ECMA TR 57-1999 Private Integrated Services Networks《专用综合业务网络 第2版》.pdf

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1、ECMA Technical Report TR/572nd Edition - June 1999Standardizing Information and Communication SystemsPhone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.chPrivate Integrated Services Networks.ECMA Technical Report TR/572nd Edition - June 1999Standardizin

2、g Information and Communication SystemsPhone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.chIW TR-57.DOC 28-06-99 16,04Private Integrated Services Networks.Brief HistoryThis Technical Report is the foundation for a series of standards applicable to Priv

3、ate Integrated Services Networks(PISNs). It includes guidelines for the definition and control of- PISN-to-ISDN connections,- intra-PISN connections,- PISN addressing and routeing aspects, and- PISN telecommunication services,It is based on the ISDN concepts as developed by ITU-T and it is also with

4、in the framework of standards for opensystems interconnection as defined by ISO.In addition to the first edition (published in 1991) the second edition recognizes the generalization of the corporatenetwork (CN) concept: CNs may comprise intranet technology (IP technology), in addition to PISN techno

5、logy.The Technical Report is based on the practical experience of ECMA member companies and the results of theiractive and continuous participation in the work of ISO, ITU-T, and various regional and national standardizationbodies in Europe and in the USA. It represents a pragmatic and widely based

6、consensus.Adopted as 2nd Edition of Technical Report TR/57 by the General Assembly of June 1999.- i -Table of contentsSection 1 - General 11Scope 12 Field of application 13 References 14 Definitions 34.1 Corporate telecommunication Network (CN) 34.2 PISN Access 34.3 Inter-PINX Connection 34.4 Interc

7、onnecting Network 34.5 Internet 34.6 Intervening Network 44.7 Intranet 44.8 Private Integrated Services Network (PISN) 44.9 Private Integrated Services Network Exchange (PINX) 44.10 User 44.11 PISN User 44.12 Virtual Private Network (VPN) 45 Abbreviations 46 Structure of this Technical Report 6Secti

8、on 2 - Basic Concepts 77 Reference Configuration for PINX Calls 78 Architecture 98.1 PISN Topology 98.2 Routeing Hierarchy 108.3 Capability Structures of a PISN 118.4 Capabilities of a PISN 118.4.1 PISN Low Layer Capabilities 128.4.2 Access Capability 148.5 PISNs connected to the Public ISDN 148.5.1

9、 Interworking of PISN and Public ISDN Capabilities 148.5.2 Solutions for Accessing the Public ISDN Packet Switching Capabilities 158.6 Interconnected PINXs 178.6.1 Overlay Concept 188.6.2 Capability Structure of a PISN Employing IVNs or ICNs 199 Extended Protocol Reference Model 219.1 Planes for Com

10、munication across the IVN 21- ii -9.1.1 IVN Control Plane (NC) 219.1.2 IVN User Plane (NU) 219.2 Planes for Communication across the PISN 219.2.1 PISN Control Plane (PC) 219.2.2 PISN User Plane (PU) 219.3 Planes for Communication across the PISN Access 219.3.1 TE Control Plane (TC) 219.3.2 TE User P

11、lane (TU) 219.4 Planes for Communication across an ICN 21Section 3 - Inter-PINX Connections 2310 Introduction 2310.1 Multiple Instances of Q and C Reference Points 2310.2 Shared Access Use 2310.3 Mapping Functional Grouping (MP) 2311 Scenarios 25Section 4 - CN Addressing 2512 General 2512.1 Smallest

12、 Addressable Entity in a PISN 2512.2 Addressing Principles 2812.2.1 The ISO Global OSI Network Addressing Principle 2912.2.2 The ITU-T ISDN Addressing Principle 2912.2.3 The Domain Specific Part Addressing Principles 3012.3 Purpose of Addresses 3012.3.1 Selection 3012.3.2 Identification 3012.4 Addre

13、ss Interworking 3212.5 Address Values of the Public ISDN Addressing Domain 3212.6 Addressing Principles in LANs 3213 CN numbering impact on public networks and their numbering plans 3213.1 Current Situation 3213.2 Ideal Situation 3313.2.1 Structure of the globally unique CN Number 3314 PISN Numberin

14、g Concept 3414.1 Numbering Plans of PISNs 3414.2 Private Numbering Plan Structure 3514.3 Content of the Number Information in a Private Numbering Plan 3514.4 Reference Configuration for PISN Address Treatment 3514.5 Knowledge about other Numbering Plans 36- iii -15 Support of subaddressing in PISNs

15、3615.1 Embedment of OSI Network Layer Addresses in Concatenated PISN Addressing Information 3615.2 Embedment of Other Information in the Subaddress 3715.3 Conveyance of Subaddresses through a PISN 37Section 5 - Routeing 3716 General 3817 Routeing Requirements 3817.1 Functional Requirements 3817.1.1

16、Factors Influencing Routeing through a PISN 3917.1.2 Factors Influencing Routeing to Another Network 3917.1.3 Factors Influencing the Selection of Networks beyond the Next Network 4017.1.4 Other Factors Influencing Route Selection 4017.2 Performance Requirements 4018 Routeing Mechanisms 4018.1 Route

17、ing Information Base 4018.2 Source and Destination Routeing 4118.2.1 Advantages of Source Routeing Compared with Destination Routeing 4118.2.2 Advantages of Destination Routeing Compared with Source Routeing 4118.2.3 Hybrid Methods 4218.2.4 Impact on Signalling for Call Control 4218.3 Subjects for S

18、tandardization 43Section 6 - Services 4319 General Service Considerations 4319.1 Classification of Services 4319.2 Control of Basic Services 4319.3 Control of Supplementary Services 4419.4 Specification Method for ECMA Standards on Services 4419.4.1 Service Model for Stage 1 Specifications 4419.4.2

19、Service Model for Stage 2 Specifications 4519.5 Relationship to Services Provided in Public ISDNs 4519.6 Service Interworking between PISNs and Public ISDNs 4619.7 Additional Network Features 48Annex A - Off-premises PISN Users 49Annex B - PINX Connections to Public ISDNs 51Annex C - Interworking fo

20、r Identification Numbers between Public ISDN and PISN 53.- iv -.Section 1 - General1ScopeAs a portion, a Corporate telecommunication Network (CN) can comprise a Private Integrated ServicesNetwork (PISN) which provides connection oriented switching and transmission functions for the provisionof telec

21、ommunication services to its users which are similar to those provided by public ISDNs. In addition,a PISN can also extend to its users services provided by public ISDNs. Public ISDNs are described in ITU-Trecommendations.As another portion, CNs can employ connectionless services, as offered by inte

22、rnet and intranet technology(“IP technology”).This Technical Report concentrates on the issues of narrow-band PISNs (N-PISN). N-PISN are based on theswitching capability of 64 kbit/s channels.The main purpose of a CN, and in the context of this Technical Report thus of a PISN, is to serve thecommuni

23、cation needs of an organization rather than to provide services to the general public.A PISN comprises one or more interconnected Private Integrated Services Network Exchanges (PINXs) andtheir interconnecting links as provided by intervening networks. It may also be supported by Virtual PrivateNetwo

24、rk (VPN) features offered by an interconnecting network.This Technical Report discusses some of the technical aspects of PISNs and identifies areas forstandardization. It also provides a common framework of concepts and terminology for standards in thisfield.The discussion of VPN features provided b

25、y an interconnecting network is beyond the scope of thisTechnical Report. However, if VPN features are offered by other networks, they should follow the conceptsestablished in this Technical Report and related Standards for PISNs consisting of PINXs. For VPNs seeETSI TCRTR 033.Management aspects of

26、PISNs are not subject of this Technical Report.2 Field of applicationThis Technical Report applies to:- Private Integrated Services Networks and their exchanges, e.g. Integrated Services Private BranchExchanges (ISPBX) and/or Integrated Services Centrexes (ISCTX);- Intervening Networks, e.g. public

27、ISDNs, which are employed to support Private TelecommunicationNetworks by providing transmission links between PINXs without interacting in the services of the PISN;- Interconnecting Networks, e.g. the transmission, switching and possibly service capabilities offered bypublic ISDNs to support PISNs;

28、- Public ISDNs with regard to support of interworking with PISNs or PINXs.3 ReferencesECMA-133 Private Integrated Services Network (PISN) - Reference Configuration for PISNExchanges (PINX)ECMA-142 Private Integrated Services Network (PISN) - Circuit Mode 64kbit/s Bearer Services -Service Description

29、, Functional Capabilities and Information Flows (BCSD)ISO/IEC 7498-3 Information technology - Open Systems Interconnection - Basic Reference Model:Naming and addressingISO/IEC 8348 Information technology - Open Systems Interconnection - Network Service DefinitionISO/IEC 10589 Information technology

30、- Telecommunications and information exchange betweensystems - Intermediate system to Intermediate system intra-domain routeing- 2 -information exchange protocol for use in conjunction with the protocol for providingthe connectionless-mode Network Service (ISO 8473)ISO/IEC TR 9575 Information techno

31、logy - Telecommunications and information exchange betweensystems - OSI Routeing FrameworkETSI TCRTR 033 Business TeleCommunications (BTC); Private Telecommunication Network (PTN);Integrated scenario for business communicationsETS 300 011 Integrated Services Digital Network (ISDN) Basic User Network

32、 Interface Layer 1Specification and Test PrinciplesETS 300 012 Integrated Services Digital Network (ISDN) Primary Rate User Network InterfaceLayer 1 Specification and Test PrinciplesNOTEFor the ITU-T recommendations listed below the Blue Book version, (CCITT, Melbourne 1988) shall apply.ITU-T Rec. E

33、.164 Numbering Plan for the ISDN eraITU-T Rec. F.69 Plan for telex destination codesITU-T Rec. I.130 Method for the characterization of telecommunication services supported by anISDN, and network capabilities of an ISDNITU-T Rec. I.210 Principles of telecommunication services supported by an ISDN an

34、d the means todescribe themITU-T Rec. I.220 Common dynamic description of basic telecommunication servicesITU-T Rec. I.230 Definition of bearer service categoriesITU-T Rec. I.240 Definition of teleservicesITU-T Rec. I.310 ISDN - Network functional principlesITU-T Rec. I.320 ISDN protocol reference m

35、odelITU-T Rec. I.324 ISDN network architectureITU-T Rec. I.325 Reference configuration for ISDN connection typesITU-T Rec. I.330 ISDN numbering and addressing principlesITU-T Rec. I.333 Terminal selection in ISDNITU-T Rec. I.334 Principles relating ISDN numbers/sub-addresses to the OSI reference mod

36、el networklayer addressesITU-T Rec. I.411 ISDN user-network interfaces Reference configurationsITU-T Rec. I.412 ISDN user-network interfaces Interface structures and access capabilitiesITU-T Rec. Q.513 Exchange interfaces for operations, administration and maintenanceITU-T Rec. Q.931 /ETS 300 102 IS

37、DN user-network interfaces - Layer 3 specificationITU-T Rec. X.25 Interface between Data Terminal Equipment (DTE) and Data Circuit-terminatingEquipment (DCE) for terminals operating in the packet mode and connected to publicdata networks by dedicated circuitITU-T Rec. X.31 Support of packet mode ter

38、minal equipment by an ISDNITU-T Rec. X.75 Packet-switched signalling system between public networks providing datatransmission servicesITU-T Rec. X.121 International numbering plan for public data networksITU-T Rec. X.200 Reference model for Open Systems Interconnection for ITU-T applications- 3 -4

39、DefinitionsFigure 1 gives an overview of a number of terms defined below.PISN UserInterveningNetworksPINX(ISPBX)IVNPublic ISDN equipmentICN(transitPINX)OpenISDNcallsPINX(ISCTX)GTWGTWGTWGTWPINX(ISPBX)TEIVNPISN UserTEPISN UserTEFigure 1 - Terminology in the Private Integrated Services Network Environm

40、entNOTEIn most of its recommendations (Blue Book, Melbourne 1988), ITU-T globally distinguishes between “User“and “Network“, without further distinction between NT2 and TE. Furthermore, the special case of a PINX asone specific NT2 representative has not been covered by ITU-T. However, any specifica

41、tion applicable tothe PISN environment needs a more specific terminology, which is able to cover different types of PINXs(e.g. ISPBXs and ISCTXS), in a non-discriminatory way.4.1 Corporate telecommunication Network (CN)A telecommunication network serving a corporation, i.e. a single organization, an

42、 extended enterprise, oran industry application group as defined by the International Chamber of Commerce (ICC).4.2 PISN AccessThe line connecting a terminal (or in the case of multipoint configurations: terminals) to a PINX.4.3 Inter-PINX ConnectionThe connection between two inter-connected PINXs.

43、It is supported by an intervening network.4.4 Interconnecting NetworkA third-party network (typically using public ISDN infrastructure) providing transmission, switching andservice capabilities for the purpose of linking two or more PINXs by means of inter-PINX call control.4.5 InternetA public conn

44、ectionless network.- 4 -4.6 Intervening NetworkA network which intervenes between any two PINXs in order to provide inter-PINX connections.4.7 IntranetAn internet dedicated to the private use of a corporation.4.8 Private Integrated Services Network (PISN)A network comprising one or more interconnect

45、ed PINXs. The PISN provides PISN services to its userswhich are based on those provided by its PINXs. A PISN may comprise more than one PINX spread overmore than one user premises. In this case, inter-PINX connections between the PINXs serving theindividual premises are required. The inter-PINX conn

46、ections are considered part of the PISN.In the context of this Technical Report a PISN is considered a private ISDN.4.9 Private Integrated Services Network Exchange (PINX)A nodal entity in a PISN which provides autonomous and automatic switching and call handling functionsused for the provision of t

47、elecommunication services which are based on those specified for public ISDNs.NOTEIf applicable, a PINX provides:- telecommunication services within its own area, and/or- telecommunication services from a public ISDN, and/or- telecommunication services from other public or private networks, and/or-

48、within the context of a PISN, telecommunication services from other PINXsto users of the same and/or another PINX.A PINX may be represented by an ISPBX, or by equipment which is physically part of the equipment of,for example, a public ISDN local exchange.4.10 UserThe generic term for an entity, i.e

49、. a process or human being, using, via the terminal, the network layerservice provided by a network, independently of whether this is in a PISN, a public ISDN or anothernetwork.4.11 PISN UserA user of the network layer service provided by a PISN.4.12 Virtual Private Network (VPN)The capabilities of third-party provided networks (typically using public ISDN infrastructure) to emulateISCTX and/or ICN functions for a given PISN.5 AbbreviationsADD AddendumAFI Authority and Format IdentifierAHLF Additional High Layer FunctionALLF Additional Low Layer FunctionBHLF Basic High Layer Functio