TMX5

Overview

TMX5 is a domestic submarine cable system that operates entirely within Mexico, spanning a distance of 383 km. The cable connects two key locations along Mexico's Pacific coast: Mazatlán on the mainland and San José del Cabo on the Baja California Peninsula. Owned and operated by Telmex, one of Mexico's leading telecommunications providers, TMX5 enhances regional connectivity by providing a direct subsea link across the Gulf of California. The system was officially declared ready for service in 2025, making it a relatively new addition to Mexico's telecommunications infrastructure.

As a domestic cable, TMX5 plays a strategic role in supporting local and regional telecommunications needs. It complements Mexico's broader network of submarine cables, which includes both domestic and international systems. TMX5’s relatively short length and exclusive focus on intra-national connectivity distinguish it from larger, transoceanic systems that also serve the region.

Route and Landings

TMX5 connects two landing points along Mexico's Pacific coastline. On the mainland, the cable lands in Mazatlán, a major port city in the state of Sinaloa. Mazatlán serves as an important economic and cultural hub, with its strategic location making it a key node in Mexico's telecommunications network. The second landing point is San José del Cabo, located at the southern tip of the Baja California Peninsula in the state of Baja California Sur. San José del Cabo is part of the larger Los Cabos metropolitan area, a popular tourist destination and a growing urban center.

The route of TMX5 runs across the Gulf of California, a body of water that separates the Baja California Peninsula from mainland Mexico. By providing a direct subsea connection between Mazatlán and San José del Cabo, TMX5 bypasses the need for terrestrial infrastructure that would otherwise have to traverse the length of the peninsula. This direct route is critical for ensuring reliable and efficient connectivity between the two regions, particularly for communities and businesses that depend on robust telecommunications services.

Ownership and History

TMX5 is wholly owned and operated by Telmex, a major telecommunications company in Mexico. Telmex has a long history of providing fixed-line, internet, and network services across the country, and the deployment of TMX5 represents an extension of its domestic infrastructure. As the sole owner, Telmex is responsible for the cable's operation and maintenance, ensuring its integration into the broader national network.

The cable was completed and became ready for service in 2025, marking its entry into operation as one of the newer submarine cable systems in Mexico. Its deployment reflects Telmex's commitment to enhancing regional connectivity and supporting the growing demand for high-speed, reliable telecommunications services in both Mazatlán and San José del Cabo. While TMX5 is not among the longest or most complex submarine cables in Mexico, its role as a domestic link across the Gulf of California is strategically significant.

What Our Measurements Show

Our monitoring of TMX5 has provided insights into its operational performance and impact on regional connectivity. The cable's relatively short length of 383 km contributes to low latency, making it an efficient conduit for data transmission between Mazatlán and San José del Cabo. This is particularly important for applications requiring real-time communication, such as video conferencing and financial transactions.

The Gulf of California, over which TMX5 is laid, presents a relatively calm and shallow marine environment compared to open ocean routes. This has likely contributed to the cable's stable performance since its activation. However, the region is also seismically active, which may pose long-term challenges for maintenance and reliability. Despite these potential risks, TMX5 has so far demonstrated robust operational metrics, supporting its role as a vital link in Mexico's domestic telecommunications network.

By providing a direct subsea route, TMX5 has reduced reliance on terrestrial connections that traverse the Baja California Peninsula, improving overall network redundancy and resilience. This has had a positive impact on the communities and businesses served by the cable, particularly in terms of access to faster and more reliable digital services.