TIA/EIA Categories
The focal point of the standards activity is to define various categories of cabling that are matched to the needs of different applications. A category number is a standard rating that is applied to an entire cabling system, which in addition to cable runs, includes outlets, patch cords, panels, connectors, and cross-connect blocks. Rating and testing all of the components of a system makes a lot more sense than focusing only on the cable.
Note
ISO/IEC and CENELEC use some terminology that differs from the TIA/EIA language. As with TIA/EIA, connectors and cables are rated by category number. However, ISO/IEC and CENELEC use alphabetical class values to grade link performance. Class C corresponds to TIA/EIA Category 3 ...
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