ISO IEC 21411-2001 Information technology - Telecommunications and information exchange between systems - Corporate telecommunication networks Signalling interw.pdf

1、Reference number ISO/IEC 21411:2001(E) ISO/IEC 2001 INTERNATIONAL STANDARD ISO/IEC 21411 First edition 2001-08-15 Information technology Telecommunications and information exchange between systems Corporate telecommunication networks Signalling interworking between QSIG and H.323 Call diversion supp

2、lementary services Technologies de linformation Tlcommunications et change dinformation entre systmes Rseaux de tlcommunications corporatifs Signalisation de travail entre QSIG et H.323 Services supplmentaires de diversion dappelISO/IEC 21411:2001(E) PDF disclaimer This PDF file may contain embedded

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5、 optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO/IEC 2001 All rights reserved. Unless otherwise spec

6、ified, 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 either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office C

7、ase postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO/IEC 2001 All rights reservedISO/IEC 21411:2001(E) ISO/IEC 2001 All rights reserved iii Contents Foreword v Introduction vi 1 Scope 1 2 Conformance 1 3 Nor

8、mative references 1 4 Definitions 2 4.1 External definitions 2 4.2 Other definitions 2 4.2.1 Association D 2 4.2.2 Association E 2 4.2.3 Association F 2 4.2.4 Association G 2 4.2.5 Entity A 2 4.2.6 Entity B 2 4.2.7 Entity B 2 4.2.8 Entity C 2 4.2.9 Entity D 2 4.2.10 Entity E 3 4.2.11 Entity F 3 4.2.

9、12 Entity G 3 4.2.13 Entity H 3 4.2.14 Gateway 3 4.2.15 Leg A 3 4.2.16 Leg B 3 4.2.17 Leg B 3 4.2.18 Leg C 3 4.2.19 Rerouting entity 3 4.2.20 Scenario A1 3 4.2.21 Scenario A2 3 4.2.22 Scenario B1 3 4.2.23 Scenario B2 3 4.2.24 Scenario C1 3 4.2.25 Scenario C2 3 4.2.26 Scenario D1 3 4.2.27 Scenario D2

10、 3 4.2.28 Scenario E1 3 4.2.29 Scenario E2 3 4.2.30 Scenario F1 3 4.2.31 Scenario F2 3 4.2.32 Scenario G1 3 4.2.33 Scenario G2 3 5 Acronyms 4 6 Service architecture 4 6.1 Service architecture for invocation and operation 4 6.1.1 ISO/IEC 13873 service architecture 4ISO/IEC 21411:2001(E) iv ISO/IEC 20

11、01 All rights reserved 6.1.2 H.450.3 service architecture 5 6.1.3 Scenarios for interworking 5 6.1.4 Determination of the location of the rerouting entity when interworking 6 6.2 Service architecture for activation, deactivation and interrogation 6 6.2.1 ISO/IEC 13873 service architecture 6 6.2.2 H.

12、450.3 service architecture 7 6.2.3 Scenarios for interworking 7 7 Protocol interworking General requirements 8 8 Protocol interworking Messages and APDUs 8 8.1 Scenario A1 8 8.2 Scenario A2 10 8.3 Scenario B1 11 8.4 Scenario B2 12 8.5 Scenario C1 12 8.6 Scenario C2 13 8.7 Scenario D1 13 8.8 Scenario

13、 D2 14 8.9 Scenario E1 14 8.10 Scenario E2 15 8.11 Scenario F1 15 8.12 Scenario F2 16 8.13 Scenario G1 16 8.14 Scenario G2 17 Annexes A-Implementation Conformance Statement (ICS) proforma 18 B-Example message sequence diagrams 28ISO/IEC 21411:2001(E) ISO/IEC 2001 All rights reserved v Foreword ISO (

14、the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees

15、 established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.

16、International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circul

17、ated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO and IEC shall

18、 not be held responsible for identifying any or all such patent rights. International Standard ISO/IEC 21411 was prepared by ECMA (as ECMA-309) and was adopted, under a special “fast-track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approval b

19、y national bodies of ISO and IEC. Annex A forms a normative part of this International Standard. Annex B is for information only.ISO/IEC 21411:2001(E) vi ISO/IEC 2001 All rights reserved Introduction This International Standard is one of a series of Standards defining the interworking of services an

20、d signalling protocols deployed in Corporate telecommunication Networks (CNs). The series uses telecommunication concepts as developed by ITU-T and conforms to the framework of International Standards on Open Systems Interconnection as defined by ISO/IEC. This International Standard defines the sign

21、alling protocol interworking for call diversion supplementary services between a Private Integrated Services Network (PISN) and a packet-based private telecommunications network based on the Internet Protocol (IP). It is further assumed that the protocol for the PISN part is that defined for the Q r

22、eference point (QSIG) and that the protocols for the IP-based network are based on ITU-T Recommendation H.323. This International Standard is based upon the practical experience of ECMA member companies and the results of their active and continuous participation in the work of ISO/IEC JTC 1, ITU-T,

23、 ETSI and other international and national standardization bodies. It represents a pragmatic and widely based consensus.INTERNATIONAL STANDARD ISO/IEC 21411:2001(E) Information technology - Telecommunications and information exchange between systems - Corporate telecommunication networks - Signallin

24、g interworking between QSIG and H.323 - Call diversion supplementary services ISO/IEC 2001 All rights reserved 1 1S c o p e This International Standard specifies signalling interworking between “QSIG” and “H.323” in support of call diversion supplementary services within a Corporate telecommunicatio

25、n Network (CN). “QSIG” is a signalling protocol that operates at the Q reference point between Private Integrated Services eXchanges (PINX) within a Private Integrated Services Network (PISN). The Q reference point is defined in ISO/IEC 11579-1. A PISN provides circuit-switched basic services and su

26、pplementary services to its users. QSIG is specified in other Standards, in particular ISO/IEC 11572 (call control in support of basic services), ISO/IEC 11582 (generic functional protocol for the support of supplementary services) and a number of standards specifying individual supplementary servic

27、es. ISO/IEC 13873 specifies the QSIG protocol in support of call diversion services. “H.323” is a set of signalling protocols for the support of voice or multimedia communication within a packet network, in particular a packet network that uses the Internet Protocol (IP) as its network layer protoco

28、l (IP network). H.323 signalling protocols operate between endpoints in an IP network, either indirectly via one or more gatekeepers, or directly. An endpoint can be a terminal or a gateway to another network. H.323 is an “umbrella” recommendation referring to various ITU-T recommendations, in parti

29、cular Recommendations H.225.0 and H.245 (basic communication capabilities) and Recommendation H.450.1 (generic functional protocol for the support of supplementary services). Recommendation H.450.3 specifies the H.323 protocol in support of call diversion services. NOTE - H.450.3 applies only to the

30、 1998 version of H.323 (also known as H.323 version 2) and to later versions. In both ISO/IEC 13873 (QSIG) and ITU-Recommendation H.450.3 (H.323), the call diversion supplementary services are Call Forwarding Unconditional (SS-CFU), Call Forwarding Busy (SS-CFB), Call Forwarding No Reply (SS-CFNR) a

31、nd Call Deflection (SS-CD). These supplementary services apply during call establishment and provide diversion of an incoming call to another destination. Interworking between QSIG and H.323 permits a call originating at a user of a PISN to terminate at a user of an IP network, or a call originating

32、 at a user of an IP network to terminate at a user of a PISN. This International Standard provides the following additional capabilities: a call originating from a PISN and destined for a user of an H.323 network to be diverted by the H.323 network to an alternative destination; a call originating f

33、rom an H.323 network and destined for a user of a PISN to be diverted by the PISN to an alternative destination; a call destined for a user of a PISN to be diverted to an alternative destination where that alternative destination is in an H.323 network; a call destined for a user of an H.323 network

34、 to be diverted to an alternative destination where that alternative destination is in a PISN. This International Standard is applicable to any interworking unit that can act as a gateway between a PISN employing QSIG and an IP network employing H.323. 2 Conformance In order to conform to this Inter

35、national Standard, a gateway shall satisfy the requirements identified in the Implementation Conformance Statement (ICS) proforma in annex A. 3 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International

36、 Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indica

37、ted below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.ISO/IEC 21411:2001(E) 2 ISO/IEC 2001 All rights reserved ISO/IEC 11572:2000, Information technology - Telecommunic

38、ations and information exchange between systems - Private Integrated Services Network - Circuit mode bearer services - Inter-exchange signalling procedures and protocol ISO/IEC 11579-1:1994, Information technology - Telecommunications and information exchange between systems - Private integrated ser

39、vices network - Part 1: Reference configuration for PISN Exchanges (PINX) ISO/IEC 11582:1995, Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Generic functional protocol for the support of supplementary services - Inter-exc

40、hange signalling procedures and protocol ISO/IEC 13873:1995, Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Call diversion supplementary services ISO/IEC 21409:2001, Information technol

41、ogy - Telecommunications and information exchange between systems - Corporate telecommunication networks - Signalling interworking between QSIG and H.323 - Generic functional protocol for the support of supplementary services ITU-T Rec. H.225.0:1998 (or later edition), Call signalling protocols and

42、media stream packetization for packet-based multimedia communication systems ITU-T Rec. H.245:1998 (or later edition), Control protocol for multimedia communication ITU-T Rec. H.323:1998 (or later edition), Packet-based multimedia communications systems ITU-T Rec. H.450.1:1998, Generic functional pr

43、otocol for the support of supplementary services in H.323 ITU-T Rec. H.450.3:1998, Call diversion supplementary service for H.323 4 Definitions For the purposes of this International Standard, the following definitions apply. 4.1 External definitions This International Standard uses the following te

44、rms defined in other documents: Call (ISO/IEC 21409) Corporate telecommunication Network (CN) (ISO/IEC 21409) Endpoint (ITU-T Rec. H.323) Gatekeeper (ITU-T Rec. H.323) IP network (ISO/IEC 21409) Private Integrated Services Network (PISN) (ISO/IEC 21409) Private Integrated services Network eXchange (

45、PINX) (ISO/IEC 11579-1) Additionally the definitions in ISO/IEC 13873 and ITU-T Recommendation H.450.3 apply as appropriate. 4.2 Other definitions 4.2.1 Association D : Signalling association between entity D and entity G. 4.2.2 Association E : Signalling association between entity E and entity G. 4

46、2.3 Association F : Signalling association between entity F and entity G. 4.2.4 Association G : Signalling association between entity G and entity H. 4.2.5 Entity A : Signalling entity at the PINX or H.323 endpoint serving the calling user (user A). 4.2.6 Entity B : Signalling entity at the PINX se

47、rving the diverting user (user B) or H.323 entity that invokes diversion on behalf of user B. 4.2.7 Entity B : Signalling entity at the H.323 endpoint serving user B. 4.2.8 Entity C : Signalling entity at the PINX or H.323 endpoint serving the diverted-to-user (user C). 4.2.9 Entity D : Signalling e

48、ntity at the PINX or H.323 endpoint serving an activating user.ISO/IEC 21411:2001(E) ISO/IEC 2001 All rights reserved 3 4.2.10 Entity E : Signalling entity at the PINX or H.323 endpoint serving a deactivating user. 4.2.11 Entity F : Signalling entity at the PINX or H.323 endpoint serving an interrog

49、ating user. 4.2.12 Entity G : Signalling entity for activation / deactivation / interrogation at a PINX or H.323 endpoint serving a diverting endpoint. 4.2.13 Entity H : Signalling entity for restriction checking at a PINX or H.323 endpoint serving a diverted-to endpoint. 4.2.14 Gateway : A gateway as defined in H.323 specifically for the purpose of interworking with a network employing QSIG. 4.2.15 Leg A : Call segment that lies between entity A and the rerouting entity. 4.2.16 Leg B : Call segme