1、ETS 300 136 March 1992 - Source: ETSI TC-NA Reference: T/NAl(89)21 UDC: 621.395 Key words: ISDN, supplementary service Integrated Services Digital Network (ISDN); Closed User Group (CUG) supplementary service Service description ETSI European Telecommunications Standards Institute ETSI Secretariat:
2、B.P.152 . F - 06561 Valbonne Cedex . France TP. + 33 92 94 42 O0 TF. + 33 93 65 47 16 Tx. 47 O0 40 F European Telecommunications Standards Institute 1 992. All rights reserved. No part may be reproduced or used except as authorised by contract or other written permission. The copyright and the foreg
3、oing restriction on reproduction and use extend to all media in which the information may be embodied. = 3404583 0043107 295 Page 2 ETS 300 136:1992 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you
4、have comments concerning its accuracy, please write to “ETSI Standards Management Dept.” at the address shown on the title page. ._ 3404583 0043308 121 Page 3 ETS 300 136:1992 Contents Foreword . 5 1 Scope .i 7 2 Normative references . - 7 3 Definitions . 8 4 Symbols and abbreviations . 9 5 Descript
5、ion 9 6 Procedures . 9 6.1 Provision and withdrawal 9 6.2 Normal procedures . 10 6.2.1 Activation. deactivation and registration . 10 6.2.2 Erasure 11 6.2.3 Invocation and operation 11 6.2.3.1 Originating calls . 11 6.2.3.1.1 access capability 11 6.2.3.1.2 closed user group . 11 6.2.3.1.3 access cap
6、ability 11 6.2.3.2 Terminating calls 11 6.2.4 Interrogation . 12 6.3 Exceptional procedures . 13 6.3.1 Activation. deactivation and registration . 13 6.3.2 Erasure 13 6.3.3 Invocation and operation 13 6.3.4 Interrogation . 13 Preferential closed user group without outgoing Outgoing access capability
7、 without preferential Both preferential closed user group and outgoing 7 Intercommunication considerations 13 7.1 7.2 Interworking with non-ISDNs . 13 Interworking with private ISDNs . 13 8 Interaction with other supplementary services . 14 Charging information at call setup time . 14 Charging infor
8、mation during the call . 14 Charging information at the end of the call 14 8.2 Call waiting . 14 8.3 Call hold . 14 8.4 Call transfer services 14 8.4.1 Explicit call transfer . 14 8.4.2 Single step call transfer 15 Number identification services 15 8.5.1 Calling line identification presentation 15 8
9、.5.2 Calling line identification restriction . 15 8.5.3 Connected line identification presentation 15 8.5.4 Connected line identification restriction . 15 Closed user group . 15 Completion of calls to busy subscriber . 15 8.1 Advice of charge services . 14 8.1.1 8.1.2 8.1.3 8.5 8.6 8.7 W 3404583 004
10、3109 Ob8 W Page 4 ETS 300 136:1992 8.8 8.9 8.10 8.1 1 8.1 2 8.13 8.14 8.1 5 8.1 6 8.1 7 Conference services 15 8.8.1 8.8.2 Meet-me conference . 15 Direct dialling in . 15 8.10.1 8.1 0.2 8.1 0.3 Call forwarding no reply 16 8.1 0.4 Call deflection . 16 Freephone 16 Multiple subscriber number 17 . Suba
11、ddressing . 17 . User-to-user signalling . 17 Conference call. add-on 15 Diversion services . 16 . Call forwarding unconditional 16 Call forwarding busy 16 .d . i Malicious call identificatidn i . 16 Terminal portability 17 Three party 17 -_ 3404583 0043110 BBT Page 5 ETS 300 136:1992 Foreword This
12、European Telecommunication Standard (ETS) has been produced by the Network Aspects (NA) Technical Committee of the European Telecommunications Standards Institute (ETSI). In accordance with CCIlT Recommendation 1.130 ll, the following three level structure is used to describe the supplementary telec
13、ommunications services as provided by European public telecommunications operators under the pan-European Integrated Services Digital Network (ISDN): - - .I - Stage 1: is an overall service description, from the users standpoint; Stage 2: identifies the functional capabilities and information flows
14、needed to suppog the service described in stage 1 ; and I - Stage 3: defines the signalling system protocols and switching functions needed to implement the service described in stage 1. This standard details the stage 1 aspects (overall service description) for the Closed User Group (CUG) supplemen
15、tary service. The stage 2 and stage 3 aspects are detailed in ETS 300 137 (1 992) and ETS 300 138 (1 9921, respectively. W 3404583 0043111 7Lb W Page 7 ETS 300 136:1992 1 Scope This standard defines the stage one of the Closed User Group (CUG) supplementary service for the pan-European Integrated Se
16、rvices Digital Network (ISDN) as provided by European public telecommunications operators. Stage one is an overall service description from the users point of view (see CCIlT Recommendation 1.130 ll), but does not deal with the details of the human interface itself. This standard defines the interwo
17、rking requirements of private ISDNs with.the public ISDN. In addition this standard specfiesthe base functionality where the service is provided to the user via a private ISDN. Y This standard does not specify the additional requirements where the service is provided to the user via a telecommunicat
18、ions network that is not an ISDN, but it does include interworking requirements of other networks with the public ISDN. Interactions with supplementary services not listed in Clause 8 are outside the scope of this standard. Charging principles are outside the scope of this standard. The CUG suppleme
19、ntary service enables users to form groups to and restricted. A specific user may be a member of one or more closed user specific closed user group can communicate among each other but not, outside the group. from which access is groups. Members of a in general, with users Some networks may permit c
20、losed user group members to make special calls which are outside that users closed user group requirements (e.g., calls to emergency services). This functionality and associated procedures are outside the scope of this standard. The CUG supplementary service is applicable to all telecommunications s
21、ervices. This standard is applicable to the stage two and stage three standards for the ISDN CUG supplementary service. The terms “stage two“ and “stage three“ are also defined in CCITT Recommendation 1.1 30 i1 I. Where the text indicates the status of a requirement (.e. as strict command or prohibi
22、tion, as authorisation leaving freedom, or 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 standard is met by conforming to the stage three standards with the field of application appropriate t
23、o the equipment being implemented. Therefore no method of testing is provided for this standard. 2 Normative references This ETC incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text-and the publica
24、tions are listed hereafter. For dated references, subsequent amendments to, or revisions of, any of these publications apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. t11 CCITT Recommendation 1
25、.1 30 (1 988): “Method for the characterisation of telecommunication services supported by an ISDN and network capabilities of an ISDN“. 21 CCIlT Recommendation 1.1 12 (1 988): “Vocabulary of terms for ISDNs“. I31 CCIlT Recommendation 1.21 O (1 988): “Principles of telecommunication services support
26、ed by an ISDN and the means used to describe them“. Previous page is blank 3404583 0043332 652 Page 8 ETS 300 136:1992 i41 i51 61 r71 CCITT Recommendation E.164 (1 988): “Numbering plan for the ISDN era“. CCITT Recommendation X.180 (1 988): “Administrative arrangements for international closed user
27、groups“. CCITT Recommendation Q.9 (1 988): “Vocabulary of switching and signalling terms“. ETS 300 089 (1 992): “Integrated Services Dlgital Network(1SDN); Calling Line Identification Presentation (CLIP) supplementary service; Service description“: -: . s 3 Definitions For the purposes of this stand
28、ard the following definitions apply: Integrated Services Digital Network (ISDN): see CCIlT Recommendation 1.1 12 21, 2.3, definition 308. (Basic) service; telecommunications service: see CCIlT Recommendation 1.1 12 i21, 2.2, definition 201. Supplementary service: see CCIlT Recommendation 1.210 31, 2
29、.4. ISDN number: a number conforming to the numbering plan and structure specified in CCIlT Recommendation E.164 41. Closed user group (CUG) member: a user who has subscribed to the CUG supplementary service and is one of the users in the group formed by a particular closed user group. Closed user g
30、roup (CUG) index: a value assigned by the network to identify a closed user group. This value is used in closed user group calls at the users access. Preferential CUG: a preferential closed user group is the nominated default group to be used when no closed user group or explicit outgoing access req
31、uest is received by the network. Incoming access: an arrangement which allows a member of a closed user group to receive calls from outside the closed user group. Outgoing access: an arrangement which allows a member of a closed user group to place calls outside the closed user group. Incoming calls
32、 barred within a closed user group: an access restriction that prevents a closed user group member from receiving calls from other members of that group. Outgoing calls barred within a closed user group: an access restriction that prevents a closed user group member from placing calls to other membe
33、rs of that group. Closed user group call: a closed user group call is a call which is restricted to a pre-defined group of users. Basic access: see CCIlT Recommendation 0.9 i61, 5 1, definition 1551. Primary rate access: see CCIlT Recommendation 0.9 61, 18 definition 1552. Page 9 ETS 300 136:1992 4
34、Symbols and abbreviations CG Closed User Group ISDN integrated Services Digital Network PSTN Public Switched Telephone Network a 5 Description - The CUG supplementary servibe shall apply to the basic access and to the primary rate access., The CUG supplementary service enables users to form groups t
35、o and from which access is restricted. A specific user may be a member of one or more closed user groups. Members of a specific closed user group can communicate among each other but not, in general, with users outside the group. A closed user group consists of a number of users. A closed user group
36、 can have members from one or more public networks. In the ISDN, each member of a closed user group is identified by their ISDN number (see also subclauses 8.9 and 8.13). Subscription to a closed user group shall be defined for all basic services, or in relation to one, or to a list of basic service
37、s. Closed user group members can have additional capabilities that allow them to originate calls outside the group, and/or to receive calls from outside the group. Closed user group members can have additional restrictions that prevent them from originating calls to other members of the closed user
38、group, or from receiving calls from other members of the closed user group. 6 Procedures 6.1 Provision and withdrawal The CUG supplementary service shall be provided after prior arrangement with the service provider. As a network option, the CUG supplementary service can be offered with several subs
39、cription options. For a particular closed user group, the associated set of general subscription options can apply to one basic service, to a particular set of basic services, or to all basic services (see table 1 A). A user may subscribe to one of two additional restrictions applying to each partic
40、ular closed user group: - incoming calls barred within a closed user group; - outgoing calls barred within a closed user group. A user can be a member of several closed user groups. Each network operator shall define the maximum number of closed user groups which can be allocated to an individual us
41、er. When a user subscribes to the CUG supplementary service, a network operator shall also register one of the following service arrangements as requested by the user (see table 1 BI: - closed user group calls only; - closed user group with incoming access, .e. can also receive calls which are not s
42、ubject to closed user group restrictions; or - closed user group with outgoing access, .e. can also make calls which are not subject to closed user group restrictions; or 3404583 0043114 425 W Subscription option Preferent ia1 closed user group Page 10 ETS 300 136:1992 Value - None designated (see N
43、OTE) - closed user group index - closed user group with incoming and outgoing access, .e. can also make and receive calls which are not subject to closed user group restrictions. type of inter closed user group accessibility The network shall provide a subscription option in order to enable the user
44、 to specify a preferential closed user group (see table 1 B). The user can request that no preferential closed user.group exists, or can request that a particular one of the users closed user groups (or the only one if a single closed user group applies) is used as a preferential closed user group.
45、The subscription options are shown in table 1A and table 1 B. The closed user group indices shall be allocated by prior arrangement with the service provider. 4 . / * *. - None designated - Outgoing access - lncuning access - Outgoing and incoming access The choice of preferential closed user group
46、shall be alterable only by service provider action upon request by the served user. The CUG supplementary service shall be withdrawn at the customers request, or for administrative reasons. Table 1 A - General subscription options Isutmription option Closed user groups I I _ - Intra closed user grou
47、p restrictions (for each closed user group) I Applicability to basic services (for each closed user grow) Value I I List of one or more closed user group indices - None designated - Incoming - Outgoing calls barred Mithin a closed user group calls barred within a closed user group - list of one or m
48、ore basic services - all basic services Table 1 B - Per service subscription options 6.2 Normal procedures 6.2.1 Activation, deactivation and registration The CUG supplementary service shall be activated on provision and deactivated on withdrawal by the service provider. The CUG supplementary servic
49、e requires no registration procedures. Page 11 ETS 300 136:1992 6.2.2 Erasure Not applicable. 6.2.3 Invocation and operation A user having neither the restriction of incoming calls barred within a closed user group, nor the restriction of outgoing calls barred within a closed user group can make calls to, and receive calls from, members of those closed user groups of which the user is a member. . a- Normal call establishment prdcedures shall apply to all calls on which the CUG supplemeotary service has been invoked. In a
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