標準號：SIS SS 63 62 13-1985
中文標準名稱：信息處理系統．數據通信．**數據鏈接控制程序．程序元素合并
英文標準名稱：Data communication - High-level data link control procedures - Consolidation of elements of procedures
發布日期：1985/6/25 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：This International Standard specifies elements of data link con-trol procedures for synchronous, code-transparent data transmission using the HDLC frame structure specified in ISO 3309 and independent frame numbering in both directions.These HDLC elements of procedures are defined specifically in terms of the actions that occur on receipt of commands at a secondary station or a combined station.This International Standard is intended to cover a wide range of applications; for example one-way, two-way alternate or two-way simultaneous data communication between data stations which are usually buffered, including operations on different types of data circuits; for example multipoint/point-to-point, duplex/half-duplex, switched/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 of the commands or responses are required for a particular system implementation.