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Unmanaged switches Layer 2 managed switches Layer 3 managed switches IEC 61850-3 switches IEC 62443-4-2 SL2 switches EN 50155 switches PoE switches Rackmount switches

Ethernet extenders

Managed extenders Point-to-point extenders

Industrial routers & gateways

Ethernet routing switches Cellular routers & gateways DSL routers

Wireless networking devices

WLAN access points mmWave nodes

Modular computing platform

RCP-1000 Series

Media converters

Serial converters & repeaters Ethernet media converters Fibre optic modems

Modems

Fibre optic modems

Accessories

Power supplies SFP transceivers M12 USB backup device Network cables & antennas

Product lines & brands

CyBox Series Ibex Series Lynx Series Merlin Series Oryx Series RCP Series Redfox Series SandCat Series Viper Series Wolverine Series

All Westermo products

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Our services

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Essential Enhanced Enterprise

Service agreements for cellular networks

Essential- Cellular Enhanced - Cellular Enterprise - Cellular

Technical support services Westermo Academy Activator

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Rail

Applications Railway cybersecurity solutions FRMCS - 5G Successor to GSM-R network-rail-approved Rail Products Quality Projects and References Blu Wireless Partnership

Energy

Dynamic Grid Solutions Primary Substation Communication Renewable Power Generation Smart Grid Communications Substation Automation

Defence

Maritime and offshore

DNV approved products Success stories

Water and wastewater

Solutions

WeOS

Download WeOS WeOS firmware history GNS3 Solutions WeOS user guides

WeConfig

Download WeConfig

WeConnect Activator Industrial cybersecurity

Industrial remote access

Cybersecurity Industrial applications Legacy modem replacement Protocol conversion Utility applications Zero touch networks

Cellular communication

450 MHz spectrum for utilities Private cellular networks

Extending Ethernet

Products SHDSL cable testing Solutions

Support

Product support Contact support Industrial networking blog

Product security

Cyber Resilience Act (CRA) Vulnerability management Report a vulnerability Security advisories

Westermo Academy

Technical support services

On-site support services Commissioning services Troubleshooting services Network security services Network optimization services Network design services

Application notes Product life cycle Repair and warranty Legacy software tools

Contact

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About us

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Solutions / WeOS / Download WeOS / WeOS 4

Download the latest WeOS 4 firmware. Complete the form below to get your download link, with immediate access after submitting.

Latest version: WeOS 4.35.1
Released 13 October 2026
Release notes (PDF)
SHA-256 checksum

NETWORKING PRODUCTS

All industrial networking products
EN 50155 Ethernet switches
IEC 61850-3 substation Ethernet switches
IEC 62443-4-2 SL2 Ethernet switches
Industrial cellular 4G 5G 450Mhz routers
Industrial Ethernet extenders
Industrial Ethernet switches
Industrial WLAN APs and Wi-Fi

INDUSTRIES & APPLICATIONS

Trains and Railway
Energy
Maritime and Offshore
Water and Wastewater

SOFTWARE SOLUTIONS

WeOS Operating System
WeConfig Network Configuration Tool
WeConnect Remote Access
Activator Zero Touch Deployment

CONTACT US

Westermo Network Technologies (Head office)
Metallverksgatan 6, SE-721 30 Västerås, Sweden
➜ Find us on Google Maps
Phone: +46 16 42 80 00
E-mail: info@westermo.com

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