Integrated Services Digital Network (ISDN) - Primary rate User-Network Interface (UNI) - Part 2: Conformance test specification for interface I<(Index)A> and I<(Index)B>; English version ETS 300011-2:1998
Customer premises cabling for information technology - Part 2: 2048 kbit/s ISDN primary access and leased line network interface; German version EN 50098-2:1996— 15 стр.
Transmission and Multiplexing (TM) - Physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2 048 kbit/s-based plesiochronous or synchronous digital hierarchies
