This International Standard describes elements of data link control procedures for synchronous bit sequence indepen-dent data transmission using the HDLC frame structure (see ISO33091>) and independent frame numbering in both directions.
These HDLC elements of procedures are described specially in terms of the actions that occur on receipt of commands at a secondary.
This International Standard is intended to cover a wide range of applications, for instance, one-way, two-way alternate or two-way simultaneous data communication between DTE's which are usually buffered, including operations on different types of data circuits, for example, multipoint/point-to-point connections, duplex/half-duplex transmission, switched or non-switched, etc.
The defined HDLC elements of procedures are to be considered as a common basis for establishing different types of control procedures. This International Standard does not define any single system and should not be regarded as a specification for a data communication system. Not all the commands or responses, respectively, might be required for a particular system implementation.
A DTE intended to be operated within the constraints of this International Standard provides a high degree of compatibility, if it implements all features of the stipulated dass of operation as specified in other HDLC standards.
SIS SS 63 62 13-1982 history
1985SIS SS 63 62 13-1985 Data communication - High-level data link control procedures - Consolidation of elements of procedures