The Recommendation describes that 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 SPANISH-1993 history
1993ITU-T G.742 SPANISH-1993 SECOND ORDER DIGITAL MULTIPLEX EQUIPMENT OPERATING AT 8448 kbit/s AND USING POSITIVE JUSTIFICATION