Codan HF Encrypt 3590-3591 PLD
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3592 Digital Voice Unit

HF DIGITAL VOICE ENCRYPTION UNIT

The 3592 Digital Voice Unit is an external HF voice encryptor delivering 256-bit AES encryption over Codan second generation TWELP digital voice in a 0.4 kg unit for HF, VHF and UHF transceivers.

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Secure voice should not add complexity or weight to the mission. The 3592 Digital Voice Unit brings AES-256 encryption to digital voice communications in a compact 0.4 kg unit, helping teams protect sensitive traffic across HF, VHF, and UHF networks. Built around Codan second generation TWELP digital voice, it gives operators a practical way to add secure voice capability in the field.

Operational networks often include mixed radio assets. Designed as an external encryption unit, the system supports integration across Codan and compatible third-party transceivers, helping teams add secure digital voice without replacing existing infrastructure. Its compact design makes it suitable for vehicle, base, and deployable communications setups.

Mission-critical voice must remain protected in demanding conditions. Lightweight, compact, and purpose-built for operational use, the unit gives teams a practical way to harden voice communications in the field. Secure encryption, digital voice performance, and multi-band compatibility help maintain clear, protected communications when trust in the link matters most.

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AES-256 ENCRYPTION

High grade 256-bit AES encryption storing up to 256 user configurable keys (export controlled version).

TWELP DIGITAL VOICE

Codan second generation TWELP vocoder at 300, 480, 600, 1200 and 2400 bps with auto-bauding.

MULTI-VENDOR COMPATIBLE

HF, VHF and UHF transceiver compatible; over the air compatible with Codan Sentry-H, Envoy and 2110 families.

COMPACT AND LIGHT

0.4 kg main unit in a 120 W x 50 D x 20 H mm housing for man-portable, vehicular and base station use.

ZEROIZE AND SECURITY

Emergency zeroise from a key combination; administrator password protected applications and key files.

FLEXIBLE CONNECTION

Direct H-250 interface connection or accessory adaptor cables for ICOM IC-F8101, Codan 19way and more.

WIDE DC INPUT

4.5 to 28 V DC input with surge protector, 1.5W max, drawn from the transceiver interface connector.

Product type 3592 external Digital Voice Unit (DVU)
Encryption (export controlled) AES-256 (256 user configurable keys)
Vocoder TWELP
Vocoder rates (export controlled) 300 / 480 / 600 / 1200 / 2400 bps
Vocoder rates (non export controlled) 1200 / 2400 bps
Supported modes Analogue pass-through, Clear DV, Secure DV (export controlled only)
Interface control 5-key interface for volume, encryption key and Secure/Clear status; voice prompts and confirmation beeps
Compatibility HF / VHF / UHF transceiver compatible; over the air with Codan Sentry-H, Envoy and 2110 families
Programming Codan DPS (DVU Programming Software); KMS and KFS for key loading
Part numbers 08-07577-001 (encrypted, AU export controlled); 08-07577-004 (non-encrypted)
Audio interface (output) Baseband audio, unbalanced 390 ohm output, configurable 20 mV to +2 V RMS
Audio interface (input) Unbalanced 1000 ohm audio input, -35 to +20 dBm (not configurable)
EMC compliance CE
Dimensions 120 W x 50 D x 20 H mm
Weight Main unit: 0.4 kg
Colour Black
Supply voltage 4.5 to 28 V DC, 1.5W max, pin-F of transceiver interface connector
Temperature -30 to +60 degrees C operating; -40 to +85 degrees C storage
Environmental Tested to MIL-STD-810G for immersion (1 m / 30 mins), shock, vibration, blowing dust, salt fog, humidity and drop
Handset interface 6-pin U228 connector, compatible with 5 pin style plugs
Transceiver interface 6-pin U229 connector
Computer interface Via transceiver interface connector using Codan programming cable
MISSION OUTCOME

3592 Digital Voice Unit adds AES-256 secure HF voice to virtually any HF, VHF or UHF transceiver, using the same Codan TWELP vocoder and encryption as the Sentry-H, Envoy and 2110 families to close the interoperability gap between fielded networks. A 0.4 kg unit, tested to MIL-STD-810G with emergency zeroise and 256 stored keys, keeps secure voice flexible from manpack to base station. Backed by DTC engineering, a three year warranty and worldwide service, the 3592 Digital Voice Unit secures the net wherever units operate.