Business TeleCommunications (BTC) - 2048 kbit/s digital unstructured and structured leased lines (D2048U and D2048S) - Network interface presentation; English version ETS 300418:1995
Access and Terminals (AT) - 2048 kbit/s digital unstructured and structured leased lines (D2048U and D2048S) - Network interface presentation (Endorsement of the English version EN 300418 V 1.2.1 (2001-07) as German Standard)— 1 стр.
