Error Prevention
Shielding means protecting wires by covering them with an insulating coating
shielding is one of the best ways to prevent impulse noise and cross-talk
the greater the shielding the more expensive the cable and more difficult to install
Moving Cables means relocating cables away from sources of noise (especially
power sources but also from lights and heavy machinery)
moving cables can reduce impulse noise and cross-talk
Changing Multiplexing Techniques often cures cross-talk and intermodulation (e.g., changing from FDM to TDM or changing the frequencies or size of the guardbands in frequency division multiplexing can help)