1、CCITT RECMN*I*L22 93 4862591 0580208 846 INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU INTEGRATED SERVICES DIGITAL NETWORK (ISDN) GENERAL STRUCTURE 1.1 22 (03/93) FRAMEWORK FOR FRAME MODE BEARER SERVICES ITU-T Recommendation 1.1 22 (Previously “CCIlT Rec
2、ommendation”) CCITT RECMN*I.L22 93 E 4,362591 0580209 7,312 m FOREWORD The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the International Telecom- munication Union. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendat
3、ions on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, established the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. IT
4、U-T Recommendation 1.122 was revised by the IT-T Study Group XVIII (1988-1993) and was approved by the WTSC (Helsinki, March 1-12, 1993). NOTES 1 As a consequence of a reform process within the International Telecommunication Union (ITU), the CCIT ceased to exist as of 28 Febmuy 1993. In its place,
5、the ITU Telecommunication Standardization Sector (ITU-T) was created as of 1 March 1993. Similarly, in this reform process, the CCIR and the IFRB have been replaced by the Radiocommunication Sector. In order not to delay publication of this Recommendation, no change has been made in the text to refe
6、rences containing the acronyms “CCITT, CCIR or IFRB” or their associated entities such as Plenary Assembly, Secretariat, etc. Future editions of this Recommendation will contain the proper terminology related to the new U structure. 2 telecommunication administration and a recognized operating agenc
7、y. In this Recommendation, the expression “Administration” is used for conciseness to indicate both a O ITU 1993 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permiss
8、ion in writing from the ITU. CCITT RECMN*I.122 93 4862591 0580210 4T4 Recommendation 1.122 FRAMEWORK FOR FRAME MODE BEARER SERVICES (Melbourne, 1988; revised at Helsinki, 1993) The work on FMBS has progressed in 1988-1992 to provide a number of Recommendations which supersede the information formerl
9、y included in the BZue Book version of Recommendation 1.122. These Recommendations are: - Rec.I.233 Frame Mode Bearer Services; - RW. 1.233.1 ISDN Frame Relaying Bearer Service; - Rw. 1.233.2 ISDN Frame Switching Bearer Service; - Rw.I.370 - Rec.I.372 Frame Relaying Bearer Service Network-to-Network
10、 Interface Requirements; - Rec.Q.922 - Rec.Q.933 - Rec.V.120 Congestion Management for the ISDN Frame Relaying Bearer Service; ISDN Data Link Layer Specification for Frame Mode Bearer Services; Layer 3 Signalling Specifcation for Frame Mode Bearer Services; Support by an ISDN of Data Terminal Equipment with V-Series type Interfam with Provision for Statistical Multiplexing. Additional Recommendations are planned including FMBS Interworking Requirements due for completion in 1993. Recommendation 1.122 (03/92) 1 CCITT RECMN*I.L22 93 48b2571 0580212 330 E Printed in Switzerland Geneva, 1993
