1、CEPT T/N*L3-04*E m 232b4LY 000b058 5 m T/N13-04 E Page 1 Recommendation T/N 13-04 (by correspondence June 1987, revised in Edinburgh 1988) SUPPLEMENTARY SERVICES ASSOCIATED WITH BEARER SERVICES Recommendation proposed by the Working Group T/W 14 “Network Aspects” (NA) Text of the Recommendation adop
2、ted by the “Telecommunications” Commission: “The European Conference of Posts and Telecommunications Administrations, considering - the common CEPT approach to the ISDN and general CEPT assumptions and policies for the evolution towards ISDN, - the I. Series Recommendations of the CCITT, as well as
3、other CCITT Recommendations on ISDN, to which - the need for CEPT Administrations to have more precise answers to their specific European requirements, i.e. - the need for CEPT Administrations to have as a base a comprehensive set of Recommendations, in order to CEPT Administrations have contributed
4、 most significantly, to select and further define material from CCITT Recommendations, promote and strengthen European harmonisation, O recommends - to the members of the CEPT that they evolve their telecommunication networks towards ISDN according to the specifications given in the attached text.”
5、) Old reference: T/GSI 02-07. Edition of February 28. 1989 I, c CEPT T/N*13-04*E D 232b424 OOOb059 7 T/N 13-04 E Page 2 1. GENERAL ASPECTS Supplementary Services are used to modify or enhance a basic Bearer Service or a Teleservice to the users needs. They can only be offered as an addition to the b
6、asic services. The capabilities to support supplementary services can be implemented in the network nodes, in specialised service centers or in terminals. The operation of supplementary services should always be consistent with basic services and other supple- mentary services characteristics. The d
7、efinition and description of individual supplementary services are given in Recommendations T/SF 3 1-05, T/SF 31-06 and T/SF 31-07. The description method of supplementary services is given in Recommendation T/GSI 01-07. General Services aspects are described in Recommendation T/GSI 02-01. The defin
8、ition of Bearer Services is given in Recommendation T/GSI 02-02. The definition of attributes and possible attribute values is given in Recommendation T/GSI 01-05. 2. SUPPLEMENTARY SERVICES TO BEARER SERVICES MATRIX For those supplementary services which will be offered during phase 1 and phase 2 of
9、 the ISDN implementa- tion, the association with the individual bearer services is contained in Annex 1. A provisional association of other supplementary services with the individual bearer services is shown in Appendix 1. This appendix needs to be completed when the supplementary services are descr
10、ibed. Note 1. The following symbols have been used in Annex 1 and Appendix 1. Where more than one variant of a supplementary service exists the supplementary service family name has been used and allocated a priority of introduction. E: Indicates that the supplementary service is essential, has a hi
11、gh priority for introduction and should be made available internationally. A: Indicates that the supplementary service is identified as additional, has a lower priority for introduction and may be available in some ISDNs. It may also be available internationally. T: Supplementary services in princip
12、le may be located in either the network or in the terminal or a combination of both. The T indicates that a terminal solution is considered to have a high priority (e.g. for the supplementary services Abbreviated Address and Repeat Last Call). Note 2. The sequence of supplementary services listed in
13、 the Annex 1 reflects the sequence of introduction as proposed by the Commission of the European Communities and adopted by the European Conference of Posts and Telecommunications Administrations. Edition of February 28, 1989 CEPT T/N*13-04* Edition of February 28, 1989 L - : 2326434 0006060 3 W T/N
14、 13-04 E Page 3 Annex 1 Matrix with the Relevance and Priority of Supplementary Services to ISDN Bearer Services -r Bearer services Supplementary service Advice of charge (2) Call waiting (1) E E E Calling line identification presentation (1) E E E E E E - E E - E E - E E - Calling line identificati
15、on restriction (1) Closed user group (1) (4) I Completion of calls to busy subscribers (2) E E E E E - E E - Conference call (2) Direct dialling in (1) - E I Diversion services (2) E E E Freefone service (2) E E E E E - E E - E E - Malicious call ident (2) Number identification, called user (2) + (5
16、) I (5) Sub-addressing (1) (4) E E E Terminal portability (1) (4) E E E (5) I Terminal selection (1) (4) E E E - E E - Three party service (2) E User to user signalling (1) (3) (4) E E E Note i. Supplementary Services to be made available in the first phase of ISDN implementation (from 1988). Note 2
17、 Supplementary Services to be made available in the second phase of ISDN implementation (1988-1993). Note 3. Initially this supplementary service may only be provided in call control messages (service 1, compare Recommenda- tions T/SF 31-05, T/SF 31-06 and T/SF 31-07). Note 4. The implementation of
18、 these supplementary services may be foreseen in a later stage in some countries. Note 5. The network does not prohibit the use of these supplementary services requested by the connected terminals or end systems. Note 6. Supplementary services to be offered with the packet mode bearer service over t
19、he B channel are as defined in CCITT Recommendation X.31; others are for further study. CEPT T/N*L3-04*E D 232b4L4 000bObL 5 = T/N 13-04 E Page 4 Appendix 1 Provisional Matrix with the Relevance of Supplementary Services to ISDN Bearer Services -r Bearer services Supplementary service Abbreviated ad
20、dress Alarm call service A A A A - - E A - - E A - - E Alarm (warning) service Booked call Call barring service Call hold (1) E E E E A - E A - E A - Cent distribution of recorded private info Cent PBX facilities (City-Wide Centrex) Change of service during an established call E E E Code/speed conve
21、rsion Credit card calling - A - A - A Date and time call record Directory enquiries AUT E - E - E - MAN Editing Expediting of a call in progress Fault reporting service E E E (5) Fixed destination call A - A - A - Note I. Further study is required on whether “call hold” is a supplementary service or
22、 only a functional component to support other supplementary services, e.g. Call Waiting, Three Party Service. Note 5. The network does not prohibit the use of these supplementary services requested by the connected terminals or end systems. Edition of February 28, 10*0 CEPT T/N*L3-04*E W 2326434 000
23、b062 7 W I T/N 13-04 E Page 5 Appendix 1 (continued) -r Bearer services Supplementary service + A A General deactivation General telecoms info I interception of calls A A t Lecture call Line hunting - E A I Logging of I/C calls I National select and ind of throughput class I Op access to and control
24、 of supplementary sews A A I Out of area lines I Packet delivery confirm A - A - Payphone service Permanent sub-number I Priority E E EI I Priority selection I T A - T A - Repeat last cai1 Sequence calling I Transfer of charge E E I universal access no E E I User selection of pad parameter settings Wide area service Edition of February 28, 1989
