Success Story

With high-speed through Passau: Telepark offers secure fiber optic network for all

"Think global – act local" – This is the slogan under which Telepark Passau offers multiple telecommunications solutions for private and business customers. Since its foundation in 1998, the regional city carrier has been continuously expanding a fiber optic network which fulfils even highest demands: Households can book data transmission rates of up to 250 Mbps, companies select from various telephony, Internet or housing offers – and all of this with a network availability of up to 99.9%. In this context, it is obvious that network security is considered the top priority within the wholly owned subsidiary of the public utility enterprise Stadtwerke Passau GmbH. Another important role in this context is played by the so-called geographical redundancy: Telepark operates a second server site that can take over the main tasks of the main server centre in case of an outage. In active operation, the services work spread over both sites. The company opted for the modular CWDM solutions by MICROSENS GmbH & Co. KG for the coupling of the data centers.

Networked Security

Already today, Telepark Passau as a regional carrier owns a fiber optic network with a route length of approximately 170 km. The area-wide expansion throughout the city of Passau will be continued in the following years according to demand. The core element of the network is the backbone, which is operated with SDH and IP components. More than 2000 private customers as well as several hundred companies are using the infrastructure, and the number increases daily. As a result, the demands made on the transmission technology are growing as well. Particularly the reliable function of the network is a top-priority for the customers. The geographical separation of the second server site from the headquarters is essential in this concept. At the same time, however, it should not impair the performance of the network.

Multiplied Capacity

Telepark Passau decided to couple both locations for wavelength multiplexing, or specifically: for Coarse Wave Division Multiplexing (CWDM). The optical multiplexing procedure enables the city carrier from lower Bavaria to multiply the capacity of its existing fiber optic trunks in a cost-effective way. The parallel transfer of several wavelengths over a fiber pair makes it possible to reach transmission capacities of several hundred Gigabits per second without the necessity to install additional optical fibers. With regard to the components, Matthias Weindler, network specialist of Telepark, particularly focusses on the reliability of the systems: "Ideal devices are those which you pass by after years and see that they continue running without any problems after all this time," explains the IT expert, grinning. He has had positive experiences like this with media converters of MICROSENS for several years now. This was ample reason for him to take a closer look at the xWDM solutions of the German vendor.

Simplified Operation

The systems of the MICROSENS Optical Transport Platform won over Telepark Passau immediately: They can be configured easily and quickly by means of a homogeneous management software. Both the administration and the long-term maintenance of the components are simplified by means of optimised configuration options. In addition, the modular setup of the systems is ideally suited for the application by the city carrier. The chassis can be equipped individually with different modules according to demand. The modules, in turn, can be complemented or replaced any time. Matthias Weindler explains: "We could even use an existing MICROSENS chassis, since the media converters originally contained in it were superfluous to a large extent. This enabled us to save much space in the rack and to reduce reassembly times, as we only had to put the new CWDM cards into operation."

Reliable Technology

Today, both sites are interconnected by means of two data connections set up in a ring-shaped structure. For security reasons, the redundant trunk uses another route and is somewhat longer because of that. Multiple services are running on the two optical fibers, which can draw on a total bandwidth of 90 to 100 Gbps. Most systems can easily be coupled over CWDM by means of integrated modules, so-called SFPs. Alternatively, there is always the option to use a media converter. Telepark selected this option for the storage systems of EMC, which also exchange data over CWDM. "The consultants of MICROSENS always answered our questions on this subject matter quickly and competently. The service of the German vendor is really excellent," states Matthias Weindler. The satisfaction of the customer is reflected in the fact that he recommended the services of MICROSENS to his colleague Sebastian Krückl, who is responsible for the networking of a new Telepark building as a project manager. In cooperation with SKM Skyline, Telepark Passau has also installed MICROSENS products on the LAN sector in the meantime: all floor boxes of the new building were equipped with the practical FTTO installation switches.

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Transmitting information via fiber optic connections offers numerous benefits. MICROSENS GmbH & Co. KG recognised this very early on. As one of the pioneers, the company has developed and produced high-performance communications and transmission systems in Germany since 1993. Individually matched to the demands of diverse usage areas and embedded in comprehensive concepts for individual sectors. But, above all, close to the customer. Technical challenges from customer projects are incorporated directly into product development. This way, IP-based automation solutions are created for modern buildings, cost-efficient network concepts for the office and workspace, robust and fail-safe solutions for industrial environments, optical transport systems future-oriented wide area networks and efficient coupling of sites and computer centres.