The Speedster7t FPGA family of devices has a network hierarchy that enables extremely high-speed dataflow between the FPGA core and the interfaces around the periphery, as well as between logic within the FPGA itself. This on-chip network hierarchy supports a cross-sectional bidirectional bandwidth of 20 Tbps. It supports a multitude of interface protocols including GDDR6, DDR4/5, 400G Ethernet, and PCI Express Gen5 data streams, while greatly simplifying access to memory and high-speed protocols. Achronix's network on chip (NoC) provides for read/write transactions throughout the device, as well as specialized support for 400G Ethernet streams in selected columns. The features of the NoC described in this user guide generally pertain to the entire Speedster7t family of devices. In order to help users understand specific connections and features of the NoC, this user guide focuses on the NoC as implemented in the AC7t1500 device.