ETSI ETS 300 200-1994 Integrated Services Digital Network (ISDN) Call Forwarding Unconditional (CFU) Supplementary Service Service Description《综合业务数字网(ISDN) 无条件呼叫前转(CFU)补充业务 业务描述》.pdf

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1、ETSI ETS*300*200 94 3400855 0003520 963 - ETSI ETS 300 200 December 1994 Source: ETSI TC-NA Reference: DE/NA-O12205 UDC: 621.395 Key words: ISDN, supplementary service Integrated Services Digital Network (ISDN); Call Forwarding Unconditional (CFU) supplementary service Service description ETSI Europ

2、ean Telecommunications Standards Institute ETSI Secretariat Postal address: 06921 Sophia Antipolis Cedex - FRANCE Office address: Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE Tel.: + 33 92 94 42 O0 - Fax: + 33 93 65 47 16 - Tlx: 470 040 F European Telecommunications Standards Institute

3、1 994. All rights reserved. No part may be reproduced or used except as authorised by contract or other written permission. The copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied. - ETSI ETS*300*200 74 m 3400855 0003523 BTT m

4、Page 2 ETS 300 200: December 1994 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to “ETSI Editing and Standards Approval Dept.“ at the address s

5、hown on the title I I . ETSI ETS*300*200 94 3400855 0003522 736 Page 3 ETS 300 200: December 1994 Contents Foreword . 5 1 Scope . 7 2 Normative references 7 3 Definitions . 8 4 Symbols and abbreviations . 9 5 Description 9 6 Procedures . 9 6.1 Provision and withdrawal 9 6.2 Normal procedures . 10 Ac

6、tivation, deactivation and registration . 10 6.2.1.1 Activation . 10 6.2.1.2 Deactivation 11 6.2.1.3 Registration . 12 6.2.2 Erasure 12 6.2.3 Invocation and operation 12 Served users view . 12 Forwarded-to users view 13 Calling users view . 13 6.2.4 Interrogation . 14 6.3 Exceptional procedures . 15

7、 Activation, deactivation and registration . 15 6.3.1.2 Deactivation 16 6.3.1.3 Registration . 16 6.3.2 Erasure 16 6.3.3 Invocation and operation 17 6.3.4 Interrogation . 17 6.2.1 6.2.3.1 6.2.3.2 6.2.3.3 6.3.1 6.3.1 . 1 Activation . 15 7 Intercommunication considerations 17 Interworking with non-ISD

8、Ns . 18 Interworking with private ISDN 18 7.1 7.2 8 Interaction with other supplementary services . 18 Advice of charge services 18 8.1 8.1.1 8.1.2 8.1.3 Charging information at call Set-up time 18 Charging information during the call . 19 Charging information at the end of the call 19 8.2 Call wait

9、ing . 19 8.3 Call hold . 19 8.4 Explicit call transfer 19 8.5 Number identification services 19 8.5.1 Calling line identification presentation . 19 8.5.2 Calling line identification restriction 19 8.5.3 Connected line identification presentation . 20 8.5.4 Connected line identification restriction 2

10、0 Closed user group 20 Completion of calls to busy subscribers . 20 8.6 8.7 8.8 Conference services . 21 ETSI ETS*300*200 94 3400855 0003523 672 a Page 4 ETS 300 200: December 1994 8.9 8.10 8.1 1 8.12 8.13 8.14 8.15 8.1 6 8.17 8.8.1 Conference call. add-on 21 8.8.2 Meet-me conference . 21 Direct dia

11、lling in . 21 Diversion services . 21 8.10.1 Call forwarding unconditional 21 8.10.2 Call forwarding busy 21 8.1 0.3 Call forwarding no reply 21 8.1 0.4 Call deflection . 21 Freephone . 22 Malicious call identification 22 Multiple subscriber number 22 Subaddressing . 22 Terminal portability . 22 Use

12、r-to-user signalling . 23 Three party 22 History . 24 ETSI ETS*300*200 94 3400855 0003524 507 D Page 5 ETS 300 200: December 1994 Foreword This European Telecommunication Standard (ETSI has been produced by the Network Aspects (NA) Technical Committee of the European Telecommunications Standards Ins

13、titute (ETSI). In accordance with CCITT Recommendation 1.1 30 I I, the following three level structure is used to describe the supplementary telecommunications services as provided by European public telecommunications operators under the pan-European Integrated Services Digital Network (ISDN): - St

14、age 1 : is an overall service description, from the users standpoint; - Stage 2: identifies the functional capabilities and information flows needed to support the service described in stage 1 ; and - Stage 3: defines the signalling system protocols and switching functions needed to implement the se

15、rvice described in stage 1. This ETS details the stage 1 aspects (overall service description) for the Call Forwarding Unconditional (CFU) supplementary service. The stage 2 and stage 3 aspects are detailed in ETS 300 204 (1994) and ETS 300 207 (19941, respectively. Transposition dates Date of lates

16、t announcement of this ETS (doal: Date of latest publication of new National Standard or endorsement of this ETS (dop/el: Date of withdrawal of any conflicting National Standard (dow): 31 March 1995 I 30 September 1995 30 September 1995 ETSI ETS*300*200 94 = 3400855 0003525 445 Page 7 ETS 300 200: D

17、ecember 1994 1 Scope This standard defines the stage one of the Call Forwarding Unconditional (CFU) supplementary service for the Pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators. Stage one is an overall service description from the

18、users point of view, but does not deal with the details of the human interface itself (see CCITT Recommendation I. 130 I I). This standard defines the interworking requirements of private ISDNs with the public ISDN. In addition this standard specifies the base functionality where the service is prov

19、ided to the user via a private ISDN. This standard does not specify the additional requirements where the service is provided to the user via a telecommunications network that is not an ISDN but does include interworking requirements of other networks with the public ISDN. Charging principles are ou

20、tside the scope of this standard. Interaction with supplementary services not listed in clause 8 are outside the scope of this standard. The CFU supplementary service enables a served user to have the network redirect to another user calls which are addressed to the served users ISDN number. The CFU

21、 supplementary service may operate on all calls, or just those associated with specified basic services. The served users ability to originate calls is unaffected by the CFU supplementary service. After the CFU supplementary service has been activated, calls are forwarded independent of to the statu

22、s of the served user. The CFU supplementary service is applicable to all circuit-switched telecommunication services. This standard is applicable to the stage two and stage three standards for the ISDN CFU supplementary service. The terms “stage two“ and “stage three“ are also defined in CCITT Recom

23、mendation 1.130 Il. Where the text indicates the status of a requirement (.e. as strict command or prohibition, as authorization leaving freedom, as a capability or possibility), this shall be reflected in the text of the relevant stage two and stage three standards. Furthermore, conformance to this

24、 standard is met by conforming to the stage three standards with the field of application appropriate to the equipment being implemented. Therefore, no method of testing is provided for this standard. 2 Normative references This standard incorporates, by dated or undated reference, provisions from o

25、ther publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to, or revisions of, any of these publications apply to this standard only when incorporated in it by amendment or revi

26、sion. For undated references the latest edition of the publication referred to applies. 21 i31 41 CCITT Recommendation 1.1 30 (1 988): “Method for the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN“. CCITT Recommendation 1.1 12 (1 988): “Vocab

27、ulary of terms for ISDNs“. CCITT Recommendation E. 164 (1 991 1: “Numbering plan for the ISDN era“. CCITT Recommendation 1.21 O (1 988): “Principles of telecommunication services supported by an ISDN and the means to describe them“. Previous page is blank Page 8 ETS 300 200: December 1994 51 CCITT R

28、ecommendation Q.9 (1 988): “Vocabulary of switching and signalling terms“. 3 Definitions For the purposes of this standard, the following definitions apply: Integrated Services Digital Network (ISDN): See CCITT Recommendation 1.1 12 21, 2.3, definition 308. (basic) service; telecommunication service

29、: See CCITT Recommendation 1.1 12 21, 2.2, definition 201. user A: The calling user in a call which is subject to diversion. user B: The served user when a call (from user A) is subject to the CFU supplementary service. NOTE: In the context of multiple diversions, a suffix is used, e.g. 1, 2, . n, n

30、 + 1, . m, to denote the successive diverting users. For example, user B3 is also the diverted-to user with respect to the diversion applied at user B2. user C: The forwarded-to user in a call which is subject to the CFU supplementary service. In the case of a call which is subject to multiple diver

31、sions, user C is the forwarded-to user with respect to the final call forwarding. diverted-to user: A user to whom a call is redirected as a result of diversion. supplementary service: See CCITT Recommendation 1.21 O 41, 2.4. ISDN number: A number conforming to the numbering plan and structure speci

32、fied in CCITT Recommendation E.164 31. basic access: See CCITT Recommendation 0.9 51, 1, definition 1551. primary rate access: See CCITT Recommendation Q.9 i51, 1, definition 1552. address: see CCITT Recommendation E. 164 31, 12. subaddress: See CCITT Recommendation E. 164 31, 12.2. served user: The

33、 user to whom the CFU supplementary service is provided forwarded-to user: A user to whom the call is redirected as a result of forwarding. (call) forwarding: A general term applied to any functionality whereby a call is redirected automatically by the service provider to another user. The forms of

34、forwarding are: unconditional, whereby all calls are redirected; busy, whereby calls encountering busy are redirected; and, no reply, whereby calls which are not answered within a time period are redirected. diversion: A general term which includes all forms of forwarding, and includes deflection wh

35、ereby calls are redirected by the user instead of being answered. basic call procedures: The procedures by which a call (as an instance of a basic telecommunication service) is established and terminated. diverting user: A user for whom the call is subjected to diversion. ETSI ETS*300*200 94 3400855

36、 O003527 218 Page 9 ETS 300 200: December 1994 4 Symbols and abbreviations CFU Call Forwarding Unconditional ISDN Integrated Services Digital Network PSTN Public Switched Telephone Network 5 Description The CFU supplementary service shall be available to users who are connected to the network via a

37、basic access or a primary rate access. The CFU supplementary service enables a served user to have the network redirect to another user calls which are addressed to the served users ISDN number. The CFU supplementary service may operate on all calls, or just those associated with specified basic ser

38、vices. The served users ability to originate calls is unaffected by the CFU supplementary service. After the CFU supplementary service has been activated, calls are forwarded independent of the status of the served user. As a service provider option, a subscription option can be provided to enable t

39、he served user to receive an indication that the CFU supplementary service has been activated. This indication shall be provided when the served user originates a call if the CFU supplementary service has been activated for the served users ISDN number and for the basic service requested for the cal

40、l. The maximum number of diversions permitted for each call is a service provider option with an upper limit of five diversions. When counting the number of diversions, all types of diversion are included. 6 Procedures 6.1 Provision and withdrawal The CFU supplementary service shall be provided afte

41、r prior arrangement with the service provider. As a service provider option, the CFU supplementary service can be provided on a per ISDN number basis, or the CFU supplementary service can apply to the whole access. If a service provider offers both of these options, then it shall be a subscription o

42、ption to choose which of these options applies. In addition, the CFU supplementary service (including options) can be subscribed to for all basic services subscribed to by the user, or as a service provider option, the user can identify particular basic serviceb) for which the CFU supplementary serv

43、ice shall apply. As a service provider option, the service can be offered with one or more of four subscription options, which can apply separately to each basic service subscribed to. If the CFU supplementary service is provided on a per ISDN number basis, then these options can apply separately to

44、 each ISDN number. For each subscription option, only one value can be selected. Subscription options are summarized in table 1. ETSI ETS*300*200 94 3400855 0003528 154 Served user receives notification that the call has been forwarded Page 10 ETS 300 200: December 1994 - no - yes Table 1 I Subscrip

45、tion option I Value Calling user receives notification that the call has been forwarded I Served user receives notificatio that the CFU supplementary service is currently activated - no - yes, without the ISDN number of the forwarded-to user number of the forwarded-to user - yes, with the ISDN - no

46、- yes The served users ISDN number can be presented to the forwarded-to user - no - yes As a service provider option, a subscription option can be offered to served users, to enable the CFU supplementary service to be activated, deactivated and interrogated for all ISDN numbers on the same access. I

47、SDN numbers for which the CFU supplementary service is not subscribed to shall not be affected. The CFU supplementary service shall be withdrawn by the service provider upon request of the subscriber or for service provider reasons. 6.2 Normal procedures 6.2.1 Activation, deactivation and registrati

48、on 6.2.1.1 Activation The served user shall supply the following information when requesting the activation of the CFU supplementary service: - the ISDN number of the forwarded-to user, which can be accompanied by a subaddress for additional identification of the forwarded-to user; and - information

49、 as to whether the activation of the CFU supplementary service is for all basic services to which the CFU supplementary service applies, or for a specific basic service out of the basic services to which the CFU supplementary service applies. When subscription applies on a per ISDN number basis and more than one ISDN number is allocated to the access, then: - the served user shall also supply the ISDN number for which the activation of the CFU supplementary service shall apply, or; - as a service provider option, the served user can, if sub