Question

Explain synchronous transmission s mode (stm) and discuss its hierarchical features in relation to sonet and sdh optical network.

Answer 1

Answer:

SONET has a base transmission rate of 51.84Mbit/s with speeds up to 2488.32Mbit/s. STM stands for Synchronous Transport Module. STM-1 is the base signal of the Synchronous Digital Hierarchy (SDH) protocol. ... SDH has a lowest bit rate of 155.52 Mbps which is three times that of the lowest bit rate of SONET..

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