This Recommendation covers the characteristics and parameters of a digital transmission system at the network side of the NT1 to form part of the access digital section for the ISDN basic rate access. The specification of transmission system characteristics at the network side of the NT1 does not correspond to a reference point defined in the reference configuration for ISDN user-network interfaces in Recommendation I.411.
ITU-T G.961 FRENCH-1993 history
1993ITU-T G.961 FRENCH-1993 DIGITAL TRANSMISSION SYSTEM ON METALLIC LOCAL LINES FOR ISDN BASIC RATE ACCESS Study Group XVIII