10Base-T Crossover Patch Cord by Brandy McNeilin Datacomm TablesFebruary 27, 2017 This cable is used to cascade hubs, or for connecting two Ethernet stations back-to-back without a hub. Note pin numbering of straight-thru patch cord. RJ45 PLUG RJ45 PLUG 1 Tx+ Rx+ 3 2 Tx Rx- 6 3 RX+ Tx+ 1 6 Rx+ Tx- 2