1、- W 2326434 O009239 2 W T/SF 31 -07 E Page 1 O Recommendation T/SF 31-07 (Copenhagen 1987) OPERATIONAL REQUIREMENTS OF ISDN SUPPLEMENTARY SERVICES 1. GENERAL ASPECTS 1.1. That Operational Requirements of the Supplementary Services with Service Prose Definition and Descrip- tion (Stage 1) should be m
2、ade available. That the description method described in Annex O should be used in describing operational requirements. 1.2. 2. OPERATIONAL REQUIREMENTS The Operational Requirements for the following Supplementary Services are contained in the annexes to this appendix: Annex 1: Advice of Charge Annex
3、 2: Call Waiting Annex 3 : Called Line Identification Presentation Annex 4: Calling Line Identification Presentation (CLIP) Annex 5 : Calling Line Identification Restriction (CLIR) Annex 6: Closed User Group (CUG) Annex 7: Completion of Calls to Busy Subscriber (CCBS) Annex 8 : Conference Calling, A
4、dd-on Annex 9: Direct Dialling In (DDI) (Diversion Services :) Annex 10: - Call Forwarding Unconditional Annex 11: - Call Forwarding Busy Annex 12: - Call Forwarding No Reply Annex 13 : Sub-Addressing Annex 14: Terminal Portability Supplementary Service Annex 15 : Terminal Selection Annex 16: Three
5、Party Service Annex 17: User to User Signalling Edition of January 15, 1988 - CEPT T/SF*3E-O7*E * 2326434 0009240 9 I - 8 s 4 r N 3 s I I + I I I I _tl I I .I T/SF 31 -07 E , Annex O, Page 1 i Edition of January 15, 1988 CEPT T/SF*33-07*E * 232b434 0007243 O W 1. 2. 2.1. 2.2. 3. 3.1. 3.2. 3.3. 3.4.
6、3.5. 3.6. T/SF 31 -07 E Annex 1, Page 1 Annex 1 ADVICE OF CHARGE DEFINITION This supplementary service provides charging information to an ISDN user for all chargeable calls. DESCRIPTION Advice of charge supplementary service allows the served user being charged for a call to be advised of charging
7、information applicable to that call. Charging information may be available for the user at three stages of the call: 1. charging information at the beginning of the call, 2. charging information during an established call, to indicate the progression of charges applied, and/or 3. charging informatio
8、n at the end of the call, to indicate the overall charges applied to that call. The charging information will consist of the accumulated charging units. If extra charges in terms of additional units are applied, this information should be included in the charging information. to be applied to that c
9、all, Applicabiliy This supplementary service is applicable to all basic telecommunication services. NORMAL PROCEDURES WITH SUCCESSFUL OUTCOME Provision Provision of the service is on a subscription basis or may be generally available. A limited version of the service may be offered which only gives
10、the overall call charging information at the end of the call. This version of the service is only provided on a subscription basis. Withdrawal At the request of the subscriber or for administrative reasons. Registration Not applicable. Erasure Not applicable. Activation Deactivation When provided on
11、 a subscription basis, the service is activated/deactivated by the network (Administration) for the subscription period and it is applied to every call for which the user is charged. If generally available, the service is activated on a call by call basis when the user invokes the service. Edition o
12、f January 15, 1988 CEPT T/SF*33-07*E * 2326434 0009242 2 T/SF 31 -07 E Annex 1, Page 2 3.7. 3.8. 3.9. 3.10. 3.11. 3.12. 4. 4.1. 4.2. 4.3. 4.4. 4.5. 4.6. 4.7. Invocation The service is invoked: -either automatically by the network for each chargeable call, when the service is provided on a subscripti
13、on basis; - or by the user on a call by call basis, if the service is generally available. Normal operation with successful outcome When the service has been invoked, information on accumulated charging units is sent to the user by the network without any specific user request: - at the beginning of
14、 the call, - periodically during the call, - at the end of the call (when charging is completed). This information should be updated for each additional unit up to a maximum rate of approximately one update per second. Quality of Service For further study. Testing Not applicable. Interrogation Not a
15、pplicable, Charging requirements On a subscription basis or on a usage basis if the service is generally available. EXCEPTIONAL PROCEDURES OR UNSUCCESSFUL OUTCOME Exceptional operation or unsuccessful outcome Under certain conditions (e.g. equipment failure, reverse charging) charging information ma
16、y not be available. In this situation the customer could be given an indication that the service is not operating. Registration Not applicable. Erasure Not applicable. Activation Not applicable. Deactivation Not applicable. Invocation Not applicable. Testing Not applicable. Edition of January 15, 19
17、88 CEPT T/SF*33-07*ETF* 2326434 0009243 4 = 4.8. 4.9. 5. 6. 6.1. 6.2. 6.3. 6.4. 6.5. 6.6. 6.7. 6.8. 6.9. 6.10. 6.11. T/SF 31 -07 E Annex 1, Page 3 Interroga tion Not applicable. Charging requirements Not applicable. ALTERNATE PROCEDURES No alternate procedures are identified. INTERACTION WITH OTHER
18、SUPPLEMENTARY SERVICES Call Waiting No interaction. Calling Line Identification Presentation No interaction. Calling Line Identification Restriction No interaction. Direct Dialling In No interaction. Closed User Group No interaction. Terminal selection No interaction. User to User Signalling No inte
19、raction. Sub-addressing No interaction. Terminal portability When the call is in the suspended state no charging information is sent to the user; on resumption of the call the sending of charging information will start again (with the updated value of the number of charging units since the beginning
20、 of the call). Three party service Hold for enquiry: if more than one call is in progress at the same user terminal, the charging information should be sent separately for each individual call independently of the call state (active or held). In this case, the maximum rate for providing charging inf
21、ormation should not be exceeded. Three party speech: for further study. Called Line Identification No interaction. Edition of January 15, 1988 -I? T/SF 31 -07 E Annex 1, Page 4 6.12. 6.13. 6.14. 6.15. 6.16. 6.17. 6.18. 6.19. 7. 8. 9. 9.1. 9.2. 9.3. 9.4. Malicious call identification For further stud
22、y (in principle there is no interaction). Conference call For further study. Freephone For further study. Cali Forwarding Unconditional When a call is forwarded and the original called user is charged for the forwarded part of the call and has advice of charge activated, charging information are not
23、 sent to this called user. Call Forwarding Busy See Call Forwarding Unconditional. Cail Forwarding No Reply See Call Forwarding Unconditional. Cali Deflection See Call Forwarding Unconditional. Completion of Calls to Busy Subscriber For further study. INTERWORKING CONSIDERATIONS For further study. O
24、VERALL SDL For further study. ATTRIBUTES Means of SubscBption/Provision N (Network controlled). Supplementary Service Specific Parameters Maximum rate for updating of charging information. Semce Activation/Deactivation S (Specified period): when service is provided on a subscription basis. CC (Call
25、by Call): when service is generally available. Means of Specified Period Activation/Deactivation N (Network controlled). Edition of January 15, 1988 TIS F 31 -07 E Annex 1, PaQe 5 9.5. Means of Parameters Registration, Interrogation and Modification N (Network controlled). 9.6. Means of Service Invo
26、cation N (Network invocation): when service is provided on a subscription basis. L (User invocation, local) : when service is generally available. 9.7. Applicability to Telecommunication Services All (all Telecommunication services). 9.8. . Charging S (Subscription based) or U (Usage based). O Editi
27、on of January 15, 1988 CEPT T/SF*lL-O*E * m 2326414 0009246 T m 1. 2. 2.1. 2.1.1. 2.1.2. 2.1.3. 2.1.4. 2.2. 2.3. T/SF 31 -07 E Annex 2, Page 1 Annex 2 CALL WAITING DEFINITION The possibility for a customer to be notified of an incoming call whilst his termination is in the busy state. Subsequently t
28、he customer can either answer the incoming call, reject or ignore the call. DESCRIPTION Description This service operates when the controlling customer Bs termination is in the busy state which is defined as the condition when both B Channels are engaged. Also, it is recognised that a small call con
29、nect system or active bus may be present at the customers premises (as an NT2) and that an internal call may be in progress when the call waiting indication is applied. It is felt that it is the responsibility of the intelligence of the customers equipment to determine what action should take place
30、in these circumstances. When a third party (calling customer C) attempts to connect to that termination the controlling customer B is given an appropriate indication of the waiting call. Note. If it can be identified that the incoming call is Telephony and that one of existing calls is Telephony the
31、n the presentation of this indication may take the form of an in-channel indication. In order to simplify the service management in the first phase, both for the network and for the subscriber, the maximum number of waiting calls at one time per subscriber line can be one. This means that no further
32、 calls are forwarded to the subscriber during the call waiting state. Applicability to Telecommunication Services This service is applicable to the following Services: (a) Telephony Teleservice, (b) 64 kbit/s 8 kHz structured 3.1 kHz Audio Bearer Service, (c) 64 kbit/s 8 kHz structured Speech Bearer
33、 Service, or (d) applicable to other services where there is a human attendant. This is not seen as an immediate requirement, but provision shouId be made in the signalling protocols to accommodate such a requirement. Terminology Call Waiting State The call waiting state, as seen by the network, can
34、 be defined as the time between tl and t2, where: tl = a call waiting indication is sent to the controlling subscriber; t2 = the waiting call is cleared (either the calling party has cleared or a time out has expired in the network); Line States In the light of handling the waiting calls in the same
35、 way as ordinary calls, signalling messages and tones are sent towards the calling party according to the following controlling customers line state, as perceived by the network: - free, when at least one B Channel is free or when both B Channels are busy but the subscriber is able to connect a wait
36、ing call, i.e. at least one busy terminal reacts to a call waiting indication; - busy, when both B Channels are busy and the subscriber is not able to connect a waiting call, i.e. either the busy terminals are not compatible with the waiting call or the line is already in the call waiting state. or
37、the waiting call is connected. Edition of January 15, 1988 CEPT T/SF*33-07*E * H 2326434 0009247 3 = T/SF 31 -07 E Annex 2, Page 2 3. 3.1. 3.2. 3.3. 3.4. 3.5. 3.6. 3.7. 3.8. 3.8.1. 3.8.2. 3.8.3. NORMAL PROCEDURES WITH SUCCESSFUL OUTCOME Provision This service may be provided by prior arrangement wit
38、h the Administration or be available on a general basis. Withdrawal Withdrawal will be at the request of the customer or for administrative reasons. Note. Activation, Deactivation, Interrogation can be provided locally, Le. by the terminals. In addition, these facilities may be provided by the netwo
39、rk, in which case paragraphs 3.5. 3.6., 3.11. apply. Where control capabilities are provided in the network the Administration shall have the same control capabilities as the controlling customer, for instance to register and/or activate the supplementary service on the customers behalf. Registratio
40、n No information needs to be registered with the network for this supplementary service. Erasure Not applicable to this supplementary service. Activation Activation of this supplementary service will be by the user using an appropriate control procedure. The controlling user shall be informed by the
41、 network of the success or otherwise of his action. Information exchanged: Service Activation request and acknowledgment. (1) Normal outgoing call procedures apply when this service is activated. Deactivation The service will be deactivated by the user using an appropriate control procedure. The con
42、trolling user shall be informed by the network of the success or otherwise of his action. Information exchanged: Service Deactivation request and acknowledgment. (1) Invocation This service is invoked by the network on arrival of an incoming call if the controlling customer Bs termination is in the
43、busy state. Normal Operation with successful outcome On arrival of an incoming call whilst the controlling customer Bs termination is in the busy state, an appropriate indication will be given to all appropriate compatible terminals on that termination. When this service is in the active state and t
44、he termination of the controlling customer B is busy, the arrival of a subsequent incoming call to customer B shall be indicated to B by an appropriate indication. The calling customer C shall also receive an appropriate indication. As a basic feature, the calling customer C receives the information
45、 (signalling messages and tones) as for an ordinary call. Additional features (specific information to the user) can be provided on a national basis. The network shall then await a response from controlling customer B within a specific time period ranging from 30 seconds to 3 minutes in steps of not
46、 more than 30 seconds. The call waiting service is then suspended for further incoming calls. The calling customer C shall be kept informed of the state of his call attempt to the controlling customer B. If a compatible terminal accepts the waiting call, by the use of one of the allowed control proc
47、edures, within a specified period (see 3.8.2.) the network shall respond with the corresponding action from the following: i) Release the existing call and answer the waiting call. ii) Put the existing call on hold and answer the waiting call. r -a Edition of January 15, 1988 CEPT T/SF*3L-O7*E * m 2
48、32b4L4 0007248 3 m 3.8.4. 3.8.5. 3.8.6. 3.9. 3.10. 3.11. 3.12. 3.12.1, 3.12.2. 4. 4.1. 4.1.1. 4.1.2. 4.2. 4.3. TIS F 31 -07 E Annex 2, Page 3 If the controlling customer B responds with an appropriate control procedure within the time period detailed in paragraph 3.8.2. to indicate that he accepts t
49、he waiting call and wishes to place the existing call with party A on hold, the network shall remove any indication to the controlling customer B if provided. The existing call between customers B and A shall be placed on hold with customer A receiving a suitable indication, and the waiting call from customer C set up to customer B. If the controlling customer B responds with an appropriate control procedure within the time period detailed in paragraph 3.8.2. to indicate that he accepts the waiting call and wishes to release the existing call with party A, th
