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PSIST I-ETS 300 322:1996
01-oktober-1996
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Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one
(DSS1); Abstract Test Suite (ATS) specification for signalling network layer protocol for
circuit-mode basic call control (user)
Ta slovenski standard je istoveten z: I-ETS 300 322 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
PSIST I-ETS 300 322:1996 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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PSIST I-ETS 300 322:1996
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PSIST I-ETS 300 322:1996
INTERIM
EUROPEAN I-ETS 300 322
TELECOMMUNICATION May 1995
STANDARD
Source: ETSI TC-SPS Reference: DI/SPS-05002
ICS: 33.080
Key words: ISDN, DSS1, ATS, layer 3, basic, primary rate, access, user
Integrated Services Digital Network (ISDN);
Digital Subscriber Signalling System No. one (DSS1);
Abstract Test Suite (ATS) specification for signalling network
layer protocol for circuit-mode basic call control (user)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [email protected]
Tel.: +33 92 94 42 00 - Fax: +33 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 1995. All rights reserved.
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Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.
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Contents
Foreword.5
1 Scope .7
2 Normative references.7
3 Definitions.8
4 Abbreviations.9
5 Introduction to the ATS.9
5.1 General aspects of test suites .9
5.2 Test suite description.10
5.2.1 References to relevant base standard .10
5.2.2 Test case selection and parameterization.10
5.2.3 Test method used.10
5.2.4 Overall structure of the test suite.10
5.2.4.1 Overview part.10
5.2.4.1.1 Objective.10
5.2.4.1.2 Specific name constructs.10
5.2.4.2 Declaration part .10
5.2.4.2.1 Objective.10
5.2.4.2.2 Specific name constructs.10
5.2.4.3 Constraint part .11
5.2.4.3.1 Objective.11
5.2.5.3.2 Specific name constructs.11
5.2.5.4 Dynamic part.11
5.2.5.4.1 Objective.11
5.2.5.4.2 Specific name constructs.11
Annex A (normative): TTCN GR for basic access.13
A.1 Overview part .13
A.2 Declarations part .44
A.3 Constraints part .63
A.4 Dynamic part .124
Annex B (normative): TTCN GR for primary rate access.274
B.1 Overview part .274
B.2 Declarations part .303
B.3 Constraints part .322
B.4 Dynamic part .384
Annex C (normative): TTCN MP files 531
Annex D (informative): Cross reference list for basic access ATS .532
D.1 Constraint cross reference .532
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D.2 Test step cross reference. 536
Annex E (informative): Cross reference list for primary rate access ATS . 540
E.1 Constraint cross reference . 540
E.2 Test step cross reference. 544
History. 548
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Foreword
This Interim European Telecommunication Standard (I-ETS) has been produced by the Signalling
Protocols and Switching (SPS) Technical Committee of the European Telecommunications Standards
Institute (ETSI), based upon the layer 3 Abstract Test Suite (ATS) developed by the Conformance Test
Specification (CTS2) ISDN project.
An ETSI standard may be given I-ETS status either because it is regarded as a provisional solution ahead
of a more advanced standard, or because it is immature and requires a "trial period". The life of an I-ETS
is limited to three years after which it can be converted into an ETS, have it's life extended for a further
two years, be replaced by a new version or, be withdrawn.
This I-ETS forms part of a set of I-ETSs completing the documentation of ETS 300 102-1 (ISDN signalling
network layer protocol) as specified in ISO/IEC 9646-1 (e.g. conformance testing) as follows:
I-ETS 300 314: "Protocol Implementation Conformance Statement (PICS) proforma
specification (basic access, user)";
I-ETS 300 315: "PICS proforma specification (primary rate access, user)";
I-ETS 300 316: "PICS proforma specification (basic access, network)";
I-ETS 300 317: "PICS proforma specification (primary rate access, network)";
I-ETS 300 318: "Partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma
specification (basic access, user)";
I-ETS 300 319: "Partial PIXIT proforma specification (primary rate access, user)";
I-ETS 300 322: "Abstract test suite specification (user)".
This I-ETS presents the Abstract Test Suite (ATS) for the user-network interface layer 3 specification for
basic call control described in Tree and Tabular Combined Notation (TTCN) for an ISDN user side
terminal equipment using ISDN basic or primary rate access. This test suite aligns with the principles
defined in Open Systems Integration (OSI) conformance testing methodology and framework
(ISO/IEC 9646-3) using the remote single layer test methodology.
This ATS is specified for both the basic and primary rate access. It is based on the protocol standard
ETS 300 102 and references Protocol Implementation Conformance Statement (PICS) proforma
specifications I-ETS 300 314 and I-ETS 300 315 and partial Protocol Implementation eXtra Information for
Testing (PIXIT) proforma specifications I-ETS 300 318 and I-ETS 300 319.
The ATS TTCN Graphical Representation (GR) is contained in annexes A and B of this I-ETS. The
identification of the associated Machine Processable (MP) files is contained in annex C of this I-ETS.
Announcement date
Date of latest announcement of this I-ETS (doa): 31 August 1995
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1 Scope
This Interim European Telecommunication Standard (I-ETS) specifies the Abstract Test Suite (ATS)
required to check for full conformance to the stage three of circuit-mode on-demand basic
telecommunication services for the pan-European Integrated Services Digital Network (ISDN) as provided
by European telecommunications operators at the T reference point or coincident S and T reference
points as defined in ITU-T Recommendation I.411 [13] by means of the Digital Subscriber Signalling
System No. one (DSS1).
In addition, the ATS contained in this I-ETS specifies the conformance tests for the protocol requirements
at the T reference point where the service is provided to the user via a private ISDN.
The ATS is specified for both the basic and primary rate access and is based on the protocol as specified
in ETS 300 102-1 [1].
This I-ETS is applicable to a terminal equipment representing a Terminal Equipment type 1 (TE1),
Terminal Adaptor (TA) or Network Termination type 2 (NT2) functional entity.
2 Normative references
This I-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 I-ETS only when incorporated in it by amendment or revision. For undated references the
latest edition of the publication referred to applies.
[1] ETS 300 102-1 (1990): "Integrated Services Digital Network (ISDN); User-
network interface layer 3 specifications for basic call control".
[2] ETS 300 102-2 (1990): "Integrated Services Digital Network (ISDN); User-
network interface layer 3 specifications for basic call control; Specification
Description Language (SDL) diagrams".
[3] ETS 300 196-1 (1993): "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".
[4] I-ETS 300 314 (1994): "Integrated Services Digital Network (ISDN); Digital
Subscriber Signalling System No. one (DSS1); Protocol Implementation
Conformance Statement (PICS) proforma specification for signalling network
layer protocol for circuit-mode basic call control (basic access, user)".
[5] I-ETS 300 315 (1994): "Integrated Services Digital Network (ISDN); Digital
Subscriber Signalling System No. one (DSS1); Protocol Implementation
Conformance Statement (PICS) proforma specification for signalling network
layer protocol for circuit-mode basic call control (primary rate access, user)".
[6] I-ETS 300 318 (1995): "Integrated Services Digital Network (ISDN); Digital
Subscriber Signalling System No. one (DSS1); Partial Protocol Implementation
eXtra Information for Testing (PIXIT) proforma specification for signalling
network layer protocol for circuit-mode basic call control (basic access, user)".
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[7] I-ETS 300 319 (1995): "Integrated Services Digital Network (ISDN); Digital
Subscriber Signalling System No. one (DSS1); Partial Protocol Implementation
eXtra Information for Testing (PIXIT) proforma specification for signalling
network layer protocol for circuit-mode basic call control (primary rate access,
user)".
[8] ISO/IEC 9646-1 (1991): "Information technology - Open Systems
Interconnection - Conformance testing methodology and framework - Part 1:
General concepts".
[9] ISO/IEC 9646-2 (1991): "Information technology - Open Systems
Interconnection - Conformance testing methodology and framework - Part 2:
Abstract test suite specification".
[10] ISO/IEC DIS 9646-3 (1989): "Information technology - Open Systems
Interconnection - Conformance testing methodology and framework - Part 3:
The Tree and Tabular Combined Notation (TTCN)".
[11] ISO/IEC 9646-3 (1992): "Information technology - Open Systems
Interconnection - Conformance testing methodology and framework - Part 3:
The Tree and Tabular Combined Notation (TTCN)".
[12] ITU-T Recommendation I.112 (1993): "Vocabulary of terms for ISDNs".
[13] ITU-T Recommendation I.411 (1993): "ISDN user-network interfaces -reference
configurations".
[14] CCITT Recommendation I.430 (1988): "ISDN basic user-network interface -
Layer 1 specification".
3 Definitions
For the purposes of this I-ETS, the following definitions apply:
Abstract Test Suite (ATS): See ISO/IEC 9646-2 [9].
basic access: See CCITT Recommendation I.430 [14], annex E, definition 101.
client: See ISO/IEC 9646-1 [8].
Integrated Services Digital Network (ISDN): See ITU-T Recommendation I.112 [12], definition 308.
Network Termination type 2 (NT2): See ITU-T Recommendation I.411 [13], subclause 3.4.2.
primary rate access: See CCITT Recommendation I.430 [14], annex E, definition 102.
Protocol Implementation Conformance Statement (PICS): See ISO/IEC 9646-1 [8].
Protocol Implementation eXtra Information for Testing (PIXIT): See ISO/IEC 9646-1 [8].
Terminal Adaptor (TA): See ITU-T Recommendation I.411 [13], subclause 3.4.4.
Terminal Equipment type 1 (TE1): See ITU-T Recommendation I.411 [13], subclause 3.4.3.1.
test laboratory: See ISO/IEC 9646-1 [8].
user: The DSS1 protocol entity at the user side of the user-network interface.
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4 Abbreviations
For the purposes of this I-ETS, the following abbreviations apply:
ATS Abstract Test Suite
DSS1 Digital Subscriber Signalling System No. one
ISDN Integrated Services Digital Network
IUT Implementation Under Test
MP Machine Processable
NT2 Network Termination type 2
PDU Protocol Data Unit
PICS Protocol Implementation Conformance Statement
PIXIT Protocol Implementation eXtra Information for Testing
TA Terminal Adaptor
TE1 Terminal Equipment type one
TTCN Tree and Tabular Combined Notation
5 Introduction to the ATS
This ATS defines the test specification for the ISDN DSS1 layer 3 protocol (ETS 300 102-1 [1]) and is
presented as tables in the form of Tree and Tabular Combined Notation (TTCN) tables.
In order for a test laboratory to perform a test campaign based on the ATS, the apparatus supplier (test
laboratory client) shall provide for the Implementation Under Test (IUT) information regarding the
implementation of the protocol within the terminal, i.e. the PICS (conformant to the PICS proforma
specified in I-ETS 300 314 [4] or I-ETS 300 315 [5]) and information regarding the man-machine interface,
i.e. the PIXIT (conformant to the partial PIXIT proforma specified in I-ETS 300 318 [6] or
I-ETS 300 319 [7]).
Conformance testing involves testing both the capabilities and behaviour of an implementation and
checking what is observed both against the conformance requirements in the relevant standard (in this
case ETS 300 102-1 [1]) and what the implementor states the implementation's capabilities are.
Conformance testing does not include assessment of the performance nor the robustness or reliability of
an implementation. It cannot give judgements on the physical realization of the abstract service primitives,
how a system is implemented, how it provides any requested service, nor the environment of the protocol
implementation.
As discussed in ISO/IEC 9646-1 [8], the purpose of conformance testing is to increase the probability that
different implementations are able to interwork. However, it should be borne in mind that the complexity of
most protocols makes exhaustive testing impractical on both technical and economic grounds. Also,
testing cannot guarantee conformance to a specification since it detects errors rather than their absence.
Thus conformance testing alone cannot guarantee interworking. What it does, is give confidence that an
implementation has the required capabilities and that its behaviour conforms consistently in representative
instances of communication.
5.1 General aspects of test suites
This I-ETS presents the ATS for an ISDN terminal equipment (TE1 or TA or NT2) for ISDN layer 3 basic
or primary rate access.
The ATS is based on ETS 300 102-1 [1] and ETS 300 102-2 [2] and aligns with the principles in
ISO/IEC 9646-3 [11]. The ATS is written in TTCN according to ISO/IEC DIS 9646-3 [10].
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The ATS is presented in five annexes:
annex A: TTCN GR for basic access;
annex B: TTCN GR for primary rate access;
annex C: TTCN MP files;
annex D: Cross reference list for basic access ATS;
annex E: Cross reference list for primary rate access ATS.
A TTCN ATS is divided into four parts as follows:
- overview part;
- declaration part;
- constraint part;
- dynamic part.
5.2 Test suite description
5.2.1 References to relevant base standard
The ATS references ETS 300 102-1 [1].
5.2.2 Test case selection and parameterization
Use of PICS and PIXIT is made for test case selection and parameterization.
5.2.3 Test method used
The selected abstract test method to which this test suite applies is the remote single layer test method.
Information on this test method is given in ISO/IEC 9646-2 [9].
5.2.4 Overall structure of the test suite
5.2.4.1 Overview part
5.2.4.1.1 Objective
This part gives some overall information about the test suite. The tables give information about the name,
reference and the test method of the test suite and describes the test cases, the test steps and the
defaults.
5.2.4.1.2 Specific name constructs
The specific name construct is explained in the relevant parts.
5.2.4.2 Declaration part
5.2.4.2.1 Objective
The aim of this part is to introduce all the type definitions needed in parts three and four. For each
variable, constant, information element, Protocol Data Unit (PDU) etc. the type is to be given (Boolean,
Integer, Octet string, Bit string, IA5 string, etc.).
5.2.4.2.2 Specific name constructs
The name of the information elements is shortened in a way as to avoid confusion.
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5.2.4.3 Constraint part
5.2.4.3.1 Objective
All the values needed for the execution of the test suite are given here or declared as parameters. PDUs
needed in the dynamic part are described with their required values and parameters.
5.2.5.3.2 Specific name constructs
The names of the PDUs have been shortened to two or three letters and a digit. Error PDUs start with
ERR and are followed by a number.
5.2.5.4 Dynamic part
5.2.5.4.1 Objective
This part describes the sequence of sending and receiving events and the linked verdicts for each test
case, test step or default. Some mechanisms have been introduced to allow the reception of particular
PDUs as described in ETS 300 196-1 [3].
5.2.5.4.2 Specific name constructs
The names of the test cases, steps or defaults start with two letters followed by five digits, as indicated
below:
Two letters:
TC Test Case
PR Preamble
PO Postamble
CS Check State
UM Unexpected Message
DF Default
First digit:
1 test case with passive IUT behaviour
2 test case with active IUT behaviour;
3 test step preamble
4 test step postamble
5 test step miscellaneous
6 default
Second and third digit:
- state in which the body of test cases start;
- state in which the preamble finishes;
- state in which postamble, miscellaneous and default start;
- the value 99 represents the possibility of starting from different states (only for test
steps and defaults).
Fourth and fifth digit:
- continuous number.
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The group name is composed of six elements:
element 1: ISDN3 = Name of the test suite;
element 2: PS = Test case with passive IUT behaviour;
AC = Test case with active IUT behaviour;
PR = Preamble;
PO = Postamble;
MS = Miscellaneous;
DF = Default;
element 3: Uxx = same meaning as the second and third digits in the test name;
UAL = is identical to 99;
element 4: V = Valid;
I = Inopportune;
S = Syntactically Invalid;
element 5: two digits represent a timer (e.g. 02 = T302);
two letters represent a PDU (e.g. PG = Progress).
element 6: N = test purpose of the test case is described in NET 3;
O = the test has been created by the European CTS group.
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Annex A (normative): TTCN GR for basic access
This annex contains the TTCN GR for basic access.
A.1 Overview part
Test Suite Overview
Suite Name: ISDN3_BA
Standard Reference: ETS 300 102
PICS Proforma: I-ETS 300 314
PIXIT Proforma: I-ETS 300 318
PICS/PIXIT use:
Test Method(s): RS Remote single layer
Comments:
Test Test Case Pa ge Description
Case Reference
Ident.
TC10001 ISDN3/PS/U00/V 124 CALLED USER TESTS - STATE U0 - PASSIVE IUT BEHAVIOUR
/RC/N/TC10001 VALID TEST EVENTS
Ensure that on receipt of a RELEASE COMPLETE PDU, the
IUT does not respond and remains in the same state.
TC10002 ISDN3/PS/U00/V 124 CALLED USER TESTS - STATE U0 - PASSIVE IUT BEHAVIOUR
/RL/N/TC10002 VALID TEST EVENTS
Ensure that on receipt of a RELEASE PDU, the IUT
responds with a RELEASE COMPLETE PDU and remains in
the same state.
TC10003 ISDN3/PS/U00/V 124 CALLED USER TESTS - STATE U0 - PASSIVE IUT BEHAVIOUR
/ST/N/TC10003 VALID TEST EVENTS
Ensure that on receipt of a STATUS PDU indicating the
Null state N0, the IUT does not respond and remains
in the same state.
TC10004 ISDN3/PS/U00/V 125 CALLED USER TESTS - STATE U0 - PASSIVE IUT BEHAVIOUR
/ST/N/TC10004 VALID TEST EVENTS
Ensure that on receipt of a STATUS PDU indicating any
state except the Null state N0, the IUT responds with
either a RELEASE PDU or a RELEASE COMPLETE PDU with
cause value 101.
TC10005 ISDN3/PS/U00/V 125 INCOMING CALL HANDLING TESTS - STATE U0 - PASSIVE IUT
/SU/N/TC10005 BEHAVIOUR
VALID TEST EVENTS
Ensure that on receipt of a valid SETUP PDU without
the Sending complete information element, the IUT
responds with any of a SETUP ACKNOWLEDGE, CALL
PROCEEDING, ALERTING or CONNECT PDU and moves to the
relevant state Overlap Receiving U25, Incoming Call
Proceeding U9, Call Received U7 or Connect Request
U8.
TC10006 ISDN3/PS/U00/V 126 INCOMING CALL HANDLING TESTS - STATE U0 - PASSIVE IUT
/SU/N/TC10006 BEHAVIOUR
VALID TEST EVENTS
Ensure that on receipt of a valid SETUP PDU with the
Sending complete information element, the IUT
responds with any of a CALL PROCEEDING, ALERTING or
CONNECT PDU and moves to the relevant state Incoming
Call Proceeding U9, Call Received U7 or Connect
Request U8.
TC10007 ISDN3/PS/U00/V 126 INCOMING CALL HANDLING TESTS - STATE U0 - PASSIVE IUT
/SU/N/TC10007 BEHAVIOUR
VALID TEST EVENTS
Ensure that on receipt of a valid SETUP PDU
containing a Progress indicator information element
with progress description 1, the IUT modifies its
compatibility checking and accepts the call on the
basis of a compatible Bearer capability information
element.
TC10008 ISDN3/PS/U00/V 127 INCOMING CALL HANDLING TESTS - STATE U0 - PASSIVE IUT
/SU/N/TC10008 BEHAVIOUR
VALID TEST EVENTS
Ensure that on receipt of a valid SETUP PDU
containing an incompatible Bearer capability
information element (mandatory parameter) the IUT
reacts as follows:
- ignore the PDU or send a RELEASE COMPLETE PDU with
cause value 88 (broadcast data link);
- send a RELEASE COMPLETE PDU with cause value 88
(point-to-point data link).
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TC10009 ISDN3/PS/U00/V 127 INCOMING CALL HANDLING TESTS - STATE U0 - PASSIVE IUT
/SU/N/TC10009 BEHAVIOUR
VALID TEST EVENTS
Ensure that on receipt of a valid SETUP PDU
containing an incompatible High layer compatibility
information element (optional parameter), the IUT
reacts as follows:
- ignore the PDU or send a RELEASE COMPLETE PDU with
cause value 88 (broadcast data link);
- send a RELEASE COMPLETE PDU with cause value 88
(point-to-point data link).
TC10010 ISDN3/PS/U00/I 128 CALLED USER TESTS - STATE U0 - PASSIVE IUT BEHAVIOUR
/DI/N/TC10010 INOPPORTUNE TEST EVENTS
Ensure that on receipt of an inopportune PDU
(DISCONNECT), the IUT responds with a RELEASE PDU or
a RELEASE COMPLETE PDU with cause value 81.
TC10011 ISDN3/PS/U00/I 129 INCOMING CALL HANDLING TESTS - STATE U0 - PASSIVE IUT
/SU/N/TC10011 BEHAVIOUR
INOPPORTUNE TEST EVENTS
Ensure that on receipt of a repeated valid SETUP PDU
with the same call reference as the initial SETUP
PDU, the IUT does not respond to the second SETUP PDU
and remains in the same state.
TC10012 ISDN3/PS/U00/S 130 INCOMING CALL HANDLING TESTS - STATE U0 - PASSIVE IUT
/ER/O/TC10012 BEHAVIOUR
SYNTACTICALLY INVALID TEST EVENTS
Ensure that on receipt of a PDU with an erroneous
protocol discriminator, coded other than '08'H, the
IUT does not respond to the PDU and remains in the
same state.
TC10013 ISDN3/PS/U00/S 130 INCOMING CALL HANDLING TESTS - STATE U0 - PASSIVE IUT
/ER/N/TC10013 BEHAVIOUR
SYNTACTICALLY INVALID TEST EVENTS - ERROR CATEGORY 2
Ensure that the IUT ignores the receipt of a PDU
which is too short and remains in the same state.
TC10014 ISDN3/PS/U00/S 130 INCOMING CALL HANDLING TESTS - STATE U0 - PASSIVE IUT
/ER/N/TC10014 BEHAVIOUR
SYNTACTICALLY INVALID TEST EVENTS
Ensure that on receipt of a SETUP PDU with a call
reference flag bit set to 1, the IUT does not respond
and remains in the same state.
TC10015 ISDN3/PS/U00/S 131 INCOMING CALL HANDLING TESTS - STATE U0 - PASSIVE IUT
/ER/N/TC10015 BEHAVIOUR
SYNTACTICALLY INVALID TEST EVENTS - ERROR CATEGORY 13
Ensure that on receipt of a PDU with mandatory
information element missing, the IUT responds with a
RELEASE COMPLETE PDU with cause value 96 and remains
in the same state.
TC10016 ISDN3/PS/U00/S 131 CALLED USER TESTS - STATE U0 - PASSIVE IUT BEHAVIOUR
/ER/N/TC10016 SYNTACTICALLY INVALID TEST EVENTS
Ensure that the IUT responds to a syntactically
invalid message type with a RELEASE or RELEASE
COMPLETE PDU with cause value 81 and remains in the
same call state.
TC10018 ISDN3/PS/U00/S 132 NULL STATE TESTS - STATE U0 - PASSIVE IUT BEHAVIOUR
/ER/O/TC10018 SYNTACTICALLY INVALID TEST EVENTS - ERROR CATEGORY 3
Ensure that the IUT ignores the receipt of a PDU with
an invalid call reference format (octet 1, bits8-5
<> '0000'B) and remains in the same state.
TC10019 ISDN3/PS/U00/S 132 NULL STATE TESTS - STATE U0 - PASSIVE IUT BEHAVIOUR
/ER/O/TC10019 SYNTACTICALLY INVALID TEST EVENTS - ERROR CATEGORY 4
Ensure that the IUT ignores the receipt of a SETUP
PDU with an invalid call reference format (octet 1,
bits4-1, length value too high) and remains in the
same state.
TC10020 ISDN3/PS/U00/S 132 NULL STATE TESTS - STATE U0 - PASSIVE IUT BEHAVIOUR
/ER/O/TC10020 SYNTACTICALLY INVALID TEST EVENTS - ERROR CATEGORY 5
Ensure that the IUT ignores the receipt of a PDU with
the dummy call reference and remains in the same
state.
TC10021 ISDN3/PS/U00/S 133 NULL STATE TESTS - STATE U0 - PASSIVE IUT BEHAVIOUR
/ER/O/TC10021 SYNTACTICALLY INVALID TEST EVENTS - ERROR CATEGORY 6
Ensure that the IUT takes no action on any received
PDU except RESTART, RESTART ACKNOWLEDGE or STATUS,
with the global reference and returns a STATUS PDU.
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