BS ISO/IEC 8649:1996 - Information technology. Open systems interconnection. Service definition for the association control service element
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This Service Definition defines ACSE services for application-association control in an open systems interconnection
environment. ACSE supports two modes of communication service: connection-oriented and connectionless.
The ACSE connection-oriented service is provided by the use of the connection-oriented ACSE protocol (see ITU-T
Rec. X.2271 ISO/IEC 8650-1) in conjunction with the connection-oriented presentation-service (see ITU-T Rec. X.2161
ISO/IEC 8822). The ACSE connection-oriented service assumes as a minimum the use of the presentation-service
connection-oriented Kernel functional unit.
The ACSE connectionless service (A-UNIT-DATA) is provided by the use of the connectionless ACSE protocol (see
ITU-T Rec. X.237 1 ISO/IEC 10035-1) in conjunction with the connectionless presentation-service (P-UNIT-DATA).
Three functional units are defined in the ACSE. The mandatory Kernel functional unit is used to establish and release
application-associations. The ACSE includes two optional functional units. The optional Authentication functional unit
supports the exchange of information in support of authentication during association establishment. It provides
additional facilities for exchanging information in support of authentication during association establishment without
adding services. The ACSE authentication facilities may be used to support a limited class of authentication methods.
The second optional functional unit supports the negotiation of application context during association establishment. The
ACSE services apply to a wide range of application-process communications.
This Service Definition does not specify individual implementations or products, nor does it constrain the
implementation of entities and interfaces within a computer system.
No requirement is made for conformance to this Service Definition.
Association control service element; Computer technology; Open systems interconnection; Connectionless-mode (OSI)
Application layer (OSI); Verification; Data transfer; Data processing; Data transmission control procedures; Definitions
Data transmission; Connection-mode (OSI); Control functions
