null Network capacity significantly expanded in Funet trials

Network capacity significantly expanded in Funet trials

Flexible capabilities enable 400GbE transport over 2,844km link on existing research and education network.

CSC – IT Center for Science, which operates the Finnish University and Research Network (Funet), has transported 400Gbit/s over its existing long-haul network using the ADVA FSP 3000 TeraFlex.
The trials pave the way for ultra-fast access to Finland’s supercomputers and could offer a major boost to Europe’s research and education community. They also demonstrated the terminal’s ability to carry 1200Gbit/s channels for the transport of 3x400GbE over a live meshed ROADM infrastructure.

What’s more, the trials highlighted how the technology maximizes spectral efficiency in any open line system. Using the terminal’s ultra-flexible modulation and adaptive baud rate capabilities, Funet also achieved new levels of bandwidth efficiency – and therefore could significantly reduce opex – for 400GbE, 100GbE and lower speed services.

- These trials demonstrate how the technology performs over long-haul distances, and the results were well above our expectations. It was the first time when we really needed a gridless line system to enable a full choice of line speeds and modulations. The increased performance of TeraFlex over the previous generations, and flexibility to tune line speed and modulation, will allow us to optimize spectrum usage and minimize the cost of providing services to our users, said Jani Myyry from CSC.

- Our network provides essential connectivity for research and education institutes in Finland and throughout the Nordics. Initially we were aiming for transport based on 100Gbit/s and 200Gbit/s but are now seeing an increasing need for speeds above that, up to use cases requiring a bandwidth of multiple Tbit/s. TeraFlex and our ADVA open line system infrastructure enable us to efficiently scale our network with line speeds of 400Gbit/s and above. The trials show how the technology dramatically increases flexibility and efficiency for 100GbE and 400GbE transport over long-haul distances, according to Myyry.

Funet’s tests highlight the ability of the technology to massively increase the capacity of existing terrestrial long-haul networks. The low-power 1RU terminal enables channels of up to 1200Gbit/s for 3x400GbE services and a total capacity of 3.6Tbit/s.

Using network telemetry, software-defined fractional QAM modulation and adaptive baud rate capabilities, the solution is able to ensure maximum spectral efficiency at every point in the network. This enables operators to leverage previously unused optical spectrum so that deployed infrastructure can be made to transport far more data. As well as succeeding with 600Gbit/s transport over a 278km and with 400Gbit/s over 2,844km the trials showed the power of harnessing granular increments with speeds of 300Gbit/s over 4,681km.

- These tests highlight how it’s now possible to optimize all optical paths over any reach. They demonstrate to the research and education industry that there’s a new way for long-distance networks to support soaring data demand. With its ultra-flexible modulation, our compact and open FSP 3000 TeraFlex™ is the key to unlocking maximum value in any network, commented Henning Hinderthür, VP, product line management, ADVA.

- Together with CSC we’ve shown how deployed infrastructure operating with coherent channels can transport traffic at unprecedented speeds. And not only that. Our unique TeraFlex™ solution also enhances performance, improves port efficiency and delivers major opex savings. It massively increases the efficiency of existing 100GbE connectivity, while also providing a way to meet the needs of emerging data-hungry applications for 400GbE and beyond, Hinderthür concludes.

Funet (Finnish University and Research Network) has been built for the needs of higher education institutions and the research community. It serves around 80 organisations and approximately 370,000 users connected with Finnish research, teaching, and higher education institutions. It provides uncongested, reliable and cost-effective connections between users, with the public Internet, and with worldwide research networks such as the Nordic NORDUnet and the European GÉANT.

ADVA is a company founded on innovation and focused on helping our customers succeed. Our technology forms the building blocks of a shared digital future and empowers networks across the globe. We’re continually developing breakthrough hardware and software that leads the networking industry and creates new business opportunities. It’s these open connectivity solutions that enable our customers to deliver the cloud and mobile services that are vital to today’s society and for imagining new tomorrows. Together, we're building a truly connected and sustainable future. For more information on how we can help you, please visit us at

CSC is a Finnish center of expertise in ICT that provides world-class services for research, education, culture, public administration and enterprises, to help them thrive and benefit society at large.