1、INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU 1.31 I Amendment 1 (03/2000) SERIES I: INTEGRATED SERVICES DIGITAL NETWORK Overall network aspects and functions - Network functional principles B-ISDN general network aspects Amendment I ITU-T Recommendation
2、 1.311 - Amendment I (Formerly CCITT Recommendation) ITU-T I-SERIES RECOMMENDATIONS INTEGRATED SERVICES DIGITAL NETWORK STD*ITU-T RECMN 1.311 AMEND*L-ENGL 2000 VAL2571 ObBb113b 775 I For further details, please refer to the list of ITU-T Recommendations. JENERAL STRUCTURE Terminology Description of
3、ISDNs General modelling methods Telecommunication network and service attributes General description of asynchronous transfer mode Scope General aspects of services in ISDN Common aspects of services in the ISDN Bearer services supported by an ISDN Teleservices supported by an ISDN Supplementary ser
4、vices in ISDN Network functional principles Reference models Numbering, addressing and routing Connection types Performance objectives Protocol layer requirements General network requirements and functions Application of I-series Recommendations to ISDN user-network interfaces Layer 1 Recommendation
5、s Layer 2 Recommendations Layer 3 Recommendations Multiplexing, rate adaption and support of existing interfaces Aspects of ISDN affecting terminal requirements SERVICE CAPABILITIES OVERALL NETWORK ASPECTS AND FUNCTIONS ISDN USER-NETWORK INTERFACES INTERNETWORK INTERFACES MAINTENANCE PRINCIPLES B-IS
6、DN EQUIPMENT ASPECTS ATM equipment Transport functions Management of ATM equipment Multiplexing aspects I. 1 10-1.1 19 1.120-1.1 29 1.130-1.139 I. 140-1.149 I. 150-1.199 1.200-1.209 1.2 10-1.2 19 1.220-1.229 1.230-1.239 I. 240-1.249 1.250-1.299 1.310-1.319 1.320-1.329 1.330-1.339 I. 340-1.349 1.3 50
7、-1.3 59 2.360-1.369 1.370-1.399 1.420-1.429 1.430-1.439 1.440-1.449 1.450-1.459 1.460-1.469 1.470-1.499 1.500-1.599 1.600-1.699 1.730-1.739 1.740-1.749 1.750-1.759 I.76kI.769 B-ISDN general network aspects AMENDMENT 1 Summary The amendment to subclause 5.3.1.1 will add the ATM transfer capability. S
8、ource Amendment 1 to ITU-T Recommendation 1.311 was prepared by ITU-T Study Group 13 (1997-2000) and approved under the WTSC Resolution 1 procedure on 10 March 2000. ITU-T 1.31 VAmd.1 (03/2000) i FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the
9、 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 issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. Th
10、e World Telecommunication Standardization Conference (WTSC), which meets every 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 Resolutio
11、n 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and
12、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 Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of clai
13、med Intellectual Property Rights, whether asserted by IT members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recomme
14、ndation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. I O ITU 2001 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or
15、mechanical, including photocopying and microfilm, without permission in writing from ITU. ITU-T 1.31 UAmd.1 (03/2000) 11 ITU-T Recommendation 1.311 B-ISDN general network aspects AMENDEMENT 1 1) Subclause 5.3.1.1 Add the following text after the last paragraph of section 5.3. I. I. ATM transfer capa
16、bility Signalling VCs are used on access lines, intra-network and inter-network trunks. Signalling protocols are sensitive to delay and message loss. Due to different commercial and technical relationships like customerdnehvork provider or network providednetwork provider, different requirements for
17、 bandwidth and transfer capability parameter value for signalling VC occur. a) Signalling virtual channels used on access lines The user should have the possibility to select the bandwidth and transfer capability parameter value within the range of capability by the operator. Then, DBR according to
18、-T Recommendation 1.371 is preferred to ATM transfer capability. These parameter values are created in the exchange via management function by the operator. The other possibility of ATM transfer capabilities is for further study. Signalling virtual channels used intra-network trunks To fulfil the en
19、d-to-end performance according to ITU-T Recommendation 1.356, signalling VC should belong to QoS class 1. Also the connection establishment delay should not be delayed unnecessary by the signalling VC capability, so the transfer capability DBR shall be used. The bandwidth depends on the engineering
20、methods of the network provider. The traffic parameter values are created in the exchange via management function by the operator. Signalling virtual channels used on the inter-network trunks To ensure end-to-end performance objectives also the transfer capability DBR shall be used on this network s
21、ection. The bandwidth depends on the engineering methods of the adjacent network providers and has to be negotiated. The traffic parameter values are created in the exchange via management function by the operator. b) c) ITU-T I.31UAmd.l (03/2000) 1 jeries A Series B jeries C Series D Series E Serie
22、s F Series G Series H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z ITU-T RECOMMENDATIONS SERIES Organization of the work of the ITU-T Means of expression: definitions, symbols, classification
23、General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated service
24、s digital network Transmission of television, sound programme and other multimedia signals Protection against interference Construction, installation and protection of cables and other elements of outside plant TMN and network maintenance: international transmission systems, telephone circuits teleg
25、raphy, facsimile and leased circuits Maintenance: intemational sound programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and signalling Telegraph transmission Telegraph services te
26、rminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communications Global information infrastructure and Internet protocol aspects Languages and general software aspects for telecommunication systems Printed in Switzerland Geneva, 2001
