Leveraging Kaparel design and reverse impeller hot-plug cartridges, 15U AdvancedTCA (ATCA) chassis provides at least 400 W/slot cooling capability while meeting all compliance criteria and recommended practices. Design meets NEBS requirements, including ability to cool chassis with fan tray removed for 2 min, and remains within FCC acoustic requirements. Both 40 and 10 GbE backplane options feature separate signal and power sections, and RiCool III blowers feature 185 cfm airflow per fan.