The
Jamaica Submarine Cable Festoon System (JSCFS) is a submarine telecommunications cable connecting Bull Bay and Montego Bay, both located in Jamaica. With a recorded length of 342 kilometers, this cable is listed in GeoCables' database as having been ready for service in 1997. It is owned by CW Jamaica and remains operational as of the latest data.
While the cable's basic parameters are known, much about its technological specifications and capacity remains undisclosed in public sources. This lack of transparency is not uncommon for older submarine cables, particularly those serving regional routes. The JSCFS is part of a network of cables that land at both Bull Bay and Montego Bay, providing redundancy for telecommunications in Jamaica.
Quick facts
| Name | Jamaica Submarine Cable Festoon System (JSCFS) |
| Length | 342 km |
| Ready for Service (RFS) | 1997 (GeoCables database value; other sources not surfaced) |
| Owner | CW Jamaica |
| Status | In service |
| Design capacity | Not disclosed |
| Fiber pairs | Not disclosed |
| Supplier | Not disclosed |
| Technology | Not disclosed |
| Landing points | Bull Bay (Jamaica), Montego Bay (Jamaica) |
| Alternatives in the same corridor | Cayman-Jamaica Fiber System (CJFS), Fibralink |
Route
The JSCFS connects two Jamaican landing points: Bull Bay on the southeastern coast and Montego Bay on the northwestern coast. Both locations are key hubs for telecommunications infrastructure in Jamaica. Bull Bay serves as a landing site for multiple cables, including the Cayman-Jamaica Fiber System (CJFS) and Fibralink, while Montego Bay similarly hosts these cables. This geographic configuration ensures reliable connectivity for the island's telecommunications network.
Why it was built and what it carries
The JSCFS was likely built to enhance domestic telecommunications within Jamaica by providing a direct submarine link between two major population centers. Submarine cables such as this typically carry a mix of voice, data, and internet traffic. However, without publicly disclosed information about its design capacity or technology, the specific traffic it handles cannot be definitively stated.
History: what can be established
The GeoCables database records the JSCFS as having been ready for service in 1997. No conflicting dates have been surfaced from industry sources, but it is worth noting that documentation for older cables can sometimes be sparse or inconsistent. The cable was built during a period of significant expansion in submarine telecommunications infrastructure, as operators sought to meet growing demand for connectivity in the Caribbean region.
Capacity and technology
Publicly available data does not disclose the design capacity, number of fiber pairs, supplier, or specific technology used in the JSCFS. Given its age, the cable likely predates many of the advancements seen in modern submarine systems, such as coherent optical technology or wavelength-division multiplexing (WDM). However, attributing specific technical characteristics without operator documentation would be speculative.
Latency: the physics
The theoretical one-way light propagation delay over the cable's 342 km wet segment is approximately 1.7 milliseconds, with a round-trip time (RTT) floor of 3.4 milliseconds. These calculations assume light traveling through fiber at speeds between 200,000 and 204,000 km/s. Real-world latency would be higher due to factors such as signal processing in terminal equipment, routing through network nodes, and delays in the terrestrial segments at each landing point. No live latency measurements are currently available for this cable.
Redundancy: what happens if it breaks
If the JSCFS were to experience an outage, redundancy is provided by other cables landing at Bull Bay and Montego Bay, including the Cayman-Jamaica Fiber System (CJFS) and Fibralink. These alternative systems ensure continued connectivity for Jamaica, though repair logistics for submarine cables can be complex and time-consuming. Repairs typically involve deploying specialized cable ships to locate and fix the fault, a process that can take days or weeks depending on the nature of the damage and weather conditions.
Bottom line
- The JSCFS is a 342 km submarine cable connecting Bull Bay and Montego Bay in Jamaica.
- It was recorded as ready for service in 1997, with no conflicting dates surfaced.
- Owned by CW Jamaica, the cable remains in service but lacks publicly disclosed data on capacity, fiber pairs, supplier, or technology.
- Theoretical latency over the wet segment is approximately 3.4 ms RTT, though real-world latency would be higher.
- Redundancy is provided by other cables landing at both endpoints, including CJFS and Fibralink.