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