KAFOS

Overview

KAFOS is a submarine cable system spanning 538 kilometers across the Black Sea, connecting Bulgaria, Romania, and Turkey. Operational since 1997, it is a key infrastructure component for regional telecommunications, linking the western and southern shores of the Black Sea. The cable supports direct connectivity between these three countries, facilitating both bilateral and trilateral communications. Its compact design and strategic placement make it a vital asset for intra-Black Sea data exchange, complementing other regional cable systems.

The KAFOS system enhances the telecommunications landscape of the Black Sea region by providing a reliable and direct route for data transmission. Its relatively short length and focused scope distinguish it from larger, more expansive systems in the area, making it well-suited for its specific regional role. The cable's configuration, with multiple landing points in Turkey, underscores its importance in connecting coastal communities and supporting regional digital infrastructure.

Route and Landings

KAFOS connects four landing points across three countries. In Bulgaria, the cable lands at Varna, a major port city and a key economic center on the Black Sea coast. Varna's strategic location makes it an important hub for maritime and digital connectivity in Bulgaria. In Romania, the cable reaches Mangalia, a southern coastal city known for its port and proximity to the Bulgarian border, further emphasizing the regional integration facilitated by KAFOS.

In Turkey, KAFOS has two landing points. The first is Igneada, a small town on Turkey's northwestern Black Sea coast, which serves as an entry point for the cable into the country. The second landing is in Istanbul, Turkey's largest city and a critical hub for regional and international communications. Istanbul's position as a transcontinental city bridging Europe and Asia enhances the strategic value of KAFOS, as it connects the Black Sea region to broader global networks. The cable's route across the Black Sea ensures direct and efficient connectivity among these coastal cities.

Ownership and History

KAFOS is owned and operated by Turk Telekom International, the international division of Turk Telekom, one of Turkey's leading telecommunications providers. As the sole owner, Turk Telekom International manages the cable system independently, ensuring its operational reliability and integration with the company's broader network infrastructure.

The cable became ready for service in 1997, making it one of the earlier submarine cable systems in the Black Sea region. Its establishment marked a significant step in enhancing regional telecommunications, providing a direct and resilient link among Bulgaria, Romania, and Turkey. Over the years, KAFOS has maintained its relevance as a critical infrastructure asset, supporting the growing demand for data exchange and connectivity within the region. Its longevity and continued operation underscore its robust design and strategic importance in the Black Sea telecommunications ecosystem.

What Our Measurements Show

Our live monitoring of KAFOS includes 305 measured corridors, providing insights into its performance. The best recorded round-trip time (RTT) is 17 milliseconds, while the average RTT is 118 milliseconds. These measurements reflect the cable's efficiency in facilitating data transmission across its 538-kilometer route. The relatively low latency highlights the benefits of its direct submarine path compared to alternative terrestrial routes.

The cable's performance underscores its role as a reliable and efficient conduit for regional connectivity. By linking Varna, Mangalia, Igneada, and Istanbul, KAFOS supports robust data exchange among Bulgaria, Romania, and Turkey. Its strategic placement and consistent performance make it a cornerstone of the Black Sea's digital infrastructure, enabling seamless communication across the region.