SIST ETS 300 298-2 E2:2003

• Abstract:

  Additional definitions of ATM cell structure and header functions as w ell as ATM layer specifications necessary by revision of ITU-T I.361.

• 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 300 298-2 ed.2 (1996-10) - Broadband Integrated Services Digital Network (B-ISDN); Asynchronous Transfer Mode (ATM); Part 2: B-ISDN ATM layer specification [ITU-T Recommendation I.361 (1995)]

SIST ETS 300 298-2 E2:2003 is the Slovenian standard identical to ETS 300 298-2 Edition 2 for Broadband Integrated Services Digital Network (B-ISDN) Asynchronous Transfer Mode (ATM). It specifies the B-ISDN ATM layer, including additional definitions of ATM cell structure and header functions needed for the revision of ITU-T Recommendation I.361 (1995). It is aimed at people who design, implement, test, or verify B-ISDN/ATM equipment and interfaces.

What does SIST ETS 300 298-2 E2:2003 specify?

SIST ETS 300 298-2 E2:2003 specifies the B-ISDN ATM layer. The scope statement says it adds definitions of ATM cell structure and header functions, and the foreword shows that the ETS is organized as a two-part series.

Part	What it covers
Part 1	B-ISDN ATM functional characteristics [ITU-T Recommendation I.150 (1995)]
Part 2	B-ISDN ATM layer specification [ITU-T Recommendation I.361 (1995)]

For a reader, this means Part 2 is the document to use when the concern is how ATM cells and headers are specified at the layer level, while Part 1 covers the functional characteristics that sit alongside it.

What are the key requirements of SIST ETS 300 298-2 E2:2003?

SIST ETS 300 298-2 E2:2003 keeps the text of ITU-T Recommendation I.361 (1995) and, in the ETSI endorsement notice, that text is approved without modification. In practice, this means implementers can align directly with the international wording rather than a rewritten national version.

• Preassigned combination of the routing field in the cell header - The foreword notes a new specification for this header combination. In practice, equipment must interpret or generate the cell header using the revised routing-field arrangement.
• Reserved VCI value handling - The standard specifies how a cell with a reserved Virtual Channel Identifier (VCI) value is conveyed between the endpoints of a Virtual Path Connection (VPC). In practice, this matters wherever special cells must pass through a VPC without being misrouted or treated as ordinary traffic.
• Generic Flow Control (GFC) procedures - The standard specifies GFC protocol procedures across the interface at the S and T reference points. In practice, this affects how devices control access or flow behavior at those interfaces.
• ATM cell structure and header functions - The scope says the document adds definitions in these areas. In practice, this is the part engineers use when checking whether a device builds and interprets ATM cells correctly.
• Relationship to the revised I.361 - The scope ties the specification to a revision of ITU-T I.361. In practice, users should treat this as the reference text for the B-ISDN ATM layer identified by that recommendation.
• Two-part structure - Part 1 and Part 2 are presented as one ETS series. In practice, buyers and quality teams often need both parts together when specifying or verifying B-ISDN/ATM behavior.

What terms does SIST ETS 300 298-2 E2:2003 define?

• Broadband Integrated Services Digital Network (B-ISDN) - The broadband integrated services digital network framework in which the ATM layer is defined.
• Asynchronous Transfer Mode (ATM) - The transfer mode used by this standard for B-ISDN cell-based transport.
• Virtual Path Connection (VPC) - The path-level connection mentioned in the note about conveying cells with a reserved VCI value.
• Virtual Channel Identifier (VCI) - The identifier in the ATM cell header that the foreword highlights as having a reserved value case.
• Generic Flow Control (GFC) - The control procedure named for the S and T reference points.
• S and T reference points - The interfaces across which the GFC protocol procedures are specified.

Who uses SIST ETS 300 298-2 E2:2003?

Telecommunications engineers use SIST ETS 300 298-2 E2:2003 when designing or integrating B-ISDN/ATM equipment. Network operators and equipment vendors use it when defining how cells, headers, and control procedures must behave at interfaces.

Quality managers and testers use it to verify ATM layer behavior against a known specification, especially for header handling, reserved VCI traffic, and GFC procedures. Buyers and procurement teams use it when they need a precise technical reference for B-ISDN/ATM conformance.

What changed in SIST ETS 300 298-2 E2:2003 from the previous edition?

Compared with edition 1 of ETS 300 298-1 and ETS 300 298-2, this edition introduces three stated changes:

• a new specification of the preassigned combination of the routing field in the cell header
• a specification for how a cell with a reserved VCI value is conveyed between the endpoints of the VPC
• specification of the GFC protocol procedures across the S and T reference points

Which standards are used with SIST ETS 300 298-2 E2:2003?

Standard	What it contributes
ITU-T Recommendation I.361 (1995)	The underlying B-ISDN ATM layer specification that this ETS endorses without modification
ITU-T Recommendation I.150 (1995)	The functional characteristics for Part 1 of the ETS series
ETS 300 298-1	The companion Part 1 of the same ETS series, covering B-ISDN ATM functional characteristics

These references matter because Part 2 is tied to the ITU-T text, while Part 1 provides the companion functional view of the same ATM framework.

What does the SIST ETS 300 298-2 E2:2003 document contain?

SIST ETS 300 298-2 E2:2003 contains the ETSI foreword, the endorsement notice, the transposition dates, and the document history, together with the text of ITU-T Recommendation I.361 (1995) as approved by ETSI. The foreword records that the ETS consists of two parts and identifies what each part covers.

The document also records that it is the second edition and notes the specific revisions made relative to edition 1. For users, that means the document is not just a title page reference - it is the formal standard text to consult when checking B-ISDN ATM layer behavior, header handling, and the procedures named in the foreword.

SLOVENSKI STANDARD
01-december-2003
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Broadband Integrated Services Digital Network (B-ISDN); Asynchronous Transfer Mode
(ATM); Part 2: B-ISDN ATM layer specification [ITU-T Recommendation I.361 (1995)]
Ta slovenski standard je istoveten z: ETS 300 298-2 Edition 2
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 300 298-2
TELECOMMUNICATION October 1996
STANDARD Second Edition
Source: ETSI TC-NA Reference: RE/NA-052811
ICS: 33.020
Key words: ATM, B-ISDN
Broadband Integrated Services Digital Network (B-ISDN);
Asynchronous Transfer Mode (ATM);
Part 2: B-ISDN ATM layer specification
[ITU-T Recommendation I.361 (1995)]
ETSI
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© European Telecommunications Standards Institute 1996. All rights reserved.

Page 2
ETS 300 298-2: October 1996
Foreword
This European Telecommunication Standard (ETS) has been produced by the Network Aspects (NA)
Technical Committee o
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