SIST ETS 300 374-5:1998

SIST ETS 300 374-5:1998 is the Slovenian adoption of ETS 300 374-5 Edition 1 from ETSI. It specifies the Intelligent Network Application Protocol (INAP) on the Service Control Function (SCF) - Service Data Function (SDF) interface for Intelligent Network Capability Set 1 (CS1). The document is intended for implementors and network operators who need SCF-SDF interworking between equipment from different manufacturers.

What does SIST ETS 300 374-5:1998 specify?

SIST ETS 300 374-5:1998 defines the CS1 extension of core INAP for communication between the SCF and the SDF. In practice, it tells implementors how this interface is handled so that different vendors' systems can exchange IN-related information in a consistent way.

The standard is organized into eight clauses:

• Clause 1 - Scope
• Clause 2 - Normative references
• Clause 3 - Abbreviations
• Clause 4 - Segmentation and re-assembly of INAP messages
• Clause 5 - IN X.500 directory access protocol subset
• Clause 6 - SCF and SDF Finite State Machines (FSMs)
• Clause 7 - SDF operations and errors
• Clause 8 - SDL diagrams for SCF and SDF FSMs

Its scope is narrow and practical: it supports interactions between the SCF and the SDF within Intelligent Network (IN) CS1, and it complements ETS 300 374-1.

What are the key requirements of SIST ETS 300 374-5:1998?

SIST ETS 300 374-5:1998 focuses on how the SCF-SDF interface behaves, which protocol pieces are reused from other standards, and how the state machines and error handling are aligned. The most useful points for implementation are below.

• Clause 4 - Segmentation and re-assembly of INAP messages
  When an INAP message is too long for one transfer, the standard says to use the SCCP connectionless segmentation and re-assembly procedure from ETS 300 009-1. This matters because message handling must follow the same method on both ends to avoid failed exchanges.

• Clause 5 - IN X.500 directory access protocol subset
  The standard endorses the Q.1218 text for the IN X.500 directory access protocol subset, while replacing several references to the ITU-T Q.771 to Q.775 series with ETS 300 287-1. This matters because the interface is tied to the Transaction Capabilities (TC) version used in the ETSI environment.

• Clause 6 - SCF and SDF FSMs
  The SCF and SDF Finite State Machines are taken from Q.1218 with reference updates to ETS 300 287-1 and ETS 300 009-1. For implementors, this is the part that aligns protocol behavior with the transaction and SCCP layers used underneath.

• Clause 7 - SDF operations and errors
  The standard endorses selected Q.1218 subclauses covering SDF operations and errors. In practice, this is the part to check when defining what the SDF can do and how error cases are reported back to the SCF.

• Clause 8 - SDL diagrams for SCF and SDF FSMs
  The SDL diagrams from annex B of Q.1218 are endorsed here. These diagrams are useful when turning the text into executable design, test cases, or protocol validation checks.

• Relationship to ETS 300 374-1
  The document extends the core INAP defined in ETS 300 374-1. That means readers usually use it together with the base protocol specification, not on its own.

What terms does SIST ETS 300 374-5:1998 define?

• Capability Set 1 (CS1) - The first IN capability set covered by the core INAP series.
• Functional Entity (FE) - A logical network function used in the IN functional model.
• Finite State Machine (FSM) - A formal state-based description of protocol behavior.
• Intelligent Network (IN) - The telecom architecture this protocol supports.
• Intelligent Network Application Protocol (INAP) - The protocol family used for IN service interactions.
• Service Control Function (SCF) - The function that controls service logic in the IN model.
• Service Data Function (SDF) - The function that provides service data to the SCF.
• Specification and Description Language (SDL) - The language used for the protocol diagrams.

Who uses SIST ETS 300 374-5:1998?

SIST ETS 300 374-5:1998 is used by protocol implementors, telecom equipment manufacturers, and network operators working with IN CS1. It is relevant when designing or integrating SCF and SDF components, checking interworking between vendors, and validating protocol behavior on the SCF-SDF interface.

What changed in SIST ETS 300 374-5:1998 from the previous edition?

SIST ETS 300 374-5:1998 is identical to ETS 300 374-5 Edition 1. The document history identifies it as the first edition.

Which standards are used with SIST ETS 300 374-5:1998?

• ITU-T Recommendation Q.1218 - Provides the base text that this part endorses and adapts for the SCF-SDF interface.
• ETS 300 009-1 - Supplies the SCCP connectionless segmentation and re-assembly procedure used for long INAP messages.
• ETS 300 287-1 - Provides the Transaction Capabilities (TC) version 2 references that replace the older ITU-T Q.771 to Q.775 references in this part.
• ETS 300 374-1 - Gives the core INAP protocol that this part extends.

What does the SIST ETS 300 374-5:1998 document contain?

The document contains the scope, reference list, abbreviations, and the technical clauses that adapt Q.1218 for the SCF-SDF interface. It describes message segmentation and re-assembly, the IN X.500 directory access protocol subset, the SCF and SDF FSMs, and SDF operations and errors. It also endorses the SDL diagrams from annex B of Q.1218, which are useful for design and protocol testing. The content is structured so that implementors can map the text to behavior, states, and error handling in interoperable CS1 systems.