Advanced Telecommunications Computing Architecture (ATCA or AdvancedTCA) is the largest specification effort in the history of the PCI Industrial Computer Manufacturers Group (PICMG), with more than 100 companies participating. Known as AdvancedTCA, the official specification designation PICMG 3.x (see below) was ratified by the PICMG organization in. Mechanical specificationsAn AdvancedTCA board (blade) is 280 mm deep and 322 mm high. The boards have a metal front panel and a metal cover on the bottom of the to limit and to limit the spread of fi. The AdvancedTCA provides point-to-point connections between the boards and does not use a data bus. The backplane definition is divided into three sections; Zone-1, Zone-2, and Zone-3. The connectors.