The DN1 Ethernet switch is a purpose-built network device designed to support the integration of professional audio systems within Milan AVB-based infrastructures. Developed by d&b audiotechnik, the DN1 Ethernet switch plays a critical role in enabling reliable, standards-based data transport for live sound, fixed installations, and other demanding AV applications. As an Avnu Alliance certified solution, the DN1 Ethernet switch supports simultaneous transmission of Milan AVB, AES70 OCA, Dante, and conventional IP traffic, allowing for compatibility with a wide range of devices and protocols. With its plug-and-play operation, the DN1 eliminates the need for complex configuration, enabling audio professionals and system integrators to deploy high-performance networks without requiring in-depth IT expertise. The switch automatically identifies primary and secondary Milan streams per port, alerts users to incorrect wiring, and supports automatic IP address switching in redundant network setups. Housed in a compact 1 rack unit 9.5-inch chassis, the DN1 Ethernet switch offers flexibility for installations where space efficiency is essential. It features eleven Ethernet ports, three of which are equipped with etherCON connectors on the front panel, including two that provide power over Ethernet for compatible devices such as the d&b ArraySight. By ensuring consistent, reliable signal distribution across a range of formats, the DN1 Ethernet switch strengthens the backbone of any Milan-enabled d&b system network.