ISO/IEC TR 11801-9904:2017（E）本技术报告提供了ISO/IEC 11801:2002中规定的已安装D类和E类信道是否支持2,5GBASE-T和5GBASE-T的指南。它还提供了缓解程序，以改善D类和E类信道的性能，使其达到支持这些应用的程度。根据ISO/IEC 11801:2002，更高级别将支持2,5GBASE-T和5GBASE-T，且无缓解措施，最高可达100米。

ISO/IEC TR 11801-9904:2017(E) This technical report provides guidance on whether installed Class D and Class E channels specified in ISO/IEC 11801:2002 will support 2,5GBASE-T and 5GBASE-T. It also provides mitigation procedures to improve the perfomance of Class D and Class E channels to the point where these applications are supported. Higher classes according to ISO/IEC 11801:2002 will support 2,5GBASE-T and 5GBASE-T without mitigation up to 100 m.