STS

STS Telecom Definition

Speech-To-Speech. A Telecommunications Relay Service (TRS) offering that enables a person with a speech disability to use his or her own voice to speak to the called party through a call administrator (CA) specially trained to understand speech affected by a variety of disorders.The CA acts as a facilitator, repeating the spoken words in a clear and understandable manner. See also TRS.
Synchronous Transport Signal.The electrical equivalent of the Synchronous Optical Network (SONET) optical signal, according to North American standards. The STS is known as Synchronous Transport Module (STM) in Synchronous Digital Hierarchy (SDH) terminology, according to ITU-T international standards.The signal begins in electrical format as a T3 signal plus SONET/SDH signaling and control overhead, and converts to optical format for transmission over the SONET optical fiber facilities. Each STS-1 frame is transmitted in 125

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