HANNIBAL System

HANNIBAL System: Tunisia-Italy Submarine Cable

The HANNIBAL System is a submarine telecommunications cable connecting Kelibia in Tunisia to Mazara del Vallo in Italy. Owned by Tunisia Telecom, it spans a relatively short distance of 178 kilometers across the Mediterranean Sea. This cable has been listed as in service since 2009, according to GeoCables records, though industry sources may provide conflicting dates. The cable serves as a key link between North Africa and Europe, facilitating international connectivity for Tunisia. What makes the HANNIBAL System particularly interesting is the lack of publicly disclosed technical specifications, including its design capacity, fiber pair count, supplier, and technology. Additionally, discrepancies between theoretical latency calculations and live measurements highlight the complexities of real-world internet routing and performance.

Quick facts

Name	HANNIBAL System
Length	178 km
Ready for Service (RFS)	2009 (GeoCables database; conflicting dates may exist in industry sources)
Owner	Tunisia Telecom
Status	In service
Design Capacity	Not disclosed
Fiber Pairs	Not disclosed
Supplier	Not disclosed
Technology	Not disclosed
Landing Points	Kelibia (Tunisia); Mazara del Vallo (Italy)

Show HANNIBAL System on the interactive cable map

Route

The HANNIBAL System connects Kelibia, a coastal town in northeastern Tunisia, to Mazara del Vallo, located on the southwestern coast of Sicily, Italy. This direct Mediterranean route spans 178 kilometers, making it one of the shorter international submarine cable links. Both landing points are hubs for multiple submarine cables, including Didon, Trapani-Kelibia 2 (KELTRA-2), and others at Kelibia, as well as GO-1 Mediterranean Cable System, Italy-Libya, Janna, Medusa Submarine Cable System, Middle East North Africa (MENA) Cable System/Gulf Bridge International, and Unitirreno at Mazara del Vallo.

Why it was built and what it carries

The HANNIBAL System was built to enhance Tunisia's international connectivity with Europe, particularly Italy, which is geographically close and economically significant for trade and communication. As a direct link between Kelibia and Mazara del Vallo, the cable supports data transmission for internet services, voice communication, and other telecommunications needs. While specific traffic volumes and design capacity are not publicly disclosed, the cable likely plays a role in Tunisia's broader telecom infrastructure, complementing other cables like Didon and Trapani-Kelibia 2.

History: what can be established

GeoCables records indicate that the HANNIBAL System became ready for service in 2009. If industry sources suggest a different year, this discrepancy could arise from delays in documentation, phased activation of services, or differences in defining the "ready for service" milestone. Tunisia Telecom is the sole owner of the cable, reflecting its strategic importance for the country's telecom sector.

Capacity and technology

Publicly available information does not disclose the design capacity, fiber pair count, supplier, or specific technology used in the HANNIBAL System. Without operator documentation, attributing these details would be speculative. Standard industry practices suggest that the cable likely employs optical fiber technology with repeaters to amplify signals, but the exact configuration remains unknown.

Latency: the physics

The theoretical one-way light propagation latency for the cable's 178-kilometer length is approximately 0.9 milliseconds, with a round-trip time (RTT) floor of about 1.7 milliseconds, assuming light travels at 200,000 to 204,000 kilometers per second in fiber. However, live measurements from remote probes show significantly higher RTTs. The minimum recorded RTT from Kelibia to Mazara del Vallo was 4.3 milliseconds, while the average was 70.6 milliseconds over 154 checks. In the reverse direction, the minimum was 256.0 milliseconds, with an average of 281.6 milliseconds over 22 checks. These discrepancies likely result from factors such as land-based routing, terminal equipment delays, and network congestion.

Redundancy: what happens if it breaks

If the HANNIBAL System were to experience an outage, redundancy would depend on alternative cables in the same corridor, such as Didon, which also connects Kelibia to Mazara del Vallo. Repairing submarine cables typically involves deploying specialized ships equipped with remotely operated vehicles (ROVs) to locate and fix faults. Given the cable's relatively short length, repair operations might be faster compared to longer transoceanic cables, but logistical challenges such as weather conditions and availability of repair ships could still impact timelines.

Bottom line

• The HANNIBAL System connects Kelibia, Tunisia, to Mazara del Vallo, Italy, over 178 kilometers.
• Owned by Tunisia Telecom, it has been listed as in service since 2009, though conflicting dates may exist.
• Design capacity, fiber pairs, supplier, and technology are not publicly disclosed.
• Theoretical RTT latency is approximately 1.7 milliseconds for the wet segment, but live measurements show much higher values.
• Redundancy is provided by alternative cables in the same corridor, such as Didon.