1、= 3404583 0048877 531 ETS 300 183 October 1992 Source: ETSI TC-NA Reference: T/NA1(89)25 UDC: 621.395 Key words: ISDN, supplementary service Integrated Services Digital Network (ISDN); Conference call, add-on (CONF) supplementary service Service description ETSI European Telecommunications Standards
2、 Institute ETSI Secretariat Postal address: 06921 Sophia Antipolis Cedex - FRANCE Ofce 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 1 992. All rights reserved. No par
3、t 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. m 3r104583 0048878 478 m Page 2 ETS 300 183:1992 . Whilst every care has been ta
4、ken 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 Standards Management Dept.“ at the address shown on the title page. Page 3 ETS 300 183:1992 Contents Foreword . 5 1 S
5、cope . 7 2 Normative references 7 3 Definitions . 8 4 Symbols and abbreviations . 8 5 Description 8 6 Procedures . 9 6.1 Provision and withdrawal 9 6.2 Normal procedures . 9 6.2.1 Activation. deactivation and registration . 9 6.2.2 Erasure 9 6.2.3 Invocation and operation 9 Beginning the conference
6、from the idle state 9 Beginning the conference from an active call 9 Managing the conference 10 Actions available to conferees 10 Notification of participants . 11 6.2.4 Interrogation . 11 6.3 Exceptional procedures . 11 6.3.1 Activation. deactivation and registration . 11 6.3.2 Erasure 11 6.3.3 Inv
7、ocation and operation 11 6.3.4 Interrogation . 11 6.2.3.1 6.2.3.2 6.2.3.3 6.2.3.4 6.2.3.5 7 Intercommunication considerations 12 Interworking with non ISDNs . 12 Interworking with private ISDNs . 12 7.1 7.2 8 Interaction with other supplementary services . 12 8.1 Advice of charge services 12 Chargin
8、g information at call Set-up time 12 8.1.1.1 Conference controller 12 8.1 .i . 2 Conferees . 13 Charging information during the call . 13 8.1.2.1 Conference controller 13 8.1.2.2 Conferees . 14 Charging information at the end of a call 15 8.1.3.1 Conference controller 15 8.1.3.2 Conferees . 16 8.2 C
9、all waiting . 16 8.3 Call hold . 16 8.4 Explicit call transfer 16 8.5 Number identification services 16 8.5.1 Calling line identification presentation . 16 8.5.2 Calling line identification restriction 16 8.5.3 Connected line identification presentation . 16 8.5.4 Connected line identification restr
10、iction 16 Closed user group 17 8.1.1 8.1.2 8.1.3 8.6 340V583 0048880 026 Page 4 ETS 300 183:1992 8.7 8.8 8.9 8.10 8.1 1 8.12 8.13 8.14 8.1 5 8.16 8.1 7 Completion of calls to busy subscriber . 17 Conference services 17 8.8.2 Meet-me conference . 17 Direct dialling in . 17 Call forwarding uncondition
11、al 17 Call forwarding busy 17 8.8.1 Conference call. add-on 17 Diversion services . 17 8.10.1 8.10.2 8.10.3 Call forwarding no reply 17 8.10.4 Call deflection . 17 Freephone . 18 Malicious call identification 18 Multiple subscriber number 18 Subaddressing . 18 Three party 18 User-to-user signalling
12、. 18 Terminal portability . 18 Annex A (informative): Management of active and held calls . 20 A . 1 Introduction 20 A.2 History 21 Functionality available to the served user controlling more than one call 20 . 3404583 0048881 Tb2 Page 5 ETS 300 183:1992 Foreword This European Telecommunication Stan
13、dard (ETSI has been produced by the Network Aspects (NA) Technical Committee of the European Telecommunications Standards Institute (ETSI). In accordance with CCIlT Recommendation 1.130 ill, the following three level structure is used to describe the supplementary telecommunications services as prov
14、ided by European public telecommunications operators under the pan-European Integrated Services Digital Network (ISDN): - Stage 1 : is an overall service description, from the users standpoint; - Stage 2: identifies the functional capabilities and information flows needed to support the service desc
15、ribed in stage 1 ; and - 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 Conference call, add-on (CONF) supplementary service. The stage 2 an
16、d stage 3 aspects are detailed in ETC 300 184 (1 992) and ETS 300 185 (1 9921, respectively. = 3404583 0048882 T Page 7 ETS 300 183:1992 1 Scope This standard defines the stage one of the Conference call, add-on (CONF) supplementary service for the pan-European Integrated Services Digital Network (I
17、SDN) as provided by European public telecommunications operators. Stage one is an overall service description from the users point of view (see CCITT Recommendation 1.130 ill), but does not deal with the details of the human interface itself. This standard defines the interworking requirements of pr
18、ivate ISDNs with the public ISDN. In addition, this standard specifies the base functionality where the service is provided 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 no
19、t an ISDN but 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 CONF supplementary service enables a us
20、er to participate in, and control, a simultaneous communication involving a number of users. The CONF supplementary service is applicable to all circuit-switched telecommunications services carrying speech. This standard is applicable to the stage two and three standards for the ISDN CONF supplement
21、ary service. The terms “stage two“ and “stage three“ are also defined in CCIlT Recommendation 1.1 30 111. Where the text indicates the status of a requirement, (Le. as strict command or prohibition, as authorisation leaving freedom, or as a capability or possibility), this shall be reflected in the
22、text of the relevant stage two and three standards. Furthermore, conformance to this standard is met by conforming to the stage three standard with the field of application appropriate to the equipment being implemented. Therefore, no method of testing is provided for this standard. 2 Normative refe
23、rences This standard incorporates, by dated or undated reference, provisions from other 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 pu
24、blications apply to this standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. CCITT Recommendation 1.1 30 (1 988): “Method for the characterisation of the telecommunication services supported by an ISDN and
25、network capabilities of an ISDN“. t21 CCIlT Recommendation 1.1 12 (1988): “Vocabulary of terms for ISDNs“. 131 41 CCITT Recommendation 1.21 O (1 988): “Principles of telecommunication services supported by an ISDN and the means to describe them“. CCITT Recommendation 0.9 (1 988): “Vocabulary of swit
26、ching and signalling terms“. Previous page is blank m 3404583 0048883 835 m Page 8 ETS 300 183:1992 3 Definitions For the purposes of this standard, the following definitions apply: Integrated Services Digital Nstwork (ISDN): see CCITT Recommendation 1.1 12 121, 5 2.3, definition 308. Service; telec
27、ommunications service: see CCIlT Recommendation 1.1 12 i21, 5 2.2, definition 201. Supplementary service: see CCITT Recommendation 1.210 31, 0 2.4. Served user: the user to whom the CONF supplementary service is provided. Basic access: see CCITT Recommendation Q.9 i41, 0 1, definition 1551. Primary
28、rate access: see CCITT Recommendation 0.9 i41, 9 1 , definition 1552. Conference: a call having the capability of involving a number of users who can communicate simultaneously. Conference controller: the (served) user who invokes the CONF supplementary service and controls the addition and removal
29、of conferees. Conferee: any user involved in the conference, other than the conference controller. Party: any user participating in the conference. Private communication: a communication between the conference controller and another user who may be a past/potential conferee. This communication is en
30、tirely separate from the conference. (Existing) active call: a call for which the connection has been established. Idle state: in this state, the user invokes the CONF supplementary service without an associated call. 4 Symbols and abbreviations ISDN Integrated Services Digital Network CONF Conferen
31、ce call, add-on PSTN Public Switched Telephone Network 5 Description The CONF supplementary service shall apply to the basic access and to the primary rate access. The CONF supplementary service enables a user to participate in and control a simultaneous communication involving a number of users. Th
32、e CONF supplementary service can be invoked from the idle state. As a network option, the CONF supplementary service can be invoked from an existing active call. When the CONF supplementary service is invoked, conference resources are allocated to the served user. In the case of invocation from an a
33、ctive call, this call will be connected to the conference resources. . Page 9 ETS 300 183:1992 6 Procedures 6.1 Provision and withdrawal The CONF supplementary service shall be provided by prior arrangement with the service provider. The maximum number of parties allowed in a conference shall be a n
34、etwork option. The CONF supplementary service shall be withdrawn by the service provider upon request by the subscriber or for service provider reasons. 6.2 Normal procedures 6.2.1 Activation, deactivation and registration Not applicable. 6.2.2 Erasure Not applicable. 6.2.3 Invocation and operation
35、The CONF supplementary service can be invoked from the idle state. As a network option, the CONF supplementary service can be invoked from an existing call. NOTE: It is the responsibility of the user to ensure that the calls are compatible. 6.2.3.1 Beginning the conference from the idle state The se
36、rved user can request the CONF supplementary service. The number of parties required in the conference can be indicated in the request. If the number of parties is not indicated, a maximum value allowed by the network shall be used. A successful request for the CONF supplementary service shall resul
37、t in the network reserving conference resources capable of serving the required number of parties. 6.2.3.2 Beginning the conference from an active call As a network option, the following procedures can be used when a user already has a call on which the connection has been established. The served us
38、er can request the CONF supplementary service, indicating in the request that an existing call shall be connected to the conference. The number of parties required in the conference can be indicated in the request. If the number of parties is not indicated, the maximum value allowed by the network s
39、hall be used. A successful request for the CONF supplementary service shall result in the network assigning conference resources capable of supporting the required number of parties. The other user in the call indicated in the request for the CONF supplementary service shall be connected to the conf
40、erence. If the call indicated in the request was not held by the served user, then the served user shall be connected to the conference. If the call indicated in the request was held by the served user, then the conference shall be held by the served user. The conferee shall be notified that their c
41、all has been added to the conference (see subclause 6.2.3.5). 9 3404583 0048885 608 9 Page 10 ETS 300 183: 1992 6.2.3.3 Managing the conference During the conference, the served user can: - invoke the call hold supplementary service in order to put their own connection to the conference on hold. Whi
42、lst the conference is on hold, the remaining parties in the conference can communicate with each other. The served user can then make a call to a potential conferee; - create a private communication with one of the parties. The network shall place the conference on hold for the served user. The requ
43、ired party shall be removed from the conference and connected to the served user. The private communication shall be considered as a normal call. Whilst the conference is on hold, the remaining parties can still communicate with each other; - terminate the entire conference, i.e. all connections to
44、the conference shall be terminated and the conference resources shall be released; - explicitly disconnect one party from the conference, i.e. the connection between that party and the conference shall be terminated; - add a conferee, to which a private communication has been established, provided t
45、he maximum number of parties is not exceeded. For an incoming call on which the connection has already been established, the conference controller can request that this call be added into the conference using the add-on procedures. As a network option, this request can be accepted or rejected; After
46、 addition of a party, the connection between the served user and the conference shall remain in the state it was prior to the request to add the potential conferee. If the conference was on hold, the served user shall retrieve the conference in order to participate in the conference; - isolate a con
47、feree. The conferee indicated by the conference controller shall be prevented from communicating with the conference without being removed from it; - reattach a conferee previously isolated. The conferee can communicate again with the other parties in the conference. If only one conferee remains, or
48、 no conferees remain, as a result of any of the above operations, the conference shall be considered to still be in progress. 6.2.3.4 Actions available to conferees During the conference any of the conferees can: - invoke the call hold supplementary service in order to put their own connection to th
49、e conference on hold; or - release their connection to the conference. If only one conferee remains, or no conferees remain, as a result of any of the above operations, the conference shall be considered to still be in progress. 3404583 004888b 544 W Page 11 ETS 300 183:1992 6.2.3.5 Notification of participants Each participant in the conference shall be informed by the service provider about the state of their call when a change occurs. When a party is added to the conference, a patty is explicitly disconnected from the conference, a party is removed from the conference in order t
