ATIS 0300012-2011 Next Generation Interconnection Interoperability (NGIIF) Reference Document Part III Installation Testing and Maintenance Responsibilities for SS7 Links and Trunk.pdf

1、 ATIS-0300012 Next Generation Interconnection Interoperability (NGIIF) Reference Document Part III, Installation, Testing and Maintenance Responsibilities for SS7 Links and Trunks Attachment A MTP Compatibility Tests Version 12.0 ATIS is the leading technical planning and standards development organ

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6、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, disaster

7、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 All cha

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13、esponsibilities for SS7 Links and Trunks, Attachment A, MTP Compatibility Tests, Formerly NIIF 5007 The NGIIF Reference Document, Part III, Installation and Maintenance Responsibilities for SS7 Links and Trunks is an ATIS standard developed by the NGIIF. Published by Alliance for Telecommunications

14、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 retrieval system or otherwise, without the prior written permis

15、sion of the publisher. For information contact ATIS at 202.628.6380. ATIS is online at . Printed in the United States of America. 3 INSTALLATION, TESTING AND MAINTENANCE RESPONSIBILITIES FOR SS7 LINKS AND TRUNKS, ATTACHMENT A - MTP COMPATIBILITY TESTS Table of Contents 1 GENERAL TESTS 5 1.1 MTP LEVE

16、LS 2 AND 3 COMPATIBILITY TESTING 5 1.2 INITIAL SS7 INTERCONNECTION . 5 1.3 TESTING ENVIRONMENT . 5 1.4 OTHER TESTING CONSIDERATIONS . 5 2 TEST SCRIPTS . 6 2.1 TIMER T2 6 2.2 TIMER T3 7 2.3 TIMERS T1 AND T4 . 8 2.4 TIMER T4 EMERGENCY . 9 2.5 DEACTIVATION DURING INITIAL ALIGNMENT 10 2.6 DEACTIVATION D

17、URING ALIGNMENT . 11 2.7 SIO RECEIVED DURING LINK IN-SERVICE 12 2.8 SIOS RECEIVED DURING IN-SERVICE STATE . 13 2.9 DEACTIVATION DURING THE PROVING PERIOD 14 2.10 BREAK TRANSMISSION PATH - LINK ALIGNED AND READY . 15 2.11 CORRUPT FIBS . 16 2.12 FLAG INSERTION WITHIN OCTET BOUNDARIES 17 2.13 SIGNAL UN

18、IT ERROR RATE MONITOR 18 2.14 SIGNAL UNIT ERROR RATE MONITOR 19 2.15 CONSECUTIVE CORRUPT SIGNAL UNITS . 20 2.16 ALIGNMENT ERROR RATE MONITOR 21 2.17 ALIGNMENT ERROR RATE MONITOR 23 2.18 NEGATIVE ACKNOWLEDGMENT . 25 2.19 RETRANSMISSION BUFFER FULL . 26 2.20 ERRONEOUS FIB . 29 2.21 ERRONEOUS RETRANSMI

19、SSION -MULTIPLE FISU . 30 2.22 ABNORMAL BACKWARD SEQUENCE NUMBER 31 2.23 ABNORMAL BACKWARD SEQUENCE NUMBER 32 2.24 DELAY OF ACKNOWLEDGMENT 33 2.25 LINK ACTIVATION - MULTIPLE LINKS 34 2.26 DISCRIMINATION OF INVALID POINT CODE 36 2.27 LOAD DISTRIBUTION 37 2.28 LOAD SHARING BETWEEN LINK-SETS - BETWEEN

20、TWO LINK-SETS . 38 2.29 CHANGEOVER INITIATED AT ONE SIDE OF A LINK-SET 39 2.30 CHANGEOVER TO AN ALTERNATE LINKSET . 40 2.31 CHANGEBACK WITHIN A LINK-SET 41 2.32 CHANGEBACK FROM ANOTHER LINK-SET . 42 2.33 INHIBIT AVAILABLE LINK . 43 2.34 INHIBIT AVAILABLE LINK . 44 2.35 INHIBIT UNAVAILABLE LINK 45 2.

21、36 LINK FORCED UNINHIBIT 46 2.37 MANAGEMENT INHIBITING TEST - NORMAL PROCEDURE . 47 2.38 NORMAL ALIGNMENT . 48 2.39 BROKEN TRANSMISSION PATH TRANSMISSION PATH” . 49 2.40 MSU GENERATION . 50 2.41 MANAGEMENT UNINHIBIT WITH CHANGEBACK . 51 2.42 MANUAL UNINHIBITION OF A LINK - WITHOUT CHANGEBACK . 52 2.

22、43 SIGNALING ROUTE MANAGEMENT TESTS (ISSUE 11, PAGE 19 & 20) . 53 2.44 SIGNALING ROUTE MANAGEMENT TESTS . 54 2.45 SIGNALING ROUTE MANAGEMENT TESTS . 55 4 2.46 SIGNALING ROUTE MANAGEMENT TESTS . 56 2.47 SIGNALING ROUTE MANAGEMENT TESTS . 57 2.48 PROCESSOR OUTAGE 59 2.49 LEVEL 2 FLOW CONTROL . 61 2.50

23、 HUBBING INTERCONNECTION TEST 64 3 ATTACHMENT A MTP COMPATIBILITY TESTS, TEST DIAGRAMS . 65 4 ANNEX REFERENCES . 67 5 1 General Tests The following tests are recommended by the Next Generation Interconnection Interoperability Forum (NGIIF) to verify the compatibility of two networks during interconn

24、ection. These tests are intended to be used as a recommended set of minimum tests of levels two and three of the SS7 protocol. It is assumed that the two interconnecting networks may have some additional tests they may wish to perform during interconnection. In that case, these tests should be part

25、of the bilateral agreements developed for SS7 network interconnection. 1.1 MTP Levels 2 and 3 Compatibility Testing Compatibility testing checks for the correct interworking of two SS7 implementations. The tests are written for the interconnecting of two given implementations. These tests will be pe

26、rformed not only on new signaling points but may also be performed between already-connected signaling points. 1.2 Initial SS7 Interconnection The full test suite should be run between the two interconnecting companies for any interconnection configuration that was not previously tested. The configu

27、ration is defined by both manufacturer model and software load of the interconnecting signaling network elements. Subsequent interconnections, using configurations previously tested by the two interconnecting companies, may be tested at their discretion. 1.3 Testing Environment The tests in this doc

28、ument are Intrusive and Non-Intrusive Tests. These terms are defined as follows: Intrusive - The interconnecting circuit shall be interrupted and the testing unit inserted into the circuit to act as an emulator to the Signaling Point under test. Level 3 tests require a message generating device to c

29、reate traffic, allowing protocol messages to be viewed for proper changeover, changeback, SIOS, FISU, etc. Intrusive Testing may impact a live working network. Therefore testing should be based on locally negotiated agreements. Non-Intrusive - The test unit shall be able to observe traffic, and/or m

30、essages traversing the link or links between the two Signaling Points under test in a monitor mode. 1.4 Other Testing Considerations The Government Emergency Telecommunications Service (GETS) and Wireless Priority Service (WPS) provide priority call completion to authorized users during times of net

31、work stress or congestion. GETS and WPS include the capability of coding the ISUP Calling Partys Category parameter with the NS/EP code point (11100010) and setting the SS7 MTP link level priority for IAM to 1. When performing MTP compatibility tests, SS7 MTP link level priority for IAM testing shou

32、ld be performed as described in Part D of Section 1, Introduction, of NGIIF Reference Document 5008: Installation, Testing and Maintenance Responsibilities for SS7 Links and Trunks, Part III - Attachment B, ISUP Compatibility Tests. 6 2 Test Scripts NGIIF Test #: ANSI T1-234-2000 Test #: GR-CORE-905

33、 Test # 2.1 Timer T2 M2-1.2 1.2 Timer T2 PROTOCOL REFERENCE: ANSI T1.111, chapter 3, clause 7 TITLE: Link State Control - Expected signal units/orders SUBTITLE: Timer T2 PURPOSE: To check “Not Aligned“ Timer T2 PRE-TEST CONDITIONS: Link out of service CONFIGURATION: 1 EXPECTED SIGNAL UNIT SEQUENCE:

34、SP B SP A Link Link 1-1 SIOS - :star : star _ |T4 (Pn) |:star _ | | T4 (Pe) | :star :star :star _ | :stop | _ :star (FIB + FSN=7F) 1-1 FISU corrupt FIB - (FIB + FSN=7F) 1-1 MSU - (FIB+FSN=80) a flag inserted within octet boundaries (BI+BSN=7F) (FIB + FSN=7F) Note: “80“ and “7F“ are hexadecimal numbe

35、rs. TEST DESCRIPTION: 1. The test unit (SP B) sends an MSU with a flag (Hex 7F) inserted within the octet boundaries. 2. The terminal being tested (SP A) shall discard the MSU up to the inserted flag, and the remaining portion of the original MSU beyond the flag insertion. 3. The terminal shall resp

36、ond with a negative acknowledgment. 18 NGIIF Test #: ANSI T1-234-2000 Test #: GR-CORE-905 Test # 2.13 Signal Unit Error Rate Monitor M2-4.1 6.1 Signal Unit Error Rate Monitor (Below Threshold) PROTOCOL REFERENCE: ANSI T1.111, chapter 3, subclause 10.2 TITLE: Signal Unit Error Rate Monitor check SUBT

37、ITLE: Error rate below threshold 1/256 - Link remains in service PURPOSE: To check the SUERM at a link error rate below threshold 1/256 PRE-TEST CONDITIONS: Link in service CONFIGURATION: 1 EXPECTED SIGNAL UNIT SEQUENCE: SP B SP A Link Link |1-1 FISU - (error rate below 1/256) TEST DESCRIPTION: 1. T

38、he test unit (SP B) sends good FISUs with a single corrupt FISU (e.g., invalid cyclic redundancy check CRC) inserted every 300 ms. 2. The test unit continues to send a single corrupt FISU every 300 ms for several minutes. 3. The link shall remain in service. 19 NGIIF Test #: ANSI T1-234-2000 Test #:

39、 GR-CORE-905 Test # 2.14 Signal Unit Error Rate Monitor M2-4.2 6.2 Signal Unit Error Rate Monitor (Above Threshold) PROTOCOL REFERENCE: ANSI T1.111, chapter 3, subclause 10.2 TITLE: SUERM check SUBTITLE: Error rate above threshold 1/256 - Link out of service PURPOSE: To check the SUERM at a link err

40、or rate above threshold 1/256 PRE-TEST CONDITIONS: Link in service CONFIGURATION: 1 EXPECTED SIGNAL UNIT SEQUENCE: SP B SP A Link Link |1-1 FISU - (error rate above 1/256) | | | 1-1 FISU - (64 corrupt FISUs) :star 1-1 4 corrupt FISUs - 1-1 4 corrupt FISUs - 1-1 4 corrupt FISUs - 1-1 4 corrupt FISUs

41、- _ | T4 (n) 1-1 good FISUs - | : star 1-1 4 corrupt FISUs - 1-1 4 corrupt FISUs - 1-1 4 corrupt FISUs - 1-1 4 corrupt FISUs - 1-1 4 corrupt FISUs - (BIB+BSN=7F) SLTM - SLTM_N - Choice of Option 1 or 2 1. FISU (No ACK SLTA_1) - SLTM_N+1 - (see note 3) (FIB+FSN=7F) 1-1 MSU - (FIB+FSN=80) (FIB+FSN=00)

42、 (FIB+FSN=80) - 1-1 FISU (BI+BSN=80) Note: “7F“, “80“, “00“, “FF“ are hexadecimal numbers. TEST DESCRIPTION: 1. The test unit (SP B) sends a MSU with an erroneous FIB. 2. The terminal being tested (SP A) shall discard the MSU received, and the next received FISU or MSU. A negative acknowledgment shall be returned to the test unit. 3. The test unit retransmits the MSU. A positive acknowledgment shall be returned by the terminal.