Definition - What does Keystone Jack mean? Keystone jacks are keystone module connectors used in data communication and LAN wiring. It is the female connector that is usually mounted in a wall plate or patch panel and is connected to the matching male connector, called the keystone plug. What is a Keystone Jack? - Definition from Techopedia Is this answer helpful?Thanks!Give more feedbackThanks!How can it be improved?How can the answer be improved?Tell us how How to Wire Keystone Jack - CableOrganizer Comments about How to Wire Keystone Jack: Some jacks the wire goes thru the clips from the top, not the end. I like to position the wire at 90 degrees (from the top) of the jack, and run pairs in an "X" pattern. This way, the twists run all the way to the punchdowns.4.7/5(3) Keystone Jacks | Computer Cable Store wwwutercablestore›NetworkingKeystone Jacks: Cat5e and Cat6 keystone jacks, RJ11/RJ12 (Cat3) keystone jacks, as well as jacks for various other applications including component video, S-Video, RCA, and F-Type.