OT Network Security Services

Secure OT Network Design and Construction Services

Yokogawa provides end-to-end support for secure OT network design and implementation—ranging from on-premise factory networks to cloud environments such as AWS (*1) and Microsoft Azure (*2). We tailor each solution to meet customer-specific requirements for functionality, security, availability, maintainability, and cost, delivering the optimal network architecture for IT/OT convergence.

*1) AWS and Amazon Web Services are trademarks of Amazon.com, Inc. or its affiliates.
*2) Microsoft Azure is a trademark of Microsoft Corporation or its affiliates.

 

Infrastructure Development

 

 

Challenges in IT-OT Integration

 

 

Why Is IT-OT Collaboration So Challenging?
One key reason is that IT and OT have evolved independently, each with its own culture and priorities. For example, their approaches to security differ—each focuses on protecting different assets and outcomes.

 

Example1: Network Design Coordination Challenges
IT and OT networks have traditionally been managed separately, each based on different requirements. Integrating them requires careful design alignment, which can be time-consuming and may result in rework or design rollbacks.

Example 2: Misaligned Security Priorities
IT security focuses on protecting information, while OT security prioritizes the continuity and safety of physical operations. These differing goals mean a unified security approach isn’t always feasible—measures must be tailored to meet the unique needs of each domain.

Example 3: Ambiguity in System Management Responsibilities
Integrating IT and OT systems blurs traditional lines of responsibility. It’s no longer effective to divide management roles solely based on system location or function. Clear communication, discussion, and mutual agreement between departments are essential.

 

Solving IT-OT Integration Challenges

Our service is designed to address the real-world challenges of digital transformation (DX). Acting as a trusted partner, we support DX leaders by offering practical solutions grounded in deep understanding of both IT and OT environments.

We provide:

• Mediation and coordination between IT and OT departments
• On-site assessments to clarify the current network and system conditions
• Tailored proposals for network architecture and security aligned with the customer’s environment
• One-stop support for infrastructure development essential to advancing DX

 

Examples of Tailored Solutions

We deliver customized solutions based on specific customer requirements, including:

• Design and construction of secure networks for control systems (DCS, PLC, SCADA)
• Secure network design for manufacturing execution systems (MES)
• Secure cloud connectivity (AWS1, Azure2, etc.)
• WAN design and implementation for multi-site connectivity
• Wireless network design and deployment
• Secure remote access setup
• Network segmentation using firewalls and L2/L3 switches
• Firewall and UTM implementation
• Network IDS/IPS deployment
• One-way gateway (data diode) implementation
• Authentication infrastructure setup (e.g., Active Directory*3)
• Network monitoring system integration (e.g., Zabbix*4)
• Log management system deployment
• Patch management system implementation
• Centralized antivirus software management

*1) AWS and Amazon Web Services are trademarks of Amazon.com, Inc. or its affiliates.
*2) Microsoft Azure is a trademark of Microsoft Corporation or its affiliates.
*3) Active Directory is a trademark of Microsoft Corporation or its affiliates.
*4) Zabbix is a trademark of Zabbix LLC.

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Why Upgrade Your Communication Infrastructure?

Many facilities still rely on a combination of in-house communication systems, private branch exchanges (PBX), or simple wireless paging systems. These solutions, while once effective, are no longer sufficient in the era of Industrial Internet of Things (IIoT) and IT/OT integration.

Today’s field communication needs go far beyond simple voice calls. To respond effectively in dynamic industrial environments, communication systems must handle high-quality voice, real-time video, and data exchange—all while maintaining robust security and reliability.

Now is the ideal time to consolidate your communication infrastructure. By transitioning to a unified, IP-based system, you can reduce overall equipment and operational costs while greatly enhancing communication capabilities.

 

Our Solution: High-Performance, IP-Based Communication Systems

Yokogawa supports your digital transformation journey by delivering advanced communication systems designed for industrial environments. Our solutions enable seamless voice, video, and data communication between field operators and related departments—enhancing situational awareness, response times, and collaboration.

Key Features and Benefits

• Integrated Communication: Combine voice calls, video conferencing, messaging, and data sharing in one platform.
• Secure and Reliable: Built to meet the demands of industrial environments, with robust security features.
• Future-Ready Infrastructure: Complies with the latest wireless communication regulations and eliminates dependency on obsolete systems like PHS.
• Cost Efficiency: Reduces total cost of ownership through system consolidation and modern infrastructure.

 

Regulatory Considerations

The use of analog radio systems for wireless paging will officially end on November 30, 2024. While transitional measures exist, facilities using in-house PHS must prepare to comply with the new spurious emission standards. This transition will require replacement of PHS base stations and all related devices.

Rather than investing in outdated technologies, OT companies have an opportunity to reassess and modernize your entire communication infrastructure. Yokogawa can help you design and implement a future-ready communication system that aligns with regulatory requirements and operational goals.

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From a management perspective, enhanced on-site communication is key to visualizing operations, stabilizing product quality, and accelerating planning cycles—all while driving overall optimization.

Modern wireless communication infrastructure now supports not just high-speed voice calls but also secure, real-time video sharing and the transmission of large volumes of data across teams and departments. Upgrading your plant's wireless infrastructure can significantly improve communication quality and productivity.

Yokogawa delivers secure, high-performance wireless network solutions tailored to the needs of industrial operations, helping you enable seamless communication between your control systems and field personnel.

 

Trends in Wireless Communication Infrastructure

 

Wireless Communication Use Cases

Voice Communication – Replacing Legacy PHS or Paging Systems

• Internal and external voice calls
• Group calls and paging functions

Field-to-Control Room Feedback and Monitoring

• Monitor control screens (e.g., CENTUM) during loop checks or diagnostics
• Share real-time images and video feeds from the field
• Enable chat-based communication between teams
• Digitize patrol inspections (e.g., using Yokogawa Field Assistant solutions)
• Access file servers for manuals and technical documents

Safety and Security Applications

• Track worker locations in real time
• Monitor evacuation status during emergencies or safety drills
• Manage the positions of mobile devices and equipment on-site

 

Ready to Modernize Your On-Site Communications?

Yokogawa’s OT wireless infrastructure services help you move beyond legacy systems, reduce communication delays, and increase situational awareness—paving the way for smarter, safer, and more responsive operations.

Let us help you design a future-ready wireless network that meets your goals for connectivity, productivity, and digital transformation.