Business TeleCommunications (BTC) - 34 MBit/s and 140 Mbit/s digital leased lines (D34U, D34S, D140U and D140S) - Network interface presentation; English version ETS 300686:1996
Access and Terminals (AT) - 34 MBit/s and 140 Mbit/s digital leased lines (D34U, D34S, D140U and D140S) - Network interface presentation (Endorsement of the English version EN 300686 V 1.2.1 (2001-07) as German Standard)— 1 стр.
