1、CCITT RECMN*I-256- 3 92 4862591 057ll777 5T9 INTERNATIONAL TELECOMMUNICATION UNION CCITT THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE INTEGRATED SERVICES DIGITAL NETWORK (ISDN) GENERAL STRUCTURE AND SERVICE CAPABILITIES 1.256.3 (08/92) REVERSE CHARGING Recommendation 1.256.3 Gene
2、va, 1992 CCITT RECflN*I=256- 3 92 m 48b257L 0574778 435 m INTERNATIONAL TELECOMMUNICATION UNION CCITT THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE 1.256.3 (08/92) INTEGRATED SERVICES DIGITAL NETWORK (ISDN) GENERAL STRUCTURE AND SERVICE CA PA BI LITI ES REVERSE CHARGING Recommenda
3、tion 1.256.3 Geneva, 1992 CCITT RECMN*I*25b- 3 92 4Bb2591 0574779 371 FOREWORD The CClT (the International Telegraph and Telephone Consultative Committee) is a permanent organ of the International Telecommunication Union O. CCI“ is responsible for studying technical, operating and tariff questions a
4、nd issuing Reqmmendations on them with a view to standardizing telecommunicatiOns on a worldwide basis. The Plenary Assembly of CC which meets every four years, establishes the topics for study and approves Recommendations prepared by its Study Groups. The approval of Recommendations by the members
5、of CCm between Plenary Assemblies is covered by the procedure hid down in CCI“ Resolution No. 2 (Melbourne, 1988). Recommendation 1.256.3 was prepared by Shidy Group I and was approved under the Resolution No. 2 procedure on the 4th of August 1992. In this Recommendation, the expression “Administrat
6、ion“ is used. for conciseness tq indicate both a telecommunication Administration and a recognized private agency. . -_. 1 , . ,# . . . s L , o ITU 1992 Ail rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including pho
7、tocopying and microfilm, Without permission in writing hm the ITU. CCITT RECMN*I-25b= 3 92 48b259L 0574780 093 Recommendation 1256.3 REVERSE CHARGING (1992) 1 Definition Reverse Charging (REV) is a supplementary service allowing the served (called) user to be charged for the entire call or part of t
8、he cail. Ooly usage-based charges can be charged to the called user. There are four cases of reverse charging: a) reverse charging requested by the calling user at call Set-up time; b) reverse charging for the rest of the call, requested by the calling user or the called user during the active phase
9、 of the call; c) reverse charging for the entire call requested by the called user during the active phase of the call; d) reverse charging unconditional. Note - The calling user should not be provided with a bearer capability until the options of charging, either normal or reversed have been resolv
10、ed. 2 Description 2.1 General description 2.1.1 CuseA This supplementary service allows a calling user, on a per-call basis, to request reverse charging at call When a calling user does not explicitly request reverse charging, the calling user is charged as normal. In order to use this service, the
11、originating terminal needs to have the capability for requesting reverse Set-up time and the called user to accept or reject the charges. charging. 2.1.2 Cuse B Request by the caiiing user: This supplementary service allows a calling user, during the active phase of the cali, to request reverse char
12、ging for the rest of the call. The called user can accept or reject this request. charging. In order to use this service, the originating terminal needs to have the capability for requesting reverse Request by the culled user: This supplementary service allows a called user, during the active phase
13、of the cail, to request reverse charging for the rest of the call. 2.1.3 Case C This supplementary service allows a called user, before disconnection of the call, to request reverse charging for the entire cail. When a called user does not explicitly request reverse charging, the calling user is cha
14、rged as normal. With this service the usage-based charges for the entire call are charged to the called user. Recommendation 1.2563 (08/92) 1 This supplementary service aliows the caiied user to be charged for a incoming calls, or ali incoming calls for a predefined set of basic services. No user re
15、quest is required. 2.2 Specijc terminology None. 2.3 Qualijcations on the applicability to telecommunications services This service is applicable to all telecommunication services. 3 Procedures 3.1 Provisiorwithdrawal The provision of one or more of the cases A-D is a network option. Since this serv
16、ice is made available to the called user, the calling user does not need to subscribe to this service. This service provides the following subscription options: i) called users subscription; ii) no subscription. This means that reverse charging constitutes a fundamental ISDN service. Cali-by-call re
17、verse charging and unconditional reverse charging are performed under the following conditions: a) b) call-by-call reverse charging (cases A-C). Selection of option i) or ii) is a network ma-, , , unconditionai reverse charging. only option i) should be provided because the ca reverse charging in th
18、is case. in the case of reverse charging unconditional, as B subscription option this supplementaryservice can be provided for aii basic services, or for a set of basic services. At the discretion of network providers, this service may be offered on an ISDN number basis. 3.2 Normal procedures 3.2.1 ActivatoMdeactivutiorregistratian Tbe REV supplementary service sbail be activated on proVision and deactivated un withhwai .- Wo i! a U I II n m i o Recommendation 1.2563 (0892) 10
