ITU-T Q 699 1-1998 Interworking between ISDN Access and Non-ISDN Access Over ISDN User Part of Signalling System No 7 Support of VPN Applications with PSS1 Information Flows - Seriof.pdf

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1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.699.1 (05198) SERIES Q: SWITCHING AND SIGNALLING Interworking of Signalling Systems - Interworking between Digital Subscriber Signalling System No. I and Signalling System No. 7 Interworking between ISDN ac

2、cess and non-ISDN access over ISDN user part of Signalling System No. 7: Support of VPN applications with PSSI information flows ITU-T Recommendation Q.699. I (Previously CCITT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1-

3、Q.3 INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.4-(2.59 Q.60-Q.99 Q.100-Q.119 SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 Q.120-Q.249 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 Q.25

4、0-Q.309 SPECIFICATIONS OF SIGNALLING SYSTEM RI Q.310-Q.399 SPECIFICATIONS OF SIGNALLING SYSTEM R2 Q.400-Q.499 DIGITAL EXCHANGES Q. 500-Q. 599 INTERWORKING OF SIGNALLING SYSTEMS Q.600-Q.699 General considerations Q.600-Q.609 Logic procedures Q.61 0-Q.697 Inteworking of Signalling Systems No. 7 and No

5、. 6 interwo System Q.698 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700-Q.849 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. I PUBLIC LAND MOBILE NETWORK Q.850-Q.999 Q.1000-(2.1 O99 INTERWORKING WITH SATELLITE MOBILE SYSTEMS Q. 11 00-Q.1199 INTELLIGENT NETWORK Q.1200-Q.1999 BROADBAND ISDN Q.2000-Q.2999 F

6、or further details, please refer to ITU-T List ofRecommendations. ITU-T RECOMMENDATION Q.699.1 INTERWORKING BETWEEN ISDN ACCESS AND NON-ISDN ACCESS OVER ISDN USER PART OF SIGNALLING SYSTEM No. 7: SUPPORT OF VPN APPLICATIONS WITH PSS1 INFORMATION FLOWS , Summary This Recommendation describes the inte

7、rworking for the support of VPN applications with PSS 1 information flows between Signalling System No. 7 (ISDN) and extended DSS1. Source ITU-T Recommendation Q.699.1 was prepared by ITU-T Study Group 11 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 15th of May 1998.

8、 Keywords APM, ASN. 1, DSS 1, ISUP, PSS 1, TCAP FOREWORD IT (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the IT. The IT-T is responsible for studyi

9、ng technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Grou

10、ps which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared

11、 on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the pra

12、ctice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation d

13、evelopment process. As of the date of approval of this Recommendation, the ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and ar

14、e therefore strongly urged to consult the TSB patent database. O IT 1998 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. Il Recommen

15、dation 4.699.1 (05/98) CONTENTS 1 2 3 4 I 5 I 5.1 I 5.2 5.3 5.4 6 6.1 6.2 Scope References Definitions Abbreviations . Signalling intenvorking specification for ISDN User Part (ISUP) Introduction Methodology . Outgoing call Sending of the Initial Address Message (IAM) . Incoming call VPN call with V

16、PN feature transparency 5.3.1 5.3.2 VPN call with VPN feature transparency 5.4.1 Signalling intenvorking specification for Transaction Capability User (TC-user) Intenvorking at the Originating local exchange . 6.1.1 6.1.2 6.1.3 6.1.4 Sending of the signalling connection establishment request . Recei

17、pt of the signalling connection establishment confirmation Sending and receipt of private network specific information after confirmation of the signalling connection establishment Release of the signalling connection . Interworking at the Destination local exchange . Sending ofthe SETUP message 6.2

18、.1 6.2.2 6.2.3 6.2.4 Sending of the signalling connection establishment confirmation Sending and receipt of private network specific information after confirmation of the signalling connection establishment Release of the signalling connection . Page 1 1 2 2 2 2 3 3 3 5 9 9 16 16 16 17 18 18 20 20 2

19、0 21 21 . Recommendation Q.699.1 (0998) 111 STD-ITU-T RECMN Qmb99.L-ENGL 1998 = 48b259L Ob52832 7TL M Recommendation Q.699.1 INTERWORKING BETWEEN ISDN ACCESS AND NON-ISDN ACCESS OVER ISDN USER PART OF SIGNALLING SYSTEM No. 7: SUPPORT OF VPN APPLICATIONS WITH PSSl INFORMATION FLOWS (Geneva, 1998) 1 S

20、cope This Recommendation describes interworking between Signalling System No. 7 (ISDN) and extended DSS1 for the support of VPN applications with PSSl information flows. For the intenvorking in this Recommendation related to ISUP, these replace that specified in Recommendation Q.699 whereas all othe

21、r interworking of PSS1 information flows is according to that specified in Recommendation 4.699. The intenvorking described here provides a sub-set of all possible intenvorking scenarios and is therefore intended to describe the relevant mapping of information flows between the two interfaces being

22、described. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject

23、 to revision; all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. ITU-T Recommendation 4.699

24、(1 997), Interworking between ISDN access and non-ISDN access over ISDN User Part of Signalling System No. 7. ITU-T Recommendation 4.763 (1997), Signalling System No. 7 - ISDN User Part formats and codes. ITU-T Recommendation 4.764 (1997), Signalling System No. 7 - ISDN User Part signalling procedur

25、es. ITU-T Recommendation 4.93 1 (1 998), ISDN user-network interface layer 3 specifzcation for basic call control. Annex M: Additional basic call signalling requirements for the support of private network interconnection for virtual private network applications. ITU-T Recommendation 4.932 (1 998), D

26、igital subscriber Signalling System No, I - Generic procedures for the control of ISDN supplementary services. Annex D: Enhancements for virtual private networks. ITU-T Recommendation 4.765 (1 998), Signalling System No. 7 - Application transport mechanism. ITU-T Recommendation 4.765.1 (1998), Signa

27、lling System No. 7 - Application transport mechanism: Support of VPN applications with PSSI information jlows. Recommendation Q.699.1 (05/98) 1 3 Definitions Within the scope of this Recommendation “VPN“ refers to a Virtual Private Network with the support of PSS1 information flows. 4 Abbreviations

28、This Recommendation uses the following abbreviations. ACM Address Complete Message ANM Answer Message APM Application Transport Mechanism APP Application Transport Parameter CLIP Calling Line Identification Presentation CLIR Calling Line Identification Restriction CN Corporate Telecommunications Net

29、work CNID Corporate Telecommunications Network Identifier COLP Connected Line Identification Presentation COLR Connected Line Identification Restriction CON Connect Message CPG Call Progress Message DSS1 IAM Initial Address Message IN Intelligent Network ISDN Integrated Services Digital Network ISUP

30、 ISDN User Part PINX PISN Private Integrated Services Network PRI Pre-Release Information Message PSS 1 REL Release Message VPN Virtual Private Network I l I I Digital Subscriber Signalling System No. 1 Private Integrated Services Network Exchange Private Network Q Reference Point Signalling System

31、No. 1 5 Signalling interworking specification for ISDN User Part (ISUP) 5.1 Introduction The following subclauses specifj the interworking between Signalling System No. 7 ISDN User Part (ISUP 2, 3, 6 and 7) and extended Digital Subscriber Signalling System No. 1 (DSS1 4 and SI) for the support of pr

32、ivate network interconnection in VPN applications. 2 Recommendation 4.699.1 (05/98) This Recommendation deschbes the ISUP-DSS 1 interworking of PSSl information flows between ISUP 2, 3 and 6 and extended DSSl 4 and 5. Where the intenvorking is defined in this Recommendation, these replace that speci

33、fied in i. All other interworking of PSS 1 information flows is according to that specified in i. NOTE - The description of the ISUP - extended DSSl intenvorking with reference to ISUP92 intenvorking document (reference i) may not fully cover all intenvorking aspects since the ISUP97 specific basic

34、call and supplementary services intenvorking aspects are not documented in reference i. 5.2 Methodology APM-user information segmentation The actions described in the following subclauses on receipt of Application Transport Parameters (APP) take place only after the completion of the segmentation an

35、d reassembly procedure specified in reference 6. When it is said in the text that an Application Transport (APP) parameter is received in an ISUP message, in case of segmentation it could be received as well in an Application Transport message (APM) containing segmented information linked to that me

36、ssage. 5.3 Outgoing call 5.3.1 If the access has extended DSSl capability and if the exchange has determined that it is a VPN call requesting support of PSSl information flows, the Initial Address Message (IAM) sent is coded as described in 2.1.1. UQ.699 i with the following modifications. Sending o

37、f the Initial Address Message (IAM) Called party number Add the following sentence: The called party number parameter is generated by the VPN Application Process. Application Transport See Table 1. Recommendation 4.699.1 (0998) 3 Table VQ.699.1- Contents of the Application Transport Parameter SETUP*

38、-+ Content Non-1ockingLocking shift Transit counter Calling party number Facility with Protocol profile value set to “Networking Extensions“ I Notification indicator i Ian Application Transport parameter Application Context Identifier “PSSl ASE (VPN)“ Gateway PINX Transformation capability (Note 1)

39、Corporate Telecommunications Network Identifier (CNID) Indicator (Note 2) Corporate Telecommunications Network Identifier (CNID) length (Note 2) Corporate Telecommunications Network Identifier (CNID) (Note 2) Non-locking/Locking shift Transit counter Calling party number Called party number Facility

40、 with Protocol profile value set to “Networking Extensions“ Notification indicator NOTE 1 - The “Gateway PINX Transformation capability“ indication is optional and is coded as described in clause 14/Q.765.1 7. NOTE 2 - The Corporate Telecommunications Network Identifier length and Corporate Telecomm

41、unications Network Identifier are only included when the CNID Indicator is coded “Network specific (Network option)“ or “Global value“. The CNID Indicator, CNID length and CNID are either derived from information received from the calling user in the CN indicator and CN identifier fields of the VPN

42、indicator information element in the SETUP message or have an implicit value tied to the incoming access. Generic number This may be required if the network obtains the public called party number from a number translation of the private called party number at an IN node if this IN node is situated a

43、t another exchange within the public network. The mechanism as described here can only be used in the case that a Corporate Telecommunications Network can be uniquely identified. Replace item about Generic number in 2.1.1. UQ.699 i by: The calling party number received in the Calling party number in

44、formation element of the SETUP message is transferred in the generic number parameter with the number qualifier indicator coded “additional calling party number“ without taking into account the public CLIR and the CLIP supplementary services. 4 Recommendation Q.699.1 (05/98) STDmITU-T RECMN Q*b99*1-

45、ENGL 1998 m Lt8b2591 Ob5281b 397 m Called/Calling Party Number information element Type of Number indication Unknown The called party number received in the Called party number information element of the SETUP message is transferred in the generic number parameter with the number qualifier indicator

46、 coded “additional called party number“. See Table 2. Generic Number parameter Nature of address indicator Unknown Table 2lQ.699.1- Mapping of values when intenvorking to the Generic Number parameter Level O Regional number Level 1 Regional number Subscriber number National (significant) Facility No

47、tification indicator I Level 2 Regional number I International number I Facility Notification indicator I PISN specific number I PISN specific number -1 5.3.2 The originating exchange knows that the VPN call does support PSSl information flows continuity when the VPN feature transparency indication

48、is received coded “Call with VPN feature transparency capability“ in an application transport parameter with the Application Context Identifier coded “PSSl ASE (VPN)“ in the Address Complete Message (ACM) or in a Call Progress Message (CPG) or in the Connect Message (CON) or in the Answer Message (A

49、NM) or in the Pre-Release Information Message (PRI) or in an Application Transport Message (APM). From the receipt of this explicit information, the originating exchange shall apply the following subclauses. VPN call with VPN feature transparency 5.3.2.1 Upon receipt of an Address Complete Message (ACM), the exchange shall apply the actions described in 2.1.1.3/Q.699 11 with the following modifications. Facility/Notification indicator Add the following Table 3 : Receipt of the Address Complete Me