Tag: Transatlantic

  • EllaLink gets anchor customer for trans-Atlantic cable

    EllaLink gets anchor customer for trans-Atlantic cable

    The Atlantic will be getting yet another subsea cable system it seems, but this time it’s on a route rarely travelled.

    EllaLink has won a key anchor customer for a cable system connecting Portugal with Brazil. The research and education networks GEANT and RedCLARA are putting €25 million ($29.6 million) up for direct capacity between Europe and South America.

    As currently planned, EllaLink will bring some 72Tbps of connectivity between the two continents. In South America it will land at both Fortaleza and at Praia Grande near Sao Paolo, two popular cable destinations with plenty of interconnection options.

    In Portugal the system will come ashore at Sines, not far from Lisbon and at a new location distinct from other cables landing in the region and with terrestrial access over to Madrid of course. In between are several islands that will probably see branches, such as Madeira and Cabo Verde.

    We haven’t seen a cable on this route since ATLANTIS-2, and unlike most new builds it doesn’t seem to be on the radar of the big cloud/content guys. That may change as interest in the nearby interconnection market of Madrid continues its rapid growth.

    EllaLink offers a bypass route between Europe and Latin America that doesn’t land first in the eastern US. By taking the direct route and avoiding North America, latency will be substantially reduced, probably by about half or more.

    Alcatel Submarine Networks will be handling the installation, which is envisioned to be complete sometime in 2020.  With much of its funding in place, it looks as if this cable system is ready to move onto the marine survey and construction.

  • Nokia, Facebook set transatlantic efficiency record

    Nokia, Facebook set transatlantic efficiency record

    Nokia and Facebook have announced they have set a new spectral efficiency record over a transatlantic subsea cable using Nokia Bell Labs’ new probabilistic constellation shaping technology (PCS).

    During the trial involving a 5,500km subsea cable between New York and Ireland, shaped 64 quadrature amplitude modulation (64-QAM) was used to achieve record spectral efficiency of 7.46 b/s/Hz.

    PCS uses shaped QAM formats to flexibly adjust transmission capacity to near the physical limits of a fiber link.

    The results showed an increase of nearly 2.5 times more capacity than the stated limit of the system, indicating the potential to upgrade the cable to 32 Tbps per fiber.

    Transmission tests validated the successful transmission of 8-QAM wavelengths running at 200 Gbps and 16-QAM wavelengths running at 250 Gbps, a first for a transatlantic transmission.

    “Facebook wants to increase the pace of innovation and adoption of next-generation optical technologies,” Facebook global optical network architect Dr Stephen Grubb said.

    “This field trial with Nokia demonstrates that the scalable optical technology of PCS together with narrow linewidth laser sources can achieve capacities extremely close to the Shannon limit. This ensures that we are both maximizing our investment in submarine cable systems, as well as continuing to drive the cost per bit of submarine transport lower.”