ETSI ETS 300 347-8 ed.1 (1999-04)

SLOVENSKI STANDARD
SIST ETS 300 347-8 E1:2003
01-december-2003
Vmesniki V pri digitalnih krajevnih centralah (LE) – Vmesnik V5.2 za podporo
dostopovnemu omrežju (AN) – 8. del: Abstraktni preskušalni niz (ATS) in delna
dodatna informacija za preskušanje izvedbe protokola (PIXIT) – Proforma
specifikacija za podatkovno povezovalno plast
V interfaces at the digital Local Exchange (LE); V5.2 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 300 347-8 Edition 1
ICS:
33.040.30 Komutacijski in signalizacijski Switching and signalling
sistem systems
SIST ETS 300 347-8 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 347-8 E1:2003

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SIST ETS 300 347-8 E1:2003
EUROPEAN ETS 300 347-8
TELECOMMUNICATION April 1999
STANDARD
Source: SPS Reference: DE/SPS-09003.4-7
ICS: 33.020
Key words: V interface, V5 interface, PSTN, ISDN, LE, ATS, PIXIT, testing, layer 2, AN
V interfaces at the digital Local Exchange (LE);
V5.2 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: secretariat@etsi.fr - http://www.etsi.org
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
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.

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ETS 300 347-8: 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.

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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 Link control FSM - Physical Layer connection . 10
4.3.4 Test case execution sequence . 10
5 Untestable test purposes . 11
5.1 List of unimplemented TPs. 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. 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 . 18
B.2.5 SUT . 18
B.2.6 Protocol layer information. 19
B.2.6.1 Protocol identification. 19
B.2.6.2 IUT information . 19

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ETS 300 347-8: April 1999
Annex C (informative): Merging procedure of V5.1 ATS and V5.2 ATS additions .21
Annex D (informative): Bibliography.22
History.23

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ETS 300 347-8: April 1999
Foreword
This European Telecommunication Standard (ETS) has been produced by the Signalling Protocols 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: "V5.2 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".
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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1 Scope
This eighth part of ETS 300 347 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 V5.2 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 V5.2 interface.
ISO/IEC 9646-1 [8] and ISO/IEC 9646-2 [9] 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 [10].
The ATS in annex A describes a set of Test Cases (TCs) which are based on the Test Purposes (TPs)
specified in ETS 300 347-7 [7] (which is an extension of 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.
This ETS needs to be used in conjunction with ETS 300 324-8 [4]. To create a complete V5.2 ATS, the
V5.1 ATS contained in ETS 300 324-8 [4] and the V5.2 ATS additions contained in annex A of this ETS
need to be merged. Annex C gives assistance with this procedure.
Annex D lists the informative references.
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 300 324-5 (1999): "V interfaces at the digital Local Exchange (LE); V5.1
interface for the support of Access Network (AN); Part 5: Test Suite Structure
and Test Purposes (TSS&TP) specification for the network layer (LE side)".
[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] ETS 300 324-8 (1999): "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".
[5] ETS 300 347-1 (1994) including amendment A1: "V interfaces at the digital
Local Exchange (LE); V5.2 interface for the support of Access Network (AN);
Part 1: V5.2 interface specification".
[6] ETS 300 347-2 (1999): "V interfaces at the digital Local Exchange (LE); V5.2
interface for the support of Access Network (AN); Part 2: Protocol
Implementation Conformance Statement (PICS) proforma".
[7] ETS 300 347-7 (1999): "V interfaces at the digital Local Exchange (LE); V5.2
interface for the support of Access Network (AN); Part 7: Test Suite Structure
and Test Purposes (TSS&TP) specification for the data link layer".

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[8] ISO/IEC 9646-1: "Information Technology - Open Systems Interconnection -
Conformance testing methodology and framework - Part 1: General concepts".
[9] ISO/IEC 9646-2: "Information Technology - Open Systems Interconnection -
Conformance testing methodology and framework - Part 2: Abstract test suite
specification".
[10] ISO/IEC 9646-3: "Information Technology - Open Systems Interconnection -
Conformance testing methodology and framework - Part 3: The Tree and
Tabular Combined Notation (TTCN)".
[11] 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".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, all definitions given in ETS 300 324-8 [4] apply.
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
FSM Finite State Machine
ID Interface identifier
ISDN Integrated Services Digital Network
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 eXtran Information for Testing
PSAP PHL Service Access Point
PSTN Public Switched Telephone Network
SAP Service Access Point
SUT System Under Test
TC Test Case
TEI Terminal Endpoint Identifier
TI Timer
TP Test Purpose
TTCN Tree and Tabular Combined Notation
UT Upper Tester
V5DLL V5 Data Link Layer

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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 V5.2 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 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.
SUT
V5 Test S ystem
notional
   UT
LT1
V 5-DLL P DU
IUT
V5-DLL
PCO / PS AP PH-Data
S ervice Provider
Physical Layer
Figure 1: Remote test method applied to the V5.1 DLL testing
LT1: A Lower Tester (LT1) is located in a remote V5 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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4.3 Execution of test cases
4.3.1 AN-LE testing
Regarding the DLL protocol of V5.2, the V5.2 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 V5.2
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 the DLL ATS.
It is up to the IUT supplier to take the necessary precautions to avoid any impact on the test result.
4.3.3 Link control FSM - Physical Layer connection
During the Link identification procedure (see ETS 300 347-1 [5], subclause 16.2.4.3.5) the Link control
FSM needs to communicate wit the Physical layer. This fact has a direct impact on the execution of the
Link identification procedure. As it is not possible to make requirements on the internal behaviour of the
LT1, it is required that the LT1 implementation takes care about the Link control FSM - Physical Layer
communication.
4.3.4 Test case execution sequence
There is no restriction concerning the execution sequence of the DLL test cases, but to facilitate the
analyse 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 lists of TPs which are not implemented in the ATS due to the chosen ATM or other
restrictions.
5.1 List of unimplemented TPs
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 Parameter Declarations;
- Test Case Selection Expression Defi
...