OPC Unified Architecture Specification - Part 100: Device Interface
Edition 2015-05

Access and Terminals (AT) - 2048 kbit/s digital unstructured leased line (D2048U) - Terminal equipment interface (Endorsement of the English version EN 300248 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) - 34 Mbit/s digital leased lines (D34U and D34S) - Terminal equipment interface (Endorsement of the English version EN 300689 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

Access and Terminals (AT) - 140 Mbit/s digital leased lines (D140U and D140S) - Terminal equipment interface; (Endorsement of the English version EN 300690 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) - 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

Transmission and Multiplexing (TM) - Synchronous Digital Hierarchy (SDH) ; SDH leased lines - Network and terminal interface presentation (Endorsement of the English version EN 301165 V 1.1.3 (2002-08) as German standard)
Edition 2003-08

Access and Terminals (AT) - Ordinary and special quality voice bandwidth 4-wire analogue leased lines (A4O and A4S) - Terminal equipment interface (Endorsement of the English version EN 300453 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

Equipment for commercial kitchens - Communication interface for commercial kitchen equipment - OPC Unified Architecture
Edition 2021-09