US Patent 7382273 Wired tool string component

An apparatus is disclosed as having a downhole string component having first and second ends. The first end has first and second signal couplers, and the second end has third and fourth signal couplers. An electrical conductor is in electrical communication with the first, second, third, and fourth signal couplers. The first and third signal couplers have a first band pass filter with a first resonant frequency and the second and fourth signal couplers have a second band pass filter with a second resonant frequency.