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1 简介仅在10年之前，3类（CAT 3）（布线系统）还被认为是一种可以接受的布线系统，而且仅在5年之前，类（CAT 5）（布线系统）被推介为一种预计使用寿命至少为15年的布线解决方案。目前，我们拥有了超5类（CAT 5e）、6类（Class E）、甚至7类（Class F）布线解决方案。尽管
1 Introduction CAT 3 (cabling system) was also considered an acceptable cabling system only 10 years ago, and only CAT 5 (cabling system) was introduced as one The expected wiring life of at least 15 years of wiring solutions. We currently have CAT 5e, Class E, and even Class F cabling solutions. in spite of