Ethernet cable testers are dime a dozen, but none of them are as elegant and multimeter-friendly as this tester from our Hackaday.io regular, [Bharbour]. An Ethernet cable has 8 wires, and the 9 ...

One of these is the 8163A “lightwave multimeter” and [Signal Path] tears ... Our suspicion is that taking the cables out and putting them back in restored connections between the main board ...