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FR-72 Field Repeater

FR 72

FR-72 Field Repeater

Device Designation: FR 72

Manufacturer: LangSec Dynamics

Catalog Reference: Equipment Catalog, Item No. FR-72-118

Device Overview

The FR 72 is a rugged, multi-band, stealth-grade signal repeater built to maintain secure communication in signal-denied or RF-hostile environments. Disguised as degraded field equipment, it supports both UHF and VHF primary bands, along with optional connectivity via 900 MHz ISM, 1.2 GHz burst, and 2.4 GHz encrypted pairing. With dynamic beamforming, adaptive mesh networking, and hardened stealth design, the FR 72 delivers scalable communication coverage—even underground or behind rubble—without compromising security or position.

Core Capabilities

Multi-Band Signal Repeate – Supports both UHF (400–512 MHz) and VHF (136–174 MHz) bands – Automatically selects band based on terrain, range, and interference – Optimized for seamless switching between channels during live operations Beamforming Antenna Array – Internal directional antenna cluster with phase-control algorithms – Electromagnetically steers broadcast and receive fields to minimize signal loss – Enables enhanced signal focus, reduced RF spread, and lower detection risk Spread Spectrum and Frequency Agility – Full support for spread spectrum frequency hopping – Dynamic channel reassignment under interference or jamming conditions – Redundant routing ensures consistent mesh signal uptime Stealth Physical Profile – Camouflaged as outdated military comms gear – No external lights, branding, or reflective surfaces – Enclosure features worn paint, dummy ports, and false venting for environmental disguise

Transmission & Communication

  • Frequency Bands:

– Primary:

  • UHF: 400–512 MHz
  • VHF: 136–174 MHz

– Optional / Secondary (device-dependent):

  • ISM 902–928 MHz for fallback mesh communication
  • 1.2 GHz (L-band) for line-of-sight burst transmission
  • 2.4 GHz for short-range encrypted pairing or emergency device sync (disabled by default)
  • Protocols Supported:

– Encrypted mesh relay

– Direct digital repeater mode

– Audio and data pass-through

– Spread spectrum and channel hopping

  • Device Compatibility:

– Supports a wide range of tactical, linguistic, and surveillance devices within the LangSec ecosystem

– Interoperable with multi-node field sensors, translators, and audio relays

  • Range:

– Direct: 5–15 miles line-of-sight

– Mesh-Chained: Up to 50 miles with relay units

  • Encryption:

– AES-256 for transmission

– 4096-bit RSA for handshake

– Temporary key cycling (every 12 minutes)

– Tamper-response wipe and de-authentication protocol

Physical Specs

  • Dimensions: 120mm x 70mm x 30mm
  • Weight: 200 grams (7.1 ounces)
  • Material: Hardened matte polymer housing with thermal shielding
  • Ingress Protection: IP68—fully waterproof, shock-resistant, and dust-sealed
  • Operating Temperature: –20°C to 55°C

Power & Runtime

  • Battery: Internal LiFePO₄, field-replaceable
  • Runtime:

– Mesh Mode Only: Up to 5 days

– Audio Relay Mode: Up to 3 days

– Combined Operation: Up to 48 hours under mixed load

  • Charging:

– USB-C (sealed field access)

– Magnetic dock

– 4-pin proprietary connector (LEX-4 compatible)

  • Power Management:

– Sleep cycles between hops

– Passive mode until activated by signal or timer

– Manual override toggle under sealed cover

Deployment Notes

  • Used successfully during The Last Echo mission
  • Can be concealed near metal doors, conduit, bunkers, or debris piles
  • Compatible with LEX-series translators, ARC-9 audio relays, and other mesh-compliant gear
  • Built for low-detection zones—emissions are burst-mode only with intelligent routing

Deployment History