Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user

Update to references to cite latest basic call standards et al. Incorporation of minor technical modifications where necessary.

Digitalno omrežje z integriranimi storitvami (ISDN) - Dopolnilna storitev: zadržanje klica (HOLD) - Protokol digitalne naročniške signalizacije št. 1 (DSS1) - 4. del: Abstraktni preskušalni niz (ATS) in dodatna informacija za preskušanje delne izvedbe protokola (PIXIT) - Proforma specifikacija za uporabnika

General Information

Status
Published
Publication Date
30-Jun-2005
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jul-2005
Due Date
01-Jul-2005
Completion Date
01-Jul-2005

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SLOVENSKI STANDARD
SIST EN 300 141-4 V1.2.4:2005
01-julij-2005

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Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service;

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

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

proforma specification for the user
Ta slovenski standard je istoveten z: EN 300 141-4 Version 1.2.4
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST EN 300 141-4 V1.2.4:2005 en

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

---------------------- Page: 1 ----------------------
SIST EN 300 141-4 V1.2.4:2005
---------------------- Page: 2 ----------------------
SIST EN 300 141-4 V1.2.4:2005
EN 300 141-4 V1.2.4 (1998-06)
European Standard (Telecommunications series)
Integrated Services Digital Network (ISDN);
Call Hold (HOLD) supplementary service;
Digital Subscriber Signalling System No. one (DSS1) protocol;
Part 4: Abstract Test Suite (ATS) and partial Protocol
Implementation eXtra Information for Testing (PIXIT)
proforma specification for the user
---------------------- Page: 3 ----------------------
SIST EN 300 141-4 V1.2.4:2005
2 EN 300 141-4 V1.2.4 (1998-06)
Reference
REN/SPS-05145-S-4 (1b100iqo.PDF)
Keywords
ISDN, DSS1, supplementary service, HOLD,
testing, ATS, PIXIT, user
ETSI
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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 1998.
All rights reserved.
ETSI
---------------------- Page: 4 ----------------------
SIST EN 300 141-4 V1.2.4:2005
3 EN 300 141-4 V1.2.4 (1998-06)
Contents

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

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

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

2 Normative references ...............................................................................................................................6

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

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

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

4 Abstract Test Method (ATM) ..................................................................................................................8

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

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

6.1 Declarations part................................................................................................................................................ 8

6.1.1 Type definitions ........................................................................................................................................... 8

6.1.1.1 Simple type definitions ........................................................................................................................... 8

6.1.1.2 Structured type definitions...................................................................................................................... 9

6.1.1.2.1 TTCN structured type definitions ..................................................................................................... 9

6.1.1.2.2 ASN.1 structured type definitions..................................................................................................... 9

6.1.1.3 ASP type definitions............................................................................................................................. 10

6.1.1.3.1 TTCN ASP type definitions............................................................................................................ 10

6.1.1.3.2 ASN.1 ASP type definitions............................................................................................................ 11

6.1.1.4 PDU type definitions ............................................................................................................................ 11

6.1.1.4.1 TTCN PDU type definitions ........................................................................................................... 11

6.1.1.4.2 ASN.1 PDU type definitions........................................................................................................... 11

6.1.2 Test suite constants..................................................................................................................................... 11

6.1.3 Test suite parameters.................................................................................................................................. 11

6.1.4 Variables .................................................................................................................................................... 11

6.1.4.1 Test suite variables ............................................................................................................................... 11

6.1.4.2 Test case variables................................................................................................................................ 11

6.1.5 Test suite operation definitions .................................................................................................................. 12

6.2 Constraints part................................................................................................................................................ 12

6.2.1 Structured type constraint declaration ........................................................................................................ 12

6.2.2 ASN.1 type constraint declaration.............................................................................................................. 12

6.2.2.1 Specification of encoding rules............................................................................................................. 13

6.2.3 ASP type constraint declaration ................................................................................................................. 14

6.2.3.1 ASN.1 ASP type constraint declaration................................................................................................ 14

6.2.3.2 TTCN ASP type constraint declaration ................................................................................................ 14

6.2.4 PDU type constraint declaration................................................................................................................. 14

6.2.4.1 ASN.1 PDU type constraint declaration ............................................................................................... 14

6.2.4.2 TTCN PDU type constraint declaration................................................................................................ 14

6.2.5 Chaining of constraints............................................................................................................................... 14

6.2.5.1 Static chaining ...................................................................................................................................... 14

6.2.5.2 Dynamic chaining................................................................................................................................. 14

6.2.6 Derived constraints..................................................................................................................................... 15

6.2.7 Parameterized constraints........................................................................................................................... 15

6.2.8 Value assignment ....................................................................................................................................... 15

6.2.8.1 Specific values...................................................................................................................................... 15

6.2.8.2 Matching values.................................................................................................................................... 15

6.3 Dynamic part.................................................................................................................................................... 15

6.3.1 Test cases ................................................................................................................................................... 15

6.3.2 Test steps.................................................................................................................................................... 15

6.3.3 Defaults ...................................................................................................................................................... 16

ETSI
---------------------- Page: 5 ----------------------
SIST EN 300 141-4 V1.2.4:2005
4 EN 300 141-4 V1.2.4 (1998-06)

7 ATS to TP map ......................................................................................................................................16

8 PCTR conformance................................................................................................................................16

9 PIXIT conformance................................................................................................................................16

10 ATS conformance ..................................................................................................................................16

Annex A (normative): Protocol Conformance Test Report (PCTR) proforma.............................17

A.1 Identification summary ..........................................................................................................................17

A.1.1 Protocol conformance test report..................................................................................................................... 17

A.1.2 IUT identification ............................................................................................................................................ 17

A.1.3 Testing environment ........................................................................................................................................ 17

A.1.4 Limits and reservations .................................................................................................................................... 18

A.1.5 Comments ........................................................................................................................................................ 18

A.2 IUT conformance status .........................................................................................................................18

A.3 Static conformance summary.................................................................................................................18

A.4 Dynamic conformance summary............................................................................................................18

A.5 Static conformance review report ..........................................................................................................19

A.6 Test campaign report..............................................................................................................................19

A.7 Observations...........................................................................................................................................20

Annex B (normative): Partial PIXIT proforma................................................................................21

B.1 Identification summary ..........................................................................................................................21

B.2 Abstract test suite summary ...................................................................................................................21

B.3 Test laboratory .......................................................................................................................................21

B.4 Client (of the test laboratory).................................................................................................................22

B.5 System Under Test (SUT)......................................................................................................................22

B.6 Protocol information ..............................................................................................................................23

B.6.1 Protocol identification...................................................................................................................................... 23

B.6.2 Parameter values.............................................................................................................................................. 23

B.6.3 Sending of messages by IUT............................................................................................................................ 23

B.6.4 Configuration of IUT ....................................................................................................................................... 26

B.6.5 Parameter values - information element codings ............................................................................................. 26

Annex C (normative): Abstract Test Suite (ATS).............................................................................27

C.1 The TTCN Graphical form (TTCN.GR)................................................................................................27

C.2 The TTCN Machine Processable form (TTCN.MP) .............................................................................27

Annex D (informative): General structure of ATS .............................................................................28

Annex E (informative): Changes with respect to the previous ETS 300 141-4 ................................29

History..............................................................................................................................................................30

ETSI
---------------------- Page: 6 ----------------------
SIST EN 300 141-4 V1.2.4:2005
5 EN 300 141-4 V1.2.4 (1998-06)
Intellectual Property Rights

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 free of charge from the ETSI Secretariat. Latest updates are available on the

ETSI Web server (http://www.etsi.fr/ipr or http://www.etsi.org/ipr).

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)

which are, or may be, or may become, essential to the present document.
Foreword

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

Protocols and Switching (SPS).

The present document is part 4 of a multi-part standard covering the Digital Subscriber Signalling System No. one

(DSS1) protocol specification for the Integrated Services Digital Network (ISDN) Call Hold (HOLD) supplementary

service, as described below:
Part 1: "Protocol specification";

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 Testing

(PIXIT) proforma specification for the user";

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)

proforma specification for the network".
National transposition dates
Date of adoption of this EN: 19 June 1998
Date of latest announcement of this EN (doa): 30 September 1998
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 March 1999
Date of withdrawal of any conflicting National Standard (dow): 31 March 1999
ETSI
---------------------- Page: 7 ----------------------
SIST EN 300 141-4 V1.2.4:2005
6 EN 300 141-4 V1.2.4 (1998-06)
1 Scope

This fourth part of EN 300 141 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 (as defined in ITU-T Recommendation I.411 [11]) of implementations conforming to the stage three standard for

the Call Hold (HOLD) supplementary service for the pan-European Integrated Services Digital Network (ISDN) by

means of the Digital Subscriber Signalling System No. one (DSS1) protocol, EN 300 141-1 [2].

EN 300 141-3 [4] 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 300 141-1 [2].

2 Normative references
References may be made to:

a) specific versions of publications (identified by date of publication, edition number, version number, etc.), in

which case, subsequent revisions to the referenced document do not apply; or

b) all versions up to and including the identified version (identified by "up to and including" before the version

identity); or

c) all versions subsequent to and including the identified version (identified by "onwards" following the version

identity); or

d) publications without mention of a specific version, in which case the latest version applies.

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

number.

v[1] EN 300 403-1: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System

No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 1:

Protocol specification [ITU-T Recommendation Q.931 (1993), modified]".

[2] EN 300 141-1 (V1.2): "Integrated Services Digital Network (ISDN); Call Hold (HOLD)

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

Protocol specification".

[3] EN 300 141-2 (V1.2): "Integrated Services Digital Network (ISDN); Call Hold (HOLD)

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

Protocol Implementation Conformance Statement (PICS) proforma specification".

[4] EN 300 141-3 (V1.2): "Integrated Services Digital Network (ISDN); Call Hold (HOLD)

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

Suite Structure and Test Purposes (TSS&TP) specification for the user".

[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;

Part 1: Protocol specification".

[6] ISO/IEC 9646-1: "Information Technology - OSI Conformance Testing Methodology and

Framework; Part 1: General Concepts".

[7] ISO/IEC 9646-2: "Information Technology - OSI Conformance Testing Methodology and

Framework; Part 2: Abstract Test Suite Specification".

[8] ISO/IEC 9646-3: "Information Technology - OSI Conformance Testing Methodology and

Framework; Part 3: The Tree and Tabular Combined Notation".

[9] ISO/IEC 9646-4: "Information Technology - OSI Conformance Testing Methodology and

Framework; Part 4: Test realization".
ETSI
---------------------- Page: 8 ----------------------
SIST EN 300 141-4 V1.2.4:2005
7 EN 300 141-4 V1.2.4 (1998-06)

[10] ISO/IEC 9646-5: "Information Technology - OSI Conformance Testing Methodology and

Framework; Part 5: Requirements on test laboratories and clients for the conformance assessment

process".

[11] ITU-T Recommendation I.411 (1993): "ISDN user-network interfaces - Reference configurations".

[12] CCITT Recommendation X.209 (1988): "Specification of Basic Encoding Rules for Abstract

Syntax Notation One (ASN.1)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following definitions apply:
Abstract Test Suite (ATS): See ISO/IEC 9646-1 [6].
Implementation Under Test (IUT): See ISO/IEC 9646-1 [6].
Lower Tester (LT): See ISO/IEC 9646-1 [6].
Point of Control and Observation (PCO): See ISO/IEC 9646-1 [6].
Protocol Implementation Conformance Statement (PICS): See ISO/IEC 9646-1 [6].
PICS proforma: See ISO/IEC 9646-1 [6].

Protocol Implementation eXtra Information for Testing (PIXIT): See ISO/IEC 9646-1 [6].

PIXIT proforma: See ISO/IEC 9646-1 [6].
System Under Test (SUT): See ISO/IEC 9646-1 [6].
Upper Tester (UT): See ISO/IEC 9646-1 [6].
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ASP Abstract Service Primitive
ATM Abstract Test Method
ATS Abstract Test Suite
BER Basic Encoding Rules
ExTS Executable Test Suite
HOLD Call Hold
IE Information Element
IUT Implementation Under Test
LT Lower Tester
MOT Means Of Testing
PCO Point of Control and Observation
PDU Protocol Data Unit
PICS Protocol Implementation Conformance Statement
PIXIT Protocol Implementation eXtra Information for Testing
SUT System Under Test
TCP Test Co-ordination Procedures
TP Test Purpose
TTCN Tree and Tabular Combined Notation
UT Upper Tester
ETSI
---------------------- Page: 9 ----------------------
SIST EN 300 141-4 V1.2.4:2005
8 EN 300 141-4 V1.2.4 (1998-06)
4 Abstract Test Method (ATM)

The remote test method is applied for the HOLD user ATS. The Point of Control and Observation (PCO) resides at the

service access point between layers 2 and 3. 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.
Tester SUT
LT IUT
PCO
Layer 2 Layer 2
Layer 1 Layer 1
Service provider
Figure 1: Remote test method

ISO/IEC 9646-2 [7] allows the informal expression of Test Co-ordination Procedures (TCP) between the System Under

Test (SUT) upper layer(s) and the Lower Tester (LT). In the ATS contained in annex C, TCP is achieved by use of a

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

IUT and consequently, events at this PCO are never used to generate test case verdicts. The use of this O PCO is

regarded as a preferred alternative to the use of the implicit send event, in that it allows the ATS to specify in a clear and

meaningful way what actions are required to be performed on the IUT.
5 Untestable test purposes
There are no untestable test purposes associated with this ATS.
6 ATS conventions

This clause is structured similarly to the structure of a TTCN ATS. However, the names of the subclauses are arranged

in a way more suitable to the present document.
6.1 Declarations part
6.1.1 Type definitions
6.1.1.1 Simple type definitions

Where appropriate, simple types have a length, a value list or a range restriction attached.

Simple types defined as being of some string type (e.g. BIT STRING, OCTET STRING), have a length restriction or a

value list attached.

Simple types, defined as being of INTEGER type, have a value list or a range restriction attached.

ETSI
---------------------- Page: 10 ----------------------
SIST EN 300 141-4 V1.2.4:2005
9 EN 300 141-4 V1.2.4 (1998-06)
6.1.1.2 Structured type definitions
6.1.1.2.1 TTCN structured type definitions
All structured type definitions are provided with a full name.

All elements in every structured type definition, defined as being of some string type (e.g. BIT STRING,

OCTET STRING), have a length restriction attached.

If an element in a structured type definition is defined as being of a referenced type, the (possible) restriction is defined

in that referenced type.

For information elements the identifier, which is unique for each element, has its type defined as a simple type where the

value list is restricted to the single value which is the identifier itself. This has the advantage that it allows a test system

derived from this ATS to easily identify information elements embedded in messages. An ATS where information

element identifiers are represented as unrestricted types can present difficulties for a derived test system in the case

where it needs to find one information element embedded in a number of others and the constraints for the other

elements have the any-or-omit value. In such a case the test system cannot easily find the beginning of each information

element.
6.1.1.2.2 ASN.1 structured type definitions

ASN.1 has been used for three major reasons. First, types defined in ASN.1 can model problems that "pure" TTCN

cannot. For instance, data structures modelling ordered or unordered sequences of data are preferably defined in ASN.1.

Second, ASN.1 provides a better restriction mechanism for type definitions by using sub-type definitions. Third, it is

necessary to use ASN.1 to reproduce the type definitions for remote operation components as specified in the base

standards.

The fact that ASN.1 provides a better restriction mechanism for type definitions is used for the purpose of achieving

type-compatibility.

In table 1, the ASN.1 type BIT7OR15 is defined as being of type BIT STRING with a size constraint attached to it. The

size is determined by the value of CR_LENGTH, a test suite parameter. It can have the value of either 7 or 15. The type

BIT7OR15 is used in the structured type CR, field cr_r allowing this type to represent a Basic Access or a Primary Rate

Access call reference. By using this type definition the field cr_r is always type compatible with values of type

BIT STRING (SIZE(7)) and BIT STRING (SIZE(15)). Another approach to solve this problem would be to define the

type BIT7OR15 as BIT STRING (SIZE(7 | 15)). This type has a small disadvantage compared with the previous one. It

is impossible, in run-time, to determine the actual length of any instance of this type.

Table 1: ASN.1 type definition BIT7OR15
ASN.1 Type Definition
Type Name : BIT7OR15
Comments :
Type Definition
BIT STRING(SIZE(CR_LENGTH))

Table 2 shows a typical use of ASN.1. The CHI element will have two different type definitions depending on whether it

represents basic or primary rate access. In TTCN, this needs to be defined as two different types. In ASN.1 this can be

done in one, the type being a choice of either BASIC_CHI or PRIMARY_CHI. These two types are then (locally)

defined in the same table.
ETSI
---------------------- Page: 11 ----------------------
SIST EN 300 141-4 V1.2.4:2005
10 EN 300 141-4 V1.2.4 (1998-06)
Table 2: ASN.1 type definition CHI
ASN.1 Type Definition
Type Name : CHI
Comments : Info Element Channel Identification
EN 300 403-1 clause 4.5.13
Type Definition
CHOICE {
basic BASIC_CHI,
primary PRIMARY_CHI
-- Local type definitions --
BASIC_CHI ::= SEQUENCE {
chi_i CHI_I, -- Identifier
chi_l BIT STRING(SIZE(8)), -- Length
chi_e3_cs BIT STRING(SIZE(8)) -- Channel selection
PRIMARY_CHI ::= SEQUENCE {
chi_i CHI_I, -- Identifier
chi_l BIT STRING(SIZE(8)), -- Length
chi_e3_p1 BIT STRING(SIZE(4)), -- First nibble of Channel selection
chi_e3_pe BIT STRING(SIZE(1)), -- Preferred/Exclusive Bit
chi_e3_p3 BIT STRING(SIZE(3)), -- Last three bits of Channel selection
chi_e4 BIT STRING(SIZE(8)), -- Channel type
chi_e5_chl BIT STRING(SIZE(1)),
chi_e5_ch2 BIT STRING(SIZE(7)) -- Channel number
Table 3 shows an example of how ASN.1 can be used to model unordered sequences.
Table 3: ASN.1 type definition FIES
ASN.1 Type Definition
Type Name : FIES
Comments :
Type Definition
SET OF FIE

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

...

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