Everything You Need to Know About Keystone Jack

Understanding the Essentials of Keystone Jacks

In today’s digital age, the Internet has become an indispensable part of our lives. However, do you know what goes into setting up a network in your home? Alongside Ethernet cables and routers, Ethernet keystone jacks play a crucial role in network installation. The world of keystone jacks encompasses a variety of options for both telecommunication and entertainment systems. In this article, we will delve into the world of keystone jacks, equipping you with the knowledge you need to navigate this essential component of your network.

What exactly is a keystone jack and how is it used?

A keystone jack, as its name suggests, refers to a trapezoid-shaped module. It serves as a fundamental part of telecommunications and network infrastructure, commonly mounted on keystone wall plates, patch panels, and surface mount boxes. Acting as a female connector, the keystone jack enables seamless data transmission.

Keystone jacks are versatile, with dimensions standardized at 14.5mm width and 16.0mm height. They are designed to accommodate various types of Ethernet and other cables. These jacks feature different pins at the front, accepting different modular plugs. Depending on their structure, some may have a pass-through design with identical ports at the front and rear, while others may feature both female and male connectors.

Exploring the Different Types of Keystone Jacks

When we talk about keystone jacks, we typically refer to Ethernet keystone jacks. However, the world of keystone jacks offers much more variety in terms of structure, applications, and aesthetics. From gold-plated to white and black finishes, you can choose a keystone jack that complements the decor of your room. Let’s take a closer look at some common types:

  • Ethernet Keystone Jack: These jacks come in various categories, such as CAT5, CAT6, and CAT7, catering to different network needs. They can be shielded or unshielded, and available as punch-down or toolless variants.
  • Coax Keystone: Designed for easy and secure connection to RG6 coaxial cables, coax keystone jacks are commonly used for UHD TVs and audio-video signals.
  • Blank Keystone: Blank keystones are ideal for filling, covering, and protecting unused ports, ensuring a clean and dust-free environment.
  • Banana Keystone Jack: Also known as female connectors for banana plugs, these jacks facilitate quick and safe connection of speakers to audio devices.
  • RCA Keystone: RCA keystones are used to connect audio and video sources, receivers, and media centers. They feature a tiny, round hole surrounded by metal for easy installation.
  • HDMI Keystone Jack: To bring high-definition video and audio to your home, HDMI keystone jacks allow you to connect HDMI cables to patch panels or wall plates. They offer a professional look for home theater installations and ensure a clean and organized setup.

Types of Keystone Jacks

The Advantages of Keystone Jacks

Keystone jacks are widely used in homes, offices, and educational institutions, appealing to both novices and professionals. They provide a professional and tidy appearance for home networking, office setups, home theaters, telecommunications, and various entertainment systems. Let’s explore the advantages of keystone jacks:


Thanks to their standardized size, keystone jacks are compatible with most patch panels, keystone wall plates, and surface mount boxes available on the market. However, it’s important to verify compatibility when purchasing a wall plate or patch panel. Additionally, keystone wall plates can accommodate multiple ports with various configurations, allowing for flexible installation in data centers.


Keystone jacks offer a wide range of options to meet different network and low-voltage requirements. From Cat5 to Cat8 Ethernet keystone jacks, the market offers a variety of choices. Keystone jacks continue to evolve to keep pace with the ever-changing needs of networks and other technical settings. This diversity makes keystone jacks an ideal choice for your home network and theater installations.


High-quality keystone jacks feature a compact design that increases port density. Made of impact-resistant ABS plastic material, these jacks provide a clean and neat appearance. They effectively prevent dust and moisture, ensuring prolonged module service life and efficient data transmission.

To address any uncertainties or questions you may have, refer to our comprehensive Keystone Jack Buying Guide.

How to Install an Ethernet Keystone Jack?

Keystone jacks are commonly used for internal wall installations, protecting modules from damage while enhancing the overall aesthetics of your network cabling environment. If you’re wondering how to install a keystone jack on a blank keystone wall plate, the following step-by-step guide will assist you:

  1. Prepare professional tools, including a wire stripper, wire cutter, and punch-down tool.
  2. Use the wire stripper to cut the wire professionally.
  3. Carefully remove the plastic separator, ensuring not to damage the wire.
  4. Straighten and separate the wires.
  5. Insert the wires into the keystone jack in the correct order.
  6. Press the wires into the grooves of the keystone jack and punch them down.
  7. Insert the keystone jack into the keystone wall plate.
  8. Voila! Your keystone wall plate installation is complete.

Keystone Jack Installation

Frequently Asked Questions

Can I reuse keystone jacks?
Yes, keystone jacks can be used multiple times as long as they are in good condition.

Do keystone jacks have the same size?
Yes, keystone jacks typically share the same size and are interchangeable and replaceable.

How do I punch down an Ethernet keystone jack?
To terminate an Ethernet keystone jack, you will need a professional punch-down tool. Follow the steps outlined in this instructional video: “How to Terminate the CAT6 180 Degree RJ45 Keystone Jacks?”

That concludes our comprehensive guide to keystone jacks. Armed with this knowledge, you are well-equipped to make informed decisions when it comes to selecting, installing, and utilizing keystone jacks for your network and entertainment systems.

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