1、-_ CEPT T/SF*55*E 87 2326434 O009445 5 T/SF 55 E Page 1 Recommendation T/SF 55 (Copenhagen 1987) SUPPLEMENTARY SERVICES AVAILABLE TO SUBSCRIBER COMPLEX INSTALLATIONS CONNECTED TO AN INTEGRATED SERVICES DIGITAL NETWORK (ISDN) Recommendation proposed by Working Group T/WG 7 “Services and facilities“ (
2、SF) Text of the Recomn-iendation adopted by Teecoiinicatiois Commission : “The European Conference of Posts and Telecommunications Administrations, considering 1. that Integrated Services Digital Network (ISDN) will make available New Services and Facilities for Customers Private Branch Exchanges (P
3、BX) and Local Area Networks (LAN) and allow the evolution of dedicated service PBXs (e.g. for voice only) to Integrated Services PBXs (ISPBXs), 2. that there is merit in harmonising the form in which these services are given to users in order to simplify their 3. that the services provided by one IS
4、PBX or LAN may require to interface to those services provided by another 4. the harmonised services should result in lower overall costs and faster growth, 5. that there is a need to develop within a common framework coherent arrangements for ISPBX or LAN access * operating procedure, ISPBX or LAN
5、using the ISDN, and also to other users of the ISDN, to different service provided, recommends to CEPT members 1. 1.1. 2. 2.1. 2.2. 2.3. GENERAL Application of Recommendation That in general the requirements of this Recommendation should apply equally to LANs and ISPBXs when connected to an ISDN. Th
6、e application to other Subscriber Complex Installations requires further study. DEFINITION OF A SUBSCRIBER COMPLEX INSTALLATION (SCI) ISPBX An ISPBX is a PBX which may support any or all services that can be supported by ISDN basic access. Each extension of an ISPBX may support one or a range of ser
7、vice terminals, e.g. telephony, data and telex, etc. LAN O Edition of January 15, 1988 A data communication-system, which allows a number of independent data devices to communicate with each other. A local area network is distinguished from other types of data networks in that the communica- tion is
8、 confined to a moderate sized geographic area, such as one office building, one warehouse, or one campus, etc. and a moderate data rate. This is in contrast to long-distance networks which interconnect offices in different parts of the country, networks which interconnect equipment in one room, or n
9、etworks or devices inside one piece of equipment (definition IEEE 802 committee). Other SCIs For further study. CEPT T/SF*55*E 87 232b414 0009Y4b 7 W TfSF 55 E Page 2 3. 3.1. 3.2. 3.3. 3.4. 3.5. 4. 4.1. 4.2. SUPPLEMENTARY SERVICES THAT MAY BE AVAILABLE TO SCIs That whilst it appears desirable for th
10、e same ISDN Supplementary Services to be available to all subscribers, it may not be possible to apply some Supplementary Services in SCIs which do not have DDI. Some examples of such services are: - completion of calls meeting busy; - network provided Supplementary Services that result in a reverte
11、d call (e.g. Alarm Call); - transferred Charging. That it should be possible to request for ISDN Supplementary Services at the commencement of, during or between basic calls as appropriate to the particular Supplementary Services. The validation of Supplementary Services against individual SCI exten
12、sion terminals is not considered to be a function of the ISDN. An exception to this may be Closed User Groups (CUGs). That it may be more appropriate for some Supplementary Services to be provided by the SCI (e.g. Night Busying) instead of in the public network. That additional Supplementary Service
13、s, over and above those normally available to the basic ISDN subscribers access, should be available to SCI users. These are listed below together with the preferred means of provision and activation. SUPPLEMENTARY PREFERRED MEANS PREFERRED MEANS SERVICE OF PROVISION/ OF ACTIVATION DDI ADMIN ACTION
14、ADMIN ACTION CONTROL LINE HUNTING 1 ADMINACTION I ADMIN ACTION NIGHT SERVICES 1 SCI ACTION I SCIACTION MAJOR FAILURE ADMIN ACTION RECOGNITION SERVICE RECOGNITION OF SCI FAILURE SUPPLEMENTARY SERVICES PROVIDED BY AN EDN WHICH MAY NOT BE AVAILABLE TO SCIs The following Supplementary Services may be pr
15、ovided by SCIs instead of by the ISDN: Abbreviated Address Alarm Call Call Barring Service Data and Time Call Record Night Services at SCI Repeat Last Call The following Supplementary Services may not be provided by the ISDN to SCIs (for the definitions, see section 6,): a Alpha-Numerical display at
16、 SCI-terminals b Call Diversion inhibition at SCI c Call Storage and Retrieval at SCI d Chief-Secretary service at SCI e Dial answer of group calls at SCI f Emergency Call service at SCI g Expedition of a call in progress at SCI h Group Hunting at SCI i Night Services at SCI j Pagingat SCI k Priorit
17、y access to the SCI-operator I . Edition of January 15, 1988 CEPT T/SF*S5*E 87 2326434 0009447 9 9 2. ADVICE OF CHARGE 3. ALARM CALL SERVICE 1 X X 4. ALARM (WARNING) SERVICE 5. BOOKED CALL X X 7. CALL FORWARDING SERVICE 8. CALLHOLD X X 24. 25. FAULT REPORTING SERVICE EXPEDITING OF A CALL IN PROGRESS
18、 X X T/SF 55 E I Page 3 5. RELEVANCE OF EACH SUPPLEMENTARY SERVICE PROVIDED BY THE ISDN THAT MAY BE AVAILABLE TO SCIs The matrix indicates the relevance of the Supplementary Services recommended for an ISDN (T/SF 31-05) that may be available to SCIs. The definitions of these Supplementary Services a
19、pply to SCI extension when in the definitions “subscriber” is read as “extension user”. There are three entries: - relevance to SCIs with DDI - relevance to SCIs non DDI - relevance to SCI-operator The following symbols have been used in the matrix: X indicates that the Supplementary Service is cons
20、idered relevant - indicates that the Supplementary Service is considered not relevant - N O N D D I - O P E R A T O R RELEVANCE TO SCI I SUPPLEMENTARY SERVICE PROVIDED BY THE ISDN 1. ABBREVIATED ADDRESS Ix X X X X X - X X - 6. CALL BARRING SERVICE I x- X X - X X - 9. CALL WAITING X 10. CENT DISTRIBU
21、TION OF RECORDED PRIVATE INFO X X X X X 11. CENT PBX FACILITIES X 12. CHANGE OF SERVICE DURING AN ESTABLISHED CALL X X X - 13. CLOSED USER GROUP X X - 14. CODE/SPEECH CONVERSION X 15. COMPLETION OF CALLS TO BUSY SUBSCRIBERS X X 16. CONFERENCE CALL X 17. CREDIT CARD CALLING X X X X 18. DATE AND TIME
22、CALL RECORD X 19. DIRECT DIALLING IN X X X X - - 20. DIRECTORY ENQUIRIES 21 MAN X 22. DIVERSION SERVICE X 23. EDITING X X X X - X - Edition of January 15, 1988 CEPT T/SF*55*E 87 m 232b414 0009Ll48 O m TfSF 55 E Page 4 RELEVANCE TO SCI D D I N O N D D I - X SUPPLEMENTARY SERVICE PROVIDED BY THE ISDN
23、126. FIXED DESTINATION CALL 27. FREEFONE SERVICE X 28. GENERAL DEACTIVATION X I 29. GENERAL TELECOMS INFO 30. INTERCEPTION OF CALLS X 31. LECTURE CALL X I 32. LINE HUNTING Ix X 33. LOGGING OF I/C CALLS X 34. MALICIOUS CALL IDENT X X 35. NATIONAL SELECT AND IND OF THROUGHPUT CLASS X 36. NUMBER IDENTI
24、FICATION X I 37. OP ACCESS TO AND CONTROL OF SUPPLEMENTARY SERVS I -x- X X - 38. OUT OF AREA LINES X 39. PACKET DELIVERY CONFIRM X X 40. PAYPHONE SERVICE X 41. PERMANENT SUB NUMBER X 142. PRIORITY Ix 43. PRIORITY SELECTION X 44. REPEAT LAST CALL X 45. SEQUENCE CALLING X 46. SUB ADDRESSING X X 47. TE
25、RMINAL PORTABILITY X 48. TERMINAL SELECTION X I 49. THREE PARTY SERVICE Ix 50. TRANSFER OF CHARGE X 51. UNIVERSAL ACCESS NO X X 52. USER TO USER SIGNALLING X 53. USER SELECTION OF PAD PARAMETER SETTINGS X I 54. WIDE AREA SERVICE Ix Edition of January 15, 1988 T/SF 55 E Page 5 6. DEFINlTIONS OF SUPPL
26、EMENTARY SERVICES THAT MAY NOT BE PROVIDED BY THE ISDN TO SCIs k ALPHA-NUMERICAL DISPLAY AT SCI TERMINALS The visual display at an extension users terminal sent to or received from the SCI switching equipment. This display comprises Information of Outging and/or Incoming calls. CALL DIVERSION INHIBI
27、TION AT SCI The possibility of an extension user to delete, or prevent, generally or selectively, diversion to his extension. CALL STORAGE AND RETRIEVAL AT SCI The possibility for a user to hold a call at one extension and, subsequently, to retrieve it at another or the same extension. CHIEF-SECRETA
28、RY SERVICE AT SCI The possibility to offer to chief and secretary extensions, services that apply only to the mutual traffic between these extensions. The extensions are equipped with standard terminals. DIAL ANSWER OF GROUP CALLS AT SCI The possibility for any free extension which is a member of a
29、group, to answer calls presented to the group by means of an audible/visual signal by dialling a short code. EMERGENCY CALL SERVICE AT SCI The possibility for a user to be given a fast and easy means of notifying emergency situation to the appropriate emergency authority (e.g. fire brigade, police,
30、ambulance). EXPEDITING OF A CALL IN PROGRESS AT SCI Intervention by an operator, interrupting a call in progress in order to allow another incoming call to be offered. GROUP HUNTING AT SCI The possibility for the automatic selection at a SCI of a free extension from a group of extensions when a call
31、 is placed to the group number. NIGHT SERVICES AT SCI The possibility for a subscriber to arrange that, during period while no operators positions are staffed, some or all calls incoming to the PABX are offered to one or more extensions. PAGING AT SCI The possibility for extension users and operator
32、s to bring to the attention of ambulant extension users that they are wanted by an incoming call. The device used to gain attention may be accoustic or electronic. The called/paged person can answer from any extension with pick-up facility. PRIORITY.ACCESS TO THE SCI OPERATOR The possibility for nominated users to have priority access to the SCI operator.” Edition of January 15, 1988
