Optical Cable Transport System
An optical transport network is a high-speed communication system that sends light signals over fiber-optic cables to move large amounts of data across long distances. The Optical Transport Network (OTN) is an internationally standardized set of protocols that define how digital signals are encapsulated, multiplexed, and transported across optical fiber infrastructure. In many cases, it sits underneath IP and Ethernet services, acting as the physical and optical foundation that keeps everything moving.
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