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S

S/I       Signal to Influence
SA        Sensitivity Analysis
SAA       Systems Application Architecture
SACCH     Slow Associated Control CHannel (GSM)
SAGE      Security Algorithms Group of Experts (ETSI)
SAML      Security Assertions Markup Language
SAP       Service Access Point
SAPI      Service Access Point Identifier (LAPD)
SAR       Segmentation And Reassembly
SAR       Specific Absorption Rate
SAS       Single Attachment Station (FDDI)
SBC       Sub-Band Coding
SBCCI     Southern Building Code Congress International
SBS       Stimulated Billouin Scattering
SC        Standards Committee
SC        Subscriber Channel (fiber optics)
SCCP      Signalling Connection Control Part (SS7)
SCCS      Switching Center Control System
SCE       Service Creation Environment
SCF       Service Control Function
SCH       Synchronization CHannel (GSM)
SCM       Satellite Connection Manager
SCP       Service Control Point (SS7)
SCPC      Single-Channel-Per-Carrier - una tecnica di accesso multiplo FDMA
SCR       Sustainable Cell Rate (ATM)
SCS-1     Signaling Capability Set 1
ScTP      Screened Twisted Pair
SD        Super Density
SDCCH     Stand-alone Dedicated Control CHannel (GSM)
SDH       Synchronous Digital Hierarchy
SDLC      Synchronous Data Link Control
SDMA      Spatial Division Multiple Access
SDL       Stadio Di Linea (Telecom Italia)
SDN       Software-Defined Network
SDT       Stadio di Transito (Telecom Italia)
SDU       Service Data Unit
SEPP      Secure Electronic Payment Protocol
SES       Severely Errored Second
SES       Severely Error Seconds
SF        Super Frame
SFD       Start of Frame Delimiter (Ethernet)
SFN       Single Frequency Network
SG        Study Group
SGML      Standard Generalized Markup Language 
SGMP      Simple Gateway Management Protocol
SGU       Stadio di Gruppo Urbano (Telecom Italia)
S-HTTP    Secure Hypertext Transfer Protocol
SIB       Service Independent Building block
SIM       Subscriber Identity Module (GSM)
SINAD     SIgnal-to-Noise And Distortion
SIP       Società Italiana Per l'esercizio delle telecomunicazioni
SIP       Session Initiation Protocol (RFC 2543)
SIP       Signalling Information Protocol
SIR       Signal to InterfeRence
SL        Service Logic
SLA       Semiconductor Laser Amplifier
SLEE      Service Logic Execution Environment
SLID      Subscriber Location IDentifier
SLIP      Serial Lines Internet Protocol
SLP       Service Logic Program
SM        Single Mode
SMA       Sub Miniature Assembly
SMATV     Satellite Master Antenna TV
SMDI      Simplified Message Desk Interface
SMDR      Station Message Detail Recording
SMDS      Switched Multimegabit Data Service
SM-DS     Single-Mode Dispersion Shifted (ITU-T G.653)
SMG       Special Mobile Group (GSM)
SMI       Structure of Management Information (RFC 1155)
SML       Service Management Layer
SMPP      Short Message Peer-to-Peer (GSM)
SMPP/P    Short Message Peer-to-Peer Provisioning (GSM)
SMR       Specialised Mobile Radio
SMR       Single-Mode Reduced (ITU-T G.652)
SMS       Service Management System
SMS       Short Message Service (GSM)
SMSC      Short Message Service Centre(GSM)
SMSL      Standard Multimedia Scripting Language
SMT       Station ManagemenT (FDDI)
SMTP      Simple Mail Transfer Protocol (IP suite)
SNA       Systems Network Architecture
SNM       Subscriber Network Master
SNMP      Simple Network Management Protocol (IP suite - RFC 1157)
SNR       Signal-to-Noise Ratio
SNW       Subscriber NetWork
SOA       Start Of Authority (DNS)
SOA       Service Oriented Architecture
SOAP      Simple Object Access Protocol
SOHO      Small Office / Home Office environment
SONET     Synchronous Optical NETwork
SOP       State of Polarization
SP        Static Priority
SPADE     SCPC PCM multiple Access Demand Assignment Equipment
SPC       Stored Program Control
S-PCS     Satellite Personal Communication Service
SPID      Service Profile IDentifier
SPO       Sales Prevention Organization
SPS       Shift Phase Modulation
SPU       Subscriber Premises Unit
SQE       Signal Quality Error (Ethernet)
SQL       Structured Query Language
SRB       Source Routing Bridging (Token Ring)
SRDF      Symmetrix Remote Data Facility
SRNET     Satellite Relay Network
SRS       Stimulated Raman Scattering
SRT       Source Routing Transparent (Token Ring)
SS        Spread Spectrum
SS/TDMA   Satellite-Switched TDMA
SS7       Signalling System no. 7 (v. CCSS7) usato nell'ISDN
SSB       Single-Side Band
SSB-SC    Single Side Band - Suppressed Carrier
SSF       Service Switching Function
SSL       Secure Socket Layer
SSMA      Spread Spectrum Multiple Access
SSP       Service Switching Point (SS7)
ST        Straight Tip (fiber optics)
STDM      Statistical Time Division Multiplexing
STEN      Scientific Trans-European Network
STIR      Science and Technology International of Russia
STM       Synchronous Transfer Mode
STM-1,4,16   Synchronous Transport Module level-1,4,16 (SDH)
STMP      State Telecommunications Modernization Plan
STMP      Simple Mail Transfer Protocol (parte del TCP/IP)
STP       Shielded Twisted Pair
STP       Service Transfer Point (SS7)
STS       Satellite Transport Service
STT       Set-Top Terminal
SU        Subscriber Unit
SU        Switching Unit
SVC       Switched Virtual Circuit
SVDN      Switched Video Digital Network
SWAP      System Wide Area Paging

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