April 12, 2026
Checklist for Deploying 5G in Assembly Lines
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Private 5G networks are transforming industrial operations with fast, reliable, and low-latency connectivity. However, integrating 5G with older systems is challenging due to mismatched protocols, signal interference, and security vulnerabilities. To bridge this gap:
The payoff? Improved efficiency, reduced downtime, and up to 14x ROI within five years. Solutions like Firecell’s private 5G networks simplify this process, offering tools for seamless connection of legacy systems to 5G, ensuring reliability and scalability.
4-Step Process for Integrating 5G with Legacy Industrial Systems
Before diving into 5G deployment, it’s important to take a close look at your legacy systems. Many industrial facilities rely on equipment that has been operating reliably for 15–20 years, often without wireless connectivity in mind. A detailed assessment at this stage helps avoid costly mistakes and ensures your 5G network integrates smoothly with existing infrastructure. This evaluation sets the stage for more focused audits and gap analyses later.
This process often uncovers compatibility issues that aren’t immediately obvious. Legacy equipment frequently uses older protocols like Modbus, OPC DA, or Telnet, which aren’t inherently 5G-compatible. On top of that, industrial environments pose physical challenges – metal structures can cause signal reflections or create "shadow zones" where wireless coverage drops off. Skipping this step could lead to a network that fails to connect key equipment or interferes with existing systems.
"Understanding this full scope, from legacy systems to cutting-edge software stacks, is crucial for crafting a robust and effective defence strategy." – Samantha Kight, Head of Security Industry, GSMA
The financial stakes are high. For example, inefficiencies in automotive facilities alone could result in up to £400 million in lost output over five years. On the flip side, manufacturers who properly evaluate their systems can see a tenfold ROI from cellular Industry 4.0 solutions, while warehouse operators may experience up to a fourteenfold return. The key difference? A thorough evaluation before deployment.
Once you’ve completed your initial evaluation, the next step is to audit your infrastructure in detail. Start by cataloguing all connected assets in your facility. This includes machines, sensors, programmable logic controllers (PLCs), SCADA systems, and other networked equipment. The goal is to map out how each system communicates, identify the protocols in use, and note uptime requirements.
Protocol compatibility tends to be a common problem. Walk through your facility to identify communication standards like Modbus TCP, Profinet, or EtherCAT, as well as older protocols such as OPC DA. Many legacy systems operate at Layer 2 of the network stack, while 5G infrastructure typically functions at Layer 3. Bridging this gap may require protocol translators or gateways. For example, an Ignition gateway can convert OPC DA to OPC UA, enabling centralised, 5G-ready data acquisition.
Security should also be a priority during your audit. Legacy equipment often has vulnerabilities – such as outdated software or insecure management protocols like Telnet – that were less of a concern in air-gapped environments but become significant risks in a wireless setup. Document these weaknesses so you can implement safeguards like Secure Boot and firewalls before the 5G network goes live.
Building on your asset inventory, the next step is to assess the radio frequency (RF) environment to identify potential signal issues. Use tools like ray tracing and walk tests to map wireless behaviour. Industrial sites often feature metal machinery, thick walls, and electromagnetic interference, all of which can impact wireless performance. Your survey should pinpoint shadow zones where signals can’t penetrate, reflection hotspots caused by metal structures, and baseline noise levels that may interfere with 5G transmissions. Additionally, define "no-RF zones" to protect sensitive legacy equipment.
Spectrum analysis is another critical step. Compare your current wireless systems – whether Wi-Fi, LTE, or others – against the requirements for 5G, such as deterministic latency and support for high device density. Conduct electromagnetic compatibility (EMC) testing with control engineers to identify any interference between 5G frequencies and existing operational technology (OT) or SCADA controls. Make sure this testing happens under live load conditions to capture real-world interference patterns.
Finally, protocol mapping can highlight where legacy systems fall short of 5G compatibility. Create a detailed map to align each legacy protocol with a 5G-compatible equivalent. For instance, you might convert Modbus to MQTT or use Layer 2 tunnelling to maintain native industrial protocols like EtherNet/IP. This process often reveals that not every application needs 5G – some may continue to operate effectively on LTE or existing wired connections. Categorise applications based on factors like latency sensitivity, bandwidth needs, reliability, and device density to determine which ones truly require 5G and which can stick with older technologies.
| Audit Category | Methods/Tools | Objective |
|---|---|---|
| Infrastructure | Asset Inventory, PLC/SCADA Mapping | Document all connected and unconnected assets |
| Connectivity | Spectrum Analysis, Ray Tracing | Identify interference and signal shadow zones |
| Protocols | Protocol Mapping (e.g. Modbus to MQTT) | Address the need for gateways or translators |
| Security | Vulnerability Scanning, Inventory Awareness | Detect and mitigate cyber risks |
| Environment | EMI/EMC Testing, Site Walk Tests | Ensure 5G doesn’t disrupt existing OT systems |
Connecting 5G to older industrial systems comes with its own set of challenges. Issues like mismatched protocols, security risks, and latency concerns require tailored approaches, not one-size-fits-all solutions.
Below, we’ll dive into two critical areas: interoperability and security/latency, along with strategies to address them.
Legacy networks rely on various non-IP protocols, while 5G operates on IP. This difference is further complicated by the fact that older systems often use Layer 2 protocols, whereas 5G functions at Layer 3. Bridging these systems requires tools like protocol translators, such as OPC UA. The challenge is compounded by hardware limitations – many older devices rely on proprietary or wired interfaces and lack built-in cellular modems for 5G connectivity. Even with retrofitted wireless modules, some systems demand IRT (Isochronous Real-Time) communication that standard 5G can’t natively support.
One effective fix is implementing OPC UA (Open Platform Communications Unified Architecture). This standardised, IP-based interface connects diverse systems, allowing legacy equipment to integrate with 5G networks. For applications requiring precise, low-latency communication, incorporating Time-Sensitive Networking (TSN) over 5G can ensure the strict timing needed by legacy Ethernet systems.
IIoT edge gateways are another key solution. These devices act as data hubs, collecting information from wired or wireless legacy sources and translating it for the 5G core. For instance, a gateway can use Layer 2 tunnelling to maintain native industrial protocols like EtherNet/IP while leveraging 5G for transmission. Alternatively, adopting the Industrie 4.0 Administration Shell creates a digital profile of legacy assets, enabling unified management over the 5G network.
"By testing interoperability between German and Japanese 5G systems, we are helping build globally compatible industrial networks and overcoming technical and regulatory challenges."
– Dr.-Ing Gustavo P. Cainelli
Next, let’s explore how addressing security vulnerabilities and latency concerns ensures smoother integration.
Integrating legacy systems with 5G introduces modern security and latency challenges. Older industrial equipment often runs outdated software and lacks encryption, leaving it vulnerable when connected to wireless networks. Relying solely on SIM-based authentication isn’t enough – organisations need robust identity management and tailored device orchestration for private cellular networks.
Adopting a unified Zero-Trust framework across IT, OT, and 5G domains is a crucial step. This approach uses continuous verification, micro-segmentation, and dynamic policy enforcement to limit threat movement. Additionally, combining Multi-Access Edge Computing (MEC) with AI-driven analytics supports real-time anomaly detection and automated threat responses at the network edge, protecting critical legacy systems. Secure data exchange protocols like pxGrid further ensure seamless communication between 5G, Wi-Fi, and legacy systems, while maintaining consistent identity management and threat intelligence sharing.
"Traditional IT and OT security stacks – designed for Wi-Fi, Ethernet, or centralised cloud systems – are not enough to protect mission-critical operations running on private cellular."
– TeckNexus
Latency is another major concern. While 5G can deliver latency under 1 millisecond – compared to 60–98 milliseconds on 4G – achieving this in real-world industrial settings requires thoughtful planning. Deploying a 5G Standalone (SA) network with an on-premises core offers the best control and lowest latency, outperforming Non-Standalone (NSA) setups. Keeping workloads and AI/video processing on local MEC nodes near production lines can further reduce latency to sub-10 millisecond levels.
Network slicing is another tool to ensure consistent latency. By creating dedicated virtual networks for critical tasks like control, video, and telemetry, it isolates industrial traffic from general data, maintaining a steady Quality of Service (QoS). To address environmental challenges like metal machinery and electromagnetic interference, conducting RF site surveys with ray tracing and walk tests can pinpoint reflection hotspots and shadow zones before deployment. Additionally, prioritising licensed or shared local spectrum (e.g., bands n77 or n79) over unlicensed bands helps avoid interference from competing signals.
| Feature | Private 5G | Industrial Wi-Fi |
|---|---|---|
| Latency | Deterministic (Sub-10 ms) | "Best effort" (Variable) |
| Spectrum | Licensed/Shared (Managed) | Unmanaged ISM (High interference) |
| Coverage | 3–5× larger per access point | Smaller; limited by obstacles |
| Mobility | Seamless handovers for AGVs | Prone to "sticky client" issues |
| Security | On-prem core; local storage | Often shares public/office airwaves |
Integrating 5G with existing systems can feel like a balancing act, especially when dealing with interoperability and security concerns. However, by following a structured plan, you can transition smoothly from planning to implementation while minimising disruptions.
Start by identifying the most impactful use cases for your business. Focus on applications that promise the highest returns, such as autonomous guided vehicles (AGVs), machine vision systems, or real-time telemetry. Securing the right spectrum – like n77 or n79 – is also crucial to ensure reliability and performance.
Selecting the right architecture is equally important. For instance, deploying a Standalone (SA) 5G core on-premises can provide ultra-low latency (under 10 milliseconds), maintain data sovereignty, and keep operational technology (OT) and information technology (IT) networks separate.
"For mission-critical workloads and slicing, Standalone (SA) is necessary. NSA is fine for quick pilots but limits long-term capability."
– Ivan Romanov, Uctel
Once you’ve set clear goals, the next step is to prepare your infrastructure to meet these priorities.
Begin by installing 5G base stations and antennas. In industrial settings, especially those with heavy machinery, perform detailed surveys to identify areas prone to signal shadows or reflections. Using sectorised or directional antennas can help address these issues effectively.
Legacy systems often rely on older protocols, so integrating 5G gateways with Layer 2 tunnelling is a smart move. This allows you to retain existing industrial protocols, like EtherNet/IP, while benefiting from 5G’s speed and reliability – without the need for expensive hardware overhauls. Also, ensure RF cabling is routed away from power lines and properly grounded to avoid electromagnetic interference.
For real-time processes, deploying Multi-access Edge Computing (MEC) nodes near production lines is critical. This keeps AI processing and control loops local, reducing latency and improving performance.
Once these upgrades are in place, thorough testing is essential to ensure the system works seamlessly.
Start small by piloting the setup on a single production line. This phased approach lets you measure key performance indicators (KPIs) like signal quality (RSRP/SINR), throughput, latency, jitter, packet loss, and handover success rates – all without disrupting full-scale operations.
It’s also vital to conduct electromagnetic compatibility (EMC) tests under real operating conditions. Collaborate with controls engineers to ensure that 5G signals don’t interfere with existing OT systems. Keep your current Wi-Fi or wired networks operational as a backup during the transition, and schedule installation during off-peak hours to minimise production downtime.
Testing tools, such as Firecell’s Orion Labkit, allow you to validate performance and compatibility in a controlled environment before rolling out across the entire facility. Once your setup is proven, expand incrementally while continuously monitoring KPIs to maintain smooth operations.
Firecell delivers comprehensive solutions to integrate modern 5G networks with existing systems, offering businesses a straightforward path to upgrade their infrastructure.
Firecell specialises in creating scalable, ready-to-deploy private 5G networks tailored for industrial environments like manufacturing plants, logistics hubs, ports, and airports. Since merging with Accelleran in February 2026, Firecell has expanded its offerings to include a fully integrated platform. This platform combines a core network, programmable RAN, AI-powered network intelligence, and management tools, all deployable in just weeks rather than months.
One standout feature is the ability to modernise older systems without replacing existing equipment. By using industrial 5G routers and gateways as protocol converters, Firecell bridges older PLCs to newer systems via Ethernet, serial, or fieldbus protocols (e.g., MODBUS to MQTT). This has already been successfully implemented in UK manufacturing pilots, where legacy machines were connected to 5G networks for predictive maintenance using hundreds of vibration sensors.
The platform integrates seamlessly with enterprise LANs using standard DHCP, functioning like a Wi-Fi extension but with significantly better performance. It requires far fewer access points – 5 to 20 times less than Wi-Fi – and emits less radiation: 2 times less than Wi-Fi and 4 times less than personal smartphones. With 99.99% uptime, support for over 100 concurrent devices, and deterministic connectivity through network slicing and Time-Sensitive Networking (TSN), Firecell’s infrastructure is ideal for demanding industrial applications.
Firecell complements its technical solutions with flexible pricing models to suit various deployment needs. For testing and compatibility validation, the Orion Labkit range offers pre-configured environments. The Labkit 40, priced at £10,200 (€11,900) with an annual support fee of £4,800, supports up to 64 devices and can be operational in under 15 minutes. For more demanding scenarios, the Labkit 100, costing £25,650 (€29,900) plus £4,800 annually, delivers speeds of up to 800 Mbps.
For temporary or rapidly expanding sites, the Pegasus Pop-up solution provides portable 5G networks. The Low Power Pop-up starts at £28,200 (€32,900) with an annual support fee of £4,520, while the High Power version, designed for larger areas, costs £34,200 (€39,900) plus £5,480 per year. These solutions have been particularly effective in logistics ports, enabling wireless AGVs over existing Ethernet setups and integrating with MES systems for real-time data exchange, achieving a reliability rate of 99.999%.
For larger, permanent deployments exceeding 10,000m², Firecell offers custom-priced Pegasus Network solutions. These include up to 10 access points and full SLA support. Alternatively, a subscription model is available at £85 per 1,000m² per month (€99), covering installation, maintenance, and management software for single buildings over 10,000m². All pricing is VAT-inclusive for UK customers, ensuring transparency and ease of budgeting.
Once your private 5G network is up and running, keeping a close eye on its performance is key, especially as your site grows. Firecell’s Network Management System simplifies this process with a centralised dashboard – often referred to as a "single pane of glass." This tool allows your IT team to manage multiple sites from one interface, no deep telecom knowledge required. It simplifies complex technology while displaying essential metrics like latency (aiming for under 5 milliseconds for critical applications), throughput, packet loss rates, and network availability.
The system’s AI-powered platform automatically adjusts resources, balancing capacity and energy use as the number of connected devices increases. Designed to handle over 100 devices per area with a 99.99% uptime guarantee (backed by Service Level Agreements), this infrastructure is built for demanding industrial environments. Plus, it requires far fewer access points compared to Wi‑Fi setups.
Routine site surveys ensure that as layouts shift, performance benchmarks are still being met. Features like deterministic connectivity, enabled through network slicing and Quality of Service profiles, prioritise critical applications – such as autonomous guided vehicles – so they continue to operate seamlessly as your operations expand. These strategies not only maintain service quality but also prepare your team for the next stage of integration.
As your network scales, your team’s skills need to grow alongside it. Managing an optimised 5G infrastructure doesn’t necessarily require telecom specialists. Firecell’s approach is all about empowering your existing IT staff, training them to manage tasks like network monitoring, SIM provisioning, and basic troubleshooting on their own.
In 2024, the Department of Electrical adopted Firecell’s 4G & 5G Labkit, and Deputy Head Rafael Gonzalez Ayestaran shared his experience:
"I would definitely recommend the 4G & 5G Labkit… It’s useful, affordable and quick to set up. The support that firecell provides is essential, we had a training session and support with the technical team afterwards".
Training programmes should focus on network interfaces, understanding key metrics like latency and jitter, and managing edge computing components that add less than 5 milliseconds of processing time. For employees transitioning from older communication tools like DECT phones or analogue radios to 5G-enabled devices, hands-on training is crucial. Addressing safety concerns head-on – such as explaining that 5G emits half the radiation of Wi‑Fi and a quarter of that from personal smartphones – can help build trust among staff and unions alike.
Bringing private 5G into your legacy industrial systems can revolutionise how your operations run. This guide has covered how to assess your current infrastructure, tackle interoperability and security challenges, and adopt a phased integration approach – all without discarding your existing equipment. The advantages are hard to ignore: latency as low as 20 milliseconds, a reduction in access points by 5 to 20 times compared to Wi-Fi, and the ability to connect thousands of devices and sensors simultaneously.
Firecell offers turnkey solutions designed to make this transition straightforward. Their network integrates directly into your current LAN setup, improving both security and performance. These solutions allow for gradual upgrades to your equipment, ensuring a secure and seamless process.
The benefits are backed by real-world examples. In an automotive plant scenario with 20 automated forklifts, a Firecell 5G network costing €200,000 in CAPEX saved 0.5 hours of downtime per forklift daily. This resulted in an annual gain of €245,000, paying for itself within just 10 months. Similarly, for a site with 500 connected workers, a €400,000 CAPEX investment delivered €50,000 in monthly operational savings through reduced downtime and better labour efficiency – achieving ROI in only 8 months.
The potential goes further. Private 5G enables predictive maintenance that can cut maintenance costs by up to 30%, while AI-driven insights can boost throughput by 10% to 20%. It also supports wearable sensors for hazard detection and emits half the radiation of Wi-Fi. Firecell’s intuitive management system ensures your existing IT team can oversee network monitoring and troubleshooting without needing specialised telecom expertise.
Transitioning to Industry 4.0 doesn’t mean abandoning what already works. With the right partner and a well-thought-out strategy, you can future-proof your operations while continuing to leverage your current assets. Start with a site survey, set clear objectives, and scale your private 5G integration at a pace that suits your needs. The future of your factory floor is within reach.
No, replacing legacy machines is not typically required. Private 5G networks can work alongside existing systems, improving connectivity and enabling automation without the need for a complete overhaul. This approach lets businesses upgrade their operations while keeping their current infrastructure intact.
To quickly link Modbus or OPC DA systems to 5G networks, industrial gateways or routers with built-in support for these older protocols and 5G connectivity are your best option. Devices such as 5G-enabled IoT gateways serve as protocol translators, enabling smooth data transfer over 5G with minimal setup effort. Make sure the gateway you select is compatible with both legacy protocols and 5G to ensure a hassle-free integration process.
To make sure 5G doesn’t disrupt your PLCs or SCADA systems, prioritise its stability and minimal latency. One way to achieve this is by implementing private 5G networks equipped with solid redundancy, advanced security protocols, and a track record of dependable performance in industrial environments. Additionally, conducting thorough testing in your specific setup is crucial to confirm smooth integration and compatibility.
