CentreCOM 210T Twisted Pair Transciever

Does exactly what the label says, Converts AUI to UTP for me.

What is AUI? Attachment Unit Interface

Back in the day when it was expensive to get a network interface they decided to breakup the cards into ‘addons’.

You could find these MAU/AUI converters for 10BASE5 (thicknet) and 10BASE2 (thinnet). But around 1990 these were already absolete as BNC and Ethernet was becoming the standard. Where Ethernet won in the long run. Still its fun to visit these old network things…

A good video on youtube explains this propperly: “Retro 10base5 Thicknet and 10base2 Thinnet network” I can recommend other video’s of this content creator too.