标准摘要
This standard specifies services whose architecture can be described in the context of the physical layer architecture (1) and the data link layer architecture (2) of the ISO Open Systems Interconnection Basic Reference Model - ISO 7498.Cross Reference:
英文名称Electrical and Mechanical Interface Characteristics and Line Control Protocol Using Communication Control Characters for Serial Data Link Between a Direct Numerical Control System and Numerical Control Equipment Employing Asynchronous Full Duplex Transmission