Business telecommunication (btc). 64 kbit/S digital unrestricted leased line with octet integrity (D64U). Attachment requirements for terminal equipment interface
Edition 1996-02-01

Business telecommunications (btc). 64 kbit/S digital unrestricted leased line with octet integrity (D64U). Terminal equipment interface
Edition 1995-03-01

Business telecommunications (btc). 64 kbit/S digital unrestricted leased line with octet integrity (D64U). Network interface presentation
Edition 1995-03-01

BUSINESS TELECOMMUNICATIONS (BTC). 64 KBIT/S DIGITAL UNRESTRICTED LEASed line with octet integrity (D64U). Network interface presentation.
Edition 1999-01-11

BUSINESS TELECOMMUNICATIONS (BTC). 64 KBIT/S DIGITAL UNRESTRICTED LEASed line with octet integrity (D64U). Connection characteristics.
Edition 1999-01-11

BUSINESS TELECOMMUNICATIONS (BTC). 64 KBIT/S DIGITAL UNRESTRICTED LEASed line with octet integrity (D64U). Terminal equipment interface.
Edition 1999-01-11

Business TeleCommunications (BTC). Multiple 64 kbit/s digital unrestricted leased lines with octet integrity presented at a structured 2048 kbit/s interface at either or both ends (D64M). Connection characteristics and network interface presentation
Edition 2001-04-19

Home and Building Electronic Systems (HBES) - Part 4-1: Media independent layers - Application layer for HBES Class 1; German version EN 50090-4-1:2004, text English
Edition 2004-06

Accesss and Terminals (AT) - 64 kbit/s digital unrestricted leased line with octet integrity (D64U) - Network interface presentation (Endorsement of the English version EN 300288 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

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