The second order digital multiplex equipment using positive justification described below, is intended for use on digital paths between countries using 1544 kbit/s primary multiplex equipments
ITU-T G.743-1993 Referenced Document
ITU-T G.703 Physical/electrical characteristics of hierarchical digital interfaces*, 2016-03-31 Update
ITU-T G.743 SECOND ORDER DIGITAL MULTIPLEX EQUIPMENT OPERATING AT 6312 kbit/s AND USING POSITIVE JUSTIFICATION
ITU-T G.743-1993 history
1993ITU-T G.743-1993 SECOND ORDER DIGITAL MULTIPLEX EQUIPMENT OPERATING AT 6312 kbit/s AND USING POSITIVE JUSTIFICATION