Access and Terminals (AT) - 64 kbit/s digital unrestricted leased line with octet integrity (D64U) - Connection characteristics (Endorsement of the English version EN 300289 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

Access and Terminal (AT) - 64 kbit/s digital unrestricted leased line with octet integrity (D64U) - Terminal equipment interface (Endorsement of the English version EN 300290 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

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)
Edition 2002-01

Access and Terminals (AT) - 2048 kbit/s digital structured leased lines (D2048S) - Connection characteristics (Endorsement of the English version EN 300419 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

Access and Terminals (AT) - 2048 kbit/s digital structured leased lines (D2048S) - Terminal equipment interface (Endorsement of the English version EN 300420 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

Access and Terminals (AT) - Ordinary quality voice bandwidth 2-wire analogue leased line (A2O) - Connection characteristics and network interface presentation (Endorsement of the English version EN 300448 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

Access and Terminals (AT) - Special quality voice bandwidth 2-wire analogue leased line (A2S) - Connection characteristics and network interface presentation (Endorsement of the English version EN 300449 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

Access and Terminals (AT) - Ordinary and special quality voice bandwidth 2-wire analogue leased lines (A2O and A2S) - Terminal equipment interface (Endorsement of the English version EN 300450 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

Access and Terminals (AT) - Ordinary quality voice bandwidth 4-wire analogue leased line (A4O) - Connection characteristics and network interface presentation (Endorsement of the English version EN 300451 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

Access and Terminals (AT) - Special quality voice bandwidth 4-wire analogue leased line (A4S) - Connection characteristics and network interface presentation (Endorsement of the English version EN 300452 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01