Rack Mount Termination Boxes / Enclosures

3 panel (1U) Swing Out Rack Mount LGX Chassis Fiber Optic Splice Box Enclosure with Splice Tray by QuickTreX®

SKU:QT-3PSO-FOSBE

5.0/5 (114 Reviews)
  • • Indoor
  • • 1U Rack Space
  • • 3 x LGX Adapter Panels
$135.00
Icon
12 Unit(s) available
At a Glance
  • Utilizes 1U Rack Space
  • Accomodates 3 LGX Adapter Panels
  • Includes (1) 2 x 12 Fiber Splice Tray
  • Up to 72 Fibers w/ Standard Adapters
  • Up to 432 Fibers w/ MTP/MPO Adapters
  • Fits Standard 19" and 23" Racks
  • Made of Cold Rolled Steel
  • Convenient Swing Out Tray
  • Black Matte Powder Coat Finish
  • Includes Hardware and Cable Wraps
Icon
estimated lead time
Estimated Lead Time
Typically Ships Within 24 Business Hours
(Cut off time is 2 PM EST)
Icon
expected receive dates
Receive Between
June 5-12, 2026
RoHs Compliant
Quality Control

Add Related Products

Our High Density QuickTreX® 3 panel (1U) Swing Out Rack Mount LGX Chassis Fiber Optic Splice Box Enclosure with Splice Tray is designed for interconnectivity and termination of optical fibers. It is perfect for small and medium installations such as FTTZ and FTTB.  It's formed with high quality cold rolled steel sheet and sprayed with electrostatic black matte paint.  This fiber optic splice box includes two stacked 12 fiber splice trays for a clean and organized install of your fiber optic fusion splices.  It includes a 90 degree swing out rotary tray for easy access and installation of your fiber optic splices and connect.   Included in this fiber optic splice box are four 21mm cable inlets at the back of the panel.  The dust apron can be cut according to usage.  

This product can support a wide array of up to three LGX dimensioned termination panels, modules, or cassettes. It's designed to fit standard 19" racks or 23" racks.  Included is a set of rabbit ear brackets to mount this box to 19" and 23" racks.  Also included are cable ties, heat shrink fusion splice sleeves, and screw and nut sets.

Includes: 

3-Panel 1U Swing Out Rack Mount Splice Box Enclosure
(1) 2 x 12 Fiber Splice Tray
(7) 4" Cable Ties
(8) 6-32 Pan Head Screws (for mounting bracket/rabbit ears)
(4) 10-32 Pan Head Screws with Nut (for mounting to rack)
 (24) 60mm Fiber Optic Splice Sleeves with steel rod

Specifications

Mounting Type
Rack Mount
Rack Size Compatibility
19" and 23"
Chassis Type
LGX
Rack Unit Space
1U
Panel Count
3 Panel
Adapter Panel Options
See Dropdown Menu
Material
Cold Rolled Steel
Color / Finish
Black Matte Powder Coat
Dimensions
1.75"H x 17"W x 10"D
Hardware
Included
Fiber Strand Capacity
72 w/ Stnd. Adapters & 432 w/ MTP/MPO

Resources

PDF Document
General: 3 Panel 1U SPECIFICATIONS
Asset

Help Article
Fiber Optic Definitions
Helpful

Help Article
Pre-Terminated Fiber Optic Assemblies Guide
Helpful

Videos

When You Place An Order

Step 01
Step 01
Place Your Order
Our team processes your order within 24 business hours.
Step 02
Step 02
Get Notifications
You receive emails about your order status.
Step 04
Step 03
Track Your Order
Get tracking on your shipment until delivery.

Product Reviews (114)

5

5
101% Complete
101%
4
0% Complete
0%
3
0% Complete
0%
2
0% Complete
0%
1
0% Complete
0%
J
John

10/23/2025 10:30:00 PM

Everything was delivered in a timely manner and worked without issue! I will be using LANshack for all of our cable and fiber needs in the future! Thanks guys!

Icon
Reply from LANshack
10/28/2025 06:02:00 PM

HI John, That is excellent to hear! Thank you for taking the time to provide a review. As we always say, if you ever need help finding any products or have any questions please don't hesitate to reach out. Sincerely, LANshack

C
customer

05/30/2025 11:21:00 PM

great options

C
customer

05/22/2025 10:11:00 PM

LANshack really was accommodating and very helpful with my fiber needs. They went to every extent to make sure our network was up and running in no time!

C
customer

05/19/2025 11:21:00 PM

Great customer service. Products in stock.

SP
Sylvain Piette

05/14/2025 01:47:00 PM

Easy to order from website, fast shipping

Questions & Answers

Q
What is a fiber optic enclosure?
A
A fiber optic enclosure is a protective housing designed to organize, manage, and safeguard fiber optic connections, splices, and terminations. It acts as the central point where fiber optic cables are brought together, connected, and distributed while ensuring protection from environmental, mechanical, and handling damage.
Q
What is a rack mount fiber optic enclosure?
A
Rack mount enclosures are designed to be installed in standard 19" or 23" racks in telecommunication rooms/closets or data centers.
Q
What are the different types of chassis in fiber optic enclsoures?
A
The three main chassis are LGX, SHD, and UHD. LGX is the most common and standardized chassis type.
Q
What does the 1, 2, 4, 6, or 12 "U" mean when talking about rack mount fiber optic enclosures?
A
The "U" stands for rack unit and it’s the standard measurement used to describe the vertical space equipment takes up in a 19 inch or 23 inch equipment rack. 1U equals 1.75 inches in height.
Q
How many fiber strands can fit into a fiber optic enclosure?
A
The amount of fiber strands that you can fit into an enclosure will depend on how many panels or adapters you can fit and what type of connectors you choose. For example, if you choose a 1 panel enclosure and use a 12LC adapter panel, you can house or couple 12 fibers in that enclosure. If you use 12 MTP/MPO adapter panel, you can house or couple 144 or 288 strands depending on whether the MTP or MPO connector being connected is a 12 or 24 fiber connector.

Don’t Just Take Our Word For It

Read 1,438 reviews on