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Tele-Communication (Telecom) Terms Glossary and Dictionary
STM: Synchronous Transmission Module
Synchronous Transmission Module (STM), also known as Synchronous Transfer Mode, is the basic rate of transmission of the SDH ITU-T fiber optic network transmission standard. It has a bit rate of 155.52 Mbit/s and is the SDH equivalent of an OC-3 (SONET).
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