SIST ETS 300 336:1998
(Main)Integrated Services Digital Network (ISDN); Signalling System No.7; Message Transfer Part (MTP); Test specification [ITU-T Recommendations Q.781 and Q.782 (1993), modified]
General Information
- Abstract
Definition of the tests of the MTP level 2 and 3 in order to support compatibility and validation procedures for node having implemented T/S 43-01
- Status
- Published
- Publication Date
- 30-Nov-1998
- Technical Committee
- SPS - Signalling protocols and switching
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-1998
- Due Date
- 01-Dec-1998
- Completion Date
- 01-Dec-1998
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Overview
SIST ETS 300 336:1998 is a Slovenian standard that specifies detailed testing procedures for the Message Transfer Part (MTP) of Signalling System No.7 (SS7) within an Integrated Services Digital Network (ISDN) environment. This standard aligns with ITU-T Recommendations Q.781 and Q.782, with modifications for European context and interoperability requirements. It defines comprehensive tests for MTP level 2 and level 3, supporting compatibility and validation procedures, especially for nodes implementing T/S 43-01.
As SS7 MTP is foundational for reliable and robust telecommunications signaling, the tests covered by SIST ETS 300 336:1998 ensure that network elements consistently handle message transfer, error correction, changeover, and network management functions.
Key Topics
MTP Protocol Testing
The standard details tests for MTP level 2 (data link layer) and level 3 (network layer), verifying conformance to protocol specifications.Compatibility and Validation
Emphasis is placed on procedures that support the validation and interoperability of network nodes across different vendors and implementations.Communication Reliability
Focus on testing alignment, error detection, processor outage handling, signal unit delimitation, and congestion control to assure robust network performance.Signalling Network Management
Procedures for testing route management, changeover, changeback, and the handling of unusual or invalid signaling messages are included to maintain continuous service.Modified References
The standard includes modifications to original ITU-T references (Q.701–Q.708), ensuring compliance with European telecommunication requirements.
Applications
Network Equipment Testing
Equipment manufacturers and network operators use this standard to verify that SS7 network elements-such as signalling transfer points and switches-work correctly under various operational scenarios.ISDN Service Assurance
The reliability of ISDN services depends on rigorous testing of the underlying SS7 MTP layers, making this test specification vital for quality assurance.Compatibility Validation
For operators integrating new nodes or updating systems, these tests help ensure newly implemented equipment can communicate reliably within the SS7 network architecture.Regulatory Compliance
Meeting national and international telecommunications standards is essential for market access and regulatory approval; this standard provides a recognized framework for SS7 MTP testing.
Related Standards
ETS 300 008-1
Specifies the protocol for the SS7 MTP, providing the foundational specifications that the tests in SIST ETS 300 336:1998 verify.ITU-T Q.701–Q.708
Core international recommendations elaborating the SS7 MTP protocol layers that underpin the European adaptations found in this standard.ITU-T Q.780, Q.781, Q.782
General test specification guidelines and test case descriptions for SS7, referenced and adapted within this document.T/S 43-01
Referenced as the targeted implementation requirement for which compatibility and validation are ensured.
Practical Value
By implementing the tests and procedures in SIST ETS 300 336:1998, organizations:
- Enhance the reliability and robustness of their SS7-based ISDN networks
- Ensure equipment interoperability and reduce integration risks
- Meet critical compliance benchmarks in European and international telecommunications sectors
- Gain assurance of proper network recovery, congestion handling, and message integrity, which are vital for modern digital communications
Keywords: ISDN, SS7, MTP, Signalling System No.7, telecommunications testing, protocol validation, compatibility, network management, error detection, European standard.
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Frequently Asked Questions
SIST ETS 300 336:1998 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Integrated Services Digital Network (ISDN); Signalling System No.7; Message Transfer Part (MTP); Test specification [ITU-T Recommendations Q.781 and Q.782 (1993), modified]". This standard covers: Definition of the tests of the MTP level 2 and 3 in order to support compatibility and validation procedures for node having implemented T/S 43-01
Definition of the tests of the MTP level 2 and 3 in order to support compatibility and validation procedures for node having implemented T/S 43-01
SIST ETS 300 336:1998 is classified under the following ICS (International Classification for Standards) categories: 33.080 - Integrated Services Digital Network (ISDN). The ICS classification helps identify the subject area and facilitates finding related standards.
SIST ETS 300 336:1998 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Integrated Services Digital Network (ISDN); Signalling System No.7; Message Transfer Part (MTP); Test specification [ITU-T Recommendations Q.781 and Q.782 (1993), modified]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:ETS 300 336 Edition 13SIST ETS 300 336:1998en01-IHEUXDU-19983SIST ETS 300 336:1998SLOVENSKI
STANDARD
EUROPEANETS 300 336TELECOMMUNICATIONSeptember 1996STANDARDSource: ETSI TC-SPSReference: T/S 43-17ICS:33.080Key words:ISDN, SS7, MTP, testingIntegrated Services Digital Network (ISDN);Signalling System No.7;Message Transfer Part (MTP);Test specification[ITU-T Recommendations Q.781 and Q.782 (1993), modified]ETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.frTel.: +33 92 94 42 00 - Fax: +33 93 65 47 16Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1996. All rights reserved.SIST ETS 300 336:1998
Page 2ETS 300 336: September 1996ForewordThis European Telecommunication Standard (ETS) has been produced by the Signalling Protocols andSwitching (SPS) Technical Committee of the European Telecommunications Standards Institute (ETSI).Transposition datesDate of adoption of this ETS:6 September 1996Date of latest announcement of this ETS (doa):31 December 1996Date of latest publication of new National Standardor endorsement of this ETS (dop/e):30 June 1997Date of withdrawal of any conflicting National Standard (dow):30 June 1997Endorsement noticeThe text of ITU-T Recommendations Q.781 (1993) and Q.782 (1993) was approved by ETSI as an ETSwith agreed modifications as given below.NOTE:New or modified text is indicated using sidebars. In addition, underlining and/or strike-out are used to highlight detailed modifications where necessary. For the tests, boldfont is used in addition to increase legibility.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.SIST ETS 300 336:1998
Page 3ETS 300 336: September 1996Global modifications to ITU-T Recommendations Q.781 and Q.782Insert the following two clauses (scope and normative references):ScopeThis European Telecommunication Standard (ETS) defines a set of detailed tests of the Signalling SystemNo.7 Message Transfer Part (MTP) level 2 and level 3 protocol. These tests intend to validate the protocolspecified in ETS 300 008-1 [1].This ETS conforms to ITU-T Recommendation Q.780 [2] which describes the basic rules of the testspecifications, however, it contains additional general principles specific to level 2 and level 3 tests,respectively.Normative referencesThis ETS incorporates by dated and undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this ETS only when incorporated in it by amendment or revision. For undated references the latestedition of the publication referred to applies.[1]ETS 300 008-1: "Integrated Services Digital Network (ISDN); Signalling SystemNo.7; Message Transfer Part (MTP) to support international interconnection;Part 1: Protocol specification [ITU-T Recommendations Q.701 (1993),Q.702 (1988), Q.703 to Q.706 (1993), Q.707 (1988) and Q.708 (1993),modified]".[2]ITU-T Recommendation Q.780 (1993): "Signalling System No.7 testspecification general description".Throughout the text of ITU-T Recommendations Q.781 and Q.782Replace references as shown below.Reference in ITU-TRecommendationsQ.781 and Q.782Modified referenceITU-T Recommendation Q.701ITU-T Recommendation Q.701 as modified by ETS 300 008-1 [1]ITU-T Recommendation Q.702ITU-T Recommendation Q.702 as modified by ETS 300 008-1 [1]ITU-T Recommendation Q.703ITU-T Recommendation Q.703 as modified by ETS 300 008-1 [1]ITU-T Recommendation Q.704ITU-T Recommendation Q.704 as modified by ETS 300 008-1 [1]ITU-T Recommendation Q.707ITU-T Recommendation Q.707 as modified by ETS 300 008-1 [1]SIST ETS 300 336:1998
Page 4ETS 300 336: September 1996Modifications to ITU-T Recommendation Q.781Test number 1.5Modify the test as follows:TEST NUMBER:
1.5PAGE:
1 OF 1REFERENCE:
Q.703 Clause 7
STD:
Fig. 8; Fig. 9TITLE:
Link State Control – Expected signal units/ordersSUB TITLE:
Normal alignment – correct procedure (FISU)PURPOSE:
To check normal alignment procedurePRE-TEST CONDITIONS:
Link out of serviceCONFIGURATION:
1TYPE
OF TEST:
VAT, CPTMESSAGE SEQUENCE:SPBSPALinkLink<-------------------------1 – 0:
SIOS1 – 0SIOS ------------------------->:
start<-------------------------1 – 0:
SIO1 – 0SIO -------------------------><-------------------------1 – 0:
SIN1 – 0SIN -------------------------><-------------------------1 – 0:
FISU1 – 0FISU ------------------------->TEST DESCRIPTION1.Start normal alignment procedure.2.Check link aligns and enters “In service” state.3.Check that “In service” state is maintained.4.In VAT only check it is possible to perform a normal alignment procedure in the following cases:–
use LSSU in point B with a status field of 8 bits;–
use LSSU in point B with a status field of 16 bits.SIST ETS 300 336:1998
Page 5ETS 300 336: September 1996Test number 1.7Modify the test as follows:TEST NUMBER:
1.7PAGE:
1 OF 1REFERENCE:
Q.703 Clauses 7, 10.3
STD:
Fig. 9; Fig. 17TITLE:
Link State Control – Expected signal units/ordersSUB TITLE:
SIO received during normal proving periodPURPOSE:
To test the response to the reception of an SIO during the normal proving periodPRE-TEST CONDITIONS:
Link out of serviceCONFIGURATION:
1TYPE
OF TEST:
VATEXPECTED SIGNAL UNIT SEQUENCE:SPBSPALinkLink<-------------------------1 – 0:
SIOS1 – 0SIOS ------------------------->:
start<-------------------------1 – 0:
SIO1 – 0SIO -------------------------><-------------------------1 – 0:
SIN1 – 0SIN ------------------------->
T4
Stopped1 – 0SIO (one only) ------------------------->1 – 0SIN -------------------------><-------------------------1 – 0
SIN
T4(Pn)<-------------------------1 – 0:
FISUTEST DESCRIPTION1.Send an SIO at B during normal proving period.2.Check that new normal period is entered.SIST ETS 300 336:1998
Page 6ETS 300 336: September 1996Test number 4.1Modify the test as follows:TEST NUMBER:
4.1PAGE:
1 OF 1REFERENCE:
Q.703 Clause 8
STD:
Fig. 10TITLE:
Processor outage controlSUB TITLE:
Set and clear LPO while link in servicePURPOSE:To check the ability to perform correctly when LPO is set and recoveredPRE-TEST CONDITIONS:
Link in serviceCONFIGURATION:
1TYPE
OF TEST:
VATEXPECTED SIGNAL UNIT SEQUENCE:SPBSPALinkLink<-------------------------1 – 0:FISU(FSN = 7F, BSN = 7F)1 – 0FISU
------------------------->(FSN = 7F, BSN = 7F)accepted<-------------------------1 – 0MSU (1)(FSN = 0, BSN = 7F)<-------------------------1 – 0MSU (2)(FSN = 1, BSN = 7F):
set LPO1 – 0MSU
------------------------->(FSN = 0, BSN = 0)<-------------------------1 – 0SIPO(FSN = 1 0, BSN = 7F)1 – 0FISU
------------------------->(FSN == 0, BSN == 0):
clear LPO<-------------------------1 – 0MSU (3)(FSN = 1, BSN = 5)TEST DESCRIPTION1.Set LPO at A while link in service.2.Check that MSU from B is discarded.3.Clear LPO at A after at least 1,2 s.4.Check that “old” messages are flushed from level 2 buffers and not transmitted on the link. Check that new MSUs aresent correctly.SIST ETS 300 336:1998
Page 7ETS 300 336: September 1996Test number 5.3Modify the test as follows:TEST NUMBER:
5.3PAGE:
1 OF 1REFERENCE:
Q.703 subclause 4.1
STD:
Fig. 11TITLE:
SU delimitation, alignment, error detection and correctionSUB TITLE:
Below minimum signal unit lengthPURPOSE:To test the signal unit delimitation, alignment and error detection action on receipt of signal unit less than theminimum lengthPRE-TEST CONDITIONS:
Link in serviceCONFIGURATION:
1TYPE
OF TEST:
VATEXPECTED SIGNAL UNIT SEQUENCE:SPBSPALinkLink<-------------------------1 – 0:
FISU:
(BIB + BSN = FF)1 – 0FISU ------------------------->1 – 0corrupt MSU
------------------------->(FIB + FSN = 80)(signal unit lessthan 6 octets)<-------------------------1 – 0:
FISU:
(BSN unchanged)1 – 0FISU ------------------------->TEST DESCRIPTION1.Generate a corrupt MSU at B of less than 6 octet (i.e. less than 5 octets between flags).2.Check A discards the signal unit, and may go goes into octet counting mode.3.On reception of a correct FISU, check that A leaves the octet counting mode if it was entered and remains in the “inservice” state.SIST ETS 300 336:1998
Page 8ETS 300 336: September 1996Test number 9.7Modify the test as follows:TEST NUMBER:
9.7PAGE:
1 OF 1REFERENCE:
Q.703 subclause 6.2
STD:
Fig. 15TITLE:
Transmission and reception control (PCR)SUB TITLE:
MSU transmission while RPO setPURPOSE:To ensure correct performance while RPO is setPRE-TEST CONDITIONS:
Link in serviceCONFIGURATION:
1TYPE
OF TEST:
VATEXPECTED SIGNAL UNIT SEQUENCE:SPBSPALinkLink<-------------------------1 – 0FISU(FSN = 7F, BSN = 7F)1 – 0FISU(FSN = 7F, BSN = 7F) ------------------------->Iooooo<-------------------------1 – 0MSU(FSN = 0, BSN = 7F): set LPO(I:(I:1 – 0SIPO(FSN = 7F, BSN = 7F) ------------------------->Iooooo<-------------------------1 – 0FISU(FSN = 0, BSN = 7F): clear LPO(I:(I:1 – 0MSU(FSN = 0, BSN = 7F) ------------------------->Iooooo<-------------------------1 – 0FISU(FSN = 7F 0, BSN = 0)1 – 0MSU(FSN = 0, BSN = 7F) ------------------------->Iooooo<-------------------------1 – 0FISU(FSN = 7F 0, BSN = 0)TEST DESCRIPTION1.Generate an MSU at A.2.Instead of sending positive acknowledgement, set and keep PO at B for at least 1,2 s.3.Check A stops a retransmission of the MSU and sends FISUs, and does not detect link failure by the expiration of T7.4.Cease PO after at least 1,2 s and send an MSU with no positive acknowledgement at B.5.Check A flushed its buffer and no old MSU is sent.6.Generate an MSU at B.7.Check A receives the MSU and responds correctly.SIST ETS 300 336:1998
Page 9ETS 300 336: September 1996Modifications to ITU-T Recommendation Q.782Test number 2.3Modify the test as follows:TEST
NUMBER:
2.3PAGE:
1 of 1REFERENCE:
Q.704 subclause 2.4
Fig. 24, Fig. 25TITLE:
Signalling message handlingSUBTITLE:
Message received with an erroneous SI (distribution function)PURPOSE:
To check the response to a message received with an erroneous SIPRE-TEST
CONDITIONS:
Signalling linkset activatedCONFIGURATION:
ATYPE
OF
TEST:
VATTYPE
OF
SP:
ALLMESSAGE
SEQUENCE:SP
ASP
BLinkLink<-------------------------
1 – 1:Invalid SLTM:(erroneous invalid SI)TEST
DESCRIPTION1.Send an SLTM message with an invalid SI.2.Check that no response is received except perhaps a UPU (cause unequipped) when the SI used does not exist.SIST ETS 300 336:1998
Page 10ETS 300 336: September 1996Test number 3.21Modify the test as follows:TEST
NUMBER:
3.21PAGE:
1 of 1REFERENCE:
Q.704 clause 5
Fig. 28, Fig. 29, Fig. 30TITLE:
ChangeoverSUBTITLE:
Reception of a changeover order on an available linkPURPOSE:
To check the changeover procedure on reception of a COO or ECO for a link in servicePRE-TEST
CONDITIONS:
Linkset with two available linksCONFIGURATION:
ATYPE
OF
TEST:
VATTYPE
OF
SP:
ALLMESSAGE
SEQUENCE:SP
ASP
BLinkLink:Start traffic1 – 1TRAFFIC----------------------------------------------><----------------------------------------------1 – 1
TRAFFIC1 – 2TRAFFIC----------------------------------------------><----------------------------------------------1 – 2
TRAFFIC<----------------------------------------------1 – 2
COO, SLC
1 – 11 – 2
(FSN corresponding to1 – 2
the last received message)1 – 2COA, SLC
1 – 1---------------------------------------------->1 – 2TRAFFIC(from 1 – 1)----------------------------------------------><----------------------------------------------1 – 2
TRAFFIC (from 1 – 1):Wait:Stop trafficTEST
DESCRIPTION1.Start traffic to B and C on all the links.2.Send a COO from B to A for 1 – 1 on link 1 – 2 and check that the COA is received.3.Check that the link 1 – 1 becomes unavailable.4.Sto
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Integrated Services Digital Network (ISDN); Signalling System No.7; Message Transfer
Part (MTP); Test specification [ITU-T Recommendations Q.781 and Q.782 (1993),
modified]
Ta slovenski standard je istoveten z: ETS 300 336 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN ETS 300 336
TELECOMMUNICATION September 1996
STANDARD
Source: ETSI TC-SPS Reference: T/S 43-17
ICS: 33.080
Key words: ISDN, SS7, MTP, testing
Integrated Services Digital Network (ISDN);
Signalling System No.7;
Message Transfer Part (MTP);
Test specification
[ITU-T Recommendations Q.781 and Q.782 (1993), modified]
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: secretariat@etsi.fr
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 1996. All rights reserved.
Page 2
ETS 300 336: September 1996
Foreword
This European Telecommunication Standard (ETS) has been produced by the Signalling Protocols and
Switching (SPS) Technical Committee of the European Telecommunications Standards Institute (ETSI).
Transposition dates
Date of adoption of this ETS: 6 September 1996
Date of latest announcement of this ETS (doa): 31 December 1996
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 June 1997
Date of withdrawal of any conflicting National Standard (dow): 30 June 1997
Endorsement notice
The text of ITU-T Recommendations Q.781 (1993) and Q.782 (1993) was approved by ETSI as an ETS
with agreed modifications as given below.
NOTE: New or modified text is indicated using sidebars. In addition, underlining and/or strike-
out are used to highlight detailed modifications where necessary. For the tests, bold
font is used in addition to increase legibility.
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.
Page 3
ETS 300 336: September 1996
Global modifications to ITU-T Recommendations Q.781 and Q.782
Insert the following two clauses (scope and normative references):
Scope
This European Telecommunication Standard (ETS) defines a set of detailed tests of the Signalling System
No.7 Message Transfer Part (MTP) level 2 and level 3 protocol. These tests intend to validate the protocol
specified in ETS 300 008-1 [1].
This ETS conforms to ITU-T Recommendation Q.780 [2] which describes the basic rules of the test
specifications, however, it contains additional general principles specific to level 2 and level 3 tests,
respectively.
Normative references
This ETS incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] ETS 300 008-1: "Integrated Services Digital Network (ISDN); Signalling System
No.7; Message Transfer Part (MTP) to support international interconnection;
Part 1: Protocol specification [ITU-T Recommendations Q.701 (1993),
Q.702 (1988), Q.703 to Q.706 (1993), Q.707 (1988) and Q.708 (1993),
modified]".
[2] ITU-T Recommendation Q.780 (1993): "Signalling System No.7 test
specification general description".
Throughout the text of ITU-T Recommendations Q.781 and Q.782
Replace references as shown below.
Reference in ITU-T
Recommendations Modified reference
Q.781 and Q.782
ITU-T Recommendation Q.701 ITU-T Recommendation Q.701 as modified by ETS 300 008-1 [1]
ITU-T Recommendation Q.702 ITU-T Recommendation Q.702 as modified by ETS 300 008-1 [1]
ITU-T Recommendation Q.703 ITU-T Recommendation Q.703 as modified by ETS 300 008-1 [1]
ITU-T Recommendation Q.704 ITU-T Recommendation Q.704 as modified by ETS 300 008-1 [1]
ITU-T Recommendation Q.707 ITU-T Recommendation Q.707 as modified by ETS 300 008-1 [1]
Page 4
ETS 300 336: September 1996
Modifications to ITU-T Recommendation Q.781
Test number 1.5
Modify the test as follows:
TEST NUMBER: 1.5 PAGE: 1 OF 1
REFERENCE: Q.703 Clause 7 STD: Fig. 8; Fig. 9
TITLE: Link State Control – Expected signal units/orders
SUB TITLE: Normal alignment – correct procedure (FISU)
PURPOSE: To check normal alignment procedure
PRE-TEST CONDITIONS: Link out of service
CONFIGURATION: 1 TYPE OF TEST: VAT, CPT
MESSAGE SEQUENCE:
SP B SP A
Link Link
<------------------------- 1 – 0 : SIOS
1 – 0 SIOS ------------------------->
: start
<------------------------- 1 – 0 : SIO
1 – 0 SIO ------------------------->
<------------------------- 1 – 0 : SIN
1 – 0 SIN ------------------------->
<------------------------- 1 – 0 : FISU
1 – 0 FISU ------------------------->
TEST DESCRIPTION
1. Start normal alignment procedure.
2. Check link aligns and enters “In service” state.
3. Check that “In service” state is maintained.
4. In VAT only check it is possible to perform a normal alignment procedure in the following cases:
– use LSSU in point B with a status field of 8 bits;
– use LSSU in point B with a status field of 16 bits.
Page 5
ETS 300 336: September 1996
Test number 1.7
Modify the test as follows:
TEST NUMBER: 1.7 PAGE: 1 OF 1
REFERENCE: Q.703 Clauses 7, 10.3 STD: Fig. 9; Fig. 17
TITLE: Link State Control – Expected signal units/orders
SUB TITLE: SIO received during normal proving period
PURPOSE: To test the response to the reception of an SIO during the normal proving period
PRE-TEST CONDITIONS: Link out of service
CONFIGURATION: 1 TYPE OF TEST: VAT
EXPECTED SIGNAL UNIT SEQUENCE:
SP B SP A
Link Link
<------------------------- 1 – 0 : SIOS
1 – 0 SIOS ------------------------->
: start
<------------------------- 1 – 0 : SIO
1 – 0 SIO ------------------------->
<------------------------- 1 – 0 : SIN
1 – 0 SIN ------------------------->
T4
Stopped
1 – 0 SIO (one only) ------------------------->
1 – 0 SIN ------------------------->
SIN
<------------------------- 1 – 0
T4(Pn)
<------------------------- 1 – 0 : FISU
TEST DESCRIPTION
1. Send an SIO at B during normal proving period.
2. Check that new normal period is entered.
Page 6
ETS 300 336: September 1996
Test number 4.1
Modify the test as follows:
TEST NUMBER: 4.1 PAGE: 1 OF 1
REFERENCE: Q.703 Clause 8 STD: Fig. 10
TITLE: Processor outage control
SUB TITLE: Set and clear LPO while link in service
PURPOSE: To check the ability to perform correctly when LPO is set and recovered
PRE-TEST CONDITIONS: Link in service
CONFIGURATION: 1 TYPE OF TEST: VAT
EXPECTED SIGNAL UNIT SEQUENCE:
SP B SP A
Link Link
<------------------------- 1 – 0 :FISU
(FSN = 7F, BSN = 7F)
1 – 0 FISU ------------------------->
(FSN = 7F, BSN = 7F)
accepted
<------------------------- 1 – 0 MSU (1)
(FSN = 0, BSN = 7F)
<------------------------- 1 – 0 MSU (2)
(FSN = 1, BSN = 7F)
: set LPO
1 – 0 MSU ------------------------->
(FSN = 0, BSN = 0)
<------------------------- 1 – 0 SIPO
(FSN = 1 0, BSN = 7F)
1 – 0 FISU ------------------------->
(FSN == 0, BSN == 0)
: clear LPO
<------------------------- 1 – 0 MSU (3)
(FSN = 1, BSN = 5)
TEST DESCRIPTION
1. Set LPO at A while link in service.
2. Check that MSU from B is discarded.
3. Clear LPO at A after at least 1,2 s.
4. Check that “old” messages are flushed from level 2 buffers and not transmitted on the link. Check that new MSUs are
sent correctly.
Page 7
ETS 300 336: September 1996
Test number 5.3
Modify the test as follows:
TEST NUMBER: 5.3 PAGE: 1 OF 1
REFERENCE: Q.703 subclause 4.1 STD: Fig. 11
TITLE: SU delimitation, alignment, error detection and correction
SUB TITLE: Below minimum signal unit length
PURPOSE: To test the signal unit delimitation, alignment and error detection action on receipt of signal unit less than the
minimum length
PRE-TEST CONDITIONS: Link in service
CONFIGURATION: 1 TYPE OF TEST: VAT
EXPECTED SIGNAL UNIT SEQUENCE:
SP B SP A
Link Link
<------------------------- 1 – 0 : FISU
: (BIB + BSN = FF)
------------------------->
1 – 0 FISU
1 – 0 corrupt MSU ------------------------->
(FIB + FSN = 80)
(signal unit less
than 6 octets)
<------------------------- 1 – 0 : FISU
: (BSN unchanged)
1 – 0 FISU ------------------------->
TEST DESCRIPTION
1. Generate a corrupt MSU at B of less than 6 octet (i.e. less than 5 octets between flags).
2. Check A discards the signal unit, and may go goes into octet counting mode.
3. On reception of a correct FISU, check that A leaves the octet counting mode if it was entered and remains in the “in
service” state.
Page 8
ETS 300 336: September 1996
Test number 9.7
Modify the test as follows:
TEST NUMBER: 9.7 PAGE: 1 OF 1
REFERENCE: Q.703 subclause 6.2 STD: Fig. 15
TITLE: Transmission and reception control (PCR)
SUB TITLE: MSU transmission while RPO set
PURPOSE: To ensure correct performance while RPO is set
PRE-TEST CONDITIONS: Link in service
CONFIGURATION: 1 TYPE OF TEST: VAT
EXPECTED SIGNAL UNIT SEQUENCE:
SP B SP A
Link Link
<------------------------- 1 – 0 FISU
(FSN = 7F, BSN = 7F)
1 – 0 FISU ------------------------->Iooooo
(FSN = 7F, BSN = 7F)
<------------------------- 1 – 0 MSU
(FSN = 0, BSN = 7F)
: set LPO (I:
(I:
1 – 0 SIPO ------------------------->Iooooo
(FSN = 7F, BSN = 7F)
<------------------------- 1 – 0 FISU
(FSN = 0, BSN = 7F)
: clear LPO (I:
(I:
1 – 0 MSU ------------------------->Iooooo
(FSN = 0, BSN = 7F)
<------------------------- 1 – 0 FISU
(FSN = 7F 0, BSN = 0)
1 – 0 MSU ------------------------->Iooooo
(FSN = 0, BSN = 7F)
<------------------------- 1 – 0 FISU
(FSN = 7F 0, BSN = 0)
TEST DESCRIPTION
1. Generate an MSU at A.
2. Instead of sending positive acknowledgement, set and keep PO at B for at least 1,2 s.
3. Check A stops a retransmission of the MSU and sends FISUs, and does not detect link failure by the expiration of T7.
4. Cease PO after at least 1,2 s and send an MSU with no positive acknowledgement at B.
5. Check A flushed its buffer and no old MSU is sent.
6. Generate an MSU at B.
7. Check A receives the MSU and responds correctly.
Page 9
ETS 300 336: September 1996
Modifications to ITU-T Recommendation Q.782
Test number 2.3
Modify the test as follows:
TEST NUMBER: 2.3 PAGE: 1 of 1
REFERENCE: Q.704 subclause 2.4 Fig. 24, Fig. 25
TITLE: Signalling message handling
SUBTITLE: Message received with an erroneous SI (distribution function)
PURPOSE: To check the response to a message received with an erroneous SI
PRE-TEST CONDITIONS: Signalling linkset activated
CONFIGURATION: A TYPE OF TEST: VAT TYPE OF SP: ALL
MESSAGE SEQUENCE:
SP A SP B
Link Link
<------------------------- 1 – 1 :Invalid SLTM
:(erroneous invalid SI)
TEST DESCRIPTION
1. Send an SLTM message with an invalid SI.
2. Check that no response is received except perhaps a UPU (cause unequipped) when the SI used does not exist.
Page 10
ETS 300 336: September 1996
Test number 3.21
Modify the test as follows:
TEST NUMBER: 3.21 PAGE: 1 of 1
REFERENCE: Q.704 clause 5 Fig. 28, Fig. 29, Fig. 30
TITLE: Changeover
SUBTITLE: Reception of a changeover order on an available link
PURPOSE: To check the changeover procedure on reception of a COO or ECO for a link in service
PRE-TEST CONDITIONS: Linkset with two available links
CONFIGURATION: A TYPE OF TEST: VAT TYPE OF SP: ALL
MESSAGE SEQUENCE:
SP A SP B
Link Link
:Start traffic
1 – 1 TRAFFIC ---------------------------------------------->
<---------------------------------------------- 1 – 1 TRAFFIC
1 – 2 TRAFFIC ---------------------------------------------->
<---------------------------------------------- 1 – 2 TRAFFIC
<---------------------------------------------- 1 – 2 COO, SLC 1 – 1
1 – 2 (FSN corresponding to
1 – 2 the last received message)
1 – 2 COA, SLC 1 – 1 ---------------------------------------------->
1 – 2 TRAFFIC ---------------------------------------------->
(from 1 – 1)
<---------------------------------------------- 1 – 2 TRAFFIC (from 1 – 1)
:Wait
:Stop traffic
TEST DESCRIPTION
1. Start traffic to B and C on all the links.
2. Send a COO from B to A for 1 – 1 on link 1 – 2 and check tha
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