IONIAN is a new submarine and terrestrial fiber optic system connecting Athens and Thessaloniki to Milan and Rome.

IONIAN addresses the need for very large wholesale capacity (wavelength, spectrum and dark fiber) between Western Europe and Greece through a new system on a completely diverse route.

IONIAN is neutral

We sell fiber infrastructure and transmission capacity wholesale. We do not address the retail market and we do not compete with our customers.

IONIAN is independent

It belongs to IslaLink, a reputed Submarine Operator with strong expertise in developing, building and operating submarine cables.

submarine cable

The IONIAN Submarine System connects Crotone, Italy, with Preveza, Greece. It is a 24 fiber pairs, unrepeated system with a total distance of 320 km.

The submarine route was selected so that the cable is laid mostly (more than 75% of the total) through deep waters (exceeding 1.000 meters depth) for maximum security against man-made hazards. Elsewhere, the cable has been buried to 1 m.

Given that there are no active submerged elements and that we avoid cable cuts, we expect that the lifetime of the system will exceed by far the standard 25 years one of submarine systems.

Capacity per fiber pair on the submarine segment exceeds 15 Tbps with existing technology, bringing the total potential capacity of the submarine cable to 360 Tbps.

The submarine infrastructure is complemented with two terrestrial fibre rings extending the system to the cities of Milan and Rome in Italy and Athens and Thessaloniki in Greece.


The IONIAN system offers a high capacity, robust fibre route linking Athens with Milan. This new connectivity supports the growth of ultra-broadband services in Greece and the development of Athens and Thessaloniki as regional hubs for cloud, content and telecommunication services. IONIAN brings wholesale capacity, optical spectrum and dark fibre to telecommunication operators and content providers under regular lease or IRU contracts for 10 to 25 years.

The system has been laid in January 2023 and will be in operation by April 2023

Project calendar

  • 2020

    Landing points selected - completed

    Permit Feasibility Study – completed

  • 2021

    Desktop Study, Route Engineering – completed Financial closing – completed Supply Contract signed - completed Marine Survey - completed PIPs (Permits in Principle) applications - completed
  • 2022

    Cable Manufacturing completed
  • 2023

    Cable Main Lay and Post-lay Inspection and Burial - completed

    Landing Infrastructure Construction on-going

    System Commissioning and Final Test

    System Ready for Service


Series of articles on the IONIAN Project

Submarine cables around Greece

The IONIAN system – Why the IONIAN System?

With this post we start a series describing the IONIAN project in detail. This first post touches on the reasons behind the investment, next posts will more descriptive and technical. We hope they will be of your interest.

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