What is sdh principal & working & frame structure?

Question

Accepted Answer

SDH (Synchronous Digital Hierarchy) is a standard for transmitting digital signals over optical fiber networks.

SDH is a hierarchical system that uses fixed-length frames to transmit data.
It uses a synchronous transmission method, where all devices are synchronized to a common clock signal.
The basic unit of SDH is STM-1 (Synchronous Transport Module level 1), which has a data rate of 155.52 Mbps.
The frame structure of SDH consists of a header, payload, and trailer.
The header contains information about the payload, such as its size and destination.
The payload contains the actual data being transmitted.
The trailer contains error correction codes and other control information.
SDH is widely used in telecommunications networks for high-speed data transmission.
It provides a reliable and efficient way to transmit large amounts of data over long distances.

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