1、Standard ECMA-1753rd 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) -Specification, Functional Model andInformation Flows -Path Rep
2、lacement Additional NetworkFeature.Standard ECMA-1753rd 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-175.doc 06-01-99 14,20Private Integrated Services Network(PISN
3、) -Specification, Functional Model andInformation Flows -Path Replacement Additional NetworkFeature(ANF-PRSD).Brief HistoryThis Standard is one of a series of ECMA Standards defining services and signalling protocols applicable to Private IntegratedServices Networks (PISNs). The series uses ISDN con
4、cepts as developed by ITU-T and conforms to the framework ofInternational Standards for Open Systems Interconnection as defined by ISO/IEC. It has been produced under ETSI work itemDE/ECMA-00014.This particular Standard specifies the Path Replacement additional network feature.This Standard is based
5、 upon the practical experience of ECMA member companies and the results of their active andcontinuous participation in the work of ISO/IEC JTC1, ITU-T, ETSI and other international and national standardizationbodies. It represents a pragmatic and widely based consensus.This ECMA Standard is technica
6、lly aligned with the 2nd Edition International Standard ISO/IEC 13863:1998(E) published byISO/IEC in December 1998.Adopted as 3rd Edition of Standard ECMA-175 by the General Assembly of December 1998.- i -Table of contents1 Scope 12 Conformance 13 References (normative) 14 Definitions 24.1 External
7、definitions 24.2 Other definitions 24.2.1 Additional network feature 24.2.2 ANF-PR user 24.2.3 Call, basic call 24.2.4 Connection 24.2.5 New connection 34.2.6 Old connection 34.2.7 Trombone connection 35 List of acronyms 36 ANF-PR stage 1 specification 36.1 Description 36.1.1 General description 36.
8、1.2 Qualifications on applicability to telecommunication services 36.2 Procedures 46.2.1 Provision/withdrawal 46.2.2 Normal procedures 46.2.3 Exceptional procedures 46.3 Interaction with other supplementary services and ANFs 46.3.1 Calling Line Identification Presentation (SS-CLIP) 46.3.2 Connected
9、Line Identification Presentation (SS-COLP) 56.3.3 Calling/connected Line Identification Restriction (SS-CLIR) 56.3.4 Calling Name Identification Presentation (SS-CNIP) 56.3.5 Connected Name Identification Presentation (SS-CONP) 56.3.6 Calling/connected Name Identification Restriction (SS-CNIR) 56.3.
10、7 Completion of Calls to Busy Subscriber (SS-CCBS) 56.3.8 Completion of Calls on No Reply (SS-CCNR) 56.3.9 Call Transfer (SS-CT) 56.3.10 Call Forwarding Unconditional (SS-CFU) 56.3.11 Call Forwarding Busy (SS-CFB) 56.3.12 Call Forwarding No Reply (SS-CFNR) 56.3.13 Call Deflection (SS-CD) 56.4 Interw
11、orking considerations 56.5 Overall SDL 6- ii -7 ANF-PR stage 2 specification - basic operation 77.1 Functional model 77.1.1 Functional model description 77.1.2 Description of the functional entities 77.1.3 Relationship of functional model to basic call functional model 77.2 Information flows 87.2.1
12、Definition of information flows 87.2.2 Relationship of information flows to basic call information flows 97.2.3 Examples of information flow sequences 97.3 Functional entity actions 127.3.1 Functional entity actions of FE1 127.3.2 Functional entity actions of FE2 127.4 Functional entity behaviour 12
13、7.4.1 Behaviour of FE1 137.4.2 Behaviour of FE2 147.5 Allocation of functional entities to physical equipment 157.6 Interworking considerations 158 ANF-PR stage 2 specification - re-use of connection elements 158.1 Functional model 158.1.1 Functional model description 158.1.2 Description of the func
14、tional entities 168.1.3 Relationship of functional model to basic call functional model 168.2 Information flows 178.2.1 Definition of information flows 178.2.2 Relationship of information flows to basic call information flows 178.2.3 Examples of information flow sequences 178.3 Functional entity act
15、ions 218.3.1 Functional entity actions of FE1 218.3.2 Functional entity actions of FE2 218.3.3 Functional entity actions of FE3 218.4 Functional entity behaviour 218.4.1 Behaviour of FE1 218.4.2 Enhanced behaviour of FE2 228.4.3 Behaviour of FE3 238.5 Allocation of functional entities to physical eq
16、uipment 248.6 Interworking considerations 249 ANF-PR stage 2 specification - basic operation with inviting entity 249.1 Functional model 249.1.1 Functional model description 249.1.2 Description of the functional entities 249.1.3 Relationship of functional model to basic call functional model 249.2 I
17、nformation flows 25- iii -9.2.1 Definition of information flows 259.2.2 Relationship of information flows to basic call information flows 269.2.3 Examples of information flow sequences 269.3 Functional entity actions 309.3.1 Functional entity actions of FE1 309.3.2 Functional entity actions of FE2 3
18、09.3.3 Functional entity actions of FE4 309.4 Functional entity behaviour 309.4.1 Behaviour of FE1 319.4.2 Behaviour of FE2 329.4.3 Behaviour of FE4 329.5 Allocation of functional entities to physical equipment 329.6 Interworking considerations 33Annex A - Circumstances in which ANF-PR might be invo
19、ked 35Annex B - Avoidance of unacceptable disruption to user information 37- iv -.1ScopeThis Standard specifies the Path Replacement additional network feature (ANF-PR), which is applicable to variousbasic services supported by Private Integrated Services Networks (PISN). Basic services are specifie
20、d in ECMA-142.ANF-PR is a feature which applies to an established call, allowing that calls connection between Private IntegratedServices Network Exchanges (PINXs) to be replaced by a new connection. If the new connection is required to satisfycertain criteria, ANF-PR should be used in conjunction w
21、ith other supplementary services and/or ANFs. Annex Agives examples of the circumstances under which ANF-PR can be used and criteria which can govern the selection ofthe new connection.Additional network feature specifications are produced in three stages, according to the method described inETS 300
22、 387 for supplementary services. This Standard contains the stage 1 and stage 2 specifications of ANF-PR.The stage 1 specification (clause 6) specifies the feature as seen by an entity which initiates path replacement, theANF-PR user. The stage 2 specification (clauses 7, 8 and 9) identifies the fun
23、ctional entities involved in the feature andthe information flows between them. Clause 7 contains the stage 2 specification for basic operation of the feature.Clause 8 contains the stage 2 specification for an enhanced mode of working which can be employed when supportedby all the equipment involved
24、. It allows some of the elements of the old connection to be re-used. Clause 9 contains thestage 2 specification for an optional enhancement of the basic operation of the feature. It allows the ANF-PR user to belocated in any PINX in the old connection and to decide the direction of the new connecti
25、on.2 ConformanceIn order to conform to this Standard, a stage 3 standard shall specify signalling protocols and equipment behaviour thatare capable of being used in a PISN which supports the feature specified in this Standard. This means that, to claimconformance, a stage 3 standard is required to b
26、e adequate for the support of those aspects of clause 6 (stage 1) andclauses 7, 8 and 9 (stage 2) which are relevant to the interface or equipment to which the stage 3 standard applies.3 References (normative)The following standards contain provisions which, through reference in this text, constitut
27、e provisions of this Standard.All standards are subject to revision, and parties to agreements based on this Standard are encouraged to investigate thepossibility of applying the most recent editions of the standards indicated below.In the case of references to ECMA Standards that are aligned with I
28、SO/IEC International Standards, the number of theappropriate ISO/IEC International Standard is given in brackets after the ECMA reference.ECMA-133 Private Integrated Services Network - Reference Configuration for PISN Exchanges (PINX)(International Standard ISO/IEC 11579-1)ECMA-142 Private Integrate
29、d Services Network - Circuit-mode 64 kbit/s Bearer Services - ServiceDescription, Functional Capabilities and Information Flows (International StandardISO/IEC 11574)ISO/IEC 11571 Information Technology - Telecommunication and information exchange between systemsNumbering and sub addressing in Privat
30、e Integrated Services NetworkETS 300 387 Private Telecommunication Network (PTN); Method for the specification of basic andsupplementary services (1994)ITU-T Rec. I.112 Vocabulary of terms for ISDNs (1993)ITU-T Rec. I.210 Principles of telecommunication services supported by an ISDN and the means to
31、 describe them(1993)ITU-T Rec. Z.100 Specification and description language (1993)- 2 -4 DefinitionsFor the purposes of this Standard, the following definitions apply.4.1 External definitionsDefinitionsThis Standard uses the following terms defined in other documents:G01 Basic service (ITU-T Rec. I.
32、210)G01 Private Integrated Services Network (PISN) (ECMA-133)G01 Private Integrated Services Network Exchange (PINX) (ECMA-133)G01 Service (ITU-T Rec. I.112)G01 Signalling (ITU-T Rec. I.112)G01 Supplementary Service (ITU-T Rec. I.210)G01 User (except in the context of ANF-PR user) (ECMA-142)This Sta
33、ndard refers to the following basic call functional entities (FEs) defined in ECMA-142:G01 Call Control (CC)G01 Call Control Agent (CCA)This Standard refers to the following basic call inter-FE relationships defined in ECMA-142:G01 r1G01 r2G01 r3This Standard refers to the following basic call infor
34、mation flows defined in ECMA-142:G01 CHANNEL_ACKNOWLEDGE request/indicationG01 RELEASE request/indicationG01 RELEASE response/confirmationG01 SETUP request/indicationG01 SETUP response/confirmation.This Standard refers to the following basic call information flow service element defined in ECMA-142:
35、G01 Destination Number.4.2 Other definitions4.2.1 Additional network featureAn additional network feature (ANF) is a capability, over and above that of a basic service, provided by a PISN,but not directly to a PISN user.4.2.2 ANF-PR userAn entity, within a PISN, that requests ANF-PR.4.2.3 Call, basi
36、c callAn instance of the use of a basic service.4.2.4 ConnectionAs defined in ITU-T Rec. I.112, but limited to the case of providing for the transfer of signals between twoPINXs.- 3 -NOTE 1A connection between two PINXs can pass through zero or more Transit PINXs.4.2.5 New connectionThe connection e
37、stablished by ANF-PR and used to replace all or part of the old connection.4.2.6 Old connectionThe connection existing before ANF-PR is invoked.4.2.7 Trombone connectionA connection which has both its ends in the same PINX but which involves at least one Transit PINX.5 List of acronymsANF Additional
38、 Network FeatureANF-PR ANF Path ReplacementCC Call Control (functional entity)CCA Call Control Agent (functional entity)CID Call Identity (information flow service element)FE Functional EntityISDN Integrated Services Digital NetworkPINX Private Integrated Services Network ExchangePISN Private Integr
39、ated Services NetworkPRE Path Replacement Error (information flow)PRI Path Replacement Invite (information flow)PRP Path Replacement Propose (information flow)PRR Path Replacement Re-use (information flow)PRRR PRR Result (information flow service element)PRS Path Replacement Setup (information flow)
40、PRSR PRS Result (information flow service element)RN Rerouteing Number (information flow service element)SDL Specification and Description Language6 ANF-PR stage 1 specification6.1 Description6.1.1 General descriptionANF-PR is invoked by an ANF-PR user for an established call, allowing that calls co
41、nnection through the PISNto be replaced by a new connection. The direction of the new connection may be decided by the ANF-PR user. Ifthe new connection is required to satisfy certain criteria, ANF-PR should be used in conjunction with othersupplementary services and/or ANFs. Annex A gives examples
42、of the circumstances under which ANF-PR can beused and criteria which can govern the selection of the new connection.6.1.2 Qualifications on applicability to telecommunication servicesThis additional network feature is applicable to all basic services defined in ECMA-142.- 4 -NOTE 2For certain teles
43、ervices or certain applications of certain basic bearer services the changeover from the oldconnection to the new connection can cause unacceptable disruption. See annex B.6.2 Procedures6.2.1 Provision/withdrawalThis ANF shall be PISN instigated.NOTE 3Means can be provided for preventing the use of
44、ANF-PR for applications where the changeover from the oldconnection to the new connection is likely to cause unacceptable disruption. See annex B.6.2.2 Normal procedures6.2.2.1 Activation/deactivation/registration/interrogationThe feature shall be permanently activated.6.2.2.2 Invocation and operati
45、onInvocation shall be on request from an ANF-PR user and shall be permitted only after a call has reached theactive state. As an implementation option, the ANF-PR user may indicate the direction of the new connection.On invocation an attempt shall be made to establish a new connection between the us
46、ers. In the absence ofspecific criteria, the new connection shall be established using the routeing rules which apply to basic callestablishment. If the new connection is successfully established it shall be used to replace the old connection,which shall be released.Changeover from the old connectio
47、n to the new connection should be done in a manner which minimisesdisruption to user information.NOTE 4The means of specifying criteria and ensuring that the new connection satisfies those criteria can involve theuse of another ANF or supplementary service, which can be either standardized or manufa
48、cturer specific.In some circumstances it may be possible to re-use some elements of the old connection, so that only part ofthe old connection has to be replaced by a new connection, subject to the given criteria being achievable inthat way.6.2.3 Exceptional procedures6.2.3.1 Activation/deactivation
49、/registration/interrogationNot applicable.6.2.3.2 Invocation and operationIf it is not possible to establish a new connection, the call shall continue to use the old connection and anyresources reserved for the new connection shall be released. There shall be no disruption to user information.In the event of two ANF-users (at opposite ends of the connection) requesting the feature simultaneously, bothrequests shall be rejected.NOTE 5An ANF-PR user can request the feature again later in the event of failure. In the case of failure due tosimultaneous requests, care should be taken to
