1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T Series E.300 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Supplement 1 (11/1988) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS Operation of the international service List of possible supplementary telephone
2、 services which may be offered to subscribers ITU-T E.300-series Recommendations Supplement 1 (Formerly CCITT Recommendations) ITU-T E-SERIES RECOMMENDATIONS OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS INTERNATIONAL OPERATION Definitions E.100E.103 General provi
3、sions concerning Administrations E.104E.119 General provisions concerning users E.120E.139 Operation of international telephone services E.140E.159 Numbering plan of the international telephone service E.160E.169 International routing plan E.170E.179 Tones in national signalling systems E.180E.189 N
4、umbering plan of the international telephone service E.190E.199 Maritime mobile service and public land mobile service E.200E.229 OPERATIONAL PROVISIONS RELATING TO CHARGING AND ACCOUNTING IN THE INTERNATIONAL TELEPHONE SERVICE Charging in the international telephone service E.230E.249 Measuring and
5、 recording call durations for accounting purposes E.260E.269 UTILIZATION OF THE INTERNATIONAL TELEPHONE NETWORK FOR NON-TELEPHONY APPLICATIONS General E.300E.319 Phototelegraphy E.320E.329 ISDN PROVISIONS CONCERNING USERS E.330E.349 INTERNATIONAL ROUTING PLAN E.350E.399 NETWORK MANAGEMENT Internatio
6、nal service statistics E.400E.409 International network management E.410E.419 Checking the quality of the international telephone service E.420E.489 TRAFFIC ENGINEERING Measurement and recording of traffic E.490E.505 Forecasting of traffic E.506E.509 Determination of the number of circuits in manual
7、 operation E.510E.519 Determination of the number of circuits in automatic and semi-automatic operation E.520E.539 Grade of service E.540E.599 Definitions E.600E.649 Traffic engineering for IP-networks E.650E.699 ISDN traffic engineering E.700E.749 Mobile network traffic engineering E.750E.799 QUALI
8、TY OF TELECOMMUNICATION SERVICES: CONCEPTS, MODELS, OBJECTIVES AND DEPENDABILITY PLANNING Terms and definitions related to the quality of telecommunication services E.800E.809 Models for telecommunication services E.810E.844 Objectives for quality of service and related concepts of telecommunication
9、 services E.845E.859 Use of quality of service objectives for planning of telecommunication networks E.860E.879 Field data collection and evaluation on the performance of equipment, networks and services E.880E.899 For further details, please refer to the list of ITU-T Recommendations. E.300 series
10、Supplement 1 (11/1988) i Supplement 1 to ITU-T E.300-series Recommendations List of possible supplementary telephone services which may be offered to subscribers Summary This supplement lists the different supplementary services that were foreseen in 1988 for ISDN networks. Source Suplement 1 was ap
11、proved in Melbourne (1988) and originally published in Blue Book, Fascicle II.2. ii E.300 series Supplement 1 (11/1988) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sect
12、or (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets eve
13、ry four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSC Resolution 1. In some areas of information technology which fall within ITU-Ts purvie
14、w, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this publication, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention
15、 to the possibility that the practice or implementation of this publication may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outsid
16、e of the publication development process. As of the date of approval of this publication, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this publication. However, implementors are cautioned that this may not represent the latest inform
17、ation and are therefore strongly urged to consult the TSB patent database. ITU 2002 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. E.300 series Supplement 1 (11/1988) iii CONTENTS Page 1 Supplementary services
18、 which might have implications for the international service 1 1.1 Absent subscriber service 1 1.2 Do not disturb service 2 1.3 Diversion if number busy service 3 1.4 Customer dialled operator assisted call . 4 1.5 Freephone service 4 1.6 Wide area telephone service 5 1.7 Automatic transferred debit
19、ing of charges 6 1.8 Radio paging 6 1.9 Direct dialling-in . 7 1.10 Incoming call barring 7 1.11 Registration of incoming calls. 8 1.12 Completion of calls to busy subscribers service 8 1.13 Automatic transferred charge call 9 1.14 Remote call forwarding . 10 1.15 Three party services. 10 1.16 Confe
20、rence call services 12 1.17 Calling number indication . 13 1.18 Subscribers alpha-numerical display 13 1.19 Private number ringing signal 13 1.20 Voice mailbox service (VMS). 14 2 Supplementary services without implications for the international service 15 2.1 Abbreviated dialling services 15 2.2 Al
21、arm call services 15 2.3 Automatic booked call. 16 2.4 Diary service 16 2.5 Restriction in the outgoing direction service . 16 2.6 PBX line hunting services . 17 2.7 Subscriber call charge meter 17 2.8 Automatic verbal announcement of charges applied service 18 2.9 Printed record of duration and cha
22、rge of calls service. 18 2.10 Automatic credit card service 18 2.11 Selective accounting 19 2.12 Customer recorded information service. 19 2.13 Public recorded information service 19 2.14 Emergency call service 19 2.15 Centrex service 20 2.16 Babyphone. 20 2.17 Transmission of a verbal message . 20
23、2.18 Universal access number . 21 2.19 Message relay 21 2.20 Interruption of a call in progress 21 2.21 Fixed destination call services. 21 2.22 Pick-up facility 22 2.23 Call waiting services 22 2.24 Dual telephone numbers 22 2.25 Voice dialling 23 2.26 Number repetition service . 23 2.27 Lecture ca
24、ll 23 iv E.300 series Supplement 1 (11/1988) Page Appendix I Telephone services, considered as nonsupplementary. 24 I.1 Payphone service. 24 I.2 Directory inquiry service. 24 I.3 General telecommunications information service . 24 I.4 Interception of calls . 25 I.5 Priority. 25 I.6 Malicious call id
25、entification services 25 E.300 series Supplement 1 (11/1988) 1 Supplement 1 to ITU-T E.300-series Recommendations List of possible supplementary telephone services which may be offered to subscribers The descriptions given here are considered provisional and require further study. Numbers in parenth
26、eses following the designation of most services refer to the CEPT handbook 1 where detailed operational requirements are given. 1 Supplementary services which might have implications for the international service 1.1 to 1.11 refer to services which might be standardized and which do not require tech
27、nical studies. 1.1 absent subscriber service (4.1) F: service des abonns absents S: servicio de abonado ausente 1) Definition The possibility for a subscriber who cannot answer his calls, because he is absent, to divert these calls to: a manual answering service, another subscribers number or an ann
28、ouncement. 2) Description A subscriber who knows he will be absent from his telephone can instruct the exchange to divert his incoming calls to: a manual answering service, another subscribers number or an announcement giving appropriate information. Some forms of the service are available to subscr
29、ibers without a preliminary agreement with the Administration, but other forms require such an agreement. An indication that the service is in operation should be given to the diverting subscriber. Outgoing calls are available normally. 3) Remarks CCITT should undertake studies on: indications given
30、 to calling and called subscriber; additional charges if any when diverting the call to a distant number. 4) Market data Generally considered of medium interest. Terminating equipment providing diversion to announcements in widespread use in some countries. 5) General operational requirements If div
31、erting a call lengthens the post-dialling delay experienced by a caller, it may be necessary to advise the caller that his call is being diverted. If diverting a call would result in the caller having to pay additional charges, a warning should be given to the caller before the call is diverted. 2 E
32、.300 series Supplement 1 (11/1988) To minimize complaints from called subscribers and callers for wrongly programmed call transfers, some check should be provided. Difficulties may arise if a subscriber receiving diverted calls diverts them again to yet another number. Some subscribers may, instead
33、of using an absent subscriber service, use answering machines on their own premises. Some Administrations may also decide to provide such facilities at the exchange. The degree of sophistication provided may vary considerably. Some may only give a fixed announcement common to all customers using the
34、 service, others may allow messages to be recorded. Which type is used and to what extent may vary from one country to another according to the technological or social situation. A large majority of customers will accept a reply by a recorded announcement as a satisfactory alternative to an operator
35、. Certain categories of subscribers (e.g. doctors) have special requirements and prefer a service especially adapted to their professional field. This may be a manual answering service provided by the Administration, or by a private agency or special arrangements for diversion to other numbers. Call
36、s should only be diverted if the resulting standards of transmission are adequate. When the service is activated the special dial tone may be given to the controlling subscriber. 6) Charging principles 1.2 do not disturb service (5.1) F: service “ne pas dranger” S: servicio “no molestar” 1) Definiti
37、on The possibility for a subscriber, who does not wish to answer his telephone during a period of time, to divert incoming calls. 2) Description Do not disturb services are used by subscribers that do not wish to be disturbed by incoming calls for a certain period of time. They can request that inco
38、ming calls are diverted to an operator, an answering machine in the exchange, or another telephone number. The diversion can be switched on and off by an operator (manual) or by the subscriber himself (automatic). 3) Remarks 4) Market data A little market information is available but it is considere
39、d to be of medium interest only. Nevertheless this is a service which should be available to customers. 5) General operational requirements It is in the interest of the Administration if calling subscribers can leave messages and be informed: of the reason for call diversion when the number can be r
40、eached again where more information can be obtained. In this way incoming calls are answered and can be charged and ineffective new attempts are avoided. Automatic deactivation is desirable because no indication is given to the called subscriber when incoming calls arrive. Administrations should pro
41、vide an attractive form of do not disturb service in order to avoid undesirable subscriber forms of the service. The time during which a do not disturb service can be activated should be limited. The automatic forms of the service are preferred. E.300 series Supplement 1 (11/1988) 3 Outgoing calls s
42、hould normally be possible. When the service is activated a special dial tone may be given for outgoing calls reminding the service holder of the special condition of his line. If during a period when the facility is in operation, the renter requires to know whether a message has been left, a specia
43、l code may be allocated for this purpose, or a password agreed with the exchange may be used. 6) Charging principles Charging principles should be in accordance with Recommendation E.232. 1.3 diversion if number busy service (6.3) F: service de transfert dappel en cas de numro occup S: servicio de t
44、ransferencia de llamadas en caso de lnea ocupada (transferencia por ocupacin) 1) Definition The possibility for a subscriber who cannot receive calls, because his number is busy, to have these calls diverted. 2) Description A subscriber who does not wish incoming calls to his number to be unsuccessf
45、ul because he is busy speaking, can instruct the exchange to immediately divert his incoming calls to either a manual answering service, or another subscribers number. Some forms of service are available to subscribers without prearrangement with the Administration but other forms require prearrange
46、ment. The other subscribers number may be one number, one number of a predetermined group or the first available number in a sequence. 3) Remarks CCITT should undertake studies on: indication given to calling and called subscriber; additional charges, if any, when diversion is to a distant subscribe
47、r number. 4) Market data 5) General operational requirements As services permit the completion of calls which would otherwise have met busy conditions, increased revenue and a better use of the available equipment may result. Services may be of value for a subscriber whose line or lines are occasion
48、ally overloaded. In conventional switching systems it is not possible to change the routing of a call in the switching network itself. It is therefore necessary in those circumstances to divert it from the diverting number. If limitations of transmission or charging justify it, it may be necessary t
49、o refuse a diversion request to a nominated number too far from the diverting exchange, and possibly divert the call to the operator, or a recorded announcement. While a service is activated under subscribers control it may be desirable to return a warning indication to the diverting termination. The number to which the incoming call is diverted need not belong to the controlling subscriber. It may be necessary to advise the caller that his call is being diverted if the post-dialling delay is lengt
