The tests involved dividing Telefónica Spain's mesh photonic network into two independent domains from different providers, Alcatel-Lucent and Huawei. To leverage the capabilities of both domains, a successful field test was conducted to interconnect them, enabling end-to-end transport of circuits that, by their nature, traverse both domains. This also enabled new multi-domain routes for traffic restoration, thereby increasing the level of security at the transport layer.
The experience was carried out by establishing a 10 Gbit/s service with protection and restoration between Huesca and Madrid, covering a distance of more than 1000 km by the longest route, with the origin and destination of the service being in different photonic grids of the aforementioned suppliers.
The equipment used for this test consisted of the Alcatel-Lucent 1830PSS family and the Huawei OSN x800. The 10 Gbit/s service was carried over a 100 Gbit/s channel in the Alcatel-Lucent mesh network and over a 40 Gbit/s channel in the Huawei mesh network. Service restoration and protection tests were successfully performed, verifying automatic service recovery in the event of an outage.
This interconnection test is a key aspect in the future evolution of Telefónica España's photonic meshes to achieve end-to-end restoration of circuits that cross different photonic mesh domains from different providers.
High-speed signals of 40 and 100 Gbit/s currently, and 200, 400 and 1000 Gbit/s in the future, are switched at the photonic level without passing to the electrical domain; that is, the light (wavelengths) on which the large aggregate flows of information from our customers are transported is switched directly.
Telefónica's commitment to video, the deployment of FTTH access technology, and 4G for mobile broadband has led to a significant increase in bandwidth demand from customers. This growth impacts various levels of the network, including the transport backbone where different data flows are aggregated.

More information