RJ45 network cables come in straight-through, and in crossover versions. Does straight-through in a patch cable mean that pin 1 in goes to pin 1 out?
What about everyday telephone cables? A flat cable, with wires going straight into the plug on each end. Physically, it looks like the very definition of straight-through. But does pin 1 in go to pin 1 out? NO!! Since the two plugs face in opposite directions, pin 1 goes to pin 4, and etc. Pin 1 to pin 1, would require a wire crossover or a 180-degree cable twist.
What about the straight-through RJ45 network cables? Yes! These DO have pin 1 in going to pin 1 out. And it's the crossover type that has pin 1 to pin 8, etc.
I thought about this at 3 AM, looked at a telephone cable, and changed the PCB layout for my beehive's five-sensor I2C jacks. But wait, are RJ11 RJ14 6P4C phone and RJ12 6P5C data cables different? Checking, Yes! An RJ11 voice cable can worked reversed, but an RJ12 data straight-through is pin 1 to pin 1. Some sellers of RJ11 RJ14 cables let you specify to get straight pin 1 to pin 1, or "reversed".
Sheesh, changing my PCB jack wiring back again.