USB (Universal Serial Bus) is the most- popular interface in the connectivity of PC architecture. It is a fast, bi- directional, isochronous, low-cost, and a dynamically attachable serial interface that is consistent with the requirements of PC platform of today and tomorrow. USB cables have four conductors: a twisted signal pair and a power pair in a range of permitted gauges. USB cables also supports Plug & Play and Hot Swappable capability.