Echo subsea cable system connnects Eureka in California, Guam, Indonesia and Singapore, and other locations.

Echo’s architecture is designed for maximum resilience, with unique Trans Pacific route to Southeast Asia avoiding crowded, traditional paths to the north.

Echo subsea cable system is the first-ever subsea cable to directly connect the U.S. to Singapore with direct fiber pairs over an express route.

The main trunk of the Echo cable system spans 16,206km from Singapore to Eureka, California, the United States, with 12 fiber pairs and an initial design capacity of 12 Tbps per fiber pair for a total system capacity of 144 Tbps. 

The system capacity of the Echo cable system has been upgraded to 260 Tbps between Guam and California.

Google and Facebook are joint builders of the Echo cable system. Indonesian telecommunications firm XL Axiata acts as the landing party in Indonesia. Google through its subsidiary Google Singapore Pte Ltd is the landing party in Singapore. Facebook through its subsidiary Edge USA is landing party in the United States for California and Guam landings. 

The Echo subsea cable system is supplied by NEC.

Launched in early 2021, the Echo subsea cable system was expected to be ready for service in 2023. It is now partially operational between Guam and California, delivering a system capacity of 260 Tbps.

According to earlier news on the Palau Cable 2, the Echo subsea cable system will have a branch to Palau Island. The Palau Cable 2 is in fact the Echo Palau Branch.

In January 2024, Trans Pacific Networks (TPN) announced to become a party for the Echo cable system. TPN was in fact the initial party of the Echo project before Google and Meta stepped in the project which was then called TPN project. TPN has selected Telstra International as sales partner, landing partner in Singapore, and NOC service provider. TPN owns 3 fiber pairs on the Echo cable system.