IEC 62148-3:20 10涵盖了SFF MT-RJ/LC/MU双工20针光纤收发器模块系列的物理接口规范。本标准的目的是充分规定光收发器的物理要求，使符合本标准的收发器在印刷电路板和任何面板安装要求的机械互换性成为可能。与上一版本相比，显著的技术变化是该版本包括20引脚SFF MT-RJ/LC/MU器件。 本出版物应与IEC 62148-1:20 02一起阅读。

IEC 62148-3:2010 covers the physical interface specifications for the SFF MT-RJ/LC/MU duplex 20-pin fibre optic transceiver module family. The intent of this standard is to adequately specify the physical requirements of an optical transceiver that will enable mechanical interchangeability of transceivers complying with this standard both at the printed circuit wiring board and for any panel-mounting requirement. The significant technical change with respect to the previous edition is that this edition includes 20-pin SFF MT-RJ/LC/MU devices.

This publication is to be read in conjunction with IEC 62148-1:2002.