scope:

Scope and field of application

The ACSE supports two modes of communication: connection-oriented and connectionless. The ACSE service definition (ITU-T Rec. X.217 I ISO/IEC 8649) includes both modes of communication. This Protocol Specification provides the protocol specification for the connection-oriented code of communication.The protocol specification for the connectionless mode of communications contained in ITU-T Rec. X.237 I ISO/IEC 10035 1.

This Protocol Specification Defines redressed hat are applicable to instancesof communication between systems which wish to interconnect in an Open Systems Interconnection environment in a connection-oriented mode. The Protocol Specification includes the Kernel functional unit that is used to establish and release application-associations. The Authentication functional unit provides additional facilities for exchanging information in support of authentication during association establishment without adding new services.The ACSE authentication facilities can be used to support a limited class of authentication methods. The Application Context Negotiation functional unit provides additional facility for the selection of the application context during association establishment.

This Protocol Specification specifies:

a) procedures for the transfer of information for application-associations control and the authentication of application-entities;

b) the interaction between an ACSE protocol machine and the occurrence of external presentation events; and

c) the abstract syntax for the representation of the ACSE APDUs.

The ACSE proceduresa re defined in terms of:

a) the interactionsb etweenp eer ACSE protocol machinest hrough the use of presentation-services;and

b) the interaction between an ACSE protocol machine and its service-user.

This Protocol Specification also specifiesc onformancer equirementsf or systemsi mplementing thesep rocedures.It does not contain tests which can be usedt o demonstratec onformance.