IEC 60512-25-9:2008定义了一种测试方法，该方法旨在评估近距离连接器之间近端外来串扰和远端外来串扰（当安装在其安装系统中时）。离散模块连接器和多端口面板连接器均可使用该方法进行测试。该方法提供了一种测试任意两个端口之间的外来串扰的方法，以及一种评估所有其他端口的整体外来串扰的方法。通常适用于任何电气连接器，尤其适用于IEC 60603-7系列、IEC 61076-3-104中描述的连接器，以及用于数据传输的其他类型的连接器。

IEC 60512-25-9:2008 defines a test method which is intended to assess the near-end alien crosstalk and the far-end alien crosstalk between connectors in close proximity, when mounted in their mounting systems. Both discrete modular connectors and multi-port panel connectors may be tested using this method. This method provides a means to test the alien crosstalk between any two ports, as well as a means to assess the overall alien crosstalk from all other ports. Is generally applicable to any electrical connector, and is particularly suitable to connectors described in IEC 60603-7 series, IEC 61076-3-104, and other types of connectors for data transmission.