IEC 60793的本部分适用于A4类多模光纤及相关设备 子类别A4a、A4b、A4c、A4d、A4e、A4g、A4h和A4i。这些纤维有一个塑料芯 和塑料包层，可能具有阶跃折射率、多阶折射率或梯度折射率剖面。这个 光纤用于信息传输设备和采用类似技术的其他应用 光传输技术，以及光纤电缆。表1总结了一些突出的问题 这些纤维的特性和应用。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This part of IEC 60793 is applicable to category A4 optical multimode fibres and the related subcategories A4a, A4b, A4c, A4d, A4e, A4g, A4h and A4i. These fibres have a plastic core and plastic cladding and may have step-index, multi-step index or graded-index profiles. The fibres are used in information transmission equipment and other applications employing similar light transmitting techniques, and in fibre optic cables. Table 1 summarizes some of the salient characteristics and applications of these fibres.All current amendments available at time of purchase are included with the purchase of this document.