1、ITU-T RECMN*E*LOS 95 4862593 Ob00LL8 4b8 INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMU N KATION STANDARDIZATION SECTOR OF ITU TELEPHONE NETWORK AND ISDN OPERATION, NUMBERING, ROUTING AND MOBILE SERVICE E.1 O9 (02/95) INTERNATIONAL BILLED NUMBER SCREENING PROCEDURES FOR COLLECT AND THIRD-PART
2、Y CALLING ITU-T Recommendation E.1 O9 (Previously “CCITT Recommendation”) - ITU-T RECNN*E-LOS 95 4862593 ObOOLL9 3T4 FOREWORD The IT-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (ITU). The IT-T is responsible for studying technical, o
3、perating and tariff questions and issuing Recommen- dations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in
4、their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsinki, March 1-12, 1993). ITU-T Recommendation E.109 was prepared by ITU-T Study Group 1 (1993-1996) and was approved un
5、der the WTSC Resolution No. 1 procedure on the 21st of February 1995. NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. O ITU 1995 All rights reserved. No part of this publicatio
6、n may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. CONTENTS Page Preamble . 1 Definitions 1 BNS messages 1 3.1 Authorization Request components 2 3.2 Request Response components . 3
7、3.3 Call Disposition components (optional) . 3 Recommendation E.109 (02/95) I SUMMARY Billed Number Screening messages may be used for determining the validity of billing calls to a telephone number on collect and third-party calls, and any conditions related to the acceptance of charges by the bill
8、ed party. Information on such conditions would be stored within a Billed Number Screening system, most likely within a database. This Recommendation describes information used within the Billed Number Screening process at a conceptual level and makes no attempt to specify any equipment, facilities a
9、nd data transmission techniques. In addition, the use of systems and networks also involve service agreements between ROAS; these agreements are beyond the scope of this Recommendation. It should be noted that future technological developments may allow operator service functions to be automated (e.
10、g. using voice recognition); this Recommendation is not reliant on, nor does it preclude, that automation. 11 Recommendation E.109 (02/95) ITU-T RECMN*E*109 95 4862573 Ob00L22 979 Recommendation E.109 INTERNATIONAL BILLED NUMBER SCREENING PROCEDURES FOR COLLECT AND THIRD-PARTY CALLING (Geneva, 1994)
11、 1 Preamble Recognized Operating Agencies (ROAs) are currently building, or planning to build, signalling interfaces for card validation as described by Recommendation E.113. These signalling interfaces could also be used to improve detection of attempts to charge telecommunication services to publi
12、c telephones in place of, or as a supplement to, the payphone recognition tone described in Recommendation E.180. Use of these interfaces could also allow ROAs to offer optional billing features to customers who do not want collect or bill-to-third party calls charged to their accounts. Where the bi
13、lled party has not expressly requested the call denial feature, the operator must ask the billed party to accept billing for the collect call or the call between the two other parties. Billed Number Screening messages may be used for determining the validity of billing calls to a telephone number on
14、 collect and third-party calls, and any conditions related to the acceptance of charges by the billed party. Information on such conditions would be stored within a Billed Number Screening system, most likely within a database. This Recommendation describes information used within the Billed Number
15、Screening process at a conceptual level and makes no attempt to specify any equipment, facilities and data transmission techniques. In addition, the use of systems and networks also involve service agreements between ROAs; these agreements are beyond the scope of this Recommendation. It should be no
16、ted that future technological developments may allow operator service functions to be automated (e.g. using voice recognition); this Recommendation is not reliant on, nor does it preclude, that automation. 2 Definitions For the purposes of this Recommendation, the following definitions apply: 2.1 th
17、ird party calls. Billed Number Screening (BNS): The authorization of billing to a telephone number for collect and bill-to- 2.2 billed number screening system: The system containing the database to be used to house BNS information. 2.3 operator for payment of telecommunication services. end user: Th
18、e person requesting the telecommunication service and presenting billing information to the 2.4 optional: This information may or may not be present depending on service agreements between ROAs. 2.5 recording the details of the call. operator services provider: The ROA accepting the billing informat
19、ion, initiating the screening process and 2.6 required: The information must be present and used on all screening messages. 2.7 origination. telecommunication services provider: The ROA providing telecommunication transport at the point of call 3 BNS messages The information flow consists of three m
20、essages: the Authorization Request (required), the Request Response (required), and the Call Disposition (optional). The Authorization Request is a message from the operator services provider to the system containing information necessary to screen the billing option being presented by the end user.
21、 The BNS system Recommendation E.109 (02/95) 1 then returns a Request Response message containing information necessary for the operator services provider to complete the processing of the call. The Call Disposition message may be sent by the operator services provider to the BNS system after the ca
22、ll attempt, at intervals during the call, or at the end of the call; an important purpose of this additional message is to provide, on a timely basis, further protection against potential fraudulent use of the billing system. For Call Disposition messages sent at intervals during a call in progress,
23、 a new Request Response message is required to provide direction to the operator services provider on the possible continuance (or termination) of the call (see Figure I). Operator senices provider Billed number screening system Call Disposition (Intermediate) FIGURE 1E.109 Intermediate cai1 disposi
24、tion message with matching request response messages The following subclauses describe the information components of each of these messages. 3.1 Authorization Request components 3.1.1 Message Type (required) - This component identifies the message as the Authorization Request message. 3.1.2 of a spe
25、cific screening transaction. Message Reference (required) - This component shall provide a unique number to establish the identification 3.1.3 shall be “collect” and “bill-to-third party” calls. Call Type (required) - This component shall identify the type of call being attempted. Identified call ty
26、pes 3.1.4 station or account to which charges are to be accrued. Billed Number (required) - This component identifies the billed number. The billed number shall identify the 2 Recommendation E.109 (OW95) ITU-T RECMN*E-LOS 95 = 4862593 Ob00324 763 m 3.1.5 Billed Number. The range of values to be enco
27、ded should take into account international numbering plans such as: Billed Number Numbering Plan (required) - This component identifies the numbering plan associated with the - - - - 3.1.6 Operator Services Provider (required) - This component identifies the ROA sending the Authorization Request. 3.
28、1.7 Telecommunication Services Provider (optional) - This component identifies the ROA providing telecommunication transport at the point of call origination. TelephonyDSDN Numbering Plan (see Recommendation E. 164); Data Numbering Plan (see Recommendation X. 121); Maritime Mobile Numbering Plan (se
29、e Recommendation E.215); Land Mobile Numbering Pan (see Recommendation E.212). 3.2 Request Response components 3.2.1 Message Type (required) - This component identifies the message as the Request Response message. 3.2.2 Message Reference (required) - This component shall relate this message as part
30、of a specific screening transaction. It provides closure between the Authorization Request and the Request Response. 3.2.3 Call Type (required) - This component shall identify the type of call being attempted. Identified call types shall be “collect” and “bill-to-third party” calls.) 3.2.4 Billed Nu
31、mber (required) - This component identifies the billed number. The billed number shall identify the station or account to which charges are to be accrued. It provides supplemental closure between the Authorization Request and the Request Response. 3.2.5 Response Code (required) - This component indi
32、cates the result of processing the Authorization Request within the BNS system. Specific definitions and their corresponding codes are left for further study. Possible conditions for responses include: - service approved; - - - service denied, public telephone; - - - error in message format; - - ver
33、bal acceptance required; - terminate call in progress. service denied, no service agreement; service denied, collect calls not accepted; service denied, bill-to-third party calls not accepted; service denied, call not permitted from station; message type not processable due to missing or incomplete
34、information; 3.3 Call Disposition components (optional) 3.3.1 Message Type (required) - This component identifies the message type as the Call Disposition message. 3.3.2 Message Reference (required) - This component contains the message reference identification. Its purpose is to uniquely relate thi
35、s message as part of a specific screening transaction. The message reference number provides supplemental closure between the Authorization Request and the Cali Disposition messages. ) Message reference numbers for telecommunications charge card calls may be created by a random number generator, whi
36、le those for collect/bill-to-third calls may be created by a separate random number generator. It is therefore conceivable that two calls of different types could simultaneously be assigned identical Message Reference Numbers. Care should be taken to ensure that these types of transactions can be un
37、iquely identified and distinguished. Recommendation E.109 (02/95) 3 ITU-T RECMN*E.LO 95 4662591 Ob00125 bT8 3.3.3 Call Type (required) - This component identifies the type of call attempted. Identified call types shall be “collect” and “bill-to-third party” calls. 3.3.4 Billed Number (required) - Th
38、is component is provided here for supplemental closure between the Authorization Request and the Call Disposition. For collect and bill-to-third party screening transactions, the billed number shall identify the station or account to which charges are to be accrued. 3.3.5 Cali Disposition Code (requ
39、ired) - This component contains information specifying the disposition of the call: to indicate whether and how the call was completed or uncompleted. Specific definitions and their corresponding codes are left for further study. Possible results include: - - - - - collect call refused; - bill-to-th
40、ird party call refused; - unrateable. Call Start Time (required2) - This component contains the date and time at which the call started. The Cali End Time (required3) - This component contains the date and time at which the call ended. The Estimated Call Charge (optional) - This component contains t
41、he estimated call charge in Special Drawing Call Disposition Message Indicator (optional) - This component specifies whether the Call Disposition collect call (station or person); bill-to-third party call within the country of origin (station or person); bill-to-third party call to country of billed
42、 party (station or person); bill-to-third party call to third country (station or person); 3.3.6 information shall contain the month, day, hour, minute and second in Coordinated Universal Time (UTC). 3.3.7 information shall contain the month, day, hour, minute and second in Coordinated Universal Tim
43、e (UTC). 3.3.8 Rights (SDRs). 3.3.9 message is being sent at the end of the call or at intervals during the call. 2, If the collect call or bill-to-third party call is refused, Call Start Time and Call End Time (see 3.3.7) are not sent. 3, If this Call Disposition message is sent as an intermediate message, the Call End Time is null. 4 Recommendation E.109 (OW95)
