数字通信用对绞或星绞多芯对称电缆 第7部分:具有1200MHz及以下传输特性的对绞或星绞对称电缆 数字及模拟通信电缆分规范
Multicore and symmetrical pair/quad cables for digital communications—Part 7: Symmetrical pair/quad cables with transmission characteristics up to 1 200MHz—Sectional specification for digital and analog communication cables