instantly switches to pre-programmed emergency channel
- ✔ Priority Access – Bypasses regular traffic with system-wide alert broadcast
- ✔ Flexible Configuration – Assign any channel as emergency backup
Feature Highlights
Twice the Channels, Half the Cost
6.25kHz Ultra-Narrowband
DMR’s 6.25kHz equivalent bandwidth doubles channel capacity within the same spectrum, reducing licensing fees while meeting high-density communication needs (e.g., airports, large events).
Unlimited Channels, Unlimited Flexibility
Up to 3000 Channels
Supports 64/256/3000+ programmable channels, enabling seamless coordination for small teams to city-wide operations.
Contact List & Caller ID
Know Who’s Calling Before You Answer
Store 50000+ contacts with name/ID display, ensuring efficient communication and reducing missed critical calls.
Real-Time Location, Smarter Decisions
GPS Tracking & Location Sharing
Live GPS coordinates (≤5m accuracy) and team location sharing optimize dispatch and emergency response.
Right Message, Right People, Right Now
Call Hierarchy
Role-based permissions (e.g., admin → team leader → member) ensure secure and efficient communication flow.
Longer Life, Fewer Charges
Digital Power Efficiency
TDMA technology reduces power consumption by 40%, doubling battery life compared to analog mode.
No Response? Auto-Alert!
Lone Worker Safety Alert
If no activity is detected for a set time (e.g., 10 minutes), the radio automatically triggers an SOS with GPS location.
Built for the Toughest Conditions
IP67 Water & Dust Resistance
Survives 1m underwater for 30 minutes and meets MIL-STD-810H standards for extreme environments.
Danger Ahead? Be the First to Know
NOAA Weather Alerts
Receives NOAA storm warnings with location coding, critical for outdoor teams.
Wireless Freedom, Uncompromised Security
Bluetooth Support
Pair with Bluetooth 5.0 headsets/mics for hands-free operation in industrial or tactical scenarios.
Upgrade Without Replacing
Digital/Analog Dual Mode
Auto-switches between analog and digital, ensuring compatibility with legacy systems while transitioning.
One Radio, Multiple Roles
Multi-Profile Identity Switching
Switch between pre-programmed profiles (e.g., Manager → Dad) with customized contacts and permissions.
DMR: Smarter, Safer, Stronger
Specifications
Retevis HD2
Retevis NR30D
Retevis P1
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