Ethernet Keystone Jacks In the Wild!

Ethernet Keystone Jacks - In the Wild!

Written by Don Schultz, Technical Expert, Fluke Networks Versiv & BICSI INSTC Certified Technician

Ethernet keystone jacks can be an important part of well designed and flexible LAN (local area network). You have to terminate your cable somehow, and keystone jacks are a very convenient and effective way to do this.

This blog does not focus on the technical termination details of keystone jacks, as those topics have been covered in these blogs:

How to: Terminate an Unshielded Punch Down Keystone Jack

How to: Terminate a Shielded Toolless Keystone Jack

How to: Terminate an Unshielded Toolless Keystone Jack

Instead, this blog and companion video focus on real world applications for keystone jacks. You can only understand so much about a technical item before seeing it in operation becomes important.



Keystone jacks can be used for

  • Patch panels (unloaded or pre-loaded)
  • In-wall Ethernet with a face plate
  • Floor monuments
  • Consolidation points
  • ...and more

Of the applications, the most commonly seen are patch panels and in-wall with a face plate. In large installations consolidation points are seen--especially large work spaces involving cubicle farms.

When it comes to keystone jack selection, the way you terminate it is a matter of preference. For example, our tool-less and punch down varieties perform the same. They just get attached differently. So, when selecting a jack the two main considerations are:

  • Category (Cat5e, Cat6, or Cat6A)
  • Shielded or unshielded

For the shielded or unshielded consideration, the decision is pretty simple. Use shielded keystones for shielded cable and unshielded keystones with unshielded cabling. The biggest consideration to watch out for is Category. Unless you want to degrade your network performance, always use the same or higher Category keystone jack as the Category of your Ethernet cable. Likewise, use the same or higher Category patch cables from the keystone jack to your networking equipment and end point devices.

Keystone jacks come in a few varieties such as tool-less, punch down, and pass through.

  • Punch down and tool-less keystones are ideal for terminating solid copper bulk Ethernet
  • Pass through keystone jacks are similar to Ethernet couplers, except they are designed to snap into a face plate or patch panel. Both sides of the pass through keystone accept pre-terminated Ethernet cable using RJ45 8P8C connectors.

So, enough of the technical talk. Let’s get to some pictures of how this all looks in the field...

Keystone Jacks Used for Patch Panels

Here is an example of a shielded keystone jack patch panel. The solid copper Ethernet cable is coming in from outside, dropping down from a PVC pipe, and then the runs are terminated into the shielded keystone jacks. At the remote ends of these cable runs are other keystones in a remote structure, WiFi Access Points, and PoE surveillance cameras.

 

Shielded tool-less keystones mounted in a metal patch panel frame. Notice the patch cables plugged into the keystone jacks.

 

Another view. Some ports are filled, and some are not.

 

The patch cables connect from the keystone jacks into a network switch…each run gets its own dedicated switch port

The patch cables connect from the keystone jacks into a network switch…each run gets its own dedicated switch port


Keystone Jacks Wall Mounted with a Face Plate

These examples are at the far end of the Ethernet runs that end up at the shielded patch panel shown in the previous pictures.

Six port, single gang faceplate with shielded keystones mounted

 

Remote part of the installation showing keystone jacks, network switch, cable modem, and live view monitoring of network cameras

Patch cables connect this remote network switch to the in-wall keystones

 

Remote part of the installation showing keystone jacks, network switch, cable modem, and live view monitoring of network cameras

Remote part of the installation showing keystone jacks, network switch, cable modem, and live view monitoring of network cameras


Floor Monuments

 

Example floor monument with multiple types of connectivity, including Ethernet

Example floor monument with multiple types of connectivity, including Ethernet



So, there are some keystone jacks in the wild! Seeing them in operation helps bring their usefulness and application into focus. They offer a great deal of flexibility when relocating equipment around a room (you only need to buy a slightly longer patch cable for example) and make installations tidy.


HAPPY NETWORKING! 


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