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The A - Z of Telephone Accronyms

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S/I Signal to Interference Ratio
S/N Signal to Noise Ratio
S/PDIF Sony/Philips Digital Interface Format
S/P-DIF Sony/Philips Digital Interface
SAC Sales Advisory Committee of TBA
SAC Service Access Code
SAE Society of Automotive Engineers
SAG Screen Actors Guild
SAI Satellite Industry Association
SAN Satellite Access Node
Sans Equipment Serial Numbers
SAP Second Audio Program on TV subcarrier
SAR Specific Absorption Rate (for Radio Frequency Radiation)
SARP StandArds of Recommended Practice(s)
SAW Surface Acoustic Wave (type of electronic filter)
SAWA Screen Advertising World Association
SB Simultaneous Broadcast
SBA Small Business Administration
SBC Sub-Band Coding
SBC Standard Broadcast Calendar
SBCA Satellite Broadcasting & Communications Association
SBE Society of Broadcast Engineers
SBREFA Small Business Regulatory Enforcement Fairness Act
SBS Sound Broadcast Satellite
SC Same Channel (in broadcast band)
SCA Subsidiary Communications Authority
SCALS Software Continuous Acquisition and Lifecycle Support
proof Consortium
SCBA Small Cab le Business Association
SCFL Source-Coupled FET (Field-effect Transistor) Logic
SCG Screen Cartoonists Guild
SCMS Serial Copy Management System (CD & DAT anti-copy code)
SCORE Signal Communications bvy Orgiting Relay Equipment (Satellite)
SCP Service Control Point
SCPC Single Channel per Carrier
SCR Sustainable Cell Rate (data networks)
SCSI Small Computer System Interface
SCT Secretaria de Comunicaciones y Transportes (Mexico)
SCTE Society of Cable Television Engineers
SCTE Society of Cable Telecommunications Engineers
SCUC Satellite Communications Users Conference
SD Standard Deviation
SDARS Satellite Digital Audio Radio Service
SDH Synchronous Digital Hierarchy
SDID Secondary Data IDentification
SDL Specification and Description Language
SDMA Space/Spatial Division Multiple Access
SDO Standards Developing Organization
SDSB Satellite Digital Sound Broadcasting
SDTV Standard Definition Television (Digital TV)
SDV Switched Digital Video
SDX Sigma Delta Chi (journalism honor society)
SE Sound Effects (also see SFX)
SEAD Software Encryption Algorithm for Data Services
SEC Space Environment Center
SEC Securities
SECAM Sequential Coleur Aved Memoire (French/Russian
Color TV System
SECC State Emergency Communications Committee (for EBS)
SEDAT Spectrum Efficient Digital Audio Technology
SEG Screen Extras Guild
SEIA Solar Energy Industry Association
SEL Sound Exposure Level
SES Senior Executive Service (U.S. Government managers)
SESAC Society of European Songwriters Artists & Composers
SETI Search for Extra-Terrestrial Intelligence
SEWG Spectrum Engineering Working Group (of CEPT)
SFN Single Frequency Network (for Digital Sound Broadcasting)
SFX Sound Effects
SG Study Group (of the ITU Sectors)
SGA Songwriters Guild of America
SH Specified Hours (licensed hours of operation)
SHF Super High Frequency (3 Ghz to 30 GHz)
SHVA Satellite Home Viewer Act
SI Systems International (metric system units)
SI Service Information
SIA Storage Instantaneous Audimeter
SIA Satellite Industries Association
SID Sudden Ionospheric Disturbance (disrupts radio signals)
SID Source Identification Signal (in TV VBI)
SID Slew Induced Distortion (in audio equipment)
SIF Sound Intermediate Frequency
SINAD Signal + Noise + Distortion to Signal + Distortion Ratio
SIP Station Information Packet (used for audience surveys)
SIR Signal to Interference Ratio
SIS Sound in Sync (audio inserted in TV synchronization pulses)
SITOR SImplex Teleprinting Over Radio
SIU Sets in Use
SLC Schools & Libraries Corportion (formed by FCC)
SLC Subscriber Line Charge(s)
SLIP Serial Line Internet Protocol
SLL Sidelobe Level
SMA Special Market Area
SMA Spectrum Management Agency
SMATV Subscription Master Antenna Television
SMDPP SMS_Delivery_Point_to_Point
SME Short Message Entity
SMOG Sample Measure of Gobbledygood Grading
SMPAD Society of Motion Picture Art Directors
SMPTE Society of Motion Picture & Television Engineers
SMR Specialized Mobile Radio
SMSA Standard Metropolitan Statistical Area
SN Service Node
SNG Satellite News Gathering
SNMP Simple Network Management Protocol
SNOI Second Notice of Inquiry
SNR Signal to Noise Ratio
SNS Space Network System
SNV Satellite News Vehicle
SO Speech Option
SOA Summit of the Americas
SOF Sound on Film
SONET Synchronous Optical NETwork
SOT Sound on Tape
SP State Primary (for EAS Operations)
SPA Software Publishers Association
SPACE Society for Private & Commercial Earth Stations (now SBCA)
SPARS Society of Professional Audio Recording Services
SPASM Subscriber Parameter Administration Security Mechanism
SPC Service Programming Code
SPCS Satellite Personal Communication Service
SPD Spectral Power Density
SPDIF Sony-Philips Digital Interface (in digital audio equipment)
SPDT Single Pole - Single Double Throw (switch)
SPFD Spectral Power Flux Density
SPHH Standard Placement per Household
SPID Service Profile Identifier (ISDN circuit number)
SPIE Society of Photo-Optical Instrumentation Engineers
SPL Sound Pressure Level
SPLM Sound Pressure Level Meter
SPP Shock Proof Processor (used in digital CD & MD players)
SPPH Single Persons per Household
SPS Special (Weather) Statement (for EAS operations)
SPST Single Pole - Single Throw (switch)
SPTV Still Picture Television
SPW Signal Processing Workstation
SQAM Superposed Quadrature Amplitude Modulation
SR State Relay (for EAS operations)
SR Spectral Recording (noise reduction system by Dolby(tm))
SRA Station Representative Association Inc.
SRC Stereo Reception Control
SRD Short Range Device(s) (European term FCC Part 15 devices)
SRD Systems Requirements Documents
SRD Standards Requirements Document
SRDS Standard Rate & Data Service
SRM Standardized Reference Materials
SRMDB Spectrum Resource Management Database (at FCC)
SSC Sound Speed Converter/ing (used in digital recorders)
SSCQE Single Stimulus Continuous Quality Evaluation
SSD Shared Secret Data
SSFS Stereophonic Sound Film System
SSM Serial Storage Media (digital VTR, etc.)
SSMR Single Stimulus Multiple Repitition
SSN Smoothed Sunspot Number (For HF Propagation Predictions)
SSPA Solid State Power Amplifier
SSPI Society of Satellite Professionals International
SSPR System Selection for Preferred Roaming
SSSO Specialized Satellite Services Operator
SST Spred Spectrum Techology
SSTO Super-Sychronous Transfer Orbit (satellites)
SSTV Slow Scan Television
STA Special Temporary Authority
STAR Standards and Technology Annual Report (TIA publication)
STB Set-Top Box
STC Satellite Television Corp.
STG Study Task Group
STIC Subcarrier (FM broadcast) Traffic Information Channel
STL Studio Transmitter Link
STM-x Synchronous Transport Modules (SDH)
STP Shielded Twisted Pair
STS Subscription Television Service
STU-III Secure Telephone Unit version 3
STV Subscription Television
STV Satellite Television
STVA Subscription Television Association
SU Subscriber Unit
SVA Severe (Thunderstorm Warning) Advisory (for EAS operations)
SVA Stereo Variable Area (film sound system)
SVC Switched Virtual Circuit
SVF Simple Vector Format (used in computer documents)
S-VHS Super VHS (Video Home System)
SVI Standard Volume Indicator (VU Meter)
SVR Severe (Thunderstorm) Warning (for EAS operations)
SVRC Satellite Viewing Rights Coalition
SVS Severe (Weather) Statement (for EAS operations)
SW Short Wave (used for international broadcasting)
SWARC Satellite World Radio Conference
SWB Short Wave Broadcast (also HFB)
SWL Short Wave Listener

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