STS

1. 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. 2. 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 125µs, yielding raw bandwidth of 51.84 Mbps.The STS frame includes five elements: Synchronous Payload Envelope (SPE), Section Overhead (SOH), Line Overhead (LOH), Path Overhead

(POH), and Payload. See also bandwidth, frame, ITU-T, LOH, overhead, payload, POH, SDH, signaling and control, SOH, SONET, SPE, and T3.

• skywave
• SLA (Service Level Agreement)
• SLC
• SLC-96 (Subscriber Line Carrier-96)
• SLIP (Serial Line Internet Protocol)
• SLIP (Serial Line Internet Protocol)
• SLIP (Serial Line Internet Protocol)
• slotted Aloha
• small and medium enterprise (SME)
• small business enterprise (SBE)
• Small Computer System Interface (SCSI)
• small office/home office (SOHO)
• SMDR (Station Message Detail Record)
• SMDS (Switched Multimegabit Data Service)
• SME
• Smell-O-Vision
• SMF (Single-Mode Fiber)
• SMF (Single-Mode Fiber)
• S/MIME (Secure Multipurpose Internet Mail Extension)
• S/MIME (Secure Multipurpose Internet Mail Extension)
• SMR (Specialized Mobile Radio)
• SMS
• SMSC (Short Message Service Center)
• SMTP (Simple Mail Transfer Protocol)
• SNAFU (Situation Normal All Fouled Up)