The second order digital multiplex equipment using positive justification, described below, is intended for use on digital paths between countries using 2048 kbit/s primary multiplex equipments
ITU-T G.742-1993 Referenced Document
ITU-T G.703 Physical/electrical characteristics of hierarchical digital interfaces*, 2016-03-31 Update
ITU-T G.742 SECOND ORDER DIGITAL MULTIPLEX EQUIPMENT OPERATING AT 8448 kbit/s AND USING POSITIVE JUSTIFICATION
ITU-T G.742-1993 history
1993ITU-T G.742-1993 SECOND ORDER DIGITAL MULTIPLEX EQUIPMENT OPERATING AT 8448 kbit/s AND USING POSITIVE JUSTIFICATION