1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T Q.733.3 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1 (07/2001) SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7 ISDN supplementary services Stage 3 description for call completion supplementary services using Sig
2、nalling System No. 7: Completion of calls to busy subscriber (CCBS) Amendment 1 ITU-T Recommendation Q.733.3 Amendment 1 (Formerly CCITT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC AND SEMI-AUTO
3、MATIC WORKING Q.4Q.59 FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN Q.60Q.99 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.100Q.119 SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 Q.120Q.249 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 Q.250Q.309 SPECIFICATIONS OF SIGNALLING SYSTEM R1
4、Q.310Q.399 SPECIFICATIONS OF SIGNALLING SYSTEM R2 Q.400Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLING SYSTEMS Q.600Q.699 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700Q.799 General Q.700 Message transfer part (MTP) Q.701Q.709 Signalling connection control part (SCCP) Q.711Q.719 Telep
5、hone user part (TUP) Q.720Q.729 ISDN supplementary services Q.730Q.739 Data user part Q.740Q.749 Signalling System No. 7 management Q.750Q.759 ISDN user part Q.760Q.769 Transaction capabilities application part Q.770Q.779 Test specification Q.780Q.799 Q3 INTERFACE Q.800Q.849 DIGITAL SUBSCRIBER SIGNA
6、LLING SYSTEM No. 1 Q.850Q.999 PUBLIC LAND MOBILE NETWORK Q.1000Q.1099 INTERWORKING WITH SATELLITE MOBILE SYSTEMS Q.1100Q.1199 INTELLIGENT NETWORK Q.1200Q.1699 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 Q.1700Q.1799 SPECIFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL (BICC
7、) Q.1900Q.1999 BROADBAND ISDN Q.2000Q.2999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Q.733.3/Amd.1 (07/2001) i ITU-T Recommendation Q.733.3 Stage 3 description for call completion supplementary services using Signalling System No. 7: Completion of calls to busy su
8、bscriber (CCBS) AMENDMENT 1 Summary This amendment contains the modifications to ITU-T Q.733.3 in order to accommodate changes being made to the CCBS supplementary service dealing with CCBS/CFNR interactions at a diverting exchange and the inclusion of the Additional Called Party Number parameter fo
9、r CCBS (used to transfer the private called party number in the CCBS request linked to a VPN call). Source Amendment 1 to ITU-T Recommendation Q.733.3 was prepared by ITU-T Study Group 11 (2001-2004) and approved under the WTSA Resolution 1 procedure on 13 July 2001. ii ITU-T Q.733.3/Amd.1 (07/2001)
10、 FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and
11、 issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on thes
12、e topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expre
13、ssion “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intell
14、ectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not receive
15、d notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2002 All rights reserved. N
16、o part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from ITU. ITU-T Q.733.3/Amd.1 (07/2001) iii CONTENTS Page 1) Table 3-1/Q.733.3 Definition of operations for the CCBS sup
17、plementary service. 1 2) Clause 3.5.1.1.1.1 2 3) Clause 3.6.10.2.2 a) 2 4) Clause 3.7.7.2.1.1 3 ITU-T Q.733.3/Amd.1 (07/2001) 1 ITU-T Recommendation Q.733.3 Stage 3 description for call completion supplementary services using Signalling System No. 7: Completion of calls to busy subscriber (CCBS) AME
18、NDMENT 1 The following new or revised text should be added to the present Recommendation. 1) Table 3-1/Q.733.3 Definition of operations for the CCBS supplementary service Replace the complete table with the following (changes denoted by revision marks): CCBS-Protocol itu-t recommendation q 733 3 mod
19、ules(2) operations-and-errors(1) version1version2 (12)DEFINITIONS EXPLICIT TAGS:=BEGINIMPORTSOPERATION, ERRORFROM TCAPMessages ccitt recommendation q 773 moduleA(0);- operations typesCcbsRequest:= OPERATIONPARAMETER SEQUENCEcalledPartyNumber CalledPartyNumber,retainSupported BOOLEAN DEFAULT FALSE,us
20、erServiceInf 1 IMPLICIT USICode OPTIONAL,callingPartyNumber 2 IMPLICIT CallingPartyNumberOPTIONAL,userServiceInfPrime 3 IMPLICIT USICode OPTIONAL,accessTransportParameter 4 IMPLICIT AccessTransportOPTIONAL,.,additionalCalledPartyNumber 5 IMPLICITAdditionalCalledPartyNumberOPTIONALRESULT SEQUENCEreta
21、inSupported BOOLEAN DEFAULT FALSE,.ERRORS ShortTermDenial,LongTermDenial- Timer T = CCBS-T2CcbsCancel := OPERATIONPARAMETERcancelCause CauseCode- the cancelCause parameter is optional- and may not be sent in certain circumstancesCcbsSuspend := OPERATIONCcbsResume := OPERATIONRemoteUserFree := OPERAT
22、ION-error type definitionsShortTermDenial := ERRORLongTermDenial := ERROR-constants and data type definitionsCalledPartyNumber := OCTET STRING (SIZE (110)- the calling party number is coded as described- in itu-t recommendation q763CallingPartyNumber := OCTET STRING (SIZE (110)- the calling party nu
23、mber is coded as described- in itu-t recommendation q7632 ITU-T Q.733.3/Amd.1 (07/2001) CauseCode := ENUMERATEDcCBS-T3-Timeout (1),cCBS-T4-Timeout (2),cCBS-T7-Timeout (3),cCBS-T9-Timeout (4)USICode := OCTET STRING (SIZE (111)- the USICode is coded as described in itu-t recommendation q763AccessTrans
24、port := OCTET STRING (SIZE (1maxAccessTransportLength)- the ATP is used to carry HLC, LLC, Calling Party SUB and- Called Party SUB as described in ccitt recommendation q931AdditionalCalledPartyNumber := OCTET STRING (SIZE (111)- the AdditionalCalledPartyNumber is coded as the Generic Number paramete
25、r- (with Number qualifier indicator set to “additional called number“)- described in itu-t recommendation q763maxAccessTransportLength INTEGER:=255- object identifier pathccbsOID OBJECT IDENTIFIER := itu-t recommendation q 733 3 operations-and-errors(1)- operation valuesccbsRequest CcbsRequest := gl
26、obalValue:ccbsOID ccbsrequest(1)ccbsCancel CcbsCancel := globalValue:ccbsOID ccbscancel(2)ccbsSuspend CcbsSuspend := globalValue:ccbsOID ccbssuspend(3)ccbsResume CcbsResume := globalValue:ccbsOID ccbsresume(4)remoteUserFree RemoteUserFree := globalValue:ccbsOID remoteuserfree(5)- error valuesshortTe
27、rmDenial ShortTermDenial := globalValue:ccbsOID shorttermdenial(6)longTermDenial LongTermDenial := globalValue:ccbsOID longtermdenial(7)END - of CCBS Protocol2) Clause 3.5.1.1.1.1 Insert the following new list item before The TC-INVOKE primitive shall instruct the TC to start the CCBS request timer
28、CCBS-T2: The Additional Called Party Number parameter shall be included, if available. 3) Clause 3.6.10.2.2 a) Replace the complete text with the following (changes denoted by revision marks): 3.6.10.2.2 Destination local exchange (B) a) Call forwarding is (are) already activated on receipt of a CCB
29、S request. On receipt of a CCBS request: if destination B has a CFU activated, the destination Bs local exchange rejects the CCBS request with short-term denial as the reason (see 3.5.5.4.1 c). If any other call diversion is activated in addition to CFU, the result should be the same; if destination
30、 B has only a CFB activated, destination Bs local exchange accepts the CCBS request; if destination B has CFNR activated (with or without a CFB in addition), destination Bs local exchange shall reject the CCBS request with short term denial as the reason see 3.5.5.4.1 c)accept the CCBS request if de
31、stination B is busy and shall reject the CCBS request if destination B is free. NOTE A local exchange is not aware of the activation of any call deflection. Consequently, a CCBS request is always accepted by the local exchange of such a user. ITU-T Q.733.3/Amd.1 (07/2001) 3 Insert the following new
32、item d) at the end of the clause: d) Call diversion is invoked at destination B. On receipt of a release message with cause parameter containing value #17 or #34 (regardless of the value of the CCBS indicator in the diagnostic field): if the reason for the call diversion is CFU or CFNR or CD, the di
33、agnostic field is changed to a “CCBS not possible“ indication; if the reason for the call diversion is CFB, the diagnostic field is changed to indicate whether or not CCBS is possible. If CCBS is not possible, e.g. if destination Bs local exchange knows that destination Bs CCBS queue is set to zero,
34、 then the diagnostic field shall be set to “CCBS not possible“ otherwise the diagnostic field shall be set to “CCBS possible“. 4) Clause 3.7.7.2.1.1 Replace the complete text with the following (changes denoted by revision marks): 3.7.7.2.1.1 Activation The “retainSupported“ is coded TRUE, in the CC
35、BS request, by the originating local exchange only if received from user A. This information shall be sent to the ISPBX by the destination local exchange, and the “retainSupported“ in the CCBS request return result is coded TRUE only if received from user B (if B ISPBX). If available, the OLE shall
36、send the additional called party number to the destination local exchange in the CCBS request. If received by the DLE in the CCBS request, the additional called party number (optional parameter) is forwarded towards the private network B. If received by the destination local exchange in the CCBS req
37、uest, the CLI optional parameter is forwarded towards the private network B in order to allow interworking with existing private networks using CLI in a linkage mechanism. The destination local exchange shall start the supervision timer Tsup on sending the CCBS request to the private network. The or
38、iginating local exchange shall start the supervision timer Tsup on receipt of a successful service activation indication. Printed in Switzerland Geneva, 2002 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series B Means of expression: definitions, symbols, classification
39、Series C General telecommunication statistics Series D General tariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H
40、 Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cables and other elemen
41、ts of outside plant Series M TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P
42、 Telephone transmission quality, telephone installations, local line networks Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks and open system communications Series Y Global information infrastructure and Internet protocol aspects Series Z Languages and general software aspects for telecommunication systems
