Case Study SGRwin at Eon Netz Gmbh

30 Sep 2019

Case Study SGRwin at Eon Netz Gmbh - Screen SGRwin

Almost 10 years ago SGRwin has faced a huge challenge in Utilities´ German market.

SGRwin was analysed by Eon Netz GmbH as an alternative to their NMS and network migration services.

This article is the transcription of the article launched in Germany, if your language is German you can read the original version by scrolling down this site and by clicking the link below.


E.ON Netz operates along the 22,000 kilometres of 110,000-volt line an extensive network of PDH network with approximately 5,900 network elements.

Utilities companies relied for a long time on Nokia’s PDH transmission technology. Thereby, there were a real need to keep running the existing PDH installations.

However, when network management comes into play, users are at a dead end because the delivery of individual hardware components has been discontinued.

Eon Netz GmbH was looking for a suitable alternative and was surprised by the possibilities they found. 

“After the NMS / 10 MF mediation device for Nokia network management was discontinued, PDH technology was initially available to us. However, this technology is still indispensable and critical for some services, such as the transmission of protection signals.»

confirmed Stefan Maier, Network Management Manager at Eon Netz

Services such as the transmission of protection signals must be transmitted in a reliable and safe way within a defined time. Although NMS/ 10MF system was discontinued, Stefan Maier estimated 10 years of usage of PDH technology and components. Therefore, a replacement for the Nokia NMS / 10 MF was sought. The replacement of the discontinued NMS hardware was not a solution since the NMS / 10-MF system no longer supports current Windows operating systems.

What problem were Eon trying to solve?

An increasing challenge for Eon Netz was to ensure that the switched communication paths are kept up to date with the most frequent changes in the connection in the network. As the PDH system did not previously have end-to-end management and had no interface to the higher-level documentation system Connect Master, this considerably increased the effort for switching the connections and for the documentation. While the SDH («Synchronous Digital Hierarchy») system automatically provides the necessary documentation information, this requires to be done manually for the level below 2 Mbit/s.

Before our NMS was evaluated as a possible alternative for Eon´s challenges. SGRwin had already become a successful solution within Spanish Utilities market, specially for an alarm management of Nokia PDH technology. 

Further the testing of SGRwin revealed surprising new opportunities, working together with 3M, SGRwin was adapted to Eon´s needs. 

  • Higher design freedom at the graphical network representation.
  • Element management, real-time alarm detection and alarm management.
  • Detailed fault isolation down to the individual functional blocks of network components.
  • Macro capability to control and monitor a network
  • End-to-end management: Automatic generation of a point-to-point connection on a timeslot level (64 kbit / s) with diagnostic capabilities
  • Northbound interfaces for connection to other alarm systems and document management

In addition to the SNMP network management, SGRwin represents a suitable platform for easier integration of many SNMP-based device technologies. Together with the functionality for the PDH technology, SGRwin can be considered as an «umbrella network management platform».

In order to meet Eon needs, the most important requirements were following three features:

  • The replacement of the obsolete NMS/10-MF system with a connection to an existing higher-level alarm management
  • An interface to the documentation system
  • End-to-end management

What benefits has Eon Seen?

“SGRwin had to be adapted for us (language, features…etc.). The introduction of an end-to-end management for the PDH network has brought us a great efficiency advantage. A new connection at the time slot level can now be switched intuitively by selecting the end points. “

Stefan Maier, Network Management Manager at Eon Net

How did SGRwin solve Eon requirements?

  • Replacement of NMS/10-MF-Systems: The old NMS/10-MF-Hardware was replaced by new DCN adapter as concentrators for PDH bus management. The connection to the higher-level management system (IBM Tivoli Netcool) enables the integration of all alarms messages to be combined in a central alarm management. For this, also the SNMP interface has been adapted. A new feature was designed to resynchronize the alarms, as well.
  • Documentation system interface: In this project, an interface to the central documentation management Connect Master was implemented. The entire documentation of the Eon network message network is recorded in the Connect Master. With the newly created interface, information about network elements, such as serial numbers or the configuration, is automatically read out of the devices. This read out information is transferred to the central documentation management together with the connection data of all 64 kbit / s trails. Stefan Maier have estimated to save 30 min in efforts for each connection.
  • End-to-end management: Another major efficiency advantage was the introduction of company-wide end-to-end management. Where employees previously had to dial into each node with a local console and configure individual CrossConnectors, a new connection at the time slot level can now be switched intuitively by selecting the endpoints. End-to-end management shows which free resources are available in the network and a simple type of network clean-up has been created.
  • Improved service quality and scalability: All employees have a complete information access. If any fault occurs, the system shows you immediately which services are affected. Further, the unrestricted integration of future PDH network element also have been assured.

Some barriers to commissioning

As a major barrier to the graphical representation of the network topology presented with more than 5,000 network elements on the same screen window. The display of so many elements would have lasted up to 15 minutes. As an alternative solution, CIC´s programmers and 3M developed a new view where irrelevant nodes and multiplexers have been filtered. Due to the significantly lower number of stations, the view is now built up in a few seconds.


By combining the powerful NMS such as SGRwin, the unconventional support from CIC and the good support from 3M Services the project has been completed successfully, Stefan Maier also said:

“It was one of the smoothest projects that we ever had before, and by the NMS better support, we can now save time, reduce efforts and minimise costs”.

Please click the following link to download the original press release:

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