SIST EN 300 356-36 V3.2.2:2003
(Main)Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 3 for the international interface; Part 36: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for supplementary services
Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 3 for the international interface; Part 36: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for supplementary services
Definition of ISUP version 3 tests in order to support interoperability & validation for nodes having implemented supplementary services + CCNR.
Digitalno omrežje z integriranimi storitvami (ISDN) – Signalizacija št. 7 (SS7) – Tretja različica ISDN-uporabniškega dela (ISUP) za mednarodni vmesnik – 36. del: Abstraktni preskušalni niz (ATS) in delna dodatna informacija za preskušanje izvedbe protokola (PIXIT) – Proforma specifikacija za dopolnilne storitve
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SUHVNXãDQMHVWRULWYHIntegrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 3 for the international interface; Part 36: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for supplementary services33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 300 356-36 Version 3.2.2SIST EN 300 356-36 V3.2.2:2003en01-december-2003SIST EN 300 356-36 V3.2.2:2003SLOVENSKI
STANDARD
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)2
Reference REN/SPAN-01037-6 Keywords ATS, ISDN, ISUP, PIXIT, SS7, testing ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)3 Contents Intellectual Property Rights.6 Foreword.6 Introduction.7 1 Scope.8 2 References.8 3 Definitions and abbreviations.10 3.1 Definitions.10 3.2 Abbreviations.11 4 Void.13 5 Implementation under test and test methods.13 5.1 Identification of the system and implementation under test.13 5.2 ATM and testing configuration for ISUP '97.14 5.2.1 Intermediate exchanges.15 5.2.2 Local exchanges.16 5.2.3 Master-slave aspects in the test configuration.19 6 Test Suite Structure (TSS).20 7 Test Purposes (TP).22 7.1 Introduction.22 7.2 Test Purpose (TP) naming convention.22 7.2.1 Source of Test Purpose definition.22 7.2.2 Test Purpose structure.22 7.3 Test Purposes for the Supplementary Services.23 7.3.1 Calling Line Identification Presentation (CLIP).24 7.3.2 Calling line identification restriction (CLIR).31 7.3.3 Connected Line Identification Presentation (COLP).36 7.3.4 Connected Line Identification Restriction (COLR).54 7.3.5 Terminal portability (TP).66 7.3.6 User-To-User Signalling (UUS).76 7.3.6.1 User-To-User Signalling Service 1 (UUS1).76 7.3.6.2 User-To-User Signalling Service 2 (UUS2).100 7.3.6.3 User-To-User Signalling Service 3 (UUS3).116 7.3.7 Closed user group (CUG).130 7.3.8 SUB-addressing (SUB).142 7.3.9 Malicious Call IDentification (MCID).144 7.3.10 CONFerence call, add-on (CONF).154 7.3.11 Explicit call transfer (ECT).175 7.3.12 Call diversion (CFB, CFNR, CFU, CD).208 7.3.13 Call HOLD (HOLD).254 7.3.14 Call Waiting (CW).261 7.3.15 Completion of Calls to Busy Subscribers (CCBS).267 7.3.16 Three party service (3PTY).301 7.3.17 Completion of Calls on No Reply (CCNR).315 8 Test Coverage.348 9 Conformance to the PICS proforma specification.348 Annex A (normative): PICS proforma for ISDN User Part (ISUP) '97 - supplementary services.349 A.1 Instructions for completing the PICS proforma.349 A.1.1 Purposes and structure.349 A.1.2 Abbreviations and conventions.349 SIST EN 300 356-36 V3.2.2:2003
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)4 A.2 Identification of the implementation.351 A.2.1 Date of the statement.351 A.2.2 Implementation Under Test (IUT) identification.351 A.2.3 System Under Test (SUT) identification.351 A.2.4 Product supplier.351 A.2.5 Client.351 A.2.6 ICS contact person.351 A.3 Identification of the reference specification.352 A.4 PICS proforma tables.352 A.4.1 Global statement of conformance.352 A.4.2 Roles.352 A.4.3 Capabilities.352 Annex B (normative): PIXIT proforma for ISDN User Part (ISUP) '97 supplementary services.363 B.1 Identification summary.363 B.2 Abstract test suite summary.363 B.3 Test laboratory.363 B.4 Client identification.363 B.5 System under test.364 B.6 Ancillary protocols.364 B.7 Protocol information for ISUP.364 B.7.1 Protocol identification.364 B.7.2 IUT information - PIXIT proforma tables.364 B.7.2.1 General configuration.364 B.7.2.2 Parameter values.365 B.7.2.3 Timer values.367 B.7.2.4 Other information.367 B.7.2.5 ISDN information.368 Annex C (normative): Protocol Conformance Test Report (PCTR) Proforma for ISDN User Part (ISUP) '97 supplementary services.369 C.1 Identification summary.369 C.1.1 Protocol conformance test report.369 C.1.2 IUT identification.369 C.1.3 Testing environment.369 C.1.4 Limits and reservation.370 C.1.5 Comments.370 C.2 IUT Conformance status.370 C.3 Static conformance summary.370 C.4 Dynamic conformance summary.370 C.5 Static conformance review report.371 C.6 Test campaign report.371 C.7 Observations.381 Annex D (normative): ATS ISDN User Part (ISUP) '97 Supplementary Services.382 D.1 ATS code.382 D.2 Conventions used within the ATS.382 D.2.1 Test suite parameters, constants and variables.382 D.2.2 Test case variables.382 SIST EN 300 356-36 V3.2.2:2003
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)5 D.2.3 ASP constraints.382 D.2.4 Timers.382 D.2.5 Test suite operations.383 D.2.6 Aliases.383 D.2.7 Test case and step identifiers.383 D.2.8 Constraints.383 D.2.9 Dynamic behaviour part.384 D.2.10 Pre-test conditions.384 Annex E (normative): ATS for ISDN User PArt (ISUP) v3 basic call control procedures.385 E.1 The TTCN Graphical form (TTCN.GR).385 E.2 The TTCN Machine Processable form (TTCN.MP).385 Annex F (informative): Bibliography.386 History.387
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)6 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 ETSI 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 (http://www.etsi.org/legal/home.htm). 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 ETSI 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 Services and Protocols for Advanced Networks (SPAN). The present document is part 36 of a multi-part deliverable covering the ISDN User Part (ISUP) version 3 for the international interface, as identified below: Part 1: "Basic services [ITU-T Recommendations Q.761 to Q.764 (1999) modified]"; Part 2: "ISDN supplementary service [ITU-T Recommendation Q.730 (1999) modified]"; Part 3: "Calling Line Identification Presentation (CLIP) supplementary service [ITU-T Recommendation Q.731, clause 3 (1993) modified]"; Part 4: "Calling Line Identification Restriction (CLIR) supplementary service [ITU-T Recommendation Q.731, clause 4 (1993) modified]"; Part 5: "Connected Line Identification Presentation (COLP) supplementary service [ITU-T Recommendation Q.731, clause 5 (1993) modified]"; Part 6: "Connected Line Identification Restriction (COLR) supplementary service [ITU-T Recommendation Q.731, clause 6 (1993) modified]"; Part 7: "Terminal Portability (TP) supplementary service [ITU-T Recommendation Q.733, clause 4 (1993) modified]"; Part 8: "User-to-User Signalling (UUS) supplementary service [ITU-T Recommendation Q.737, clause 1 (1997) modified]"; Part 9: "Closed User Group (CUG) supplementary service [ITU-T Recommendation Q.735, clause 1 (1993) modified]"; Part 10: "Subaddressing (SUB) supplementary service [ITU-T Recommendation Q.731, clause 8 (1992) modified]"; Part 11: "Malicious Call Identification (MCID) supplementary service [ITU-T Recommendation Q.731,
clause 7 (1997) modified]"; Part 12: "Conference Call, add-on (CONF) supplementary service [ITU-T Recommendation Q.734,
clause 1 (1993) and implementors guide (1998) modified]"; Part 14: "Explicit Call Transfer (ECT) supplementary service [ITU-T Recommendation Q.732, clause 7 (1996) and implementors guide (1998) modified]"; Part 15: "Diversion supplementary service [ITU-T Recommendation Q.732, clauses 2 to 5 (1999) modified]"; Part 16: "Call Hold (HOLD) supplementary service [ITU-T Recommendation Q.733, clause 2 (1993) modified]"; Part 17: "Call Waiting (CW) supplementary service [ITU-T Recommendation Q.733, clause 1 (1992) modified]"; SIST EN 300 356-36 V3.2.2:2003
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)7 Part 18: "Completion of Calls to Busy Subscriber (CCBS) supplementary service [ITU-T Recommendation Q.733, clause 3 (1997) modified]"; Part 19: "Three-Party (3PTY) supplementary service [ITU-T Recommendation Q.734, clause 2 (1996) and implementors guide (1998) modified]"; Part 20: "Completion of Calls on No Reply (CCNR) supplementary service [ITU-T Recommendation Q.733, clause 5 (1999) modified]"; Part 21: "Anonymous Call Rejection (ACR) supplementary service [ITU-T Recommendation Q.731,
clause 4 (1993)]"; Part 31: "Protocol Implementation Conformance Statement (PICS) proforma specification for basic services"; Part 32: "Test Suite Structure and Test Purposes (TSS&TP) specification for basic services"; Part 33: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for basic services"; Part 34: "Protocol Implementation Conformance Statement (PICS) proforma specification for supplementary services"; Part 35: "Test Suite Structure and Test Purposes (TSS&TP) specification for supplementary services"; Part 36: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for supplementary services". NOTE: Parts 13 and 22 to 30 have not been issued.
National transposition dates Date of adoption of this EN: 21 September 2001 Date of latest announcement of this EN (doa): 31 December 2001 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
30 June 2002 Date of withdrawal of any conflicting National Standard (dow): 30 June 2002
Introduction The present document contains the conformance test specification for ISUP '97 supplementary services. The present document presents an Abstract Test Suite (ATS), written in Tree And Tabular Combined Notation (TTCN). The main body of the present document presents the requirements regarding the chosen test method, conventions used within the ATS, the test suite structure and the Test Purposes. The annexes present the Protocol Implementation Conformance Statements (PICS), the Protocol Implementation eXtra Information for Testing (PIXIT), Protocol Conformance Test Report (PCTR) and the ATS for ISUP '97 supplementary services, the last one being available on electronic media. SIST EN 300 356-36 V3.2.2:2003
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)8 1 Scope The present document contains the validation (conformance) test specification for ISUP '97 supplementary services defined in ITU-T Recommendation Q.730 [1]. The present document presents an Abstract Test Suite (ATS) for ISUP '97 supplementary services, written in TTCN, see ISO/IEC 9646-5 [27]. The present document applies only to exchanges having implemented the ISUP '97 protocol specification. It is applicable for validation testing of all types of exchanges as defined in the ISUP '97 protocol specification. The present document does not deal with compatibility testing. The main text part of the present document presents the requirements regarding the chosen test method, conventions used within the ATS, the Test Suite Structure and Test Purposes (TSS&TP) for ISUP'97 supplementary services. The annexes present the Protocol Implementation Conformance Statements (PICS), the Protocol Implementation eXtra Information for Testing (PIXIT), Protocol Conformance Test Report (PCTR) and the ATS for ISUP '97 supplementary services, the last one being available on electronic media. Annex A provides the Protocol Implementation Conformance Statement (PICS) proforma for the ISUP'97 supplementary services defined in compliance with the relevant requirements and in accordance with the guidance given in ISO/IEC 9646-7 [28]. This statement, of which capabilities and options of a telecommunication specification have been implemented, is necessary for evaluating the conformance of a particular implementation. The supplier of an implementation that is claimed to conform to the ISUP'97 supplementary services reference specification ITU-T Recommendation Q.730 [1] is required to complete a copy of the PICS proforma provided in annex A. Annex B provides the Protocol Implementation eXtra Information for Test (PIXIT) proforma, needed as a preparation for testing. Annex C provides the Protocol Conformance Test Report (PCTR) proforma, used for evaluating the results of the testing campaign. Annex D explains how to get hold of the actual ATS, which is delivered in electronic form only. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. • For a specific reference, subsequent revisions do not apply. • For a non-specific reference, the latest version applies. [1] ITU-T Recommendation Q.730: "ISDN user part supplementary services". [2] ITU-T Recommendation Q.731: "Stage 3 description for number identification supplementary services using Signalling System No. 7". [3] ITU-T Recommendation Q.731.3 (1993): "Calling line identification presentation (CLIP)". [4] ITU-T Recommendation Q.731.4 (1993): "Calling line identification restriction (CLIR)". [5] ITU-T Recommendation Q.731.5 (1993): "Connected line identification presentation (COLP)". [6] ITU-T Recommendation Q.731.6 (1993): "Connected line identification restriction (COLR)". [7] ITU-T Recommendation Q.731.7 (1997): "Malicious call identification (MCID)". [8] ITU-T Recommendation Q.731.8 (1992): "Sub-addressing (SUB)". SIST EN 300 356-36 V3.2.2:2003
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)9 [9] ITU-T Recommendation Q.732: "Stage 3 description for call offering supplementary services using Signalling System No. 7". [10] ITU-T Recommendation Q.732.7: "Explicit Call Transfer". [11] ITU-T Recommendation Q.733.2 (1993): "Call hold (HOLD)". [12] ITU-T Recommendation Q.733.3 (1997): "Completion of calls to busy subscriber (CCBS)". [13] ITU-T Recommendation Q.733.4 (1993): "Terminal portability (TP)". [14] ITU-T Recommendation Q.733.5 (1999): "Completion of calls on no reply". [15] ITU-T Recommendation Q.734.1 (1993): "Conference calling". [16] ITU-T Recommendation Q.734.2 (1996): "Three-party service". [17] ITU-T Recommendation Q.735.1(1993): "Closed user group (CUG)". [18] ITU-T Recommendation Q.737.1 (1997): "User-to-user signalling (UUS)". [19] ITU-T Recommendation Q.761 (1997): "Signalling System No. 7 - ISDN User Part functional description". [20] ITU-T Recommendation Q.762 (1997): "Signalling System No. 7 - ISDN User Part general functions of messages and signals". [21] ITU-T Recommendation Q.763: "Signalling System No. 7 - ISDN User Part formats and codes". [22] ITU-T Recommendation Q.764 (1997): "Signalling System No. 7 - ISDN User Part signalling procedures". [23] ITU-T Recommendation Q.785.2: "ISUP'97 supplementary services – Test suite structure and test purposes (TSS & TP)". [24] ISO/IEC 9646-1 (1994): "Information technology - Open Systems Interconnection - Conformance testing methodology and framework - Part 1: General concepts". [25] ISO/IEC 9646-2 (1994): "Information technology - Open Systems Interconnection - Conformance testing methodology and framework - Part 2: Abstract Test Suite specification". [26] ISO/IEC 9646-3: "Information technology - Open Systems Interconnection - Conformance testing methodology and framework - Part 3: The Tree and Tabular Combined Notation (TTCN)". [27] ISO/IEC 9646-5 (1996): "Information technology - Open Systems Interconnection - Conformance testing methodology and framework - Part 5: Requirements on test laboratories and clients for the conformance assessment process". [28] ISO/IEC 9646-7 (1995): "Information technology - Open Systems Interconnection - Conformance testing methodology and framework - Part 7: Implementation Conformance Statements". [29] ITU-T Recommendation Q.788: "User-network-interface to user-network-interface compatibility test specifications for ISDN, non-ISDN and undetermined accesses interworking over international ISUP". [30] ITU-T Recommendation E.164 (1997): "The international public telecommunication numbering plan". [31] ITU-T Recommendation Q.701: "Functional description of the message transfer part (MTP) of Signalling System No. 7". [32] ITU-T Recommendation Q.707: "Testing and maintenance". [33] ITU-T Recommendation Q.733: "Stage 3 description for call completion supplementary services using Signalling System No. 7". SIST EN 300 356-36 V3.2.2:2003
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)10 [34] ITU-T Recommendation Q.737: "Stage 3 description for additional information transfer supplementary services using Signalling System No. 7". [35] ITU-T Recommendation Q.735: "Stage 3 description for community of interest supplementary services using Signalling System No. 7". [36] ITU-T Recommendation Q.734: "Stage 3 description for multiparty supplementary services using Signalling System No. 7". 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: • terms defined in ISDN User Part (ISUP) reference specification ITU-T Recommendation Q.730 [1]; • terms defined in ISO/IEC 9646-1 [24], ISO/IEC 9646-3 [26] and in ISO/IEC 9646-7 [28]. In particular, the following terms apply: Abstract Test Case (ATC): complete and independent specification of the actions required to achieve a specific Test Purpose, defined at the level of abstraction of a particular Abstract Test Method, starting in a stable testing state and ending in a stable testing state (see ISO/IEC 9646-2, clause 3.3.3) Abstract Test Method (ATM): description of how an IUT is to be tested, given at an appropriate level of abstraction to make the description independent of any particular realization of a Means of Testing, but with enough detail to enable abstract test cases to be specified for this method (see ISO/IEC 9646-2, clause 3.3.5) Abstract Test Suite (ATS): test suite composed of abstract test cases (see ISO/IEC 9646-2, clause 3.3.6) Implementation Under Test (IUT): implementation of one or more OSI protocols in an adjacent user/provider relationship, being part of a real open system which is to be studied by testing (see ISO/IEC 9646-2, clause 3.3.43) ISDN number: number conforming to the numbering and structure specified in ITU-T Recommendation E.164 Means of Testing (MOT): combination of equipment and procedures that can perform the derivation, selection, parameterization and execution of test cases, in conformance with a reference standardized ATS, and can produce a conformance log (see ISO/IEC 9646-2, clause 3.3.54) PICS proforma: document, in the form of a questionnaire, which when completed for an implementation or system becomes the PICS PIXIT proforma: document, in the form of a questionnaire, which when completed for the IUT becomes the PIXIT point of control and observation: point within a testing environment where the occurrence of test events is to be controlled and observed, as defined in an Abstract Test Method (see ISO/IEC 9646-2, clause 3.3.64) pre-test condition: setting or state in the IUT which cannot be achieved by providing stimulus from the test environment Protocol Implementation Conformance Statement (PICS): statement made by the supplier of a protocol claimed to conform to a given specification, stating which capabilities have been implemented (see ISO/IEC 9646-2, clauses 3.3.39 and 3.3.80) Protocol Implementation eXtra Information for Testing (PIXIT): statement made by a supplier or implementor of an IUT (protocol) which contains or references all of the information related to the IUT and its testing environment, which will enable the test laboratory to run an appropriate test suite against the IUT (see ISO/IEC 9646-2, clauses 3.3.41 and 3.3.81) SIST EN 300 356-36 V3.2.2:2003
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)11 System Under Test (SUT): real open system in which the IUT resides (see ISO/IEC 9646-2, clause 3.3.103) user: access protocol entity at the User side of the user-network interface where a T reference point or coincident S and T reference point applies 3.2 Abbreviations The ISUP message acronyms can be found in table 2 of ITU-T Recommendation Q.762 [20]. For the purposes of the present document, the following abbreviations apply: 3PTY Three Party service addCgPN additional Calling Party Number addConNb additional Connected Number AdSg Address Signals APRI Address Presentation Restricted Indicator ASE Application Service Entity ASP Abstract Service Primitive ATC Abstract Test Case ATM Abstract Test Method ATP Access Transport Parameter ATS Abstract Test Suite BCI Backward Call Indicators CC Country Code CCBS Completion of Calls to Busy Subscriber CCBSpar CCBS parameter CD Call Deflection CDInf Call Diversion Information CDIV Call DIVersion CDmo Call Diversion may occur CdPSI Called Party's Status Indicator CFB Call Forwarding Busy CFNR Call Forwarding No Reply CFU Call Forwarding Unconditional CgPN Calling Party Number CHInf Call History Information CIC Circuit Identification Code CLI Calling Line Identity CLIP Calling Line Identification Presentation
CLIR Calling Line Identification Restriction
CntrlE Controlling Exchange COL Connected Line Identity COLP Connected Line Identification Presentation
COLR Connected Line Identification Restriction
CONF Conference call, add-on ConNb Connected Number CTNb Call Transfer Number CTRef Call Transfer Reference CUG Closed User Group CUGIC CUG Interlock Code CW Call Waiting DDI Direct Dialling-In DLE Destination Local Exchange DSS1 Digital Subscriber System No. 1 ECT Explicit Call Transfer FCI Forward Call Indicators GenNb Generic Number GenNot Generic Notification HOLD Call Hold IA Incoming Access ICB Incoming Calls Barred SIST EN 300 356-36 V3.2.2:2003
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)12 ICS Implementation Conformance Statement IncIE Incoming International Exchange IntermE Intermediate Exchange IPI ISUP Preference Indicator ISDN Integrated Services Digital Network ISUP ISDN User Part
ITE International Transit Exchange IUT Implementation Under Test IWorkE Interworking Exchange LAPD Link Access Protocol for the D-channel LOPInd LOop Prevention Indicators LT Lower Tester MCID Malicious Call Identification MOT Means Of Testing MSN Multiple Subscriber Number MTC Main Test Component MTP Message Transfer Part NNI Network-Network Interface NoInd No Indication NSO Notification Subscription Option NTE National Transit Exchange OA Outgoing Access OBCI Optional Backward Call Indicators OFCI Optional Forward Call Indicators OriCdNb Original Called Number PCO Point of Control and Observation PCTR Protocol Conformance Test Report PDC Propagation Delay Counter PDU Protocol Data Unit PICS Protocol Implementation Conformance Statement PIXIT Protocol Implementation eXtra Information for Testing PSTN Public Switched Telephone Network OLE Originating Local Exchange OutIE Outgoing International Exchange RgInd Redirecting Indicator RgNb Redirecting Number RnCnt Redirection Counter RnInf Redirection Information RnNb Redirection Number RnNbRes Redirection Number Restriction RnReas Redirection Reason SCCP Signalling Connection Control Part ScrI Screening Indicator SCS System Conformance Statement ServAct Service Activation SP Signalling Point SUB Sub-addressing SUT System Under Test TCAP Transaction Capabilities Application Part TCP Test Coordination Procedures TP Terminal Portability TP Test Purpose (context dependent) TSS Test Suite Structure TSS&TP Test Suite Structure and Test Purposes TTCN Tree and Tabular Combined Notation UNI User-Network interface USI User Service Information USIp User Service Information prime UUInd User-to-User Indicators UUInf User-to-User Information UUS User-to-User Signalling UUS1 User-to-User Signalling service 1 SIST EN 300 356-36 V3.2.2:2003
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)13 UUS2 User-to-User Signalling service 2 UUS3 User-to-User Signalling service 3 4 Void
5 Implementation under test and test methods 5.1 Identification of the system and implementation under test The System Under Test (SUT) is an exchange. The Implementation Under Test (IUT) is the ISUP '97 implementation in this exchange, mainly the part responsible for the supplementary services functionality, as shown in figure 1.
ISUP'97 SUT IUT Exchange supplementary services Access ISUP ISUP
ISUP
- ISDN User Part IUT
- Implementation Under Test SUT
- System Under Test Figure 1 The ISUP signalling protocol can be observed on the SS No.7 link on the Network-Network Interface (NNI). The effects of signalling procedures of the ISDN User Part can be observed on the circuits controlled by the ISUP on the NNI. The ISUP implementation will in some exchanges have to interwork with the Access signalling system on the User-Network Interface (UNI) and involve call handling in order to establish end-to-end connections. From the ISUP reference standard several types of exchanges (or roles) can be identified as presented in figure 2. SIST EN 300 356-36 V3.2.2:2003
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)14 OLEDLENTEOutIEITEIncIEAccessAccessnationalnetworknationalnetworkinternationalnetworkintermediatelocallocalTransitGatewayTransitGatewayOLE - Original Local ExchangeNTE - National Transit ExchangeOutIE - Outgoing International ExchangeITE - International Transit ExchangeIncIE - Incoming International ExchangeDLE - Destination Local ExchangeFig 2/Q.785.2 Figure 2: Roles of exchanges The exchanges can be divided in two main groups according to their functionality: local exchanges, where calls originate and terminate, and intermediate exchanges, with transit functionality. Local exchanges are national, i.e. belong to a national network. Intermediate exchanges are national or international. The international intermediate exchanges which permit access to the international network are the gateway exchanges (incoming and outgoing), also called ISCs - international switching centers. A particularity for some supplementary services, e.g. call diversion services, is that a local exchange is not only originator/terminator of the call but also mediator between two far-end local exchanges. The roles of the exchanges are summarized in table 1. Table 1: Roles of exchanges
Local Intermediate Exchange
Exchange National International Originating Local Exchange OLE
Transit Exchange
NTE ITE Incoming/Gateway Exchange
IncIE Outgoing/Gateway Exchange
OutIE Destination Local Exchange DLE
5.2 ATM and testing configuration for ISUP '97 The Abstract Test Method (ATM) chosen for the ISUP '97 supplementary services testing specification is the distributed multi-party test method. The ATM is defined at an appropriate level of abstraction so that the test cases may be specified appropriately, without adding restrictions to the implementation under test. The testing architectures are described in the following clauses. The ATS is written in concurrent TTCN. SIST EN 300 356-36 V3.2.2:2003
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)15 5.2.1 Intermediate exchanges The configuration proposed for testing intermediate exchanges is shown in figure 3. In order to test the protocol and functionality of transit and gateway exchanges one needs to consider the incoming and outgoing side of the SUT. SP BIUTLTNetwork service providerTCPCABLABLTISUP linkCircuitsLTLTPhysical aspectsCircuitsISUP linkNetwork service providerSP CCACLACSP AIUT - Implementation Under TestLT - Lower TesterPCO - Point of Control and ObservationSP - Signalling PointTCP - Test Coordination ProceduresLAB - PCO for signalling link ABCAB - PCO for AB circuitsLAC - PCO for signalling link ACCAC -PCO for AC circuits Figure 3: ISUP test method for intermediate exchanges The IUT is observed and controlled from two signalling links with ISUP associated circuits. The Points of Control and Observation (PCO) are labelled LAB and CAB on one side, and LAC and CAC on the other.
The LAB and LAC PCOs are used by the Lower Testers (LT) for controlling the ISUP signalling link, whereas the CAB and CAC PCOs are used by the lower testers for observing circuit related events, such as connectivity, echo control check, alerting tone, etc. The ISUP PDUs to be sent and observed on the LAB PCO side allow for PDU constraints to be specified and coded down to the bit-level. The underlying network service provider is the Message Transfer Part (MTP) protocol as specified in the ITU-T Recommendations Q.701 [31] and Q.707 [32]. Figure 4 shows the actual used configuration for intermediate exchanges, with a Main Testing Component (MTC), responsible for the A-B interface and a slave Parallel Testing Component (PTC), responsible for the C-A interface. The Test Coordination Procedures (TCP) allow for communication between the testers. The test components are mostly implicitly coordinated (asynchronously); the TCPs are only used when it is necessary to obtain the verdict from the parallel test component. SIST EN 300 356-36 V3.2.2:2003
ETSI ETSI EN 300 356-36 V3.2.2 (2001-09)16 Network service providerCABLABTCPPTCNetwork service providerSP CCACLACISUPsignalling,circuitsIUTSP BMTCISUPsignalling,circuitsSP AIUT - Implementation Under TestMTC - Main Test ComponentPCO - Point of Control and ObservationPTC - Parallel Test ComponentSP - Signalling PointLAB - PCO for signalling link ABCAB - Circuit PCO on AB interfaceLAC - PCO for signalling link ACCAC - Circuit PCO on AC interfaceTCP - Test Coordination ProceduresFig 4/Q.785.2 Figure 4: ISUP test configuration for intermediate exchanges 5.2.2 Local exchanges When testing a local exchange as specified in the reference standard, it is difficult, if not impossible, to observe only ISUP PDUs, if functionality such as connectivity, tones and announcements etc. associated with protocol events is to be considered and used to assign verdicts. The reference standard often refers to actions or events initiated by or to be observed by the calling or called user. A Point of Control of Observation (PCO) from ISUP (IUT) to the access side is needed, e.g. for stimulating the local exchange to originate a call (send an IAM). Another PCO is needed to check connectivity or generated tones by the local exchange. There is no exposed interface from ISUP (the IUT) towards the access side. For practical testing purposes the natural choice is the access interface. It is therefore reasonable to make use of the access interface (e.g. the user access interface DSS1) as a PCO and to use existing naming conventions for the Abs
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