1、Standard ECMA-1332nd Edition - December 1998Standardizing 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 Network(PISN) -Reference Configuration for PISNExchanges (PINX).Standard ECMA
2、-1332nd Edition - December 1998Standardizing Information and Communication SystemsPhone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.chIW Ecma-133.doc 21-12-98 09,38Private Integrated Services Network(PISN) -Reference Configuration for PISNExchanges (PI
3、NX).Brief HistoryThe purpose of a reference configuration (RC) is to define reference points by means of identifying functionalgroupings which interwork at the reference points.Suitable definitions of functional groupings allow the proper definition of the behaviour and/or performance of suchgroupin
4、gs, merely by referring to the corresponding reference points.This applies to aspects such as:G01 delimitation of areas of responsibility, e.g. for management, operation etc.;G01 partitioning and apportioning of performance values;G01 numbering;G01 termination of signalling protocols;G01 etc.This pa
5、rticular Standard defines the RC for a 64 kbit/s-based Private Integrated Services Network (PISN) exchange(PINX), including a description for modelling complete PISNs consisting of more than one PINX. It also forms acomponent for a RC for high-speed-PISNs (HS-PISN), i.e. PISNs which may be based on
6、technologies such asbroad-band ISDN, LAN, etc. The particularities for HS-PISN will be specified in other parts of this Standard.In addition to the user-to-ISDN reference configuration specified in ITU-T Rec. I.411 which allows the exchanges ofa private integrated services network (PISN) to interwor
7、k with a public ISDN in a Concatenation Scenario,ISO/IEC 11579 specifies a reference configuration which allows to specify the functions which apply to the controlof connections and calls between any two exchanges of a given PISN.The concept of this Standard is based on the assumption that such inte
8、r-PISN-exchange connections are routedthrough an intervening network, which can be of any nature from, in the trivial case, a mere physical medium like apiece of wire, up to a switching network, such as the public ISDN, provided it offers the required capabilities forcarrying user and control inform
9、ation between the PISN exchanges. In the case that the IVN is represented by apublic ISDN, the PISN and the public ISDN interwork in an Overlay Scenario.For further information on the Concatenation and the Overlay Scenarios see annex B.In general, inter-PISN-exchange calls require that any two inter
10、connected PISN exchangesG01 can be provided with bearer capabilities between each other, which support and satisfy the requirements asrequested by the users of the PISN; andG01 can interchange control information, which allows mutual control of network layer connections, including thecontrol of supp
11、lementary services, if applicable; andG01 can interchange management information, enabling management actions with regard to, e.g., the use andsupervision of the user information channels.Reference point Q has been defined as a conceptual point (e.g. not as a real interface) where the exchange of co
12、n-nection control information between PISN exchanges shall be specified. Reference point C has been defined as aninterface point where the access parameters and procedures and, if applicable, the control information between thePISN exchanges and the intervening network shall be specified.Annex A sho
13、ws the various information flows terminating at the reference points specified in this ECMA Standard.Compared to the 1st Edition of Standard ECMA-133 (published by ECMA in April 1989), this 2nd Edition has beenextended to achieve complete alignment with International Standard ISO/IEC 11579-1:1994(E)
14、.Except for the existence of a conformance clause in this ECMA Standard there are no other differences between thisECMA Standard and International Standard 11579-1.Adopted as 2nd Edition of Standard ECMA-133 by the General Assembly of December 1998.- i -Table of contents1 Scope 12 Conformance 13 Nor
15、mative references 14 Symbols and abbreviations 15 Definitions 25.1 Reference Configuration 25.2 Functional grouping 25.3 Reference Point (RP) 25.4 Private Integrated Services Network (PISN) 25.5 Private Integrated Services Network Exchange (PINX) 25.6 Inter-PINX Connection (IPC) 25.7 Intervening Net
16、work (IVN) 26 PINX Reference Configuration 36.1 Terminal Equipment (TE) 36.2 Private Termination System functional grouping (PTS) 36.3 Switching functional grouping (SW) 36.4 Mapping functional grouping (MP) 36.5 Public ISDN Access Termination functional grouping (PIAT) 36.6 Inter-PINX Connection Co
17、ntrol functional grouping (ICC) 36.7 Call Control functional grouping (CC) 36.8 Scenario management 37 Reference points (RP) 47.1 C reference point 47.2 Q reference point 47.3 S reference point 47.4 T reference point 48 Use of the PINX Reference Configuration 48.1 Multiple instances of Q reference p
18、oint 48.2 Multiple instances of C reference point 58.3 Multiple IVN interfaces 58.4 Shared interface use 5Annex A - Termination of signalling information flows 7Annex B - Public ISDN / PISN interworking scenarios 9Annex C - Example of a PISN employing multiple instances of Q reference points 11Annex
19、 D - Example for the application of the PINX reference configuration to a PISN 13- ii -.1ScopeThis ECMA Standard specifies a reference configuration (RC) for private integrated services network ex-changes (PINXs) for their interconnection to form private integrated services networks (PISNs). Theconf
20、iguration is not intended to require any specific implementation of a PINX, but only to provide guidancefor the specification of PINX capabilities.This RC is sufficient to support ISDN-like applications. It can be extended to also support non-ISDN-likeapplications.This RC describes a conceptual PINX
21、. By combining multiple PINXs to a private integrated services networkthe RC becomes applicable to a PISN.2 ConformanceOther standards specifying PISN or PINX capabilities conform to this Standard if they adhere to thedefinitions and employ the concepts described in clauses 5, 6 and 7 of this Standa
22、rd.3 Normative referencesThe following publications contain provisions which, through reference in this text, constitute provisions ofthis Standard. All publications are subject to revision, and parties to agreements based on this Standard areencouraged to investigate the possibility of applying the
23、 most recent editions of the publications listed below.IUT-T Rec. I.411 ISDN user-network interfaces Reference configurations (1993)IUT-T Rec. I.570 Public/private ISDN interworking (1993)4 Symbols and abbreviationsCC Call Control functional groupingICC Inter-PINX Connection Control functional group
24、ingIPC Inter-PINX ConnectionISCTX Integrated Services CentrexISPBX Integrated Services Private Branch ExchangeIVN InterVening NetworkMP Mapping functional groupingPIAT Public ISDN Access Termination functional groupingPINX Private Integrated Services Network ExchangePISN Private Integrated Services
25、NetworkPTS Private Termination System functional groupingRC Reference ConfigurationRP Reference PointSW SWitching functional groupingTE Terminal Equipment functional grouping- 2 -5 DefinitionsFor the purposes of this Standard, the following definitions apply:5.1 Reference ConfigurationA conceptual c
26、onfiguration showing functional arrangements within a public ISDN, a PISN or between apublic ISDN and a PISN. Reference configurations are based on association rules of functional groupingsand reference points. A functional arrangement may, but need not, be equivalent to a physical arrangementof uni
27、ts of equipment.5.2 Functional groupingA set of functions needed in functional arrangements. A functional grouping may, but need not, beequivalent to a unit of equipment. Depending on the actual implementation, some of the functions of afunctional grouping may or may not be present.5.3 Reference Poi
28、nt (RP)A conceptual point at the junction of two functional groupings. In a specific functional arrangement, areference point may, but need not, correspond to a physical interface between units of equipment.5.4 Private Integrated Services Network (PISN)A private network providing services to a speci
29、fic set of users (different from a public network whichprovides services to the general public).NOTE 1This definition does not include legal and regulatory aspects and does not indicate any aspects ofownership.NOTE 2The term “PISN “ covers more than a (private) ISDN.5.5 Private Integrated Services N
30、etwork Exchange (PINX)A PISN nodal entity which provides automatic connection handling functions used for the provision oftelecommunication services . A nodal entity consists of one or more nodes.NOTEIf applicable, a PINX provides:G01 telecommunication services within its own area, and/orG01 telecom
31、munication services from the public ISDN, and/orG01 telecommunication services from other public networks, and/orG01 within the context of a private integrated services network, telecommunication services from otherPINXsto users of the same and/or other PINXs.A PINX can be presented by an ISPBX, ISC
32、TX (CENTREX), or other equipment performing the functionsoutlined above (e.g. LAN interworking unit).5.6 Inter-PINX Connection (IPC)A connection between two PINXs; the inter-PINX connection is provided by an intervening network. Itcan be established on-demand or permanently, depending on the nature
33、of the intervening network and, ifapplicable, customers requirements.5.7 Intervening Network (IVN)The generic term for any real type of network which is employed for the provision of inter-PINXconnections.- 3 -6 PINX Reference ConfigurationThe reference configuration is depicted within the dotted re
34、ctangle in figure 1 and contains the followingfunctional groupings:NOTEThe definition of specific information flows across RPs is outside the scope of this Standard.6.1 Terminal Equipment (TE)The TE functional grouping shall conform to the TE functional grouping as defined in ITU-T Rec. I.411.The TE
35、 can be either a TE1 functional grouping or a combination of a TE2 and a TA functional grouping.6.2 Private Termination System functional grouping (PTS)This functional grouping provides transmission functions and, if applicable, Layer 1 signalling functionsbetween the TE and the SW, as well as adapt
36、ation functions to the physical, electrical and proceduralconditions of the interface employed at the point of attachment of a TE to the PINX, to those employed atthe SW.6.3 Switching functional grouping (SW)This functional grouping provides the switching functions for user and signalling informatio
37、n. Userinformation is switched between PTS and MP (see 5.4) or PIAT (see 5.5), depending on the selection ofthe switching path. Signalling information is switched between PTS and CC (see 5.7), and CC and MPand/or PIAT, depending on the selection of the switching path. The selection of the switching
38、path de-pends on the parameters of the service request.6.4 Mapping functional grouping (MP)This functional grouping shall provide the functions which are necessary to adapt to physical, electricaland procedural conditions of the interface employed at the interface between the PINX and the IVN tothos
39、e employed at the SW. MP also provides the multiplexing functions which are required to separate ormerge the information flows to or from SW from or to the user plane of the IVN, and to or from IAC fromor to the control plane of the IVN, respectively.6.5 Public ISDN Access Termination functional gro
40、uping (PIAT)This functional grouping provides the functions which are necessary to adapt the physical, electrical andprocedural conditions employed at the interface between the PINX and the public ISDN to those employedat SW.6.6 Inter-PINX Connection Control functional grouping (ICC)This functional
41、grouping provides the signalling and control handling functions which are necessary tocontrol the inter-PINX connection (IPC) through the intervening network.6.7 Call Control functional grouping (CC)This functional grouping provides the functions which are necessary to control the call and the conne
42、ctionthrough a public ISDN and/or a PISN, and/or between the TEs attached to SW via PTS.6.8 Scenario managementThis functional grouping provides the information on the type of intervening network to MP as requiredfor the application of the appropriate control functions to the intervening network, vi
43、a SW. Managementfunctions and information flows between interconnected PINXs are handled by this functional grouping.- 4 -7 Reference points (RP)Letters have been allocated to those RPs at which interface and/or protocol definitions can be standardized.TESWPTSMPICCCCScenario ManagementPIATIVNpublic
44、ISDNsymmetricalarrangementNOTE - The allocation of PTS to the PINX, to the PINXs network, or to the TE depends on the physicalimplementation and is not defined by this standard.SQCTFigure 1 - PINX reference configuration7.1 C reference pointThe C RP defines the boundary between MP and intervening ne
45、twork. The physical, electrical and pro-cedural interface characteristics shall be specified at this RP, as well as the signalling information flowswhich are necessary for the control of the inter-PINX connections provided by the IVN.In the case where the IVN is a public ISDN, the interface specific
46、ations of the T RP shall apply at the CRP.7.2 Q reference pointThe Q RP defines the boundary between SW and MP. The inter-PINX call control functions and signallinginformation flows shall be specified at this RP.7.3 S reference pointThe S RP defines the boundary between the TE and the PINX functiona
47、l groupings. It forms the accesspoint of the TE to the PINX capabilities (see ITU-T Rec.).7.4 T reference pointThe T RP defines the boundary between the functional groupings of the PINX and those of the publicISDN. The physical, electrical and procedural interface characteristics shall be specified
48、at this RP, aswell as the interworking functions and control information between the public ISDN and the PISN.8 Use of the PINX Reference ConfigurationThe PINX reference configuration is an abstract way of defining reference points. This clause gives somerefined tools which allow the reference confi
49、guration to be applied to real implementations.An example of the combined use of these tools is given in annex C.An example showing the applicability of the PINX reference points to a PISN is given in annex D.8.1 Multiple instances of Q reference pointIf a PINX has multiple groups of inter-PINX connections, each leading to a different peer PINX, multipleinstances of Q reference points will occur. These may be distinguished by appropriate indexes, e.g. Q1 .Qx. This is shown in figure 2.- 5 -NOTEThere is no relationship between the number of instances of Q reference points and the num
