SIST EN 300 369-4 V1.2.4:2005

SLOVENSKI STANDARD
SIST EN 300 369-4 V1.2.4:2005
01-april-2005

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Integrated Services Digital Network (ISDN); Explicit Call Transfer (ECT) supplementary

service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 4: Abstract

Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Intellectual Property Rights ............................................................................................................................... 5

Foreword............................................................................................................................................................ 5

1 Scope........................................................................................................................................................ 6

2 References ............................................................................................................................................... 6

3 Definitions and abbreviations.................................................................................................................. 7

3.1 Definitions ......................................................................................................................................................... 7

3.2 Abbreviations..................................................................................................................................................... 7

4 Abstract Test Method .............................................................................................................................. 7

5 Untestable test purposes .......................................................................................................................... 8

6 ATS conventions ..................................................................................................................................... 8

6.1 Version of TTCN used....................................................................................................................................... 8

6.2 Use of ASN.1..................................................................................................................................................... 8

6.2.1 Situations where ASN.1 is used ................................................................................................................... 8

6.2.2 Specification of encoding rules .................................................................................................................... 8

7 ATS to TP map ........................................................................................................................................ 9

8 PCTR conformance ................................................................................................................................. 9

9 PIXIT conformance ................................................................................................................................. 9

10 ATS conformance.................................................................................................................................. 10

Annex A (normative): Protocol Conformance Test Report (PCTR) proforma ............................ 11

A.1 Identification summary.......................................................................................................................... 11

A.1.1 Protocol conformance test report..................................................................................................................... 11

A.1.2 IUT identification ............................................................................................................................................ 11

A.1.3 Testing environment ........................................................................................................................................ 11

A.1.4 Limits and reservations .................................................................................................................................... 12

A.1.5 Comments ........................................................................................................................................................ 12

A.2 IUT conformance status......................................................................................................................... 12

A.3 Static conformance summary................................................................................................................. 12

A.4 Dynamic conformance summary ........................................................................................................... 12

A.5 Static conformance review report.......................................................................................................... 13

A.6 Test campaign report ............................................................................................................................. 14

A.7 Observations .......................................................................................................................................... 15

Annex B (normative): Partial PIXIT proforma ............................................................................... 16

B.1 Identification summary.......................................................................................................................... 16

B.2 Abstract test suite summary................................................................................................................... 16

B.3 Test laboratory....................................................................................................................................... 16

B.4 Client (of the test laboratory) ................................................................................................................ 17

B.5 System Under Test (SUT) ..................................................................................................................... 17

B.6 Protocol information.............................................................................................................................. 18

B.6.1 Protocol identification ..................................................................................................................................... 18

B.6.2 IUT information............................................................................................................................................... 18

B.6.2.1 Parameter values ........................................................................................................................................ 18

B.6.2.2 Sending of messages by IUT...................................................................................................................... 19

B.6.2.3 Timer values............................................................................................................................................... 19

B.6.2.4 Information element codings...................................................................................................................... 20

Annex C (normative): Abstract Test Suite (ATS) ............................................................................ 21

C.1 The TTCN Graphical form (TTCN.GR) ............................................................................................... 21

C.2 The TTCN Machine Processable form (TTCN.MP)............................................................................. 21

Bibliography .................................................................................................................................................... 22

History.............................................................................................................................................................. 23

IPRs essential or potentially essential to the present document may have been declared to ETSI. The information

pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

in SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect

of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server

Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee

can be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)

This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Signalling

The present document is part 4 of a multi-part standard covering the Explicit Call Transfer (ECT) supplementary

service; Digital Subscriber Signalling System No. one (DSS1) protocol; as described below:

Part 2: "Protocol Implementation Conformance Statement (PICS) proforma specification";

Part 3: "Test Suite Structure and Test Purposes (TSS&TP) specification for the user";

Part 4: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for

Part 5: "Test Suite Structure and Test Purposes (TSS&TP) specification for the network";

Part 6: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)

This fourth part of EN 300 369 specifies the Abstract Test Suite (ATS) and partial Protocol Implementation eXtra

Information for Testing (PIXIT) proforma for the User side of the T reference point or coincident S and T reference

point of implementations conforming to the stage three standard for the Explicit Call Transfer (ECT) supplementary

service for the pan-European Integrated Services Digital Network (ISDN) by means of the Digital Subscriber Signalling

EN 300 369-3 [3] specifies the Test Suite Structure and Test Purposes (TSS&TP) related to this ATS and partial PIXIT

proforma specification. Other parts specify the TSS&TP and the ATS and partial PIXIT proforma for the Network side

of the T reference point or coincident S and T reference point of implementations conforming to EN 300 369-1 [1].

The following documents contain provisions which, through reference in this text, constitute provisions of the present

• References are either specific (identified by date of publication, edition number, version number, etc.) or

• A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same

[1] EN 300 369-1 (V1.2): "Integrated Services Digital Network (ISDN); Explicit Call Transfer (ECT)

supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1:

[2] EN 300 369-2 (V1.2): "Integrated Services Digital Network (ISDN); Explicit Call Transfer (ECT)

supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 2:

[3] EN 300 369-3 (V1.2): "Integrated Services Digital Network (ISDN); Explicit Call Transfer (ECT)

supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 3: Test

[5] EN 300 196-1: "Integrated Services Digital Network (ISDN); Generic functional protocol for the

support of supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol;

[6] ISO/IEC 9646: "Information technology - Open Systems Interconnection - Conformance testing

[7] TR 101 101 (V1.1): "Methods for Testing and Specification (MTS); TTCN interim version

including ASN.1 1994 support [ISO/IEC 9646-3] (Second Edition Mock-up for JTC1/SC21

[8] ISO/IEC 8825-1 (1994): "Information technology - ASN.1 encoding rules: Specification of

For the purposes of the present document, the terms and definitions given in ISO/IEC 9646 [6] apply.

A Point of Control and Observation (PCO) resides at the service access point between layers 2 and 3 in the test system.

This PCO is named "L" (for Lower). The L PCO is used to control and observe the behaviour of the Implementation

Under Test (IUT) and test case verdicts are assigned depending on the behaviour observed at this PCO.

A second "informal" PCO, called "O" (for Operator) is used to specify control but not observation above the IUT;

events at this PCO are never used to generate test case verdicts. Messages sent by the tester at this PCO explicitly

indicate to the operator actions which are to be performed on the SUT. This is regarded as a preferred alternative to the

1) types defined in ASN.1 can model problems that "pure" TTCN cannot. For instance, data structures modelling

2) ASN.1 provides a better restriction mechanism for type definitions by using sub-type definitions;

3) it is necessary to use ASN.1 to reproduce the type definitions for remote operation components specified in the

The possibility to use TTCN and ASN.1 in combination is used, i.e. referring to an ASN.1 type from a TTCN type.

There is a variation in the encoding rules applied to ASN.1 types and constraints specified in this ATS and therefore a

mechanism is needed to differentiate the encoding rules. However the mechanism specified in ISO/IEC 9646-3/AM2 [6]

and in TR 101 101 [7] does not facilitate definition of the encoding rules as needed for this ATS. A solution is therefore

used which is broadly in the spirit of ISO/IEC 9646-3/AM2 [6] in which comment fields have been used as a means of

For ASN.1 used in this ATS, two variations of encoding rules are used. One is the commonly known Basic Encoding

Rules (BER) as specified in ISO/IEC 8825-1 [8]. In the second case the encoding is according to ISDN, i.e. the ASN.1

data types are a representation of structures contained within the ISDN specification (basic call, Generic functional

protocol or individual supplementary service). For example, if octets of an information element are specified in ASN.1

as a SEQUENCE then this should be encoded in an Executable Test Suite (ETS) as any other ISDN information element

specified using tabular TTCN. This ISDN encoding variation is the default encoding rule for this ATS. This means that

all ASN.1 constraint tables are encoded using ISDN (non-BER) encoding unless stated otherwise. BER encoding should

never be applied to an ASN.1 constraint where BER encoding has not been specified. This encoding rule is sometimes

For BER encoding, an indication is given in the comments field of the table header. For this ATS such indications

appear in the ASN.1 type constraint declaration tables only. In the first line of the table header comment field, the

NOTE: Within BER, there are a number of variations for the encoding of lengths of fields.

According to EN 300 196-1 [5], an IUT should be able to interpret all length forms within BER for received PDUs.

When sending PDUs containing BER encoding, EN 300 196-1 [5] gives guidelines but makes no restrictions on the

In this particular ATS all ASN.1 type constraints which are of type "Component" are to be encoded using BER.

The identifiers used for the TPs are reused as test case names. Thus there is a straightforward one-to-one mapping.

A test laboratory, when requested by a client to produce a PCTR, is required, as specified in ISO/IEC 9646-5 [6], to

produce a PCTR conformant with the PCTR template given in annex B of ISO/IEC 9646-5 [6].

Furthermore, a test laboratory, offering testing for the ATS specification contained in annex C, when requested by a

client to produce a PCTR, is required to produce a PCTR conformant with the PCTR proforma contained in annex A.

A PCTR which conforms to this PCTR proforma specification shall preserve the content and ordering of the clauses

contained in annex A. Clause A.6 of the PCTR may contain additional columns. If included, these shall be placed to the

right of the existing columns. Text in italics may be retained by the test laboratory.

A test realizer, producing an executable test suite for the ATS specification contained in annex C, is required, as

specified in ISO/IEC 9646-4 [6], to produce an augmented partial PIXIT proforma conformant with this partial PIXIT

An augmented partial PIXIT proforma which conforms to this partial PIXIT proforma specification shall, as a minimum,

have contents which are technically equivalent to annex B. The augmented partial PIXIT proforma may contain

additional questions that need to be answered in order to prepare the Means Of Testing (MOT) for a particular IUT.

A test laboratory, offering testing for the ATS specification contained in annex C, is required, as specified in

ISO/IEC 9646-5 [6], to further augment the augmented partial PIXIT proforma to produce a PIXIT proforma

A PIXIT proforma which conforms to this partial PIXIT proforma specification shall, as a minimum, have contents

which are technically equivalent to annex B. The PIXIT proforma may contain additional questions that need to be

The test realizer, producing MOT and ETS for this ATS specification, shall comply with the requirements of

ISO/IEC 9646-4 [6]. In particular, these concern the realization of an ETS based on each ATS. The test realizer shall

An EN which conforms to this ATS specification shall contain test groups and test cases which are technically

equivalent to those contained in the ATS in annex C. All sequences of test events comprising an abstract test case shall

be capable of being realized in the executable test case. Any further checking which the test system might be capable of

performing is outside the scope of this ATS specification and shall not contribute to the verdict assignment for each test

Test laboratories running conformance test services using this ATS shall comply with ISO/IEC 9646-5 [6].

A test laboratory which claims to conform to this ATS specification shall use an MOT which conforms to this ATS.

Notwithstanding the provisions of the copyright clause related to the text of the present document, ETSI grants that users

of the present document may freely reproduce the PCTR proforma in this annex so that it can be used for its intended

Additional information relevant to the technical contents or further use of the test report, or to the rights and

obligations of the test laboratory and the client, may be given here. Such information may include restriction on the

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Additional comments may be given by either the client or the test laboratory on any of the contents of the PCTR, for

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This IUT has/has not been shown by conformance assessment to be non-conforming to the specified protocol

Strike the appropriate words in this sentence. If the PICS for this IUT is consistent with the static conformance

requirements (as specified in clause A.3 of this report) and there are no "FAIL" verdicts to be recorded (in clause A.6)

The PICS for this IUT is/is not consistent with the static conformance requirements in the specified protocol.

Strike the appropriate words in this sentence. If there are no "FAIL" verdicts to be recorded (in clause A.6 of this

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If clause A.3 indicates non-conformance, this clause itemizes the mismatches between the PICS and the static

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