1、 STD=TTU-T RECMN H.34L-ENGL 3999 4862573 Ob7L7b5 T4 INTERNATIONAL TELECOMMUNICATION UN ION ITU-T TELECOMMUNICATION STAN DARD IZATION SECTOR OF ITU H.341 (05/99) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services - Systems and terminal equipment for audiovisual servic
2、es Multimedia management information base ITU-T Recommendation H.341 (Previously CCITT Recommendation) STDeITU-T RECMN H.34L-ENGL Lqqq 11151 4862593 O673766 9TO BII ITU-T H-SERIES RECOMMENDATIONS AUDIOVISUAL AND MULTIMEDIA SYSTEMS Characteristics of transmission channels used for other than telephon
3、e purposes Use of telephone-type circuits for voice-frequency telegraphy Telephone circuits or cables used for various types of telegraph transmission or simultaneous transmission Telephone-type circuits used for facsimile telegraphy Characteristics of data signals CHARACTERISTICS OF VISUAL TELEPHON
4、E SYSTEMS INFRASTRUCTURE OF AUDIOVISUAL SERVICES General Transmission multiplexing and synchronization Systems aspects Communication procedures Coding of moving video Related systems aspects H.10-H.19 H.20-H.29 H.30-H .39 H.40-H.49 H.50-H.99 H.100-H.199 H.200-H.219 H.220-H.229 H .230-H 239 H.240-H.2
5、59 H 260-H 279 H .280-H .299 Systems and d. terminal equipment for audiovisuat senrices Supplementary services for multimedia H.450-H.499 For further details, please refer to ITU-TList of Recommendations. STD-ITU-T RECMN H-34L-ENGL 1999 H 4Bb2593 0673767 837 8881 ITU-T RECOMMENDATION H.341 MULTIMEDI
6、A MANAGEMENT INFORMATION BASE Summary This Recommendation defines managed objects for H-series multimedia systems. It follows the ETF Simple Network Management Protocol (SNMP) for defining the managed objects and for managing ITU-T multimedia systems. This Recommendation includes an electronic attac
7、hment containing the formal descriptions of Annexes A, B, C, D and E. Source ITU-T Recommendation H.341 was prepared by ITU-T Study Group 16 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on 27 May 1999. STDWITU-T RECMN H-34L-ENGL 1999 4862591 Ob717b8 773 FOREWORD ITU (Intern
8、ational Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommen
9、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 their turn, produce Recommendations on these topics.
10、 The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 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 Recommen
11、dation the term recognized operating agency (ROA) includes any individual, company, corporation or governmental organization that operates a public correspondence service. The terms Administration, ROA and public correspondence are defined in the Constitution of the ITU (Geneva, 1992). INTELLECTUAL
12、PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, wh
13、ether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU had received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are
14、cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 2000 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 an
15、d microfilm, without permission in writing from the ITU. 1 1.1 1.2 1.3 1.4 2 3 4 5 6 7 7.1 7.2 8 8.1 8.2 9 9.1 9.2 9.3 9.4 9.5 9.6 9.7 10 STD-ITU-T RECMN H.343r-ENGL 1919 H 48bZ.591 Ob71767 CONTENTS Scope Management Information Base Overview Definition of Managed Objects Operations on Managed Object
16、s Management Agents . Normative references Informative references Definitions Symbols and abbreviations . Conventions MIB Applicability by Device Type H.323 Systems H.320 Systems Management Model Overview . Gateway Model Management Hierarchy 9.1.1 Callsignalling Multiple Instances H.323 9.1.2 RAS .
17、9.1.3 Terminal 9.1.4 Gatekeeper . 9.1.5 Multipoint Controller 9.1.6 Multipoint Processor . H.320 9.2.1 Entity . 9.2.2 Terminal 9.2.3 Multipoint Control Unit H.245 Gateway Real Time Protocol (RTP) MIB-II . Interfaces Group . OD Naming . LOT BB Page 2 3 4 4 5 7 7 7 8 8 8 8 8 8 9 9 9 9 9 10 10 10 10 ST
18、D-ITU-T RECNN H.34L-ENGL 1999 4862591 Ob71770 321 Page Annex A - Textual Conventions1 12 Annex B - H.3231 12 Annex C - H.3201 12 Annex D - H.2451 12 Annex E - H.323 GATEWAY . 12 This annex is available in electronic format only. STD-ITU-T RECMN H.34L-ENGL 1997 4862591 0671773 268 BE$a Recommendation
19、 H.341 MULTIMEDIA MANAGEMENT INFORMATION BASE2 1 Scope This Recommendation describes the Multimedia Management Information Base for H.323 and H.320 Multimedia Systems. The purpose of this Recommendation (MultimediaMIB) is to standardize the management information in multimedia conferencing systems b
20、ased on one of more of the ITU-T H-series Recommendations. The goal of Multimedia Management is to provide the appropriate level of management support for the particular Multimedia device. Multimedia management must permit the resources that are being used by individual Multimedia sessions to be ide
21、ntified for the purposes of fault detection, fault isolation, perfonnance monitoring, configuration management and capacity analysis. Multimedia management is applicable to both intermediate-system as well as end-system Multimedia devices such as terminals, multipoint control units (MCUs), gatekeepe
22、rs and gateways. The work presented in this Recommendation will be consistent with the conventions in the SNMP Version 2 SMI (Structure of Management Information) 27. 1.1 Management Information Base Overview A Management Information Base is a specification containing definitions of managed informati
23、on in a formalism that allows remote monitoring and control of systems over a network. The simplest, incorrect way is to visualize a ME3 as a database on a managed system. It is more correct to view a MIE3 as definitions of the information that can be accessed and the events that can be reported by
24、standard protocols. Standard operations are requested or performed on a system via a management agent by management clients. It is left to this management agent to access the requested information and return it to the requesting client. 1.2 Definition of Managed Objects The majority of the developme
25、nt of the MediaMIB can be broken down into the following four tasks: 1) Characterization of the managed entity in terms of components, attributes, actions, state and statistics. 2) Organization of information into collections of Object IDS (0ID)s. 3) MIE3 organization - MIB structure and hierarchy t
26、ree related to MIE3 Object Names. 4) Writing and maintaining of the MIE3 in abstract syntax. In SNMP, the rules for defining managed information and events are contained in the Structure of Management Information (SMI). This Recommendation includes an electronic attachment containing the formal desc
27、riptions of Annexes A, B, C, D and E. STD-ITU-T RECMN H.343-ENGL 1999 Y862591 Oh73772 1TY 1111 1.3 Operations on Managed Objects The definition of managed objects may proceed independent of the protocols used to operate on the MIB. The emphasis in this Recommendation is the IETF SNMP. However, opera
28、tions may be generalized into three categories: information retrieval, information modification, and unsolicited information reporting. It is conceivable that the MIBs defmed in the annexes can be reformatted or reused even if SNh4P is not the chosen protocol in the future. 1.4 Management Agents The
29、 processing entity responding to management operations is termed an agent. The agent needs access to MIE3 information and to receive notification of system events. Each managed subsystem must include instrumentation to provide MIB information to the agent. Formal definitions for these interfaces in
30、ISDN systems are described in Recommendation 4.940. In SNMP, the agent is less formalized and generally outside the scope of standardization. 2 Normative references The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provision
31、s of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendatio
32、ns and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. ITU-T Recommendation H.225.0 (1998), Call signalling protocols and media stream packetization for packet-based multimedia communication systems. ITU-T Recommendation H.242 (1 993), Syste
33、m for establishing communication between audiovisual terminals using digital channels up to 2 Mbit/s. ITU-T Recommendation H.243 (1 993), Procedures for establishing communication between three or more audiovisual terminals using digital channels up to 2 Mith. ITU-T Recommendation H.245 (1 998), Con
34、trol protocol for multimedia communications. CCITT Recommendation G.711 (1988), Pulse Code Modulation (PCM) of voice JFequencies. CCITT Recommendation G.722 (1988), 7 kHz audio-coding within 64 kbith. ITU-T Recommendation G.723.1 (1996), Dual rate speech coder for multimedia communications transmitt
35、ing at 5.3 and 6.3 kbitls. CCITT Recommendation G.728 (1992), Coding of speech at I6 kbit/s using low-delay code excited linear prediction. ITU-T Recommendation G.729 (1996), Coding of speech at 8 kbith using conjugate structure algebraic-code-excited linear-prediction (CS-ACELP). ITU-T Recommendati
36、on H.261 (1 993), Video codec for audiovisual services at p x 64 kbith. ITU-T Recommendation H.262 (1 995) I ISO/EC 1381 8-2: 1996, Information technology - Generic coding of moving pictures and associated audio information: Video. ITU-T Recommendation H.263 (1 996), Video coding for low bit rate co
37、mmunication. ITU-T Recommendation T. 120 (1 996), Data protocols for multimedia conferencing. ITU-T Recommendation H.320 (1 996), Narrow-band visual telephone systems and terminal equipment. STD.ITU-T RECflN H.341-ENGL 1999 48b2591 151 ITU-T Recommendation H.323 (1998), Packet based multimedia commu
38、nication systems. 171 ITU-T Recommendation H.324 (1996), Terminal for low bit rate multimedia communication. 181 ITU-T Recommendation H.3 1 O (1 996), Broadband audiovisual communication systems and terminals. 191 ITU-T Recommendation 4.93 1 (1 993), Digital Subscriber Signalling System No. I (DSSI)
39、 - ISDN user-network interface layer 3 specijcation for basic call control. 20 ITU-T Recommendation Q.932 (1993), Digital Subscriber Signalling System No. I (DSSI) - Generic procedures for the control of ISDN supplementary services. 21 ITU-T Recommendation Q.950 (1 993), Digital Subscriber Signallin
40、g System No. I (DSSI) - Supplementary services protocols, structure and general principles. 22 ISOAEC 10646-1 : 1993, Information technology - Universal Multiple-Octet Coded Character Set (WSC) - Part I: Architecture and Basic Multilingual Plane. 23 CCITT Recommendation E. 164 (1 99 i), Num bering p
41、lan for the ISDN era. 24 ITU-T Recommendation 4.940 (1988), ISDN user-network interface protocol for management - General aspects. 25 ITU-T Recommendation H.221 (1995), Frame structure for a 64 to 1920 kbith channel in audiovisual telesewices. 26 ITU-T Recommendation H.230 (1 995), Frame-synchronous
42、 control and indication signals for audiovisual systems. 3 Informative references 27 28 29 30 31 32 33 34 35 36 RFC 1902, Structure of Management Information for Version 2 of the Simple Network Management Protocol (SNMPv2). RFC 1903, Textual Conventions for Version 2 of the Simple Network Management
43、 Protocol (SNMPv2). RFC 1904, Conformance Statements for Version 2 of the Simple Network Management Protocol (SNMPv2). WC 1905, Protocol Operations for Version 2 of the Simple Network Management Protocol (SNMPv2). RFC 1906, Transport Mappings for Version 2 of the Simple Network Management Protocol (
44、SNMfi2). RFC 1907, Management Information Base for Version 2 of the Simple Network Management Protocol (SNMPv2). RFC 1908, Coexistence between Version I and Version 2 of the Internet-standard Network Management Framework. RFC 1889, RTP: A Transport Protocol for Real-Time Applications. RFC 1573, Evol
45、ution of the Interfaces Group ofMII3-II. RFC 2233, The Interfaces Group MIB using SMIv2. - - - STD.1TU-T RECMN H-34L-ENGL terminal and MCU. The MIBs defined in Annex B are listed in Table 2. As in H.323, if a terminal and MCU are Co-resident, then if this Recommendation is supported, all three MIBs
46、must be implemented. Table 2E.341- H.320 MIB Applicability by H.320 System Type 1- ManagedDevice I Terminal I MCU I Mandatory r- H.320 Entity I MCU In an H.320lH.323 gateway, the H.320 Entity is required. The MCU MIE3 is required if the device is also an H.320 MCU. 8 Management Model Overview 8.1 Ga
47、teway Model In 15 an H.323 gateway is defined as a device that provides the appropriate translations between transmission formats and communication procedures in order to facilitate communication between H.323 endpoints and devices and non-H.323 devices. In this Recommendation, gateway is modelled a
48、s in Figure 1. I H.323 I-132Qay 1 K H.320 Devices Devices J PSTN T160.5890-99 Devices Figure 1BH.341- Model of an H.323 Gateway This representation of a gateway can provide connections and the appropriate translations between some number of H.323 devices, H.320 devices, or PSTN devices. The model re
49、quires at least one H.323 connection and may connect H.323 devices to H.320, PSTN, or other H.323 devices. 8.2 Multiple Instances In order to accommodate multiple instances of an H.323 or H.320 device within a managed system, the MU3 modules in this Recommendation use ifindex fi-om the Interfaces MIB (RFC 1573, 2233) group to delineate between the instances. One way to employ this technique is for an instance of a device to be viewed as having a one to one correspondence with a physical interface. Figure 2 describes each of these approa
