Cala d'Oliva, Italy

How the Internet Reaches Cala d'Oliva

Cala d'Oliva is a small settlement on the island of Asinara, off the northwestern coast of Sardinia in Italy. As an island location, its international and domestic internet connectivity depends entirely on submarine cable infrastructure rather than land-based routes. International traffic ultimately arrives through Italy's broader submarine cable network, but for Cala d'Oliva specifically, the direct connection is provided by a domestic inter-island cable that ties it into the Italian mainland network.

The submarine cable serving Cala d'Oliva is a single link — the Piano Isole Minori — placing this location at one terminus of a cable designed to connect Italy's smaller islands to the national network. All external traffic for Cala d'Oliva flows through this single route.

The Cable Serving Cala d'Oliva

The Piano Isole Minori cable spans 830 km and reached ready-for-service status in 2024, though it carries draft status. It connects Cala d'Oliva to five other Italian island landing points: Alicudi Porto, Canneto, Capraia Isola, Carloforte, and Ditella. This is a domestic Italian cable, linking a group of smaller islands rather than connecting Italy to foreign destinations. Packets leaving Cala d'Oliva travel along this cable to reach the broader Italian network, from which onward routing to international destinations takes place through Italy's other submarine and terrestrial infrastructure.

Regional Context

Italy hosts 23 submarine cables across 49 landing points, with an average cable length of 2,610 km and international cables in service dating back to 1996. Cala d'Oliva, served by a single domestic cable, sits at the lighter end of that infrastructure spectrum. Major Italian landing points such as Mazara del Vallo (8 cables), Genoa (6 cables), and Catania (3 cables) carry far more diverse and international connectivity. Cala d'Oliva's role within Italy's cable map is that of a minor island terminus — connected domestically rather than serving as an international gateway.

What This Means for Connectivity

With only one submarine cable serving Cala d'Oliva, all international traffic from the location flows through the Piano Isole Minori link. Any outage on this cable would sever the location's submarine connection entirely, leaving no alternative submarine route. The cable itself is a regional, inter-island system — traffic destined for destinations beyond Italy must first travel through the Italian mainland network before accessing the international cables that land at hubs like Mazara del Vallo or Genoa.

This arrangement is typical of Italy's smaller island communities, where domestic inter-island cables provide the first hop before onward routing through the country's internationally connected landing points. Understanding Cala d'Oliva's position illustrates how Italy's submarine cable network operates on two levels: a set of major internationally facing hubs, and a secondary layer of domestic cables stitching the country's dispersed island communities into the national network.