EN 60870-6-2-1995 遥控设备和系统.第6部分:与ISO标准和ITU-T推荐标准相兼容的传输协议.第2节:使用基础标准(OSI--1层至4层)(IEC 870-6-2-1995)
Telecontrol Equipment and Systems Part 6: Telecontrol Protocols Compatible with ISO Standards and ITU-T Recommendations Section 2: Use of Basic Standards (OSI Layers 1-4)