30 years ago, I asked to see how the cable was made. In a hour I was making cable drops and running the cable. Using 25 conductor cable, configuring pins 2,3,

30 years ago, I asked to see how the cable was made. In a hour I was making cable drops and running the cable. Using 25 conductor cable, configuring pins 2,3,7 it was nothing to cable 4 PCs in each of 2 offices in a day. Nevermind the cable ran across florescent lighting, etc. Later that week I learned to check the runs were less than a certain length from the computer room. But primarily I wrote software.