mobile technology glossary

Here are the results for the letter s

S-CDMA

Synchronous CDMA (see CDMA)

SACCH

Slow Associated Control Channel; transmits continuous measurements in parallel with operation of TCH or SDCCH; needed for handover decisions

SAR

Specific Absorption Rate

SB

Synchronisation Burst; used for time synchronisation of the mobile

SCH

Synchronisation Channel; downlink only frame synchronisation and identification of base station

SCP

Switching/Service Control Point

SDCCH

Stand-alone Dedicated Control Channel; communications channel between the MS and the BTS. Used for signalling during call set-up before a TCH is allocated

SDLC

Synchronous Data Link Control

SDMA

Spatial Division Multiple Access

SGSN

Serving GPRS Support Node; the gateway between the RNC and the core network in a GPRS/UMTS network

SIM

Subscriber Identity Module; A smart card containing the telephone number of the subscriber, encoded network identification details, the PIN and other user data such as the phone book. A user?s SIM card can be moved from phone to phone as it contains all the key information required to activate the phone

Smartphone

a combination of mobile phone and personal digital assistant

SMR

Specialised Mobile Radio; the US term for private mobile radio (See PMR)

SMS

Short Message Service; a text message service which enables users to send short messages (160 characters) to other users. A very popular service, particularly amongst young people, with 400 billion SMS messages sent worldwide in 2002

SMS-MO

SMS Mobile Originated

SMS-MT

SMS Mobile Terminated

SMS-PP

SMS Point to Point

SMSC

SMS Centre-the network entity which switches SMS traffic

SMSCB

SMS Cell Broadcast

SND

Send; The key on a cellular phone which initiates a call or answers an incoming call

SoHo

Small Office/Home Office

SP

Service Provider

Speed dialling

See One-touch dialling

SQAM

Staggered Quadrature Amplitude Modulation

SQPSK

Staggered Quadrature Phase Shift Keying

SS

Supplementary Service Support; handles special services

SS7

Signalling System Number 7 (See CCS7)

SSP

Service Switching Point

Standby time

The length of time a battery can power a mobile phone when it is switched on but not making or receiving calls

STK

SIM ToolKit: specified within the GSM standard, this allows operators to add additional functions to the phone menu in order to provide new services such as mobile banking or email

STM

Synchronous Transfer Mode

Streaming

An Internet derived expression for the one-way transmission of video and audio content

Symbian

A company created by Psion, Nokia, Ericsson and Motorola in 1998 with the aim of developing and standardising an operating system which enable mobile phones from different manufacturers to exchange information The operating system is known as EPOC. Matsushita has subsequently joined Symbian