layer1 - How exactly does an Ethernet collision happen in the cable, since nodes use different circuits for Tx and Rx? - Network Engineering Stack Exchange
Simplex vs Duplex Fiber Optic Cables | FS Community
Amazon.com: Inline LWL Duplex Kabel, LC/SC 9/125µm, OS2, Black Black 25 m : Electronics
Simplex vs Duplex Fiber Optic Cables | FS Community