UTP Cross- over Cable交叉线/跨接线 Crossover Cable Hub(MDI-X Switch(MDI-X 1= a RX: Receiving End 1(RX+ 18X7×: Transmitting End 2(RX-) 2(RX-) RX+<TX+ 3(TX+) 3(TX+) 6(TX) 6(TX) RXTX 4 Not used 4 Not used TX+ 5 Not used 5 Not used TX 9- Ry 7 Not used 7 Not used 8 Not use 8 Not used 00 00UooOUTP Cross-over Cable交叉线/跨接线 RX: Receiving End TX: Transmitting End RX+  TX+ RX-  TX￾TX+ ➔➔ RX+ TX- ➔➔ RX-