Flexible and cost-effective next generation ATC communications

CERTIUM® VCS-4G is a quad-redundant, IP based voice communications system that perfectly integrates with the entire CERTIUM® portfolio to ensure safe, secure and efficient airspace operations. It combines a state-of-the-art, flexible and resilient purely IP based architecture with strong security mechanisms. Its flexibility makes it suitable for both a small tower and a nationwide system with multiple area control centres and hundreds of controller working positions. With its advanced functionalities, CERTIUM® VCS-4G can support a remote digital tower system or connect Area Control Centers to a virtual center, quickly and flexibly transferring responsibilities between centers and even countries.

Deep dive into CERTIUM® VCS
Deep dive into the CERTIUM® VCS

See for yourself the components, system overview and features of the most widely deployed full-IP VCS solution on the market in a 10 minutes webinar abstract.

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Product brochure

Learn more about the voice communications system CERTIUM® VCS, the heart of all air traffic control operations.

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CERTIUM® VCS architecture
Full-IP Architecture

Understand the decentralized high redundant architecture of the full IP CERTIUM® VCS system providing maximum availability and flexibility for all customer needs.

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ATC customers around the world trust our proven VCS solutions.

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CERTIUM® VCS components

CERTIUM® VCS-4G consists of two types of controller working positions that act as an interface to the controller telephony and radio server to manage voice traffic. The system can be connected to legacy systems via various gateways from the CERTIUM® GATEWAYS portfolio. The entire system is centrally managed via the VCMS system as part of CERTIUM® MANAGEMENT.

R&S®GB5400 Standard Controller Working Position

The R&S®GB5400 Standard CWP (sCWP) is a flexible unit that acts as an interface to the controller. Its modular design makes it the perfect solution for system installations requiring the entire spectrum of ATC features. The sCWP is a 19" device with numerous audio input and output devices and monitors that can be flexibly integrated into the controller's desk.

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R&S®GB5450 Compact Controller Working Position

The R&S®GB5450 Compact CWP (cCWP) is a small form factor CWP that provides an ATC feature set almost identical to the R&S®GB5400 Standard CWP with a slightly reduced call handling capacity. Its compact design makes it the perfect solution for system installations with space constraints – without compromising features. Installed at the controller's desk, it provides a HMI for air-ground and ground-ground communications and connectors for audio input/output devices with volume controls. It combines a 7" touchscreen, processing unit, audio unit and speaker in a compact chassis.

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R&S®VS5400 Telephony Server

The R&S®VS5400 Telephony Server acts as an interface between the VCS environment and standard telephony systems. It enables communications between the CWPs and IP phones and other interconnected SIP trunks. The server also provides media conference resources between CWPs, IP phones and legacy users connected via CERTIUM® GATEWAYS.

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R&S®RS5400 Radio Server

The R&S®RS5400 Radio Server platform is used for network deployments covering a large number of radios (transmitters, receivers and transceivers) at airports and nationwide installations with several remote radio sites. The platform's main functionality is to aggregate and split voice streams to/from radios to optimize bandwidth consumption on links to remote radio sites. The server effectively acts as a proxy for audio streams, achieving significant bandwidth reduction on the network link between a central location and remote radio sites. The R&S®RS5400 can also perform centralized processing of air-ground signals with e.g. BSS, allowing all CWPs to have the same information.

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R&S®DB5400 VCMS Server

The R&S®DB5400 VCMS Server platform stores the configurations of all CERTIUM® VCS-4G system components. It allows the configuration of radio, telephone and intercom communications, user access, operational roles and missions. The VCMS application is accessed via a password protected web frontend. The radio remote control and monitoring system for monitoring the status of Rohde & Schwarz radios and changing frequencies can be co-located on the R&S®DB5400 platform.

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Key features

Taking all advantages of full IP technology CERTIUM®VCS accomodates market unique features while keeping the security and easy of use on very high level. Learn about the key VCS features features.

CERTIUM® VCS: Quad redundancy
Quad redundancy

Learn about market unique quad redundant availability solution of a CERTIUM® VCS system providing the maximum operational security even for the case of large scale natural disasters such as earthquake, flooding or pandemic disease.

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Intuitive GUI

Intuitive graphical user interface on the controller working position is important for effective work of air traffic controllers. Convince yourself.

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Further CERTIUM® portfolio


Reliable software defined radios for air traffic control, including the brand-new R&S®Series5200 featuring an innovative security-by-design architecture.

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Increases situational awareness by highlighting the communicating aircraft on the radar screen based on state-of-the art direction finder and geo-referencing technology.

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Ensure regulatory compliance with market-leading test and measurement solutions for VoIP networks, radios, navigation, radar and satellites.

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Seamless integration of legacy applications into IP infrastructure enabling phased migration scenarios.

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Delay-free network encryption, ATC session border controller and high availability network components ensure the reliability and security of ATC networks.

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Easy-to-use centralized management of VCS and radios provides real-time view of system and enables smooth network operation.

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70 service centers worldwide provide customers with support close by, 24 hours a day, 7 days a week, ensuring smooth operations for many years.

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