1、CCITT RECMN*M=3600 92 4862593 0579073 260 INTERNATIONAL TELECOMMUNICATION UNION CCITT TH E INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE MAINTENANCE: ISDN M.3600 (1 0/92) PRINCIPLES FOR THE MANAGEMENT OF ISDNs I Recommendation M.3600 CCITT RECMN*M.3600 92 H 486257l 0577072 lT7 = FOREW
2、ORD The CCIT (the International Telegraph and Telephone Consultative Committee) is a permanent organ of the International Telecommunication Union (ITU). CCIT is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecom
3、munications on a worldwide basis. The Plenary Assembly of CCIT 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 of CCITT between Plenary Assemblies is covered by the procedure laid
4、 down in CCIT Resolution No. 2 (Melbourne, 1988). Recommendation M.3600 was revised by Study Group IV and was approved under the Resolution No. 2 procedure on the 5th of October 1992. CCIT NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecom
5、munication administration and a recognized private operating agency. O IT 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 permission in writing from the ITU. CCITT
6、 RECMN*M.3bOO 92 H 4Bb253L 0579073 033 I Recommendation M.3600 PRINCIPLES FOR THE MANAGEMENT OF ISDNs (Melbourne 1988 as Rec. M.36; revised and renumbered in 1992) Abstract This recommendation provides the management principles and architecture of the ISDN. Management Keywords: - ISDN management arc
7、hitecture; - ISDN management principles; - ISDN management; - management service provider; - OAM-centre; - subscriber access; - subscriber installation. functions and their relationships are defined in detail. 1 General The purpose of this Recommendation is to provide management principles and archi
8、tecture to be adopted by administrations, RPOAs and other Management Service Providers (MSP) in order to manage ISDNs. 1.1 Scope of application Recommendations: - - - In providing this guidance, due consideration has been given to the principles identified in the following Recommendation M.20 i defi
9、nes the maintenance philosophy for telecommunications networks; Recommendation M.3010 2 defines the principles for the telecommunications management network; Recommendation M.32 3 defines the principles for using alarm information for maintenance of international transmission systems and equipment;
10、Recommendation M.34 4 defines the performance monitoring on international transmission systems and equipment; Recommendations Q.940 and Q.941 6 describe the model, service elements and protocols to be provided at the ISDN userhetwork interfaces for management; Recommendation M.2100 9 provides the ma
11、intenance limits for digital paths and sections to achieve the performance objectives given in Recommendation G.821 lo. This Recommendation defines the ISDN management concepts with respect to areas of fault, performance and configuration management of subscriber installations, networks, including t
12、he transit network, and interworking between ISDNs, and other networks, including both existing and future public and private networks). - - - i) Other aspects of management are for further study. Recommendation M.3600 (10/92) 1 CCITT RECNN*M*3600 72 4862591 0579074 T7T This Recommendation takes int
13、o consideration basic ISDN features such as: - open communication via the SIT reference points; - portability of terminais between SIT reference points, from subscriber installation to subscriber installation, and from ISDN-to-ISDN. For information on ISDN channels, terminations and interfaces, see
14、Recommendations 1.41 1 and 1.412 8. 1.2 Relation to other Recommendations This Recommendation is the overview Recommendation in a Series of Recommendations on ISDN management. The other Recommendations are the following: a) Other M.3600-Series Recommendations describe reference configuration and gen
15、eral architecture for maintenance of ISDN subscriber access and subscriber installation as follows: - Recommendation M.3602 il is concerned with the maintenance of the ISDN subscriber installation. The maintenance principles are given in a general way for functions which are dependent on the design
16、of NT2 and TE and more precisely where it impacts on the S or T interface (Le. in relation to Recommendations 1.430 and 1.431 8). These functions are supervised andor controlled by the subscriber installation. - Recommendation M.3603 12 describes maintenance for the network portion of the ISDN basic
17、 rate access (144 kbitis). A common format with other similar Recommendations, in conformance with Recommendation M.20 i, is used. The functions performed by the digital transmission section and the exchange termination (ET) are identified. These functions are supervised andor controlled by the netw
18、ork or administration. - Recommendation M.3604 13 describes maintenance of the network portion of the ISDN primary rate access (2048 and 1544 kbitis) following the same principles as given in Recommenda- tion M.3603 12. The functions provided by the digital transmission section and the exchange term
19、ination (ET) are identified. The functions are supervised and/or controlled by the network or administration. - Recommendation M.3605 14 describes the maintenance of a multiplexed basic rate system. Reference is made to Recommendations M.3603 121 and M.3604 131 when common mechanisms are applied. Th
20、e functions performed by the digital section of the ISDN basic rate access, the basic access multiplexer, the digital link, and the exchange termination (ET) are identified. These functions are supervised andor controlled by the network or administration. b) Recommendation M.3620 15 describes ISDN t
21、est calls originating from a test system and terminated by a test call responder. It also describes their application as part of end-to-end ISDN maintenance. c) Recommendation M.3640 16 describes management of layers 2 and 3 of the D-channel communica- tions. d) Recommendation M.3660 17 describes IS
22、DN interface management services and their use in maintaining ISDN. The ISDN management protocols which provide this activity are contained in Recommenda- tion Q.941 6 on ISDN user-network management protocols. 2 Recommendation M.3600 (10192) CCITT RECMN*Mm3bOO 92 E 4862591 0579075 906 2 Defimitions
23、 2.1 Reference definitions 2,l. 1 Organizational component definitions 2.1.1.1 Subscriber Installation (SI) An SI is an organization located in the subscriber side, that contains people, TES, NEs and, if needed, operations systems, which together have the responsibility for and capability of maintai
24、ning subscriber installation facilities. 2.1.1.2 Local Exchange Centre (LEC) An LEC is an organization that is in charge of operating and maintaining local exchanges and subscriber accesses. It may contain people, local exchanges and local exchange operation systems, which together have the responsi
25、bility for and capability of maintaining local exchanges and ISDN subscriber accesses. 2.1.1.3 Operation Administration Maintenance Centre (OAMC) An OAMC is an organization that is in charge of operating and maintaining networks and services. It is located somewhere within the network and contains p
26、eople and operations systems, which together have the responsibility for and capability of maintaining ISDNs. 2.1.1.4 Management Service Provider (MSP) MSP is an organization which provides management services to subscribers. An MSP contains people and operation systems, which together have the resp
27、onsibility for and capability of providing a limited management service for ISDNs. - Agreement on responsibility for management between subscriber and the MSP for each part or parts of the subscriber installation should be made at the time of subscription (this may take the form of a commercial cont
28、ract). In any case, provision to allow a customer to change the management service provider(s) is recommended. The subscriber may choose not to make such an agreement with an MSP. Management service providers can be: - private providers; or - the administration: or - - the subscriber. - It is the re
29、sponsibility of a subscriber installation and not of the network to ensure that an unauthorized MSP cannot access management functions in the subscriber installation. 2.1.2 System definitions 2.1.2.1 SI Operation System (SI-OS) SI-OS is a system that performs operation functions within SI and commun
30、icates with other OSs within other organizations in order to facilitate the management of subscriber access and ISDN services. This OS may be realized as part of the equipment located within the subscriber installation. 2.1.2.2 Local Exchange Operation System (LE-OS) LE-OS is a system that is locate
31、d in a local exchange centre and perorms local exchange operation functions to maintain local exchanges and subscriber access. This OS may be realized as part of the local exchanges. This OS communicates with other OSs within other organizations in order to facilitate the management of subscriber ac
32、cess and ISDN services. Recommendation M.3600 (10D2) 3 CCITT RECMN*M*3600 92 4862573 0577076 842 2.1.2.3 OAMC Operation System (OAMC-OS) OAMC-OS is a system that is located in OAMC and performs network operation functions to maintain ISDN facilities and services. This OS communicates with other 0% i
33、n other organizations in order to facilitate the management of ISDN facilities and services. 2.1.2.4 MSP Operation System (MSP-OS) MSP-OS is a system that is located in MSP and performs part of management functions in SI. This OS communicates with other OSs in other organizations in order to increas
34、e its management functions. 2.1.3 Management function definitions 2.1.3.1 Subscriber Installation Management Function (SIMF) A SIMF represents a group of dedicated functions contained within the functional groups (as specified in Recommendation 1.4 11 8) of the subscriber installation which may have
35、 one or more of the following purposes: - interaction with the (human) user; - - handling of management protocol from the SAW and /or an MSP-MF; control of internai testing and maintenance mechanism. It is considered that the functions may be distributed throughout the protocol layers implemented in
36、 the subscriber equipment, SI-OS, and MSP-OSs, including NTl functions in some applications, but the precise architecture and protocol of the SIMF implementation is not a subject of this Recommendation. Examples of SIMFs are: - control TE loopbacks; - - - identification of TE service capability; con
37、trol generation of test signals for maintenance of subscriber installation wiring; provide access to performance data within subscriber installation, e.g. layer two and three protocol performance; security screening of requests from MSP-MF. - 2.1.3.2 Subscriber Access Management Function (SAMF) A SA
38、MF represents a group of functions for managing the subscriber access and communication with other management functions in other OS. The SAMF may be distributed throughout a local exchange OS and OAMC-OS but precise architecture of the SAMF implementation is not a subject of this Recommendation. Exa
39、mples of SAWS are: - - - control loopbacks in an NT1 or LT; supervise the service state of the subscriber access; provide access to subscriber access performance information. 2.1.3.3 OAMC Management Function (OAMC-MF) An OAMC-h4F represents a group of functions for managing the network including fac
40、ilities and services. The OAMC-MF may be distributed to several OAMC-OSs but the precise architecture of the OAMC-MF implementation is not a subject of this Recommendation. 4 Recommendation M.3600 (10192) CCITT RECNN*N.3600 92 W 4862593 0579077 789 Examples of OAMC-MF functions are: - - - - - reques
41、t SAMF to control loopback activation; supervise the bringing into service of a subscriber access; obtain performance information on the subscriber access from the SAME manage teleservices provided to a subscriber; screen requests from MSPs for authorization. 2.1.3.4 MSP Management Function (MSP-MF)
42、 An MSP-MF represents a group of functions for managing the subscriber installation or a part of the subscriber installation. An MSP-MF cannot control the management functions of the subscriber access. If authorized, it can request information from the OAMC-MF about the subscriber access. Examples o
43、f MSP-MF functions are: - Request SIMF maintenance activity; - - provide test responders function. request OAMC-MF management information that is allowed; 2.2 Other definitions 2.2.1 Network A network is the public part of the ISDN which is managed under the responsibility of the administration or a
44、 RFQA. 2.2.2 Operation, Administration and Maintenance (OAM) These three aspects form the base for the necessary management functions for ISDN. 2.2.3 ISDN Interface Management Services These services are defined on the User Network Interface UNI and provide a customer with management capabilities. 3
45、 Management principles for ISDN 3.1 General muintenance principles for ISDN The fundamental maintenance strategy is to rely on performance monitoring wherever possible in order to The maintenance capabilities provided must ailow for the clear differentiation of troubles between subscriber The mainte
46、nance capabilities provided must allow for clear differentiation between failures and legitimate An MSP should be able to localize the fault in its domain without disturbing the network or other domains. apply the controlled maintenance principles of Recommendation M.20 i. and network equipment. sub
47、scriber activities. This should be possible locally and remotely, i.e. across networks and between any allowed management entities. additional trouble localization ability. network side. The network should be able to receive failure or performance information from the subscriber side. Testing will b
48、e needed both to supplement the performance monitoring for trouble detection and to provide The subscriber installation should be able to receive failure or performance information if sent from the A capability should be provided to control the status of the subscriber access and of the subscriber e
49、quipment during maintenance operations. Recommendation M.3600 (10B2) 5 The subscriber installation (or its MSP) should be able to receive information about the maintenance status of its access, if sent from the network . Only the Administration may initiate maintenance action within the subscriber access. The subscriber installation (or its MSP, either private or administration) may initiate maintenance action within the subscriber instaliation. In order to try and meet overall objectives, a number of points have been identified for admini
