Over the years, many companies and institutions have developed security landscapes resembling patchwork quilts. Access control systems, fire and intrusion detection technology, video surveillance systems, and building management systems often come from different manufacturers and have been expanded as needed. However, these systems usually operate in isolation without a common database or consistent logging. What was once practical has become a security and efficiency problem. Separate systems mean double maintenance, complex interface management, and an inability to see the big picture in the control center. Alarm messages are received in parallel applications, and reports must be consolidated manually. This results in organizational and technical efforts that tie up human resources, costing time and money, and increasing risks, especially in critical infrastructures where failures can have far-reaching consequences. The complexity of the security environment is also steadily growing: IoT sensors, IP-based communication, cloud connections, and cybersecurity aspects require a higher degree of technical integration. Modern security is now an IT task and no longer solely the responsibility of building management.

As technical developments advance, the legal and organizational requirements for operators of security-relevant facilities are increasing. The european NIS2 directive and the new german KRITIS umbrella law establish the obligation to provide evidence of resilience, monitoring, and documentation as central tasks. Systems must be able to log activities, document events, and provide audit trails—requirements that many legacy, isolated solutions cannot meet. Geopolitical tensions, hybrid threats, and cyberattacks are also increasing the pressure to act. Attacks on energy suppliers, municipal utilities, and waterworks demonstrate the close link between physical and digital security. Those who fail to think in an integrated manner risk leaving security gaps at the interfaces between IT, OT, and building technology. Therefore, today’s security management means holistically assessing risks, networking systems, and consistently recording data. This is the only way to quickly detect and effectively defend against security incidents (https://gebaeudedigital.de/haus-und-gebaeudeautomation/sicherheitsmanagement-im-gebaeude/).

Rather than replacing all systems, open, hybrid security architectures offer a future-proof solution. NOX SYS allows you to gradually integrate existing systems into a common platform. Access control, video surveillance, and fire and intrusion detection technology can be connected via standard interfaces, as can Internet of Things (IoT) components and building automation systems. At the heart of the system is a central dashboard that consolidates all information. Events, alarms, and statuses are displayed, analyzed, and documented in real time. This gives security managers the transparency they need to respond quickly and control processes effectively. At the same time, documentation is simplified, making it easier to comply with regulatory requirements. NOX SYS’s strength lies in its openness: existing hardware remains usable, and new components can be added modularly. The result is an intelligent security architecture that grows with your needs without system interruptions or high migration costs (https://noxsystems.com/systemoffenes-sicherheitskonzept/).

A key factor in the success of integrated systems is a uniform user interface. Rather than monitoring several software solutions simultaneously, users access all security functions through one interface. This reduces training costs, prevents operating errors, and enables coordinated control. Additionally, operational efficiency improves because maintenance and diagnostics can be performed remotely, significantly reducing service times and operating costs. Predictive maintenance also becomes possible, as malfunctions are detected before they lead to failure. Operators benefit from significantly clearer processes in practice: events are documented in a traceable manner, statuses are displayed centrally, and security processes can be controlled across the board. This form of integration offers enormous advantages for complex buildings or distributed locations because it combines scalability and clarity.

NOX SYS stands for both integration and proven quality. Our systems are certified according to EN 50131 Grade 3 and VdS Class C, which are the highest standards for intrusion detection technology and tamper protection. These certifications make the systems suitable for demanding applications in banks, industrial facilities, museums, and critical infrastructures. Additionally, NOX SYS impresses with its high reliability. Local controls ensure that security-related functions remain operational even during connection interruptions. At the same time, access via secure IP networks ensures convenient remote maintenance and diagnostics, a decisive advantage for large, distributed systems. Thanks to its modular architecture, NOX SYS can be configured individually: from access control and video to complex alarm management systems. Each system can be integrated and expanded individually as needed.

Practical examples demonstrate that operators with open systems, such as NOX SYS, can reduce costs in the long term while improving the professionalism of their security organization. Rather than maintaining several isolated solutions, a uniform platform is used that encompasses all operations. This saves resources and strengthens KRITIS security because alarms, logs, and statuses can be recorded and checked centrally. It also increases flexibility. New locations or parts of buildings can be seamlessly connected. User rights can be defined individually. Emergency plans can be mapped directly in the system. Security technology grows with operational requirements without losing existing infrastructure. The future of building security clearly lies in interoperability, transparency, and adaptability.

Few terms are used as frequently – or interpreted as differently – in the security market as ‘system openness’. But what does it really mean when real-world projects begin, public tenders demand integration and five systems suddenly need to communicate with each other?

We spoke to Antoine Evertze, Product Manager at ARAS Security Netherlands and long-standing NOX SYSTEMS partner, about this very issue. The result is a candid discussion about what true integration looks like, where the pitfalls lie, and why you don’t need to integrate everything — just the right things.

Antoine, why is system openness becoming more important in today’s security projects?

Antoine Evertze: Openness isn’t just becoming more important – it’s becoming the standard. Buildings are getting smarter, users are becoming more digital, and IT environments are becoming more complex. No system operates in isolation anymore, whether it’s access control, video surveillance, human resources or fire safety – everything needs to communicate. Not someday, but in real time and in a controllable and auditable way.

To stay relevant, a system needs to fulfil two criteria. First, it must provide a well-documented API with practical use cases, not just abstract documentation. Second, it must be able to adapt flexibly to changing environments using standardised protocols such as OSDP(v2) for access control, ESPA or Modbus, through custom connectors such as SQL or with an API.

We are seeing more and more that customers aren’t buying features anymore – they’re buying integration capability. This determines whether a system can be scaled up for real-world projects or whether it will fail at the interface.

In which projects does NOX really make a difference?

Antoine Evertze: Whenever intrusion and access control need to be unified within a single system, the need for simplicity and consistency becomes obvious – especially in the public sector. No one wants to operate five different systems with five separate interfaces anymore. In a recent government project, we supported the implementation of a solution that not only combined access control and intrusion detection, but also offered a modular, scalable architecture with seamless integrations for video management, elevator systems, and parking management – all controlled from a single platform.
In scenarios like this, fragmented solutions simply aren’t an option.

Which systems do you consider essential for integration today?

Antoine Evertze: In my experience, three areas tend to feature in almost every project: video surveillance, fire alarm systems and identity/user management. When it comes to video, customers expect access and intrusion events to be automatically linked with camera footage. For fire protection, standardised interfaces for evacuation and alert forwarding are essential. When it comes to user management, it is essential that roles, permissions and validity periods can be synchronised from existing systems, such as HR or credential platforms. In short, systems that identify people, track movement or handle critical events must be able to communicate with each other reliably.

So, what is the difference between ‘connecting a system’ and ‘truly integrating it’?

Antoine Evertze: When integration is done right, users don’t even notice it’s happening. Processes run logically, automatically and consistently. No one has to think about which interface to use – it just works. If I have to manually extract or copy data, that’s not integration; that’s extra work. True integration reduces complexity. It doesn’t create new layers.

Thank you, Antoine, for your clear view on what openness really means.