As shown in the concept diagram below, the special patch cord consist of two 1,000 ohm resistors connected in series.
If you don't consider yourself an electronics handyman, then yo ucan purchase this patch dor from us. Otherwise, you can build this special patch cord using two (2) 1,000 Ohm resistors (1/2w or 1/4w). Connect one in series with the tip (red wire) and the other resistor on the ring (Green wire). You can find these resistors in your local electronics store e.g. Radioshack.