I am trying to create a wire-tap for ethernet cables by modifying a classic phone wiretap which uses inductance. I haven't studied this in quite some time and need to come up with a solution for a course project.
I have tested the wire-tap on earphones... put the coil around one wire going to an earpiece on a set of earphones and the wires from the coil went into an input on my amp, I was able to hear the music (very clearly) through the stereo speakers - so I know the concept is sound.
What I want to do is use this on the TX-wires of an ethernet cable (one induction coil per wire). The two coil-output wires need to feed the orange wire going to the sniffer machine and the two coil-output wires from the white-orange cable need to feed the white-orange cable on the sniffer machine. This is the part I'm stuck at (well for the moment)... I have 4 wires to feed 2, I tried to ground one of the wires, but that didn't work... has anyone got any ideas... or be able to help point in the right direction?