Universal Network Cable

You select the cables by rotating the yellow collar to one of the five cables including:
ROLLED: Connect a host to a Cisco(TM) router or switch
CROSSOVER: Communicate directly between computers without a hub or switch
STRAIGHT-THROUGH: Use as a standard RJ45 patch cable
ATM / LOOPBACK: Test if a network card is working by checking for link lights with no need for a hub or switch
T1: Connect to DDS lines / T1 trunk lines

Mi pare ne esistano diversi tipi in giro, se non ricordo male i vecchi tempi “in sala macchine”, ma questo potrebbe essere utile a qualche Nerd praticante in ascolto.
In vendita qui per 30$.