Complete guide to RJ45 pinout and wiring. Compare T568A vs T568B standards, color codes, straight-through vs crossover cables, and PCB design considerations for Ethernet connectors. You are designing a new networking product. The PCB layout is nearly complete, and the RJ45 jack footprint is placed. Then the question comes: Which wiring standard should I use … Read more

The Quiet Failure That Costs Thousands A procurement manager in Stuttgart once sent me a batch of unshielded RJ45 connectors for a new automotive assembly line. The installation looked clean. The cable tests passed. Three weeks later, the network began dropping packets every time the welding robots cycled. The root cause was not a bad … Read more

You are specifying connectors for a new product. The datasheet calls for a modular jack. You look at the footprint—eight contacts. Your procurement team asks: “Can we use the same part we use for telephones?” The short answer is no. The longer answer involves understanding why these two connectors look similar but serve entirely different … Read more