What is it called when laying fiber optic cables for China Telecom and China Mobile

China Telecom and China Mobile do not use exactly the same fiber optic cables; while they share some international submarine cables, China Mobile has developed advanced triple-band multi-core fibers that differ from standard deployments.Shared InfrastructureBoth China Telecom and China Mobile participate in international submarine cable projects, such as the New Cross Pacific (NCP) Cable System, which connects the US and Asia with landings in China, Korea, Taiwan, and Japan. This system uses high-capacity fiber pairs with 100Gbps DWDM technology and a total design capacity of 70Tbps, and both operators are consortium members, sharing the same physical cable infrastructure for trans-Pacific connectivity .Proprietary and Next-Generation FiberChina Mobile has independently launched the world's first S+C+L triple-band multi-core optical fiber cable, which uses three distinct frequency bands (S, C, L) and a four-core fiber structure. This design increases total capacity by over five times compared to traditional single-core fibers and is optimized for AI infrastructure, cloud computing, and next-generation networks like 5G-A/6G . This cable is independently designed and commercialized, marking a technological leap beyond standard fiber used in shared networks.Domestic Fiber DeploymentWithin China, both operators rely heavily on fiber for fixed broadband, with 99% of lines on fiber-optic networks. However, the deployment strategies differ: China Telecom typically uses conventional single-core or dual-core fibers for mass broadband coverage, while China Mobile is actively integrating next-generation multi-gigabit, AI-enabled fiber networks to support smart cities, predictive maintenance, and high-capacity data services .Key DifferencesFiber Type: China Telecom mainly uses standard single-core or dual-core fibers; China Mobile has multi-core, triple-band fibers.Capacity: China Mobile's triple-band fibers offer significantly higher transmission capacity.Purpose: China Mobile's advanced fibers are designed for AI, cloud computing, and high-speed interconnections, whereas China Telecom's fibers focus on broad coverage and backbone connectivity.Technology Leadership: China Mobile is setting new standards in optical communication, while China Telecom largely follows established global standards. In summary, while both operators share some international cable infrastructure, China Mobile's proprietary triple-band multi-core fiber represents a distinct technology that is not used by China Telecom, reflecting differences in capacity, design, and strategic focus.