Croatian DWDM trial reveals multi-vendor interoperability

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Deutsche Telekom says it has proved the viability of multi-vendor interoperability on a 100Gbit/s long-haul dense wavelength division multiplexing (DWDM) link, as part of its TeraStream pilot network at Hrvatski Telekom in Croatia.

The link was implemented using a common standard for the optical line side which was jointly developed by Deutsche Telekom, Cisco Systems, Alcatel-Lucent (Alu) and Cortina Systems.

In December 2012, Deutsche Telekom together with Hrvatski Telekom (HT), Deutsche Telekom AG’s subsidiary in Croatia, launched its TeraStream pilot network in Croatia – a network concept based on a cloud-enabled internet protocol (IP) architecture. The pilot features 100 gbit/s links over a filter-less DWDM1 system. Now, multi-vendor interoperability on 100 gigabit Ethernet (GbE) long-haul DWDM links has been proven between IP routers from Cisco Systems and Alcatel-Lucent.

The test was completed over the TeraStream pilot backbone infrastructure between the cities of Split and Varazdin – a fibre distance of about 600 km – using 100GbE IP router interface and transponders from Cisco Systems and Alcatel-Lucent.

The companies say this demonstrates that is possible to use IP routers from different vendors, exchanging data without any intermediate equipment such as traditional DWDM systems.

Bruno Jacobfeuerborn, group chief technology officer for Deutsche Telekom AG, said: 'The need for bandwidth is constantly growing. This milestone is another important step towards the future of generally available 100GbE networking.

'Leveraging the TeraStream passive network and the jointly developed standard, we can achieve drastic cost savings in the area of optical transport. We envision that this will also be the most cost efficient optical interconnect for datacenter applications. We are pleased with the latest advancements from the vendors.'

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