The keystone jacks are individually terminated using 110 insulation displacement connectors (IDC) with punch down cap for quick installation. User instructions and basic wiring layouts for standard configuration are included. The Keystone Jacks come with T568A or T568B wiring and comply fully with TIA/EIA-568-B.2-1 specifications for insertion loss (attenuation), near-end crosstalk (NEXT) loss, Return loss, and Far-end crosstalk (FEXT) loss for any pair combination up to 250 MHz.