1、National Standard of CanadaCAN/CSA-ISO/IEC 13242-01(ISO/IEC 13242:1997)International Standard ISO/IEC 13242:1997 (first edition, 1997-06-15), has been adopted withoutmodification as CSA Standard CAN/CSA-ISO/IEC 13242-01, which has been approved as a NationalStandard of Canada by the Standards Counci
2、l of Canada.ISBN 1-55324-327-7 February 2001The Canadian Standards Association, which The Standards Council of Canada is theoperates under the name CSA International coordinating body of the National Standards system, (CSA), under whose auspices this National Standard a federation of independent, au
3、tonomoushas been produced, was chartered in 1919 and organizations working towards the furtheraccredited by the Standards Council of Canada to the development and improvement of voluntaryNational Standards system in 1973. It is a not-for-profit, standardization in the national interest.nonstatutory,
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6、 the field of standards.standards are used widely by industry and commerce A National Standard of Canada is a standard whichand often adopted by municipal, provincial, and federal has been approved by the Standards Council ofgovernments in their regulations, particularly in the Canada and one which
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9、through sustaining memberships. The more which is capable of making a significant and timelythan 7000 committee volunteers and the 2000 contribution to the national interest.sustaining memberships together form CSAs total Approval of a standard as a National Standard ofmembership from which its Dire
10、ctors are chosen. Canada indicates that a standard conforms to theSustaining memberships represent a major source of criteria and procedures established by the Standardsincome for CSAs standards development activities. Council of Canada. Approval does not refer to theThe Association offers certifica
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12、regularly and Those who have a need to apply standards arecontinually audits and inspects products that bear the encouraged to use National Standards of CanadaCSA Mark. whenever practicable. These standards are subject In addition to its head office and laboratory complex to periodic review; therefo
13、re, users are cautioned in Toronto, CSA has regional branch offices in major to obtain the latest edition from the organizationcentres across Canada and inspection and testing preparing the standard.agencies in eight countries. Since 1919, the Association The responsibility for approving National St
14、andards has developed the necessary expertise to meet its of Canada rests with thecorporate mission: CSA is an independent service Standards Council of Canadaorganization whose mission is to provide an open and 270 Albert Street, Suite 200effective forum for activities facilitating the exchange of O
15、ttawa, Ontario, K1P 6N7goods and services through the use of standards, Canadacertification and related services to meet national andinternational needs.For further information on CSA services, write toCSA International178 Rexdale BoulevardToronto, Ontario, M9W 1R3CanadaAlthough the intended primary
16、 application of this Standard is stated in its Scope, it is importantto note that it remains the responsibility of the users to judge its suitability for their particular purpose.Registered trade-mark of Canadian Standards AssociationInformation technology Telecommunications and information exchange
17、 betweensystems Private Integrated Services Network Specification, functional modelCAN/CSA-ISO/IEC 13242-01 and information flows Route Restriction Class additional network featureFebruary 2001 CSA/1CAN/CSA-ISO/IEC 13242-01Information technology Telecommunications andinformation exchange betweensyst
18、ems Private IntegratedServices Network Specification,functional model and informationflows Route Restriction Classadditional network featureCSA PrefaceStandards development within the Information Technology sector is harmonized with internationalstandards development. Through the CSA Technical Commi
19、ttee on Information Technology (TCIT),Canadians serve as the Canadian Advisory Committee (CAC) on ISO/IEC Joint Technical Committee 1 onInformation Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO memberbody for Canada and sponsor of the Canadian National Committee of the
20、 IEC. Also, as a member of theInternational Telecommunication Union (ITU), Canada participates in the International Telegraph andTelephone Consultative Committee (ITU-T).This International Standard was reviewed by the CSA TCIT under the jurisdiction of the StrategicSteering Committee on Information
21、Technology and deemed acceptable for use in Canada. (Acommittee membership list is available on request from the CSA Project Manager.) From time to time,ISO/IEC may publish addenda, corrigenda, etc. The CSA TCIT will review these documents for approvaland publication. For a listing, refer to the CSA
22、 Information Products catalogue or CSA Info Update orcontact a CSA Sales representative. This Standard has been formally approved, without modification, bythese Committees and has been approved as a National Standard of Canada by the Standards Council ofCanada.February 2001 CSA International 2001All
23、 rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission ofthe publisher. ISO/IEC material is reprinted with permission. Inquiries regarding this National Standard of Canada shouldbe addressed to CSA International, 178 Rexdale Boulevard, Tor
24、onto, Ontario, M9W 1R3.INTERNATIONAL STANDARD Ii242 First edition 1997-06-I 5 Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and information flows - Route Restriction Class additional networ
25、k feature Technologies de I information - TMcommunica tions et Gchange dinformation entre systgmes - R or 0 one or more RAC values that are not entitled to use the facility. Some PISNs may treat RAC values as levels, whereby each RAC value other than the lowest numbered RAC value is entitled to use
26、all facilities that the value below can use, plus some specific additional facilities. Any PINX implementation shall be capable of providing ANF-RRC in this way and some PINX implementations may be capable of providing ANF-RRC only in this way (see annex A). ISO/IEC 13242:1997(E) OISO/IEC 6.2.2 Norm
27、al procedures 6.2.2.1 Activation/Deactivation/Registration/Interrogation ANF-RRC shall be permanently activated. No information needs to be registered within the PISN for this ANF, and therefore interrogation is not applicable. 6.2.2.2 Invocation and operation An RAC shall be associated with each ca
28、ll in accordance with the calls source. A call shall not use a facility that is controlled by ANF-RRC if, according to that facilitys FRC, the calls RAC value is not entitled to use that facility. NOTE - A call that cannot be progressed because its RAC value does not allow it to access facilities ne
29、eded for routeing can be released in accordance with ISO/IEC 11574. Other possible actions in this situation are outside the scope of this International Standard. 6.2.3 Exceptional procedures 6.2.3.1 Activation/Deactivation/Registration/Interrogation Not applicable. 6.2.3.2 Invocation and operation
30、Not applicable. 6.3 Interaction with other Supplementary Services and ANFs Interactions with other supplementary services and ANFs for which PISN Standards were available at the time of publication of this International Standard are specified below. 6.3.1 Calling Line Identification Presentation (SS
31、-CLIP) No interaction. 6.3.2 Connected Line Identification Presentation (SS-COLP) No interaction. 6.3.3 Calling/connected Line Identification Restriction (SS-CLIR) No interaction. 6.3.4 Calling Name Identification Presentation (SS-CNIP) No interaction. 6.3.5 Connected Name Identification Presentatio
32、n (SS-CONP) No interaction. 6.3.6 Calling/connected Name Identification Restriction (SS-CNIR) No interaction. 6.3.7 Completion of Calls to Busy Subscriber (SS-CCBS) No interaction. OISO/IEC ISO/IEC 13242: 1997(E) 6.3.8 Completion of Calls on No Reply (SS-CCNR) No interaction. 6.3.9 Call Transfer (SS
33、-CT) No interaction. 6.3.10 Call Forwarding Unconditional (SS-CFU) ANF-RRC can be used in the forwarding of a call as follows. The diverted call may use either the RAC associated with the calling user or the RAC associated with the diverting user. 6.3.11 Call Forwarding Busy (SS-CFB) As for SS-CFU (
34、6.3.10). 6.3.12 Call Forwarding No Reply (SS-CFNR) As for SS-CFU (6.3.10). 6.3.13 Call Deflection (SS-CD) As for SS-CFU (6.3.10). 6.3.14 Path Replacement (ANF-PR) An RAC shall be associated with the new connection in accordance with the calls source. The new connection shall not use a facility that
35、is controlled by ANF-RRC if, according to that facilitys FRC, the calls RAC value is not entitled to use that facility. 6.3.15 Call Offer (SS-CO) No interaction. 6.3.16 Call Intrusion (SS-CI) No interaction. 6.3.17 Do Not Disturb (SS-DND) No interaction. 6.3.18 Do Not Disturb Override (SS-DNDO) No i
36、nteraction. 6.4 Interworking considerations An RAC shall be associated with each incoming call from another network. This can either be a value supplied by the other network that supports an equivalent feature or a value assigned to the gateway. The ability to establish an outgoing call to another n
37、etwork can be treated as a facility that is controlled by ANF-RRC. When establishing an outgoing call to another network, the PISN may supply the other network with the calls RAC value if the other network supports an equivalent feature. ISO/IEC 13242:1997(E) OISO/IEC 6.5 Overall SDL Figure 1 contai
38、ns the dynamic description of ANF-RRC using the Specification and Description Language (SDL) defined in CCITT Rec. Z. 100 (1988). The SDL process represents the behaviour of the PISN in providing ANF-RRC. Input signals from the left represent primitives from the entity which invokes ANF-RRC to the e
39、ntity which receives and acts on the RAC. Determine RAC for call Able to route that can be used with this RAC Unable to route that can be used with this RAC Allow call to proceed Abort call Figure l- ANF-RRC, Overall SDL 7 ANF-RRC stage 2 specification 7.1 Functional model 7.1.1 Functional model des
40、cription The functional model shall comprise the following functional entities: FE1 RRC Initiate FE2 RRC Execute 6 OISO/IEC ISO/IEC 13242:1997(E) The following functional relationship shall exist between these Fes: ra between FE1 and FE2 and between consecutive FE2s Figure 2 shows these FEs and thei
41、r relationship. ra Figure 2 - Functional model for ANF-RRC 7.1.2 Description of functional entities 7.1.2.1 RRC initiate, FE1 This FE recognizes that a call is being established for which ANF-RRC is applicable and assigns an RAC to the call. It also checks that any facilities needed for the initial
42、routeing of the call are entitled to be used by a call with that RAC. If the call is allowed to proceed, it passes that RAC to the first FE2, if applicable. 7.1.2.2 RRC execute, FE2 At the time of call establishment, this FE receives an RAC from FE1 or the preceding FE2. It checks that any facilitie
43、s needed for further routeing of the call are entitled to be used by a call with that RAC. If the call is allowed to proceed, it passes the RAC to the subsequent FE2, if applicable. 7.1.3 Relationship of functional model to basic call functional model FE1 shall be collocated with the Originating CC,
44、 an Incoming Gateway CC, or a Transit CC. FE2 shall be collocated with the Terminating CC or Outgoing Gateway CC. In addition, an FE2 shall be collocated with each intermediate Transit CC. Figure 3 shows an example of the relationship with the basic call functional model. ra Origin. r2 , cc ra Trans
45、it r2 cc ra Transit r2 cc Termin. cc Figure 3 - Example relationship between models for ANF-RRC and basic call 7.2 Information flows 7.2.1 Definition of information flows In the tables listing the service elements in information flows, the column headed “Request” indicates which of these service ele
46、ments are mandatory (M) and which are optional (0) in a request/indication information flow. ISO/IEC 13242:1997(E) OISO/IEC 7.2.1.1 ra-RRC (Route Restriction Class) ra-RRC is an unconfirmed information flow across ra from FE1 to FE2 and between FE2s. Table 1 lists the service elements within the RRC
47、 information flow. Table l- Content of ra-RRC I- Service element 1 Request 1 RAC M Service element RAC shall always be included in the ra-RRC request/indication information flow. It shall contain an integer in the range (0 to 99). This number shall be used for comparison to FRCs of outgoing Faciliti
48、es at the next FE2. 7.2.2 Relationship of information flows to basic call information flows The RRC request/indication information flow shall be sent in conjunction with the basic call information flow r2-Setup request/indication for the new connection sent across basic call relationship r2. Service
49、 element RAC of information flow Setup request/indication shall contain the number corresponding to the RAC of the call. 7.2.3 Examples of information flow sequences A stage 3 Standard for ANF-RRC shall provide signalling procedures in support of the information flow sequences specified below. In addition, signalling procedures should be provided to cover other sequences arising from error situations, interactions with basic call, interactions with other supplementary services, different topologies, etc. In the figures, ANFRRC information flows are repres
