This Recommendation I Intemational Standard specifies: a) five classes of procedures when operating over the connection-mode network service: 1) class O: simple class; 2)class 1 : basic error recovery class; 3) class 2: multiplexing class; 4) class 3 : error recovery and multiplexing class; 5) class 4: error detection and recovery class; for the connection-mode transfer of data and control information from one transport entity to a peer transport entity; b) one class (class 4) of procedure when operating over the connectionless-mode network service; c) the means of negotiating the class of procedures to be used by the transport entities; d) the structure and encoding of the transport protocol data units used for the transfer of data and control information. The procedures are defined in terms of: i) the interactions between peer transport entities through the exchange of transport protocol data units; ii) the interactions between a transport entity and the transport service user in the same system through the exchange of transport service primitives; iii) the interactions between a transport entity and the network service provider through the exchange of network service primitives. These procedures are defined in the main text of this Recommendation 1 Intemational Standard supplemented by state tables in Annex A. These procedures are applicable to instances of communication between systems which support the Transport Layer of the OS1 Reference Model and which wish to interconnect in an open systems environment. This Recommendation | International Standard specifies, in clause 14, conformance requirements for systems implementing these procedures and provides the PICS profonna in compliance with the relevant requirements, and in accordance with the relevant guidance, given in CCITT Rec. X.291 and ISO/IEC 9646-2. It does not contain tests which can be used to demonstrate this conformance.
ITU-T X.224 SPANISH-1995 Referenced Document
ITU-T X.213-1992 Information Technology - Network Service Definition for Open Systems Interconnection 68 pp (ISO/CCIT Common Text)
ITU-T X.214-1993 Information Technology - Open Systems Interconnection - Transport Service Definition - Data Networks and Open System Communications Open System Interconnection - General 29 pp
ITU-T X.264-1993 Transport Protocol Identification Mechanism Data Networks and Open System Communications Open Systems Interconnection - Protocol Identification (Study Group 7) 10 pp
ITU-T X.290-1992 OSI Conformance Testing Methodology and Framework for Protocol Recommendations for CCITT Applications - General Concepts (Study Group VII) 57 pp
ITU-T X.291-1992 OSI Conformance Testing Methodology and Framework for Protocol Recommendations for CCITT Applications - Abstract Test Suite Specification (Study Group VII) 48 pp
ITU-T X.650-1992 Open Systems Interconnection (OSI) - Reference Model for Naming and Addressing (Study Group VII) 32 pp
ITU-T X.224 SPANISH-1995 history
1995ITU-T X.224 FRENCH-1995 INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - PROTOCOL FOR PROVIDING THE CONNECTION-MODE TRANSPORT SERVICE
1993ITU-T X.224-1993 (WITHDRAWN) Protocol for Providing the OSI Connection-Mode Transport Service - Data Networks and Open System Communications Open Systems Interconnection - Connection-Mode Protocol Specifications (Study Group 7) 164 pp
ITU-T X.224 SPANISH-1995 INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - PROTOCOL FOR PROVIDING THE CONNECTION-MODE TRANSPORT SERVICE has been changed from ITU-T X.224-1993 (WITHDRAWN) Protocol for Providing the OSI Connection-Mode Transport Service - Data Networks and Open System Communications Open Systems Interconnection - Connection-Mode Protocol Specifications (Study Group 7) 164 pp.