Which standard defines performance and channel requirements for copper cabling in buildings?

• A. EN 50173
• B. ANSI/TIA-568-C; specifically TIA-568-C.2 for balanced twisted-pair cabling.
• C. ISO/IEC 11801
• D. IEEE 802.3

Answer: (B)

ANSI/TIA-568-C, specifically TIA-568-C.2, defines the performance and channel requirements for copper cabling in buildings. This standard sets the electrical performance targets (such as insertion loss, NEXT, FEXT, return loss), the channel model used to evaluate installed copper cabling, and the maximum link lengths for common copper categories like Cat5e, Cat6, and Cat6a, including requirements for the components that make up the channel (cables, connectors, patch panels, and patch cords). It ensures that in-building copper cabling will reliably support the intended data services with predictable performance. Other standards provide broader or international context—EN 50173 for European generic cabling or ISO/IEC 11801 for international generic cabling—but the in-building copper channel performance most directly defined for U.S.-style practice comes from the TIA-568-C.2 specifications. IEEE 802.3 covers Ethernet technology and data rates, not the in-building cabling channel requirements themselves.