In copper twisted pair wire networks, copper cable certification is achieved through a thorough series of tests in accordance with Telecommunications Industry Association (TIA) or International Organization for Standardization (ISO) standards. It is this certification that allows the contractors to warranty their work.

Copper Testing Certifications
Copper Cable Certifiers	Copper Cable Testers
Network Testers and Analyzers	TDRs and Fault Locators (Low Voltage)
Telecom Testers	Tone and Probe Sets