Industrial Wi-Fi Access Point with 4G Backhaul: How It Works and Benefits
In factories, warehouses, construction sites, and industrial facilities, deploying a traditional Wi-Fi network requires Ethernet backbone cabling to each access point—an infrastructure that is costly and time-consuming to deploy. Eziwan’s industrial 4G Wi-Fi router eliminates this constraint: each Wi-Fi access point uses its own 4G connection as a backhaul to the Internet and the cloud.
This WiFi over 4G backhaul architecture offers several major advantages:
- Rapid deployment: A 4G Wi-Fi access point can be installed in 30 minutes, whereas a wired Wi-Fi access point requires a full day of cabling
- Flexibility: Move or add access points without touching the network cabling
- Resilience: Each access point is self-contained—if one fails, it doesn’t affect the others
- Ideal for temporary sites: construction sites, seasonal facilities, temporary factory expansions
IEEE 802.11 b/g/n Wi-Fi Standard: Performance in Industrial Environments
The Eziwan 4G WiFi router uses the IEEE 802.11 b/g/n standard on the 2.4 GHz band, with the following features:
| Standard | Theoretical Maximum Data Rate | Typical Actual Data Rate | Indoor Range |
|---|---|---|---|
| 802.11b | 11 Mbps | 4–5 Mbps | 35 m |
| 802.11g | 54 Mbps | 20–25 Mbps | 38 m |
| 802.11n (HT40) | 300 Mbps | 80–150 Mbps | 70 m |
In industrial environments (concrete walls, steel structures), reduce the range by 30 to 50% compared to residential indoor values. The 2.4 GHz band is preferred because it penetrates obstacles better than the 5 GHz band—a key advantage in factories with a high density of machinery.
For industrial IoT applications (sensors, AGVs, monitoring tablets), the 802.11n data rate is more than sufficient.
Multiple SSIDs and OT/IT Segregation: Best Practices
Industrial cybersecurity standards (IEC 62443, NIST SP 800-82) recommend separating operational technology (OT) networks from information technology (IT) networks. The Eziwan 4G WiFi router enables this separation through multiple SSIDs and VLANs:
SSID OT (Factory_OT):
- Associated with VLAN 10 (control network)
- WPA2/WPA3 Personal with a shared key
- Access limited to the Eziwan cloud (monitoring) — no general Internet access
- Connected devices: AGVs, WiFi carts, IoT sensors, portable HMIs
IT SSID (Factory_IT):
- Associated with VLAN 20 (IT network)
- WPA2/WPA3 Enterprise with RADIUS authentication
- Full Internet access via 4G
- Connected devices: tablets, smartphones, technicians’ laptops
Guest SSID (Factory_Guest) (optional):
- Isolated VLAN, Internet access only (no access to OT/IT VLANs)
- For visitors and service providers
Wi-Fi Security in Industrial Environments: WPA3 and 802.1X
The Eziwan 4G WiFi router supports the latest WiFi security standards:
WPA3 Personal (SAE): Replaces WPA2 PSK with a Dragonfly key exchange that is resistant to offline dictionary attacks. Recommended for SSIDs with a shared key (OT, IoT).
WPA3 Enterprise (802.1X): Each device or user authenticates using its own certificate or credentials. The Eziwan router supports EAP-TLS (certificate), EAP-PEAP (username/password), and EAP-TTLS. Integration with Active Directory via the RADIUS protocol.
Management Frame Protection (802.11w): Protection against Wi-Fi deauthentication attacks (deauth flooding) that can disconnect critical industrial equipment.
Use Case: Industrial Wi-Fi Without a Network Infrastructure
Warehouses and Logistics: Wi-Fi connectivity for forklifts, barcode scanners, and tablets in a warehouse with no existing network cabling. Each area of the warehouse has its own Eziwan 4G Wi-Fi access point, which can be installed in less than an hour.
Maintenance Workshops: Wi-Fi for technicians using diagnostic tablets, with no network cabling in the maintenance halls. The 4G Wi-Fi router is powered by an existing 24V outlet and provides coverage throughout the entire workshop.
Construction Sites and Temporary Installations: See the page dedicated to 4G connectivity for industrial construction sites. Set up Wi-Fi in 30 minutes with a pre-programmed SIM card—no civil engineering work required.
Factory expansions: When expanding an industrial building, Eziwan 4G Wi-Fi allows you to immediately connect the new spaces to the monitoring network, without having to wait for the final network cabling (which can take months).
Centralized Management of 4G Wi-Fi Access Points via the Eziwan Portal
Each Eziwan 4G WiFi router is managed through the Eziwan cloud portal just like any other device in the fleet:
- Unified Configuration: Deploy the same SSID/VLAN/security configuration to all APs with a single click
- RF Monitoring: View Wi-Fi signal quality, the number of connected clients, and data volume per AP
- OTA Updates: Wi-Fi and 4G firmware updated simultaneously across the entire fleet
- Alerts: Immediate notification if an AP loses its 4G or Wi-Fi connection
- Connection History: Logs of connected Wi-Fi devices for security audits