name: USTS
full_form: Uplink synchronous transmission scheme
context: In SS7 both MTP-3 and SCCP have several national variants (ETSI, ANSI, China, etc.) that are incompatible with each other. In addition to national variants there is the international version of both protocols (ITU-T) to enable worldwide connectivity between national SS7 networks. As a conclusion, in SS7 networks whenever there is a need for connectivity between different countries or between different operators' networks, the application of a Signalling Gateway is a necessity. This applies both for MTP-3 and for SCCP. Here the Signalling Gateway is a Signalling Point that has an interface to all SS7 networks that are to be connected through it. Figure 6-20: Global SS7 networking The use of SCCP on top of M3UA makes the availability of a Signalling Gateway a must also in SCCP/M3UA networks. Only in SUA-only environment there is no need for interworking within the signalling network itself. This is for the reason that neither MTP-3 nor SCCP are present there.
description: The Uplink Synchronous Transmission Scheme (USTS) is a protocol used in the Iur Interface to support synchronous transmission in uplink. It involves the exchange of specific indicators and codes between the SRNC and DRNC, such as the USTS indicator, USTS Support Indicator, USTS Scrambling Code, and USTS Scrambling Code Offset, to enable or disable USTS mode for a UE.
explanation: USTS is classified as a Protocol because it defines the rules for uplink synchronous transmission between network nodes (SRNC and DRNC) in the Iur Interface. The context highlights the specific messages and indicators used to support USTS, indicating that it is a set of rules governing data transmission.
section_title: 7.2.2.2	Iur Interface
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biotag_Description: O,B-Connection,O,O,O,O,O,O,O,O,O,O,O,B-Interface,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,B-Protocol,O,B-Protocol,O,O,B-Protocol,O,O,O,B-Protocol,O,O,O,O,O,O,O,B-Protocol,O,O,O,O