S interfaceFor basic rate access in an ISDN (Integrated Services Digital Network) environment, a user to network interface reference point that is characterized ... View more
S-BandThe frequency spectrum near 2GHz used for land based microwave and some mobile satellite communications. ... View more
S-CCPCH - Secondary Common Control Physical ChannelThe Secondary Common Control Physical Channel is used to carry the FACH (Forward Access Channel) and PCH (Paging Channel) in the UMTS system. ... View more
S-CSCF - Serving – Call Session Control FunctionThe S-CSCF is the primary node in the IMS responsible for session control. Subscribers will be allocated a S-CSCF for the duration of their IMS regist... View more
S-GW - Serving GatewayThe S-GW is the user data plane ingress and egress point of the E-UTRAN side of the EPC. As such, when the subscriber moves around the E-UTRAN, their ... View more
S-NSSAI - Single – Network Slice Selection Assistance InformationUsed in support of Network Slicing, the S-NSSAI is used to uniquely identify a Network Slice. The S-NSSAI contains two components: the SST (Slice/Serv... View more
S-RNTI - Serving RNC Radio Network Temporary IdentifierIn UMTS the S-RNTI is the UE (User Equipment) identifier which is allocated by the Serving RNC (Radio Network Controller) and is unique within that SR... View more
S-SCH - Secondary Synchronised ChannelUMTS uses the P-SCH (Primary Synchronization Channel) and S-SCH (Secondary Synchronization Channel) to inform the mobiles of the current cells timing ... View more
S-TMSI - Serving Temporary Mobile Subscriber IdentityThe S-TMSI is similar in format to the P-TMSI. It is used to protect the subscribers IMSI during NAS interaction as well as identifying the MME (Mobil... View more
S/MIME - Secure Multipurpose Internet Mail ExtensionsS/MIME (Secure / Multipurpose Internet Mail Extensions) is a standard specification for secure e-mail within a PKI (Public Key Infrastructure), helpin... View more
S/P - Supplementary/PollingUsed in some Layer 2 protocols to indicated when a response is required. ... View more
S1AP - S1 Application ProtocolS1AP is used between the eNB and the MME in order to support operations such as E-RAB (E-UTRAN Radio Access Bearer) Management, transfer of UE Context... View more
SA - Security AssociationA SA (Security Association) is the title given to the secure relationship between two network entities, often as part of the IPSec security architectu... View more
SA - Service AreaA Service Area consists of one or more cells within a given LA (Location Area) and may be used to assist in the delivery of location based services. ... View more
SA NR - Standalone New RadioA 3GPP 5G deployment configuration where the 5G gNB (Next Generation Node B) connects to the NGC (Next Generation Core).... View more
SAAL - ATM Adaptation Layer for SignallingIn ATM (Asynchronous Transfer Mode), the SAAL (ATM Adaptation Layer for Signalling) provides reliable transport of signalling messages between peer en... View more
SABM - Set Asynchronous Balanced ModeFor systems that work in the ABM (Asynchronous Balanced Mode). This mode is totally balanced, meaning there is no master/slave relationship. Each stat... View more
SAC - Service Area CodeThe Service Area Code is a fixed length code of 2 octets used to identify a SA (Service Area) within a LA (Location Area). ... View more
SACCH - Slow Associated Control ChannelA GSM signalling channel that provides a relatively slow signalling connection. The SACCH is associated with either a traffic or dedicated channel. Th... View more
SACK - Selective AcknowledgementIt is an extension to a protocol which allows the acknowledge reception of specific packets or messages. ... View more