In October 2025, Unitirreno became operational—the most advanced submarine cable system in the Mediterranean. The system connects Mazara del Vallo (Sicily), Rome Fiumicino, Olbia (Sardinia) and Genoa, creating a digital backbone that crosses Italy from south to north. Here's what it means for Southern Italy and Puglia. Under the Mediterranean, invisible to our eyes, run the true highways of the 21st century. They don't carry goods or people., Alcatel Submarine Networks (ASN), and Elettra Tlc S. announced that the Unitirreno submarine cablesystem has been officially ready for service as of October 16, 2025, being the first in-service 24-fiber pair repeatered subsea cable in the world. A submarine communications cable is a cable laid on the seabed between land-based stations to carry telecommunication signals across stretches of ocean and sea.