1、 ATIS-0300015 Next Generation Interconnection Interoperability (NGIIF) Reference Document Part III, Installation, Testing and Maintenance Responsibilities for SS7 Links and Trunks Attachment D Test Severity Analysis Criteria Version 12.0 ATIS is the leading technical planning and standards developme
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6、onsored Next Generation Interconnection Interoperability Forum (NGIIF). The NGIIF addresses next-generation network interconnection and interoperability issues associated with emerging technologies. Specifically, it develops operational procedures which involve the network aspects of architecture, d
7、isaster preparedness, installation, maintenance, management, reliability, routing, security, and testing between network operators. In addition, the NGIIF addresses issues which impact the interconnection of existing and next generation networks and facilitate the transition to emerging technologies
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13、enance Responsibilities for SS7 Links and Trunks, Attachment D, Test Severity Analysis Criteria, Formerly NIIF 5018 The NGIIF Reference Document, Part III, Installation and Maintenance Responsibilities for SS7 Links and Trunks, Attachment D, Test Severity Analysis Criteria, is an ATIS standard devel
14、oped by the NGIIF. Published by Alliance for Telecommunications Industry Solutions 1200 G Street, NW, Suite 500 Washington, DC 20005 Copyright 2011 by Alliance for Telecommunications Industry Solutions All rights reserved. 2 No part of this publication may be reproduced in any form, in an electronic
15、 retrieval system or otherwise, without the prior written permission of the publisher. For information contact ATIS at 202.628.6380. ATIS is online at . Printed in the United States of America. 3 Test Severity Analysis Criteria Table of Contents 1 SEVERITY LEVELS 4 2 REASONS 4 3 LEVEL 2 SS7 LINK TES
16、T . 4 4 LEVEL 2 SS7 LINK TEST . 5 5 LEVEL 3 SS7 LINK TEST . 6 6 ISUP TESTS . 7 7 SCCP MANAGEMENT MESSAGES ACROSS SS7 NETWORKS 8 4 1 Severity Levels 1. Very low probability of causing Network Harm. 2. Low probability of causing Network Harm. 3. May cause Network harm if tests run for a long time or a
17、re improperly performed. 4. Will cause Network harm if tests run for a long time or are improperly performed. 5. Too risky to be performed during normal Traffic periods. 6. Not recommended to be done where it affects Live network traffic. 2 Reasons Tests are only performed over test trunks that are
18、not yet carrying live traffic. There should be minimal or no affect on other trunks or the switch itself. Only affects one Link. Tests are only performed over test trunks that are not carrying live Traffic. Other trunks and the switch itself may be affected. Affects two or more Links. Test Scripts m
19、essages may cause problems if they are left on for a long time. Test Scripts messages could enter the network. Test Scripts messages will not go over the network. May be disruptive to live signaling. High probability of being disruptive to live signaling. Will be disruptive to live signaling. 3 Leve
20、l 2 SS7 Link Test The tests listed are referenced in Part III, Attachment A. TEST DESCRIPTION NGIIF TEST # SEVERITY REASON TYPE LEVEL Timer T2 1.1 1 B & G I* Timer T3 1.2 1 B & G I* Timer T1 & T4 1.3 1 B & G I* Timer T1 & Emergency 1.4 1 B & G I* 5 Deactivation during Initial Alignment 1.5 1 B & G I
21、* Deactivation during Alignment 1.6 1 B & G I* SIO received during Link In-Service 1.7 1 B & G I* SIOs received during In-Service State 1.8 1 B & G I* Deactivation during the Proving Period 1.9 1 B & G I* Break Transmission Path 1.10 1 B & G I* Corrupt FIBs 1.11 1 B, E & G I* Flag Insertion within O
22、CTET Boundaries 1.12 1 B, E & G I* Signal Unit Error Rate Monitor 1.13 1 B & G I* Signal Unit Error Rate Monitor 1.14 1 B & G I* Consecutive Corrupt Signaling Units 1.15 1 B & G I* I* = INTRUSIVE TESTS The interconnecting circuit shall be interrupted, with the testing unit inserted into the circuit
23、and acting as an emulator to the signaling point under test. NI* = NON-INTRUSIVE TESTS The test shall be able to observe traffic traversing the link(s) between the two (2) signaling points in a monitor mode. 4 Level 2 SS7 Link Test The tests listed are referenced in Part III, Attachment A. TEST DESC
24、RIPTION NGIIF TEST # SEVERITY REASON TYPE LEVEL Alignment Error Rate Monitor 1.16 1 B & G I* Alignment Error Rate Monitor 1.17 1 B & G I* Negative Acknowledgement 1.18 1 B & G I* Retransmission Buffer Full 1.19 1 B & G I* Erroneous FIB 1.20 1 B, E & G I* Erroneous Retransmission of Multiple FISUs 1.
25、21 1 B, E & G I* Abnormal Backward Sequence Number 1.22 1 B & G I* Abnormal Backward Sequence Number 1.23 1 B & G I* Delay of Acknowledgement 1.24 1 B & G I* Normal Align 1.38 1 B & G NI* 6 Broken Transmission Path 1.39 1 B & G NI* MSU Transmission and Reception 1.40 2 B & F NI* I* = INTRUSIVE TESTS
26、 The interconnecting circuit shall be interrupted, with the testing unit inserted into the circuit and acting as an emulator to the signaling point under test. NI* = NON-INTRUSIVE TESTS The test shall be able to observe traffic traversing the link(s) between the two (2) signaling points in a monitor
27、 mode. 5 Level 3 SS7 Link Test The tests listed are referenced in Part III, Attachment A. TEST DESCRIPTION NGIIF TEST # SEVERITY REASON TYPE LEVEL Link Activation - Multi Links 1.25 1 D & G I Discrimination of Invalid Point Code 1.26 1 D & G I Load Distribution 1.27 1 D & G NI Load Sharing between L
28、ink Sets/between Two (2) Link Sets 1.28 1 D & G NI Changeover initiated at one side of a Link Set 1.29 3 D & G NI Changeover to alternate Link Set 1.30 3 D, G & I NI Change-Back within a Link Set 1.31 3 D, G & I NI Change-Back from another Link Set 1.32 2 D, G & I NI Inhibit Available Link 1.33 2 C,
29、 G & I NI Inhibit Unavailable Link 1.34 2 C, G & I NI Inhibit Denied 1.35 5 D, G & H NI Management Un-Inhibit with Change-Back 1.42 2 D, G & I NI Manual Un-Inhibition of a Link without Change-Back 1.43 1 D & G NI Link Forced Un-Inhibit 1.44 5 D & G NI Management Inhibiting Test 1.37 3 D & G NI Signa
30、ling Route Management Tests 1.45 1.46 5 5 D, F & H D, F & H I I 7 1.47 1.48 1.49 5 5 4 D, F & H D, F & H D, F & H I I I I* = INTRUSIVE TESTS The interconnecting circuit shall be interrupted, with the testing unit inserted into the circuit and acting as an emulator to the signaling point under test.
31、NI* = NON-INTRUSIVE TESTS The test shall be able to observe traffic traversing the link(s) between the two (2) signaling points in a monitor mode. 6 ISUP Tests The tests listed are referenced in Part III, Attachment B. TEST DESCRIPTION NGIIF TEST # SEVERITY REASON TYPE LEVEL Circuit Validation Test
32、(CVT) EO-IC (Org) * (CVT) AT-IC (Org) * (CVT) IC-EO (Term)* (CVT) IC-AT (Term)* 2.1 1 A NI Continuity Check Request (CCR) EO-IC (Org) * (CCR) AT-IC (Org) * (CCR) IC-EO (Term) * (CCR) IC-AT (Term) * (CCR) EO-AT-IC (Org) * 2.2 1 A NI Continuity Test Successful * 2.3 1 A NIEO-IC (Org) Continuity Test U
33、nsuccessful EO-AT-IC (Org) * 2.4 1 A NI Continuity Test - Previous Circuit 2.5 1 A NI Continuity Test Successful - CRM 2.6 1 A NI Continuity Unsuccessful - CRM 2.7 1 A NI Single Circuit Block/Unblock 2.8 1 A NI BLO/UBL Single Circuit Block/Reset Circuit/ Unblock - BLO/RSC/UBL 2.9 3 C NI I* = INTRUSI
34、VE TESTS The interconnecting circuit shall be interrupted, with the testing unit inserted into the circuit and acting as an emulator to the signaling point under test. 8 NI* = NON-INTRUSIVE TESTS The test shall be able to observe traffic traversing the link(s) between the two (2) signaling points in
35、 a monitor mode. 7 SCCP Management Messages Across SS7 Networks The tests listed are referenced in Part III, Attachment C. TEST DESCRIPTION NGIIF TEST # SEVERITY REASON TYPE LEVEL Successful UDT Queries/Responses - FGTT 3.1 2 F Failure - Unassigned Codes 3.2 1 G Failure - Invalid Address Indicator i
36、n Called Party 3.3 1 G Failure - GTT (TT & GT Digits) 3.4 1 G Failure - (no entries for GT) 3.5 1 G Failure - MTP Network Routing at an STP with GTT Functions 3.6 1 G Failure - of the Signaling End Point 3.7 6 J Failure - of the Signaling End Point 3.8 Successful UDT Queries/Responses - FGTT in the Originating Network 3.9 2 F SSP/SST and SSA - FGTT in Originating Network 3.10 6 J SST/SSA - FGTT in Originating Network 3.11 2 F
