Abstract: A network device may identify an integrated circuit, a port group number, port lanes, and port channels associated with a transceiver port of a network device, and may map the integrated circuit, the port group number, the port lanes, and the port channels to the transceiver port. The network device may provide a time domain reflectometry pulse to a channel of the transceiver port at a first time and with a first voltage, and may receive a reflected time domain reflectometry pulse via the channel at a second time and with a second voltage. The network device may calculate a distance and an impedance of the channel based on the first time, the second time, the first voltage, and the second voltage, and may determine a status of the channel based on the distance and the impedance. The network device may output the status of the first channel.

Abstract: A printed circuit board (PCB) may include antipads, used to provide clearance for backdrilling, which may be sized to allow backdrilling in a way that minimizes the presence of stubs. The PCB may include pads to connect a component to the PCB and vertically disposed vias connected to at least some of the pads. The PCB may further include horizontally disposed signal layers, electrically connected by the vias, to route signals from the component, received from the vias, to an edge of the component, in which signals associated with the component closer to an inner portion of the component are routed to the edge of the component on higher ones of the signal layers than signals associated with the component further from the inner portion of the component.