In an era where digital transformation shapes every aspect of our lives, the need for robust and ultra-fast data transmission has never been more critical. The Amitié transatlantic communications cable, stretching 6,234 kilometers across the ocean, has become a symbol of this transformation. Connecting Boston, Massachusetts, USA, to Bordeaux, France, this cable represents a significant collaboration between Cisco and Microsoft. They are pushed the boundaries and achieving a record transmission speed of 800 Gbps that heralds a new dawn for data communication, linking key locations across continents in unprecedented ways.

Jonathan Davidson’s tweet heralds this achievement as not just a technological milestone, but a beacon for the future of global connectivity. The view of Cisco’s EVP/GM is also confirmed by Jami Gaudette – Director of Network Engineering and AI Infrastructure in Microsoft:

The transmission of 800G over 6,234 kilometers is a milestone that demonstrates SDM cables can deliver increased capacity over traditional subsea cables. This field trial demonstrates what is now a commercial technology for subsea routes, and we can improve the network capacity to help drive digital transformation for people, organizations, and industries around the world.” said Jamie Gaudette.

Technology unveiled

At the heart of this achievement lies Space Division Multiplexing (SDM) technology, enabling unprecedented data transmission rates. This trial saw speeds reaching 800Gbps, a figure once thought unattainable, over a cable featuring 16 fiber pairs — surpassing traditional capacities. Previously, the industry benchmark hovered around 600G transmission over vast distances, marking this as a significant leap forward. Powered by advanced coherent transmission systems, these speeds are not just numbers but represent the potential for a more connected and efficient world.

Solving problems

The implications of such technological advancement extend far beyond the mere capability of faster data transmission. In addressing the ever-growing demand for cloud services and AI-driven applications, this leap in subsea network capacity can significantly reduce latency, improve reliability, and unlock new possibilities in digital innovation. It’s a step toward solving tomorrow’s challenges, enabling a seamless flow of information across continents.


This development is more than a technical achievement – it’s a testament to human ingenuity and the relentless pursuit of progress. As we reflect on this milestone, it’s clear that the benefits extend across industries. Data centers and web hosting services stand to gain from enhanced capacity and efficiency.

While specific investment figures remain under wraps, the collaboration between Cisco and Microsoft in this trial underscores the strategic importance and potential return on such innovative endeavors. It’s a bold step forward, promising to shape the future of digital communication and connectivity.