SIST ETS 300 324-8 E1:2003

V interfaces at the digital Local Exchange (LE); V5.1 interface for the support of Access Network (AN); Part 8: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the data link layer

Abstract Test Suite specification (ATS in TTCN) and protocol implementation extra information for testing (PIXIT) proforma V5.1 interface for support of Access Network; 2048 kBit/s interface without concentration capability within the Access Network

Vmesniki V pri digitalnih krajevnih centralah (LE) – Vmesnik V5.1 za podporo dostopovnemu omrežju (AN) – 8. del: Abstraktni preskušalni niz (ATS) in dodatna informacija za preskušanje delne izvedbe protokola (PIXIT) – Proforma specifikacija za podatkovno povezovalno plast

General Information

• Status: Published
• Publication Date: 30-Nov-2003
• Withdrawal Date: 30-Sep-1998
• ICS: 33.040.30 - Switching and signalling systems
• 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
• Mandate: BC-T-340
• Ref Project: ETSI ETS 300 324-8 ed.1 (1999-04) - V interfaces at the digital Local Exchange (LE); V5.1 interface for the support of Access Network (AN); Part 8: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the data link layer

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 324-8 E1:
01-RNWREHU-
Vmesniki V pri digitalnih krajevnih centralah (LE) – Vmesnik V5.1 za podporo
dostopovnemu omrežju (AN) – 8. del: Abstraktni preskušalni niz (ATS) in dodatna
informacija za preskušanje delne izvedbe protokola (PIXIT) – Proforma
specifikacija za podatkovno povezovalno plast
V interfaces at the digital Local Exchange (LE); V5.1 interface for the support of Access
Network (AN); Part 8: Abstract Test Suite (ATS) and partial Protocol Implementation
eXtra Information for Testing (PIXIT) proforma specification for the data link layer
Ta slovenski standard je istoveten z: ETS 300 324-8 E1
ICS:
33.040.30 Komutacijski in signalizacijski Switching and signalling
sistem systems
SIST ETS 300 324-8 E1: en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST ETS 300 324-8 E1:2003

---------------------- Page: 2 ----------------------

SIST ETS 300 324-8 E1:2003
DRAFT
EUROPEAN pr ETS 300 324-8
TELECOMMUNICATION December 1997
STANDARD
Source: SPS Reference: DE/SPS-03003.3-7
ICS: 33.020
Key words: V interface, V5 interface, AN, ATS, ISDN, layer 2, LE, PIXIT, PSTN, testing
Signalling Protocols and Switching (SPS);
V interfaces at the digital Local Exchange (LE);
V5.1 interface for the support of Access Network (AN);
Part 8: Abstract Test Suite (ATS) and partial Protocol
Implementation eXtra Information for Testing (PIXIT) proforma
specification for the data link layer
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1997. All rights reserved.

---------------------- Page: 3 ----------------------

SIST ETS 300 324-8 E1:2003
Page 2
Draft prETS 300 324-8: December 1997
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

---------------------- Page: 4 ----------------------

SIST ETS 300 324-8 E1:2003
Page 3
Draft prETS 300 324-8: December 1997
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions and abbreviations .8
3.1 Definitions .8
3.2 Abbreviations .8
4 Abstract test method .9
4.1 ATM .9
4.2 DLL protocol testing.9
4.3 Execution of test cases.10
4.3.1 AN-LE testing .10
4.3.2 Handling of error indications.10
4.3.3 Test case execution sequence.10
5 Untestable test purposes.11
6 Abstract test suite conventions.11
6.1 Naming conventions .11
6.1.1 Declaration part .11
6.1.2 Constraint part.12
6.1.3 Dynamic part .12
6.1.3.1 Test cases .12
6.1.3.2 Test steps .12
6.1.3.3 General aspects .13
6.1.4 ATS abbreviations .13
6.2 Implementation conventions .13
6.2.1 Declaration part .13
6.2.2 Constraint part.14
6.2.3 Dynamic part .14
6.2.4 Documentation: .15
Annex A (normative): Abstract test suite for DLL testing .16
A.1 The TTCN Graphical form (TTCN.GR) .16
A.2 The TTCN Machine Processable form (TTCN.MP) .16
Annex B (normative): Partial PIXIT proforma.17
B.1 Introduction.17
B.2 PIXIT proforma.17
B.2.1 Identification summary.17
B.2.2 Abstract test suite summary .17
B.2.3 Test laboratory.17
B.2.4 Client.17
B.2.5 SUT.17
B.2.6 Protocol layer information .17
B.2.6.1 Protocol identification .17
B.2.6.2 IUT information.18

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SIST ETS 300 324-8 E1:2003
Page 4
Draft prETS 300 324-8: December 1997
Annex C (informative): Bibliography . 20
History. 21

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SIST ETS 300 324-8 E1:2003
Page 5
Draft prETS 300 324-8: December 1997
Foreword
This draft European Telecommunication Standard (ETS) has been produced by the Signalling Protocol
and Switching (SPS) Technical Committee of the European Telecommunications Standards Institute
(ETSI), and is now submitted for the Public Enquiry phase of the ETSI standards approval procedure.
This ETS is part 8 of a multi-part standard covering the V5.1 interface as described below:
Part 1: "V5.1 interface specification";
Part 2: "Protocol Implementation Conformance Statement (PICS) proforma";
Part 3: "Test Suite Structure and Test Purposes (TSS&TP) specification for the network layer (AN
side)";
Part 4: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing
(PIXIT) proforma specification for the network layer (AN side)";
Part 5: "Test Suite Structure and Test Purposes (TSS&TP) specification for the network layer (LE
side)";
Part 6: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing
(PIXIT) proforma specification for the network layer (LE side)";
Part 7: "Test Suite Structure and Test Purposes (TSS&TP) specification for the data link layer";
Part 8: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for
Testing (PIXIT) proforma specification for the data link layer";
Part 9: "Test specification for the physical layer".
Proposed transposition dates
Date of latest announcement of this ETS (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

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SIST ETS 300 324-8 E1:2003
Page 6
Draft prETS 300 324-8: December 1997
Blank page

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SIST ETS 300 324-8 E1:2003
Page 7
Draft prETS 300 324-8: December 1997
1 Scope
This eighth part of ETS 300 324 contains the Abstract Test Suite (ATS) as well as the Abstract Test
Method (ATM) and the partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma for
the Data Link Layer (DLL) of the V5.1 interface.
The objective of this ETS is to provide an ATS containing conformance tests which give a high probability
of inter-operability of an Access Network (AN) and a Local Exchange (LE) from different manufacturers
over the V5.1 interface.
ISO/IEC 9646-1 [5] and ISO/IEC 9646-2 [6] are used as the basis for the test methodology. The ATS is
defined using the Tree and Tabular Combined Notation (TTCN) according to ISO/IEC 9646-3 [7].
The ATS in annex A describes a set of Test Cases (TCs) which are based on the Test Purposes (TPs)
specified in ETS 300 324-7 [3]. The TCs provide the implementation of the TPs and can be converted into
an executable test suite by using available TTCN translators and the corresponding tools.
Annex B provides the partial PIXIT proforma.
Annex C lists the bibliography.
2 Normative references
This ETS incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] ETS 300 324-1 (1994) including amendment A1 (1996): "Signalling Protocols
and Switching (SPS); V interfaces at the digital Local Exchange (LE); V5.1
interface for the support of Access Network (AN); Part 1: V5.1 interface
specification".
[2] ETS 300 324-2 (1994): "Signalling Protocols and Switching (SPS); V interfaces
at the digital Local Exchange (LE); V5.1 interface for the support of Access
Network (AN); Part 2: Protocol Implementation Conformance Statement (PICS)
proforma".
[3] ETS 300 324-7: "Signalling Protocols and Switching (SPS); V interfaces at the
digital Local Exchange (LE); V5.1 interface for the support of Access Network
(AN); Part 7: Test Suite Structure and Test Purposes (TSS&TP) specification for
the data link layer".
[4] ISO 7498: "Information Processing Systems - Open Systems Interconnection -
Basic Reference Model".
[5] ISO/IEC 9646-1: "Information Technology - Open Systems Interconnection -
Conformance testing methodology and framework - Part 1: General concepts".
[6] ISO/IEC 9646-2: "Information Technology - Open Systems Interconnection -
Conformance testing methodology and framework - Part 2: Abstract test suite
specification".
[7] ISO/IEC 9646-3: "Information Technology - Open Systems Interconnection -
Conformance testing methodology and framework - Part 3: The Tree and
Tabular Combined Notation (TTCN)".
[8] ISO/IEC 9646-5: "Information Technology - Open Systems Interconnection -
Conformance testing methodology and framework - Part 5: Requirements on
test laboratories and clients for the conformance assessment process".

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SIST ETS 300 324-8 E1:2003
Page 8
Draft prETS 300 324-8: December 1997
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
Abstract Test Case (ATC): Refer to ISO/IEC 9646-1 [5].
NOTE: In this ETS, the commonly used term TC is applied in the same way as ATC.
Abstract Test Suite (ATS): Refer to ISO/IEC 9646-1 [5].
Data Link Layer (DLL): Refer to ISO 7498 [4].
embedded variant: Refer to ISO/IEC 9646-2 [6].
Implementation Under Test (IUT): Refer to ISO/IEC 9646-1 [5].
Lower Tester (LT): Refer to ISO/IEC 9646-1 [5].
Network Layer (NWK): Refer to ISO 7498 [4].
notional UT: The upper layers of the SUT are used to realize the functions of the upper tester, without
any additional mechanism being installed.
Physical Layer (PHL): Refer to ISO 7498 [4].
PICS proforma: Refer to ISO/IEC 9646-1 [5].
PIXIT proforma: Refer to ISO/IEC 9646-1 [5].
Point Of Control And Observation (PCO): Refer to ISO/IEC 9646-1 [5].
Protocol Implementation Conformance Statement (PICS): Refer to ISO/IEC 9646-1 [5].
Protocol Implementation eXtra Information For Testing (PIXIT): Refer to ISO/IEC 9646-1 [5].
remote test method: Refer to ISO/IEC 9646-2 [6].
System Under Test (SUT): Refer to ISO/IEC 9646-1 [5].
Test Purpose (TP): Refer to ISO/IEC 9646-1 [5].
3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
AN Access Network
ASP Abstract Service Primitive
ATM Abstract Test Method
ATS Abstract Test Suite
BI Invalid Behaviour
BO Inopportune Behaviour
BV Valid Behaviour
CA Capability test
DLL Data Link Layer
ID Identifier
IE Information Element
IEI Information Element Identifier
ISDN Integrated Services Digital Network

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SIST ETS 300 324-8 E1:2003
Page 9
Draft prETS 300 324-8: December 1997
IT basic Interconnection Test
IUT Implementation Under Test
LAPV5 Link Access Protocol for V5 interface
LAPV5-DL LAPV5 Data Link sub layer
LAPV5-EF LAPV5 Envelope Function sub layer
LE Local Exchange
LT1 Lower Tester 1
NWK Network Layer
PCO Point of Control and Observation
PDU Protocol Data Unit
PHL Physical Layer
PICS Protocol Implementation Conformance Statement
PIXIT Protocol Implementation eXtra Information for Testing
PSAP PHL Service Access Point
PSTN Public Switched Telephone Network
RX Receiver condition
SAP Service Access Point
SAPI Service Access Point Identifier
SUT System Under Test
TC Test Case
TEI Terminal Endpoint Identifier
TI Timer
TP Test Purpose
TSS Test Suite Structure
TTCN Tree and Tabular Combined Notation
TX Transmitter condition
UT Upper Tester
V5DLaddr V5 Data Link address
V5DLL V5 Data Link Layer
4 Abstract test method
This clause describes the Abstract Test Method (ATM) and the Point of Control and Observation (PCO)
used to test the DLL of the V5.1 protocol.
4.1 ATM
Principally, the remote test method is used for V5 DLL conformance testing. Certain DLL TPs need also
part of the NWK functions (e.g. I frame transmission). Therefore, the embedded variant of the remote test
method is applied.
4.2 DLL protocol testing
The V5.1 implementations do not offer a direct access to the upper service boundary. The remote test
method was chosen because any co-ordination procedures can only be expressed in an informal way.
LT1: A Lower Tester (LT1) is located in a remote V5.1 test system. It controls and
observes the behaviours of the IUT.
PCO: The PCO for DLL testing is located on the PSAP. All test events at the PCO are
specified in terms of PH-Data ASPs and DLL PDUs. A single PCO is defined for
DLL testing in order to exchange messages of the LAPV5-EF sub layer as well
as of the LAPV5-DL sub layer.
Notional UT: The notional UT includes the NWK and system management functions.
V5-DLL: V5-DLL includes LAPV5-EF, mapping function and LAPV5-DL.
AN test: To test the LAPV5-EF protocol, an ISDN terminal shall be connected to the
relevant user port.

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SIST ETS 300 324-8 E1:2003
Page 10
Draft prETS 300 324-8: December 1997
SUT
V5 Test S ystem
notional
   UT
LT1
V5-DLL PDU
IUT
V5-DLL
PCO / PSAP PH-Data
S ervice Provider
Physical Layer
Figure 1: Remote test method applied to the V5.1 DLL testing
4.3 Execution of test cases
4.3.1 AN-LE testing
Regarding the DLL protocol of V5.1, the V5.1 interface is almost symmetrical, except that the Frame
Relay function is only implemented in the AN. There are two protocol subjects which have to be adapted
for LE testing, the message sequence of a generic call to the ISDN entity and the handling of the CR bit.
The generic call to the ISDN entity is stopped after having received from the IUT an UA response frame
as a response to a previously sent SABME command frame. Until the ISDN link initialization, the V5.1
protocol is symmetrical as only a point-to-point connection over a single data link is established (fixed
TEI).
The problem of the CR bit handling is solved in the ATS. The CR bit is defined as a test suite parameter
which allows to invert the CR bit for LE testing. Table 1 documents this approach.
Table 1: AN-LE parameters
AN LE
TSPX_AN TRUE FALSE
CR_0 '0'B '1'B
CR_1 '1'B '0'B
4.3.2 Handling of error indications
During the execution of the DLL ATS, many MDL-ERROR-IND will be sent to the system management
due to the invalid and inopportune test cases. It is up to the IUT supplier to take the necessary precautions
to avoid any impact on the test result.
Some tests use NWK procedures to test DLL functions, it is not a
...

SLOVENSKI STANDARD
SIST ETS 300 324-8 E1:2003
01-december-2003
Vmesniki V pri digitalnih krajevnih centralah (LE) – Vmesnik V5.1 za podporo
dostopovnemu omrežju (AN) – 8. del: Abstraktni preskušalni niz (ATS) in dodatna
informacija za preskušanje delne izvedbe protokola (PIXIT) – Proforma
specifikacija za podatkovno povezovalno plast
V interfaces at the digital Local Exchange (LE); V5.1 interface for the support of Access
Network (AN); Part 8: Abstract Test Suite (ATS) and partial Protocol Implementation
eXtra Information for Testing (PIXIT) proforma specification for the data link layer
Ta slovenski standard je istoveten z: ETS 300 324-8 Edition 1
ICS:
33.040.30 Komutacijski in signalizacijski Switching and signalling
sistem systems
SIST ETS 300 324-8 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 324-8 E1:2003

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SIST ETS 300 324-8 E1:2003
EUROPEAN ETS 300 324-8
TELECOMMUNICATION April 1999
STANDARD
Source: SPS Reference: DE/SPS-09003.3-7
ICS: 33.020
Key words: AN, ATS, ISDN, layer 2, LE, PIXIT, PSTN, testing, V interface, V5 interface
V interfaces at the digital Local Exchange (LE);
V5.1 interface for the support of Access Network (AN);
Part 8: Abstract Test Suite (ATS) and partial Protocol
Implementation eXtra Information for Testing (PIXIT) proforma
specification for the data link layer
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Internet: [e-mail] - http://www.etsi.org
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1999. All rights reserved.

---------------------- Page: 3 ----------------------

SIST ETS 300 324-8 E1:2003
Page 2
ETS 300 324-8: April 1999
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Standards Making Support Dept." at the address shown on the title page.

---------------------- Page: 4 ----------------------

SIST ETS 300 324-8 E1:2003
Page 3
ETS 300 324-8: April 1999
Contents
Foreword . 5
1 Scope. 7
2 Normative references . 7
3 Definitions and abbreviations. 8
3.1 Definitions. 8
3.2 Abbreviations. 8
4 Abstract test method. 9
4.1 ATM. 9
4.2 DLL protocol testing. 9
4.3 Execution of test cases . 10
4.3.1 AN-LE testing. 10
4.3.2 Handling of error indications . 10
4.3.3 Test case execution sequence . 10
5 Untestable test purposes . 11
6 Abstract test suite conventions . 11
6.1 Naming conventions. 11
6.1.1 Declaration part. 11
6.1.2 Constraint part . 12
6.1.3 Dynamic part. 12
6.1.3.1 Test cases. 12
6.1.3.2 Test steps. 12
6.1.3.3 General aspects . 13
6.1.4 ATS abbreviations. 13
6.2 Implementation conventions. 13
6.2.1 Declaration part. 13
6.2.2 Constraint part . 14
6.2.3 Dynamic part. 14
6.2.4 Documentation. 15
Annex A (normative): Abstract Test Suite (ATS) for DLL testing. 16
A.1 The TTCN Graphical form (TTCN.GR). 16
A.2 The TTCN Machine Processable form (TTCN.MP). 16
Annex B (normative): Partial PIXIT proforma . 17
B.1 Introduction . 17
B.2 PIXIT proforma . 17
B.2.1 Identification summary . 17
B.2.2 Abstract test suite summary. 17
B.2.3 Test laboratory. 17
B.2.4 Client . 18
B.2.5 SUT . 18
B.2.6 Protocol layer information. 18
B.2.6.1 Protocol identification. 18
B.2.6.2 IUT information . 19

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SIST ETS 300 324-8 E1:2003
Page 4
ETS 300 324-8: April 1999
Annex C (informative): Bibliography.21
History.22

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SIST ETS 300 324-8 E1:2003
Page 5
ETS 300 324-8: April 1999
Foreword
This European Telecommunication Standard (ETS) has been produced by the Signalling Protocol and
Switching (SPS) Technical Committee of the European Telecommunications Standards Institute (ETSI).
This ETS is part 8 of a multi-part standard covering the V5.1 interface as described below:
Part 1: "V5.1 interface specification";
Part 2: "Protocol Implementation Conformance Statement (PICS) proforma";
Part 3: "Test Suite Structure and Test Purposes (TSS&TP) specification for the network layer (AN
side)";
Part 4: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing
(PIXIT) proforma specification for the network layer (AN side)";
Part 5: "Test Suite Structure and Test Purposes (TSS&TP) specification for the network layer (LE
side)";
Part 6: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing
(PIXIT) proforma specification for the network layer (LE side)";
Part 7: "Test Suite Structure and Test Purposes (TSS&TP) specification for the data link layer";
Part 8: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for
Testing (PIXIT) proforma specification for the data link layer";
Part 9: "Test specifications for the physical layer".
Transposition dates
Date of adoption of this ETS: 26 March 1999
Date of latest announcement of this ETS (doa): 30 June 1999
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 December 1999
Date of withdrawal of any conflicting National Standard (dow): 31 December 1999

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SIST ETS 300 324-8 E1:2003
Page 6
ETS 300 324-8: April 1999
Blank page

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SIST ETS 300 324-8 E1:2003
Page 7
ETS 300 324-8: April 1999
1 Scope
This eighth part of ETS 300 324 contains the Abstract Test Suite (ATS) as well as the Abstract Test
Method (ATM) and the partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma for
the Data Link Layer (DLL) of the V5.1 interface.
The objective of this ETS is to provide an ATS containing conformance tests which give a high probability
of inter-operability of an Access Network (AN) and a Local Exchange (LE) from different manufacturers
over the V5.1 interface.
ISO/IEC 9646-1 [5] and ISO/IEC 9646-2 [6] are used as the basis for the test methodology. The ATS is
defined using the Tree and Tabular Combined Notation (TTCN) according to ISO/IEC 9646-3 [7].
The ATS in annex A describes a set of Test Cases (TCs) which are based on the Test Purposes (TPs)
specified in ETS 300 324-7 [3]. The TCs provide the implementation of the TPs and can be converted into
an executable test suite by using available TTCN translators and the corresponding tools.
Annex B provides the partial PIXIT proforma.
Annex C lists the bibliography.
2 Normative references
This ETS incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] ETS 300 324-1 (1994) including amendment A1: "V interfaces at the digital
Local Exchange (LE); V5.1 interface for the support of Access Network (AN);
Part 1: V5.1 interface specification".
[2] ETS 300 324-2 (1994): "V interfaces at the digital Local Exchange (LE); V5.1
interface for the support of Access Network (AN); Part 2: Protocol
Implementation Conformance Statement (PICS) proforma".
[3] ETS 300 324-7 (1999): "V interfaces at the digital Local Exchange (LE); V5.1
interface for the support of Access Network (AN); Part 7: Test Suite Structure
and Test Purposes (TSS&TP) specification for the data link layer".
[4] ISO 7498: "Information processing systems - Open Systems Interconnection -
Basic Reference Model".
[5] ISO/IEC 9646-1: "Information technology - Open Systems Interconnection -
Conformance testing methodology and framework - Part 1: General concepts".
[6] ISO/IEC 9646-2: "Information technology - Open Systems Interconnection -
Conformance testing methodology and framework - Part 2: Abstract test suite
specification".
[7] ISO/IEC 9646-3: "Information technology - Open Systems Interconnection -
Conformance testing methodology and framework - Part 3: The Tree and
Tabular Combined Notation (TTCN)".
[8] ISO/IEC 9646-5: "Information technology - Open Systems Interconnection -
Conformance testing methodology and framework - Part 5: Requirements on
test laboratories and clients for the conformance assessment process".

---------------------- Page: 9 ----------------------

SIST ETS 300 324-8 E1:2003
Page 8
ETS 300 324-8: April 1999
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
abstract test case: Refer to ISO/IEC 9646-1 [5]
NOTE: In this ETS, the commonly used term TC is applied in the same way as ATC.
abstract test suite: Refer to ISO/IEC 9646-1 [5]
data link layer: Refer to ISO 7498 [4]
embedded variant: Refer to ISO/IEC 9646-2 [6]
implementation under test: Refer to ISO/IEC 9646-1 [5]
lower tester: Refer to ISO/IEC 9646-1 [5]
network layer: Refer to ISO 7498 [4]
notional UT: The upper layers of the SUT are used to realize the functions of the upper tester, without
any additional mechanism being installed
physical layer: Refer to ISO 7498 [4]
PICS proforma: Refer to ISO/IEC 9646-1 [5]
PIXIT proforma: Refer to ISO/IEC 9646-1 [5]
point of control and observation: Refer to ISO/IEC 9646-1 [5]
Protocol Implementation Conformance Statement (PICS): Refer to ISO/IEC 9646-1 [5]
Protocol Implementation eXtra Information for Testing (PIXIT): Refer to ISO/IEC 9646-1 [5]
remote test method: Refer to ISO/IEC 9646-2 [6]
system under test: Refer to ISO/IEC 9646-1 [5]
test purpose: Refer to ISO/IEC 9646-1 [5]
3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
AN Access Network
ASP Abstract Service Primitive
ATM Abstract Test Method
ATS Abstract Test Suite
BI Invalid Behaviour
BO Inopportune Behaviour
BV Valid Behaviour
CA Capability test
DLL Data Link Layer
ID Identifier
IE Information Element
IEI Information Element Identifier
ISDN Integrated Services Digital Network

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SIST ETS 300 324-8 E1:2003
Page 9
ETS 300 324-8: April 1999
IT basic Interconnection Test
IUT Implementation Under Test
LAPV5 Link Access Protocol for V5 interface
LAPV5-DL LAPV5 Data Link sub layer
LAPV5-EF LAPV5 Envelope Function sub layer
LE Local Exchange
LT1 Lower Tester 1
NWK Network (Layer)
PCO Point of Control and Observation
PDU Protocol Data Unit
PHL Physical Layer
PICS Protocol Implementation Conformance Statement
PIXIT Protocol Implementation eXtra Information for Testing
PSAP PHL Service Access Point
PSTN Public Switched Telephone Network
RX Receiver condition
SAP Service Access Point
SAPI Service Access Point Identifier
SUT System Under Test
TC Test Case
TEI Terminal Endpoint Identifier
TI Timer
TP Test Purpose
TSS Test Suite Structure
TTCN Tree and Tabular Combined Notation
TX Transmitter condition
UT Upper Tester
V5DLaddr V5 Data Link address
V5DLL V5 Data Link Layer
4 Abstract test method
This clause describes the Abstract Test Method (ATM) and the Point of Control and Observation (PCO)
used to test the DLL of the V5.1 protocol.
4.1 ATM
Principally, the remote test method is used for V5 DLL conformance testing. Certain DLL TPs need also
part of the NWK functions (e.g. I frame transmission). Therefore, the embedded variant of the remote test
method is applied.
4.2 DLL protocol testing
The V5.1 implementations do not offer a direct access to the upper service boundary. The remote test
method was chosen because any co-ordination procedures can only be expressed in an informal way.
LT1: A Lower Tester (LT1) is located in a remote V5.1 test system. It controls and
observes the behaviours of the IUT.
PCO: The PCO for DLL testing is located on the PSAP. All test events at the PCO are
specified in terms of PH-Data ASPs and DLL PDUs. A single PCO is defined for
DLL testing in order to exchange messages of the LAPV5-EF sub layer as well
as of the LAPV5-DL sub layer.
Notional UT: The notional UT includes the NWK and system management functions.
V5-DLL: V5-DLL includes LAPV5-EF, mapping function and LAPV5-DL.
AN test: To test the LAPV5-EF protocol, an ISDN terminal shall be connected to the
relevant user port.

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SUT
V5 Test S ystem
notional
   UT
LT1
V5-DLL PDU
IUT
V5-DLL
PCO / PSAP PH-Data
S ervice Provider
Physical Layer
Figure 1: Remote test method applied to the V5.1 DLL testing
4.3 Execution of test cases
4.3.1 AN-LE testing
Regarding the DLL protocol of V5.1, the V5.1 interface is almost symmetrical, except that the Frame
Relay function is only implemented in the AN. There are two protocol subjects which have to be adapted
for LE testing, the message sequence of a generic call to the ISDN entity and the handling of the CR bit.
The generic call to the ISDN entity is stopped after having received from the IUT an UA response frame
as a response to a previously sent SABME command frame. Until the ISDN link initialization, the V5.1
protocol is symmetrical as only a point-to-point connection over a single data link is established (fixed
TEI).
The problem of the CR bit handling is solved in the ATS. The CR bit is defined as a test suite parameter
which allows to invert the CR bit for LE testing. Table 1 documents this approach.
Table 1: AN-LE parameters
AN LE
TSPX_AN TRUE FALSE
CR_0 '0'B '1'B
CR_1 '1'B '0'B
4.3.2 Handling of error indications
During the execution of the DLL ATS, many MDL-ERROR-IND will be sent to the system management
due to the invalid and inopportune test cases. It is up to the IUT supplier to take the necessary precautions
to avoid any impact on the test result.
Some tests use NWK procedures to test DLL functions, it is not always possible to handle the NWK
properly. The effects of such faulty NWK messages and procedures are out of the scope of this ETS. It is
up to the IUT supplier to take the necessary precautions to avoid any impact on the test result.
4.3.3 Test case execution sequence
There is no restriction concerning the execution sequence of the DLL test cases, but to facilitate the
analysis of the test results the following test sequence should be applied:
Protocol groups: LAPV5-EF ⇒ LAPV5-DL.
Test groups: IT ⇒ CA ⇒ TI ⇒ BV ⇒ BO ⇒ BI.

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5 Untestable test purposes
This clause contains a list of TPs which are not covered by the ATS due to the chosen ATM or other
restrictions.
The following TPs are not implemented because they can be only tested under load conditions. It is
assumed that a possible target conformance test system will not have the capacity to generate load.
Table 2: Unimplemented TPs
Test Purpose ID Reference to ETS 300 324-7 [3]
TP23S5003 Refer to subclause 5.3.3.2.1
TP23S7014 Refer to subclause 5.3.3.3.1
6 Abstract test suite conventions
The ATS conventions are intended to give a better understanding of the ATS but they describe also the
conventions made for the development of the ATS, thus for any later maintenance purposes or further
development of the ATS the conventions described in this clause should be applied.
The ATS conventions contain two clauses, the naming conventions and the implementation conventions.
The naming conventions describe the structure of the naming of all ATS elements. The implementation
conventions describe the functional structure of the ATS.
NOTE: To define the ATS, the guidelines given in ETS 300 406 and ETR 141 were
considered.
6.1 Naming conventions
6.1.1 Declaration part
The ID names of the following definitions are written in lowercase:
- structured type definitions;
- ASP type definitions;
- PDU type definitions.
The ID names of the following definitions are written in uppercase:
- Test Suite Para
...