usually has less effect on a signal than insertion loss, but plays a major role if power over Ethernet is required. Also measured in ohms is the characteristic impedance of the cable, which is independent of the cable length. See also Cable tester Continuity tester Copper wire and cable Notes International standard ISO/IEC 11801: Information technology — Generic cabling for customer premises Telecommunications Industry Association (TIA) Commercial Building Telecommunications Cabling Standard Part 1: General Requirements (ANSI/TIA/EIA-568-B.1-2001) Telecommunications Industry Association (TIA) Commercial Building Telecommunications Cabling Standard Part 2: Balanced Twisted Pair Components Addendum 1 Transmission Performance Specifications for 4-Pair 100 Ohm Category 6 Cabling (ANSI/TIA/EIA-568-B.2-1-2002) External links Wire Resistance Calculator and Table Signal cables