ISO 11992-1:1998 Road vehicles - Electrical connections between towing and towed vehicles - Interchange of digital information - Part 1: Physical layer and data link layer
2019ISO 11992-1:2019 Road vehicles — Interchange of digital information on electrical connections between towing and towed vehicles — Part 1: Physical and data-link layers
2003ISO 11992-1:2003 Road vehicles - Interchange of digital information on electrical connections between towing and towed vehicles - Part 1: Physical and data-link layer
1998ISO 11992-1:1998 Road vehicles - Electrical connections between towing and towed vehicles - Interchange of digital information - Part 1: Physical layer and data link layer