1、CCITT RECMN*I.255- 5 92 M 4862591 0574768 596 INTERNATIONAL TELECOMMUNICATION UNION CCITT ME INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE INTEGRATED SERVICES DIGITAL NElWORK (ISDN) GENERAL STRUCTURE AND SERVICE CAPABILITIES 1.255.5 (08/92) OUTGOING CALL BARRING Recommendation 1.255.5
2、 Geneva, 1992 CCITT RECMN*I-255* 5 92 m 486259L 05747b9 422 m INTERNATIONAL TELECOMMUNICATION UNION CCITT THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE INTEGRATED SERVICES DIGITAL NETWORK (ISDN) GENERAL STRUCTURE AND SERVICE CAPABILITIES 1.255.5 (08/92) OUTGOING CALL BARRING Recom
3、mendation 1.255.5 Geneva, 1992 CCITT RECMN*I-255. 5 92 4862591 0574770 144 - FOREWORD The CCi (the International Telegraph and Telephone Consultative Committee) is a permanent organ of the International Telecommunication Union o. CCT is respoasibie for studying teclmical, operatllig and tariff quest
4、ions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. ni td $he topics for study and approves Recommendations prepared by its Study Groups. The approval of Recommendations by the members of CCfIT between Plenary Assemblies is covered by the pr
5、ocedure hid down in CCl“ Resolutiop No. 2 (Melbourne, 1988). Recammendation 1.255.5 was prepared by Study hup I amb pvas appmd mder the Resolution No. 2 procedure on the 4th of August 1992. - users access. However, this service does not restrict the reception of incoming calls. barring of a special
6、group of cab (e.g. national or international calls). 2 Description 2.1 General description access subscribes, or collectively for all basic services to which the user subscribes. Outgoing Call Barring (OCB) service may be subscribed to for each basic service to which the user of the For each of the
7、basic services, the subscriber may request one of the versions as follows: a) General Outgoing Call Barring (GOCB) For one basic service ali originating calls, except some speciai numbers (e.g. police, fire brigade) are barred. Note - The service provider decides which numbers are not barred. Specia
8、l Outgoing Call Barring (SOCB) For one basic service all originating calls, belonging to a special group of calls (e.g. national calls or international calls) are barred. Note - The service provider may either offer a fixed set of barred numbers to all subscribers or an individual set of barred numb
9、ers may be agreed with each subscriber. b) 2.2 Specific terminology No specific terminology identified. 2.3 Qualflcations on the applicability to telecommunication services No restrictions identified. 3 Procedures 3.1 Provisiodwithdrawal OCB shall be provided after prearrangement with the service pr
10、ovider. A codeword is allocated by the service provider for each basic service and each subscriber. Upon subscribers request, a unique codeword may be allocated for all basic services at the subscriber access. Note - Different subscribers may obtain the same codeword independently. It is possible to
11、 obtain several versions of OCB in parallel for one basic service. Recommendation 1.255.5 (OS/%) 1 CCITT RECMN*I-255. 5 92 4862593 0574772 T37 l 3.2 Normal procedures i a: 1 $ I -es ;8 3.2.1 Aetivation/deacti.oation/tegistratw .:. . A user who has subscribed to OCB can use the activation procedure.
12、For the activation of one version of OCB for one basic service, the appropriate codeword has to be received by the local exchange of the subscriber. wen the user activates OCB the service providei +-rem of accephce or rejection of the request (compare exceptional procedures, 8 3.3.1.1, for possible
13、causes of rejection). For the deactivation of a previously activated OCB, the same codeword has to be received by the local exchange. When the user deactivates OCB, the service provider will return notification of acceptance or rejection of this request (compare exceptional procedures, 8 3.3.1.1, fo
14、r possible causes of rejection). 3.2.2 Invocation and operation When OCB is active, outgoing call attempts wili be examined by the local exchange. They will be processed further in and beyond the local exchange, if they are within the iimitatons f the version of OCB that has been activated. When a u
15、ser attempts to set up a ca to a destination which is band by the CB-version bat is currently active, the call Set-up will not be completed. The service provider may give a mtikatim of the activation of OCB m the user. 3.3 Exceptional procedures 3.3.1 Aetivatioddeactivatiodregistration 3.3.1.1 Activ
16、ation ? if the system cannot accept an activation request, tbe user should receive a tiotiftcation tbat*OCB activation was unsuccessful. Possible causes are: i) service not subscriW, ii) insufficient iufmtion; iii) unailocateddeword, : :r A certain number of activation attempts (e.g. 3) with an unai
17、iocated codewo temporary ignoration of further activation attempts (e.g. 30 minutes). d wult in a - iv) service already activated. in this case, treatment of consecutive attempts to activate OCE3 are a nem ii) insufficient information; iii) unallocated codeword; A certain number of deactivation atte
18、mpts (e.g. 3) with an unallocated codeword should result in a temporary ignoration of further deactivation attempts (e.g. 30 minutes). iv) service not activated. In this case, treatment of consecutive attempts to deactivate OCB are a network provider option. 3.3.2 Invocation und operation 3.3.2.1 Ac
19、tivation of a superior version of OCB In case of the activation of a superior version of OCB it is not necessary to deactivate the version which is currently active. It should be sufficient to insert the appropriae codeword for the superior version only. 3.3.2.2 Activation of un inferior version of
20、OCB In case of the activation of an inferior version of OCB it is not necessary to deactivate the version which is currently active. It should be sufficient to insert the appropriate codeword for the inferior version only. 3.4 Alternate procedures None identified. 4 Network capabilities for charging
21、 This Recommendation does not cover charging principles. Future Recommendations of the D-Series are expected to contain that information. It shall be possible to charge the customer accurately for this service. 5 Interworking requirements No interworking requirements exist. 6 Interaction with other
22、supplementary services 6.1 Cull Wuiting No impact, i.e. neither supplementary service affects the operation of the other supplementary service. 6.2 Cull Transfer No impact, i.e. neither supplementary service affects the operation of the other supplementary service. 6.3 Connected Line Identification
23、Presentution No impact, i.e. neither supplementary service affects the operation of the other supplementary service. I Recommendation 1.255.5 (08/92) 3 I CCITT RECMN*I.255- 5 92 4862591 0574774 89T 6.4 6.5 6.6 6.7 6.8 6.9 6.10 6. II). 1 6.10.2 6.10.3 Connected Line Identification Restriction No impa
24、ct, i.e. neither supplementary service affects the operation of the other supplementary service. Calling Line Identification Presentatwn No impact, Le. neither supplementary service affects the operation of the other supplementary service. Calling fine Identification Restriction No impact, i.e. neit
25、her supplementary service affects the operation of the other supplementary service. Closed User Group No impact, Le. neither supplementary service affects the operation of the other supplementary service. Conference Calling No impact, i.e. neither supplementary service affects the operation of the o
26、ther supplementary service. Direct- Dialling -In No impact, i.e. neither supplementary service affects the operation of the other supplementary service. Call diversion services Call Forwarding Busy See 3 6.10.3: Call Forwarding Unconditionai. Call Forwarding No Reply See 0 6.10.3: Call Forwarding Un
27、conditionai. Call Forwarding Unconditional When Cali Forwarding Unconditionai (o has been activated prior to the activation of OCB, the calls are forwarded regardiess of the limitations of the versioli of OCB that has been activated, i.e. in this case there exists no interaction between the two serv
28、iceS. After OCB has been activated, calls can only be forwarded to destinations which are within the limitations of the OCB version, that has bem activated. 6.10.4 Call Deflection After OCB has been activated, calls can only be deflected to destinations which are within the limitations of the OCB ve
29、rsion, that has been activated. 4 Recommendation 1.255.5 (OW) 6.11 6.12 6.13 6.14 6.15 6.16 6.17 6.18 6.19 6.20 6.21 CCITT RECMN*I=255. 5 92 D 4ieb2591 0574775 726 Line Hunting No impact, i.e. neither supplementary service affects be operation of the other supplenientary Service. Three-Party Service
30、 No impact, i.e. neither supplementary service affects the operation of the other supplementary service. User-to- User Signailing No impact, i.e. neither supplementary service affects the operation of the other supplementary service. Multiple Subscriber Number No impact, Le. neither supplementary se
31、rvice affects the operation of the other supplementary semice. Call Hold No impact, Le. neither supplementary service affects the operation of the other supplementary service. Advice of Charge No impact, i.e. neither supplementary service affects the operation of the other supplementary service. Mul
32、ti-level Precedence and Preemption No interaction - Multi-Level Precedence and Preemption (MLPP) does not override OCB restrictions. Priori0 No impact, i.e. neither supplementary service affects the operation of the other supplementary service. Malicious Call Identification Service No impact, i.e. n
33、either supplementary service affects the operation of the other supplementary service. Outgoing Call Barring Not applicable. Reverse Charging No impact, i.e. neither supplementary service affects the operation of the other supplementary service. Recommendation 1.255.5 (O/!XZ) 5 -+ CCITT RECMNtI.255.
34、 5 92 4462591 057477b bb2 6.22 Sub-addressing No impact, i.e. neither sppplementary service affects the operation of the other supplementary service. 7 Dynamic description The dynamic description of this service is shown in Figure 1iI.255.5. 6 , -i Release resources ,. . . , , . . , FIGR 1fl.255.5 Overill SDL diagram d Outgoing call Barriqg (ClCa) i .- ! Recommendado& 1255.5 (08J92)
