What component is included in a channel test but not in a permanent link test?

A channel test is designed to assess the entire transmission path from the outlet through the cabling to the equipment, including any patch cords and connectors used in the system. In this context, patch cords are crucial because they can introduce additional attenuation and crosstalk that can affect the overall performance of the channel.

On the other hand, a permanent link test evaluates just the fixed portion of the cabling system, from the telecommunications outlet to the horizontal cross-connect, and does not account for any active equipment or patch cords that might be added after installation. Thus, while the permanent link test focuses on the installed cabling up to the equipment, it excludes the testing of patch cords which are included in the channel test.

The other options—length of the main cable, connecting hardware details, and installation environment conditions—are all factors that are typically addressed in both types of tests. The key distinction in including patch cords as part of a channel test but not of a permanent link test clarifies the nature of the testing environments and components assessed.