ISO-11992-1 Complete Document History
Road vehicles - Interchange of digital information on electrical connections between towing and towed vehicles - Part 1: Physical and data-link layers

Complete Current Edition:
   3RD EDITION - Part 1: Physical and data-link layers - May 1, 2019

Obsolete Revision Information:
   2ND EDITION - Part 1: Physical and data-link layers - April 15, 2003
   1ST EDITION - INTERCHANGE OF DIGITAL INFORMA - April 1, 1998