Ultra-high-speed broadband at the core of the regions

Terralpha, a subsidiary of SNCF Réseau, sovereign infrastructure operator

We operate a secure, ultra-high-speed, ultra-low-latency telecoms network deployed along railway lines, offering operators, businesses and public sector bodies reliable, high-performance data transport services of up to 800Gbps throughout France. This unique rail location is a strategic asset, enabling critical flows to be secured via alternative routes, thus contributing to sovereign connectivity.

We also provide Digital Dalles, land ready to host data centres as close as possible to local needs, reducing latency while optimising energy efficiency.

Terralpha offers

Wave

TerraWave - Illuminated fibre

Fast, secure, multi-protocol dedicated connectivity solution between two points on our photonic network

Spectre

TerraSpectrum - Amplified FON

Neutral and transparent data transport solution for your optical signals through our photonic network

DN

TerraPoP - Accommodation

Solutions for hosting local data centres on our prepared sites or space in our shelters for your equipment

The Terralpha network

With an optical network spanning more than 20,000 km and 6,000 municipalities, Terralpha is helping to reduce the digital divide by deploying ultra-high-speed points of presence in the heart of the country.

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Our latest news

18 Jun 2025
news-terralpha

DORA regulation: how the Terralpha network, equipped with Nokia, secures the operational resilience of financial players

The European DORA (Digital Operational Resilience Act) regulation requires financial institutions to...
4 Jun 2025
news-terralpha

The best is the enemy of the good: how can we meet availability needs while limiting the environmental impact?

Terralpha limits its environmental impact by focusing on simplicity...
20 Aug 2024
news-terralpha | press

Record speed: 800 Gb/s between Bordeaux and Marseille

This project, carried out on the production network, represents a major step forward in the field.

Our partners

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