Challenge.

21 sites for EVNG’s networks, each with its own challenges,but one shared goal—maximum operational resilience. Some stations are centrally located, others lie in remote fields. Some benefit from fibre-optic connections, others rely solely on copper lines. Space is often limited, and the climate demands robust solutions, which is why the communications network technology must be not only stable, but also highly available, self-sufficient and scalable. Legal requirements also apply such as uninterrupted operability in the event of a blackout. EVNG was therefore looking for a comprehensive solution that could flexibly adapt to any condition—without compromise.

The dedication shown by everyone involved in this project was truly remarkable. Bechtle, Rittal, Cisco and all partners brought genuine passion to the table. Challenges were met collaboratively and resolved with a clear focus on EVNG’s needs. The spirit of cooperation was equally outstanding. Everyone involved was always available, highly competent, and a pleasure to work with.

Simon Bartoschewski, Team Lead, Communications and Security Systems, ELE Verteilnetz GmbH

Solution.

The solution was an SD-WAN that fits—technically, organisationally and in line with legal requirements. And is flexible enough to scale as needed. The architecture? A modular system that offers the right setup for every site—from compact single cabinets to combined indoor/outdoor solutions. Smaller GPRS units with copper connections? Thanks to tailored outdoor enclosures and independent power supply, even these sites are now seamlessly integrated. Networking technology comes from Cisco, robust cabinet systems from Rittal, and 72-hour fail-safe UPS solutions from Wöhrle. All components are designed to work perfectly with each other, with centralised monitoring and a secure network structure. Sounds impossible? It’s already a reality at EVNG. The architecture, developed by Bechtle in close collaboration with the manufacturers, follows clear principles: Every site is part of a modern SD-WAN, centrally managed via Cisco routers, giving EVNG full visibility and control over all nodes, with the ability to intervene whenever needed. Plus, redundancy is built in at every level ensuring a consistently stable (power) network. The key to success? Careful planning. From the initial workshop and on-site inspections to final implementation, everything was closely coordinated between all partners. Each component was tested, documented and aligned with EVNG in advance. The result? 21 sites with a standardised setup, centrally managed via Cisco SD-WAN—and fully fail-safe to boot. Each node can operate independently for at least 72 hours, with all components working in perfect harmony. Scalable, secure, and thoughtfully designed—a blueprint for future success.

Business benefits.

  • Standardised components simplify management – Backbone and access sites use the same technology sets.
  • Full flexibility thanks to Rittal outdoor cabinets that match the technical specifications of their indoor counterparts.
  • Smart monitoring with vandalism-proof units enabling real-time oversight and rapid emergency response.
  • Minimal maintenance effort thanks to uniform UPS technology across all sites and streamlined spare parts logistics.
  • Future-proof design that supports both legacy analogue systems and modern digital infrastructure.
  • Standardisation with preassembled cabinet solutions including 72-hour emergency power – Ready to deploy straight from the factory.
  • Improved procurement conditions through bulk purchasing of identical components across all site types.
  • Custom site connectivity via fibre, copper or mobile networks – Depending on needs, budget and availability.
  • Centralised support provided by Bechtle with a coordinated maintenance concept covering Cisco, Rittal and Wöhrle components.