ITU-T X.212-1995 Information Technology - Open Systems Interconnection - Data Link Service Definition - Data Networks and Open System Communications Open Systems Interconnection - Service Definitions 33 pp
This Recommendation I International Standard defines the set of capabilities, in terms of an abstract service definition, provided by the Data Link Layer to the Network Layer. For designers of Network Layer protocols, it provides a definition of the Data Link service to allow design and implementation independent of details of the Data Link Layer protocol. For designers of Data Link Layer protocols, it defines the set of capabilities to be made available through the action of the protocol.
ITU-T X.212-1995 history
1995ITU-T X.212-1995 Information Technology - Open Systems Interconnection - Data Link Service Definition - Data Networks and Open System Communications Open Systems Interconnection - Service Definitions 33 pp
1988ITU-T X.212-1988 Data Link Service Definition for Open Systems Interconnection for CCITT Applications - Data Communication Networks - Open Systems Interconnection (OSI) Model and Notation, Service Definition (Study Group VII) 45 pp (Corrigenda-Oct 1992)