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.