• Frequentis delivered defence‑grade UTM capability to strengthen safety, security, and resilience in the lower airspace
• Unified “drone air picture” supports integration of crewed and uncrewed aircraft
• Operational validation demonstrates scalable, real‑world UAS enablement

Frequentis was named runner-up in the Safety, Security & Resilience category of the Seamless Skies Awards. The project delivered a pioneering low‑altitude air picture and military uncrewed traffic management (UTM) capability to the German Armed Forces. The award recognises a breakthrough in how defence organisations can safely manage rapidly growing UAS (uncrewed aerial systems) activity while maintaining operational control in complex, dynamic airspace environments.

“This recognition at the Seamless Skies Awards reflects the dedication and expertise of everyone involved in delivering a resilient, defence‑grade UTM capability,” says Peter Skiczuk, Frequentis Vice President Defence. “It demonstrates how Frequentis is helping customers strengthen safety, security, and operational continuity in the lower airspace, ensuring that UAS activity can be integrated safely, predictably, and at scale.”

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• Major contract awarded by the Federal Ministry of Defence (Bundesministerium für Landesverteidigung – BMLV) to modernise military aeronautical radio communications 
• Secure, encrypted voice and data exchange to enhance military air traffic control and airspace surveillance

“The modernisation of the military air traffic radio system is a key element of airspace defence. Only with optimal radio connectivity can missions be successfully conducted and coordinated. This project will safeguard operational readiness, the security of Austrian airspace, and the public safety for years to come,” says Austrian Federal Minister of Defence Klaudia Tanner.

“With this project, we are modernising a core communication infrastructure for military air traffic control. The new system will provide secure and highly available communication well into the future. We are pleased to continue our more than 50-year partnership with the Federal Ministry of Defence,” adds Peter Skiczuk, Senior Vice President Defence at Frequentis.

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• The Memorandum of Intent signed between both parties sets collaboration framework for defence communication programmes supporting localisation objectives in Saudi Arabia
• Agreement aligns C4i’s VOICE C2 system expertise with SAMI L3Harris in-country delivery and support capabilities

Frequentis C4i, as the original equipment manufacturer of the VOICE C2 communication system currently in use by the Royal Saudi Air Force, has signed a Memorandum of Intent (MOI) with SAMI L3Harris Technologies to explore collaboration on defence communication opportunities in the Kingdom of Saudi Arabia.

“This Memorandum of Intent reflects a practical step toward closer cooperation on secure command-and-control communications and local capabilities,” says Darren Gardner, Managing Director at C4i. 

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• Australia Defence Force to utilise C4i’s VOICE C2 multi-domain communications
• Under the contract, C4i is creating advanced, sovereign voice communication systems that integrate with command networks to support secure multi-domain defence operations

Frequentis C4i has been under contract since 2024 to provide cutting-edge multi-domain communication systems for the Australia Defence Force’s (ADF) next-generation AIR6500 Joint Air Battle Management System. C4i’s partnership with Lockheed Martin Australia represents a significant milestone in the company’s ongoing collaboration, building on the success of initial capability demonstrations.

“By integrating our advanced hardware and software solutions, we are enhancing the ability of the military to communicate securely and effectively across all domains. This capability is vital for responding to threats quickly, especially in challenging environments,” said Darren Gardner, Managing Director, Frequentis C4i. 

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• Frequentis modernises the Colombian Air Force’s (FAC) air defence systems and upgrades half of Colombia’s military air traffic control sites
• Enhancing and adapting communication infrastructure to meet the evolving demands of future critical missions

Frequentis has reached a major milestone in enhancing Colombia’s defence capabilities by upgrading the FAC’s iSecCOM communication systems. The modernisation includes updates to the FAC’s air defence systems, along with half of all military air traffic control sites across the country. Colombia’s strategic location, bridging North and South America, makes it a key player in global defence and security.

"Colombia is a reference point in the global defence market," says Peter Skiczuk, Vice President Defence at Frequentis. "By choosing Frequentis solutions, the Colombian Air Force reaffirms its trust in the quality, reliability, and innovation of our critical communication systems. This project marks the next step in our longstanding relationship, where we continue to provide advanced, secure solutions for the future of defence."

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• Frequentis Group is developing an advanced chemical, biological, radiological, and nuclear (CBRN) reconnaissance system for the European Defence Agency
• This is on behalf of selected Ministries of Defence of EU member states and in the context of EDIDP (European Defence Industrial Development Programme) - CBRN-RSS project, co-funded by the European Union
• Sensor and uncrewed systems data will speed up analysis, revolutionising CBRN defence, and cutting response times.

In response to evolving threats, the Frequentis Group has developed an innovative data fusion cell (DFC) to integrate sensor and uncrewed systems data, through its incident crisis management (ICM) technology. The DFC serves as a centralised hub, seamlessly integrating information from various sources including sensors and drones, therefore enabling comprehensive analysis and rapid decision-making. 

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• Accreditation from the US DoD represents a significant vote of confidence in C4i’s ability to safeguard critical communications for worldwide defence organisations
• VOICE C2 demonstrated its capability to provide highest levels of security and reliability for military communications
• Successful completion of cybersecurity and interoperability testing
• Solution is deployed in Air Force and used for Command Posts, Operations Centers, and Air Traffic Control

The Frequentis C4i VOICE C2 communication system has been approved by Defense Information Security (DISA) for listing on the Department of Defense (DoD) information network (DoDIN) approved products list (APL) following recertification by the Joint Interoperability Test Command (JITC). The successful completion of cybersecurity and interoperability testing reaffirms C4i's status as an industry leader in defence communications technology.

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• Nationwide sensor network at 22 locations
• MilRADNET uses proven and innovative technology from Frequentis for the exchange and distribution of flight surveillance data
• The network makes a significant contribution to the safety of German and pan-European airspace

The development of MilRADNET began in 2004 and was conceived as a pioneering solution for the exchange and distribution of military flight surveillance and flight plan data. The new contract represents an important milestone in the long-standing partnership between Bundeswehr and Frequentis.

"MilRADNET's journey reflects our tireless efforts to keep military communication and networking at the highest level. The continuation of the MilRADNET project is a milestone in our long-standing cooperation. It underlines our determination to always provide first-class solutions for the Bundeswehr based on continuous development and innovation," emphasises Constantin von Reden, Managing Director of Frequentis Comsoft GmbH.

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• As a supplier to Lockheed on the Air6500 Project, C4i will provide its VOICE C2 solution ensuring secure communications across air, land, sea, and space
• Project for Royal Australian Airforce (RAAF) aims to enhance security, rapid response, and interoperability of the country’s defence systems
• System will bridge classified and non-classified networks to connect systems, strengthen decision-making, and counter modern threats

AIR6500 is the RAAFs multibillion-dollar plan for an integrated communication network promoting seamless operability and connectivity across sensors, weapons, jets, and warships to protect against threats. Lockheed Martin was selected to lead the project in late August 2023, contracting 10 leading-edge Australian companies to support this mission.

As a supplier to Lockheed, Australian defence company, C4i, a member of the Frequentis Group, will provide its secure VOICE C2 technology. This secure communication system acts as a bridge, linking operators, radios, and telephony across the RAAF's operations. This integration will enhance the RAAF's ability to respond effectively in high-pressure situations.

Melbourne-based critical communications SME, C4i, has been awarded a nationwide voice communication control system (VCCS) contract. Following a successful initial system delivery on behalf of C4i, this contract will expand on what is already one of the largest systems in Asia Pacific.

C4i’s secure VCCS, the VOICE C2 system, offers unparalleled operational flexibility, allowing operators to control any radio – from anywhere – at any time; with the intuitive graphical user interface providing operational access to both local and remote systems, for quicker response times. 

With several hundred controller working positions, working end-to-end, the C4i VCCS will represent one of the largest Voice Over Internet Protocol (VoIP) systems in Asia Pacific and the world.

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