The Eclipse HX-Delta is a three rack unit (3RU) matrix intercom system frame with slots for two CPU cards, four I/O interface cards and three interface modules. Two external power supplies are provided. RJ45 and fiber connectors are located on the rear of the chassis, connecting the CPU and interface cards to intercom devices and media, such as user keypanels, interfaces, 4-wire audio equipment, wireless equipment and fiber optic cables.