SIST ETS 300 643 E1:2003

• Abstract:

  Development of an ETS for the SSCF required on top of of the protocol specified in Q.2110 (SSCOP) to provide the layer service specified in X.214 (COTS) on the basis of the corresponding results in ITU-T, SG 13, Q 6.

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI ETS 300 643 ed.1 (1996-05) - Integrated Services Digital Network (ISDN); Overall network aspects and functions; Frame Relaying Service Specific Convergence Sublayer (FR-SSCS) [ITU-T Recommendation I.365.1 (1993)]

SIST ETS 300 643 E1:2003 is the Slovenian adoption of ETS 300 643 Edition 1, a European Telecommunications Standard from ETSI. It specifies the Frame Relaying Service Specific Convergence Sublayer (FR-SSCS) for Integrated Services Digital Network (ISDN), defining the adaptation used on top of SSCOP to support the COTS layer service. It is written for organizations that design, implement, test, or procure ISDN, ATM, and frame relay protocol stacks.

What does SIST ETS 300 643 E1:2003 specify?

SIST ETS 300 643 E1:2003 specifies the FR-SSCS for ISDN and places it above SSCOP so that the required layer service can be provided. In practical terms, the standard tells implementers how the frame-relay-related convergence sublayer fits into the protocol stack.

The scope links the ETS to the work done in ITU-T Study Group 13, Question 6, and says the ETS was developed from those corresponding results. The ETSI foreword states that the text of ITU-T Recommendation I.365.1 (1993) was approved as an ETS without modification, so the European text follows the ITU-T recommendation directly.

The published standard includes:

• the ETSI foreword
• an endorsement notice
• transposition dates
• a history page

What are the key requirements of SIST ETS 300 643 E1:2003?

SIST ETS 300 643 E1:2003 is mainly a defining and alignment document. Its key point is the relationship between FR-SSCS, SSCOP, and the layer service named in X.214.

FR-SSCS is the specified convergence sublayer

SIST ETS 300 643 E1:2003 defines FR-SSCS as the service-specific convergence sublayer for frame relaying in ISDN. That matters because it identifies the protocol function that adapts higher-layer service needs to the lower protocol environment.

SSCOP is the underlying protocol

SIST ETS 300 643 E1:2003 says FR-SSCS is required on top of the protocol specified in Q.2110, identified as SSCOP. For implementers, this means the standard is not a standalone protocol - it is designed to sit above SSCOP in the stack.

The target service is the X.214 layer service

SIST ETS 300 643 E1:2003 is intended to provide the layer service specified in X.214, named COTS in the standard. In practice, this tells designers what service behavior the convergence layer has to support.

The ETS mirrors the ITU-T text

SIST ETS 300 643 E1:2003 reproduces ITU-T Recommendation I.365.1 (1993) without modification. That is important for conformity work because the ETSI version and the ITU-T recommendation are the same technical text.

The document is tied to ETSI network aspects work

SIST ETS 300 643 E1:2003 was produced by ETSI's Network Aspects Technical Committee. For readers, that signals that the document belongs to telecom network architecture and protocol standardization rather than to a product-specific or test-only standard.

The transposition dates define the implementation timeline

SIST ETS 300 643 E1:2003 includes the adoption and transposition dates for national implementation. Buyers and compliance teams use those dates to understand when the standard became available for national adoption in ETSI member contexts.

What terms does SIST ETS 300 643 E1:2003 define?

• FR-SSCS - Frame Relaying Service Specific Convergence Sublayer, the protocol layer defined by this standard.
• SSCOP - the protocol specified in Q.2110 that FR-SSCS sits on top of.
• SSCF - the service-specific convergence function referred to in the scope as needing an ETS.
• COTS - the layer service specified in X.214 and targeted by FR-SSCS.
• ISDN - Integrated Services Digital Network, the application area named in the title.
• ETSI - the European Telecommunications Standards Institute, which produced the ETS.
• ITU-T - the International Telecommunication Union Telecommunication Standardization Sector, whose recommendation was adopted.

Who uses SIST ETS 300 643 E1:2003?

SIST ETS 300 643 E1:2003 is used by telecom engineers, protocol-stack designers, and equipment vendors working on ISDN, ATM, and frame relay systems. It is also relevant to quality managers and procurement teams who need to check that a product's protocol layer matches the expected ETSI and ITU-T wording. Test and conformance teams use it to understand where FR-SSCS sits in the stack and which underlying and service-level standards it connects to.

What changed in SIST ETS 300 643 E1:2003 from the previous edition?

SIST ETS 300 643 E1:2003 is the Slovenian standard identical to ETS 300 643 Edition 1. The ETSI foreword states that ITU-T Recommendation I.365.1 (1993) was approved as an ETS without modification.

Which standards are used with SIST ETS 300 643 E1:2003?

SIST ETS 300 643 E1:2003 is used with Q.2110, which specifies SSCOP, because FR-SSCS sits on top of that protocol. It is also used with X.214, which names the COTS layer service that FR-SSCS is intended to provide. The scope also points to the work of ITU-T Study Group 13, Question 6, as the technical basis for the ETS.

What does the SIST ETS 300 643 E1:2003 document contain?

SIST ETS 300 643 E1:2003 contains the ETSI title pages, the foreword, the endorsement notice, the transposition dates, and the history page, together with the technical text adopted from ITU-T Recommendation I.365.1 (1993). The front matter shows the document's origin in ETSI Network Aspects work and its relationship to the ITU-T recommendation. For implementation work, the useful content is the definition of FR-SSCS and its position between SSCOP and the X.214 service.

SLOVENSKI STANDARD
01-december-2003
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Integrated Services Digital Network (ISDN); Overall network aspects and functions;
Frame Relaying Service Specific Convergence Sublayer (FR-SSCS) [ITU-T
Recommendation I.365.1 (1993)]
Ta slovenski standard je istoveten z: ETS 300 643 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 643
TELECOMMUNICATION May 1996
STANDARD
Source: ETSI TC-NA Reference: DE/NA-052623
ICS: 33.040
ATM, ISDN, frame relay
Key words:
Integrated Services Digital Network (ISDN);
Overall network aspects and functions;
Frame Relaying Service Specific Convergence Sublayer
(FR-SSCS)
[ITU-T Recommendation I.365.1 (1993)]
ETSI
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