NOYAFA guides

permanent link covers fixed cabling panel-to-outlet; channel includes patch cords and is often the user complete path

toner+probe finds which port matches a wall socket; it does not replace length/wiremap verification for handover

split pairs keep pin-to-pin continuity but destroy correct twisting, so cheap continuity testers can falsely pass

use a length/TDR-capable tester to estimate distance to open or short before cutting walls or digging

verification finds opens/shorts/miswires/length; certification measures standards limits for manufacturer/consultant handover

for most new UK commercial installs use T568B consistently; match existing site scheme if already present