ICC's High Density RJ11 Keystone Jacks are used in all voice connectivity applications with ease of termination in mind. They are designed to maximize the number of jacks in a patch panel, wall plate, or surface-mount box. The high density IDC configuration is easy to terminate using a 110 punchdown tool. A color-coded diagram shows the wiring configuration for USOC/UTP. These jacks live up to ICC brand's reputation for high-quality networking products.