Synchronous optical networking (SONET) and synchronous digital hierarchy (SDH) are standardized multiplexing protocols that transfer multiple digital bit streams over optical fiber using lasers or light-emitting diodes (LEDs). SDH is a set of international fiber optic transmission standards. SDH was based on the North American SONET standards which now are considered to be a subset of SDH.

Wananchi Telecom uses these technologies to provision carrier grade services to Global Telcos, Regional, In-country operators as well as carrying its backhaul capacities to its main POPs.

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