Paniolo Cable Network: Interconnecting the Hawaiian Islands
The Paniolo Cable Network is a submarine cable system connecting several islands of Hawaii, United States. Owned by Hawaiian Telcom, the cable spans approximately 576 kilometers and has been listed as in service since 2009 according to GeoCables data. Its primary purpose is to facilitate communication and data transfer across the islands, supporting local telecommunications infrastructure.
What makes the Paniolo Cable Network noteworthy is its role in connecting multiple landing points across Hawaii, including
Hawaii Kai,
Kaunakakai,
Kawaihae,
Kekaha,
Lahaina,
Makaha, and
Makena. Despite its significance, many technical details about the cable, such as its design capacity, fiber pair count, supplier, and technology, remain undisclosed in public sources. This lack of transparency leaves room for speculation but underscores the importance of essential documentation in the submarine cable industry.
Quick facts
| Name | Paniolo Cable Network |
| Length | 576 km |
| Ready for Service | 2009 (GeoCables database value) |
| Owner | Hawaiian Telcom |
| Status | In service |
| Design Capacity | Not disclosed |
| Fiber Pairs | Not disclosed |
| Supplier | Not disclosed |
| Technology | Not disclosed |
| Landing Points | Hawaii Kai, Kaunakakai, Kawaihae, Kekaha, Lahaina, Makaha, Makena |
Route
The Paniolo Cable Network connects seven landing points across the Hawaiian Islands: Hawaii Kai, Kaunakakai, Kawaihae, Kekaha, Lahaina, Makaha, and Makena. These locations span multiple islands, including Oahu, Maui, Molokai, and the Big Island of Hawaii. The cable’s route enables inter-island connectivity, which is essential for local telecommunications and internet services.
Several of these landing points host other submarine cables, providing redundancy and alternative routes. For instance, Kaunakakai is also a landing site for the
Hawaii Island Fibre Network (HIFN) and
Hawaiian Islands Fiber Link (HIFL), while Kawaihae connects to the
Hawaii Inter-Island Cable System (HICS), HIFN, and
Honotua. Makaha serves as a landing point for CHI, HIFN, and
SEA-US cables.
Why it was built and what it carries
The Paniolo Cable Network was built to enhance connectivity between the Hawaiian Islands, supporting telecommunications, internet services, and data transfer. As a geographically isolated state, Hawaii relies heavily on submarine cables for communication infrastructure. This cable likely carries a mix of voice, data, and internet traffic, serving both residential and business needs.
While specific details about its design capacity and technology are not publicly disclosed, the cable’s role in inter-island connectivity makes it an essential part of Hawaii’s telecommunications landscape.
History: what can be established
GeoCables data records the Paniolo Cable Network as ready for service in 2009, and it remains listed as in service today. Publicly available sources do not provide alternative dates for its commissioning, nor do they offer insights into its construction or initial deployment.
The cable is owned by Hawaiian Telcom, a major telecommunications provider in Hawaii. Its development likely aimed to address the growing demand for reliable inter-island connectivity, driven by increased internet usage and data transfer needs.
Capacity and technology
The design capacity, fiber pair count, supplier, and technology of the Paniolo Cable Network are not disclosed in publicly available sources. Without operator documentation, it is impossible to state these specifications with certainty. This lack of transparency is not uncommon in the submarine cable industry, especially for cables serving regional or domestic markets.
Latency: the physics
Theoretical latency for the Paniolo Cable Network, based on its 576 km length, is approximately 2.8 milliseconds one-way and 5.6 milliseconds round-trip (RTT) for light propagation through fiber. However, real-world latency is higher due to additional factors such as land-based network segments, terminal equipment, and routing.
Live measurements from remote probes show significant variation in RTT to Lahaina, one of the cable’s landing points. For example:
- Almaty -> Lahaina: min 87.0 ms, avg 243.0 ms
- Jerusalem -> Lahaina: min 141.9 ms, avg 142.1 ms
- Saint Petersburg -> Lahaina: min 112.4 ms, avg 117.9 ms
- Cape Town -> Lahaina: min 280.2 ms, avg 280.3 ms
- Singapore -> Lahaina: min 175.0 ms, avg 175.4 ms
- Sydney -> Lahaina: min 136.2 ms, avg 136.5 ms
These measurements reflect the full internet path, not the cable itself, and include delays from intermediate routing and network congestion.
Redundancy: what happens if it breaks
Redundancy for the Paniolo Cable Network is provided by other submarine cables landing at its shared points. For example, Kaunakakai connects to the Hawaii Island Fibre Network (HIFN) and Hawaiian Islands Fiber Link (HIFL), while Kawaihae is linked to HICS, HIFN, and Honotua. Makaha hosts CHI, HIFN, and SEA-US cables.
In the event of a cable fault, traffic can be rerouted through these alternative systems. Repairs to submarine cables typically involve locating the fault, deploying specialized ships, and using remotely operated vehicles (ROVs) or grappling equipment to retrieve and repair the damaged section.
Bottom line
- The Paniolo Cable Network spans 576 km and connects seven landing points across the Hawaiian Islands.
- Owned by Hawaiian Telcom, it has been listed as in service since 2009.
- Design capacity, fiber pairs, supplier, and technology are not publicly disclosed.
- Theoretical latency is approximately 2.8 ms one-way, but real-world RTT is higher due to additional factors.
- Redundancy is provided by other cables landing at shared points, ensuring continuity in case of faults.