Question 6/XI - Application of the Stage 2 Recommendations to the
signalling protocols for OAM

Considering
(a) that a methodology is being developed for characterizing OAM,
capabilities;

(b) that signalling systems may need to evolve to support a range of OAM
capabilities;

(c) that there is a need to coordinate the application of Stage 2
Recommendations to the selection and definition of protocols, and that
OAM functions need to be allocated to both user and network entities
i.e., choice of specific physical scenarios from the Stage 2
Recommendations;

(d) that the OAM functions should be able to use the appropriate
component parts of Signalling System No. 7, DSS 1 and other CCITT
protocol Recommendations;

(e) that there is a need to establish a set of generic operations and
ASEs available for use by different applications and users;

(f) that compatibility with OSI principles be considered in selecting
protocols and in devising generic operations and ASEs;

(g) that means need to be included for the OAM of services and the
network based on input from Stage 1;

(h) that OAM requirements for hybrid, privatepublic networks, virtual
private networks, centrex and mobile networks need to be included;

(i) that close cooperation is needed with other CCITT Questions dealing
with:

-application of the Stage 2 Recommendation to the signalling protocols
services (new Question EXI),

-OSI protocols,

-OAM protocols.

What guidance to Stage 3 signalling protocol groups, new Recommendations
andor enhancements to existing Recommendations are necessary to meet the
current and future signalling and related protocol requirements of OAM?

Study points should include:

For each OAM function for which a Stage 3 definition is to be provided:

-selection of higher andor lower layer protocols needed to support the
OAM functions and identification of their roles and relationships;

-identification where appropriate of common elements of procedure andor
application service elements;

- identification of common encodings.

ANNEX 1

(to Question 6/XI)

Draft Recommendation Q.941

ISDN USER-NETWORK PROTOCOL FOR MANAGEMENT
PROTOCOL AND SERVICE SPECIFICATIONS

1. General

3. Services available at the System Management Interface (SMI)

4. Management protocol and information encoding rules

7. The convergence functions
7.1 Features of the convergence functions

APPENDIX A

(to draft Recommendation Q.941)

(to draft Recommendation Q.941)

ANNEX 2

(to Question 6/XI)

List of open issues

The following list of items allows contributing organizations to focus
on the open issues that need resolution by this Question.

1) The method by which Fast Select Service can be used to provide a
connectionless service to layer 4 is for further study.

2) Access to management services and management information may be
subject to access control. Access rights and access control mechanisms
need to be further analysed.

3) Should a list of protocols be produced that may be used at each layer
of the communication model in the User-Network Interface Management
Recommendation? It should be noted that preliminary information on which
this list could be generated is contained in the X.220 Recommendation.