UHD41-EX230-KVM Overview and Use Cases

What Is the UHD41-EX230-KVM?

The OREI UHD41-EX230-KVM is a 4K@60Hz 4x1 HDMI KVM extender switch. It allows up to four HDMI source devices or computers to share one HDMI display, keyboard, and mouse, while extending the selected HDMI and USB signal to the Receiver over CAT 6 / CAT 6A / CAT 7 cable.

The kit includes a Transmitter switch and Receiver. The HDMI sources connect to the Transmitter, the display connects to the Receiver, and a CAT cable connects the Transmitter to the Receiver.

The UHD41-EX230-KVM supports HDMI 2.0, HDCP 2.2 / 1.4, with a video bandwidth of 18Gbps. It supports video resolutions up to 4K@60Hz, four HDMI inputs, KVM function for USB 2.0 devices, input switching by front-panel button, IR remote control, and RS-232 commands, EDID passthrough, auto downscaling, HDR10, and transmission up to 70m over CAT 6 / CAT 6A / CAT 7 cable.

The UHD41-EX230-KVM is useful for offices, control rooms, security monitoring, education and training rooms, exhibitions, broadcasting, command centers, conference rooms, and workstations where multiple computers need to share one remote display, keyboard, and mouse.

IMPORTANT — UHD41-EX230-KVM Is a 4x1 HDMI KVM Extender Switch

The UHD41-EX230-KVM is not just a standard HDMI extender.

It combines:

This allows one display, keyboard, and mouse to control up to four connected computers or HDMI sources.

IMPORTANT — UHD41-EX230-KVM Supports 4K@60Hz

The UHD41-EX230-KVM supports video resolutions up to 4K@60Hz.

To get 4K@60Hz, the HDMI source, HDMI display, HDMI cables, CAT cable, and source settings must all support 4K@60Hz.

If 4K@60Hz does not work, confirm the source output is set correctly and use HDMI cables rated for 4K@60Hz.

IMPORTANT — Maximum Distance Is up to 70m

The UHD41-EX230-KVM extends HDMI over CAT 6 / CAT 6A / CAT 7 cable up to 70m.

The manual also notes that some higher-resolution formats are limited to shorter distances.

For best performance, use high-quality CAT 6 or better cable.

IMPORTANT — Use a Direct CAT Cable Connection

The UHD41-EX230-KVM should be connected directly from the Transmitter RJ45 output to the Receiver RJ45 input.

Do not connect it through:

1. Network switch
2. Router
3. Internet network
4. LAN switch
5. Ethernet wall network system used as a network path 
    
   This product is not an AV-over-IP extender. The CAT cable is used as a direct HDMI and KVM extension cable between the Transmitter and Receiver.

IMPORTANT — Four HDMI Inputs Are Supported

The Transmitter has four HDMI input ports.

Each HDMI input can be connected to a different HDMI source or computer.

Examples:

1. PC 1
2. PC 2
3. PC 3
4. PC 4
5. Laptop
6. DVR / NVR
7. Media player
8. HDMI source device 
    
   Only one HDMI input is displayed at a time.

IMPORTANT — KVM Function Requires USB Connections From Each Computer

To use keyboard and mouse control, connect the USB cable from each computer to the matching USB Type-B port on the Transmitter.

The package includes four USB 2.0 Type-A to Type-B cables.

The keyboard and mouse connect to the USB Type-A ports on the Receiver.

If the USB cables are not connected, video may still work, but keyboard and mouse control will not work.

IMPORTANT — Multiple Switching Methods Are Supported

The UHD41-EX230-KVM supports multiple switching methods:

This allows switching between HDMI 1, HDMI 2, HDMI 3, and HDMI 4 from the remote display location.

IMPORTANT — RS-232 Control Is Supported

The Receiver includes an RS-232 port for command control.

The manual lists the RS-232 settings as:

RS-232 commands can be used to switch inputs, reset, restore factory settings, query status, and set baud rate.

IMPORTANT — Power Is Required on Both Ends

The package includes two DC 5V/1A power adapters.

This means both the Transmitter and Receiver need their own power connection.

This model does not list Power over Cable.

Connect one power adapter to the Transmitter and the second power adapter to the Receiver.

IMPORTANT — EDID Passthrough and Auto Downscaling Are Supported

The UHD41-EX230-KVM supports EDID passthrough and auto downscaling.

EDID passthrough helps the HDMI source detect the connected display’s supported resolution and audio format.

Auto downscaling can help when the selected source outputs a higher resolution than the display can support.

If there is no video or the wrong resolution appears, check the source resolution, HDMI cables, CAT cable, and display capability.

IMPORTANT — No HDMI Loop Out

The UHD41-EX230-KVM does not include HDMI loop out.

It has:

1. Four HDMI inputs on the Transmitter
2. One HDMI output on the Receiver 
    
   If a local display is needed near the source computers, use a separate HDMI splitter or a different switch/extender model with local loop output.

IMPORTANT — No Separate Audio Extraction Output

The UHD41-EX230-KVM does not include Optical, Coaxial, RCA, or 3.5mm audio extraction.

Audio passes through HDMI to the connected HDMI display or HDMI audio device.

If separate audio extraction is needed, use a model with built-in audio output.

Ports and Panel Layout

Step-by-Step Setup

1. Connect HDMI source devices or computers to the HDMI inputs on the Transmitter. 
   Examples include PC 1, PC 2, PC 3, PC 4, laptops, DVRs, media players, or other HDMI sources.
2. If using KVM, connect each computer’s USB port to the matching USB Type-B port on the Transmitter using the included USB 2.0 Type-A to Type-B cables.
3. Connect RJ45 output on the Transmitter to RJ45 input on the Receiver using CAT 6 / CAT 6A / CAT 7 cable.
4. Connect the HDMI display to HDMI output on the Receiver.
5. Connect keyboard and mouse to the USB Type-A ports on the Receiver.
6. Connect one DC 5V/1A power adapter to the Transmitter.
7. Connect the second DC 5V/1A power adapter to the Receiver.
8. Power on the HDMI sources, display, Transmitter, and Receiver.
9. Use the Switch button, IR remote, or RS-232 commands to select HDMI input 1, 2, 3, or 4.
10. Test video, audio, keyboard, mouse, and input switching.

CAT Cable Requirement — Critical

Use high-quality CAT 6 / CAT 6A / CAT 7 cable.

Poor-quality, damaged, or incorrectly terminated CAT cable may cause:

1. No video
2. Flickering
3. Black screen
4. Poor color
5. HDMI signal not connecting
6. KVM not working
7. Input switching issues
8. 4K@60Hz not working
9. Signal dropouts 
    
   Do not connect the CAT cable through a network switch or router.

HDMI Cable Requirement — Critical

Use high-quality HDMI cables that support the resolution being used.

Poor HDMI cables may cause:

1. No picture
2. Flickering
3. Black screen
4. 4K@60Hz not working
5. HDR10 not working
6. Audio dropouts
7. HDCP handshake issues 
    
   For troubleshooting, test each HDMI source directly with the display before using the extender switch.

USB Cable Requirement — Critical

For KVM control, each computer must be connected to the Transmitter using USB.

The package includes four USB 2.0 Type-A to Type-B cables.

If keyboard or mouse control does not work:

1. Confirm the USB cable is connected from the computer to the correct USB Type-B port on the Transmitter
2. Confirm keyboard and mouse are connected to the Receiver USB Type-A ports
3. Check the KVM indicators
4. Switch to the correct HDMI input

Understanding the Transmitter

The Transmitter is installed near the source computers or HDMI source devices.

It has:

1. Four HDMI inputs
2. Four USB Type-B ports for KVM computer connections
3. RJ45 output to the Receiver
4. Reset button
5. KVM indicator
6. Power / Signal indicator
7. DC 5V power input 
    
   The Transmitter sends the selected HDMI and USB KVM signal to the Receiver over CAT cable.

Understanding the Receiver

The Receiver is installed near the display, keyboard, and mouse.

It has:

1. RJ45 input from the Transmitter
2. HDMI output to the display
3. USB Type-A ports for keyboard and mouse
4. Switch button
5. IR receiving window
6. HDMI input indicators
7. RS-232 control port
8. Reset button
9. KVM indicator
10. Power / Signal indicator
11. DC 5V power input 
     
    The Receiver lets the user view the selected source and control the selected computer.

Understanding 4x1 Switching

4x1 means four inputs and one output.

The UHD41-EX230-KVM can connect up to four HDMI sources but only one source is shown on the output display at a time.

Example:

This is useful when multiple computers need to share one remote monitor, keyboard, and mouse.

Understanding KVM Function

KVM means keyboard, video, and mouse.

The UHD41-EX230-KVM allows keyboard and mouse control from the Receiver side.

Basic KVM setup:

When switching HDMI inputs, keyboard and mouse control follows the selected computer when the USB connections are correctly installed.

Understanding the KVM Indicator

The KVM indicator shows USB/KVM status.

Use this indicator when troubleshooting keyboard or mouse control.

Understanding the Power / Signal Indicator

The Power / Signal indicator shows power and HDMI signal status.

Use this indicator when troubleshooting no video or unstable signal.

Understanding RS-232 Commands

The UHD41-EX230-KVM supports RS-232 command control.

RS-232 settings:

Common RS-232 commands:

If no HDMI port is inserted, the status may display NA.

If HDMI 2 was the last inserted or selected, the status may display PS12R.

Understanding EDID Passthrough and Auto Downscaling

EDID passthrough helps the selected HDMI source detect the connected display’s capabilities.

Auto downscaling can help improve compatibility when the source is outputting a signal that may need to be reduced for the connected display.

If the display does not show video:

1. Try lowering the source resolution
2. Test with 1080p@60Hz
3. Check HDMI cable quality
4. Check CAT cable quality
5. Restart the Transmitter and Receiver

Supported Video and Audio

The UHD41-EX230-KVM supports video resolutions including:

Supported audio formats include:

Supported features:

What Source Devices Is the UHD41-EX230-KVM Compatible With?

The OREI UHD41-EX230-KVM is compatible with HDMI source devices such as:

1. Desktop PCs
2. Laptops with HDMI output
3. DVRs
4. NVRs
5. Media players
6. Blu-ray players
7. DVD players
8. Cable boxes
9. Satellite receivers
10. Set-top boxes
11. HDMI monitoring equipment
12. Game consoles with supported HDMI output 
     
    For KVM control, each computer must also connect to the matching USB Type-B port on the Transmitter.

What Displays Is the UHD41-EX230-KVM Compatible With?

The UHD41-EX230-KVM can connect to HDMI displays such as:

1. 4K TVs
2. 1080p TVs
3. Monitors
4. Projectors
5. Commercial displays
6. Control room displays
7. Classroom displays
8. Conference room displays
9. Security monitoring displays
10. Broadcasting displays 
     
    For 4K@60Hz, the display must support 4K@60Hz input.

What USB Devices Is the UHD41-EX230-KVM Compatible With?

The KVM function is designed for:

1. USB keyboard
2. USB mouse 
    
   The manual lists KVM function for USB 2.0 devices. 
    
   For best results, use standard wired keyboard and mouse devices.

Frequently Asked Questions

Q: What is the OREI UHD41-EX230-KVM used for? 
A: The UHD41-EX230-KVM is used to connect up to four HDMI computers or source devices to one remote HDMI display, keyboard, and mouse over CAT 6 / CAT 6A / CAT 7 cable.

Q: Is this a 4x1 switch? 
A: Yes. It supports four HDMI inputs and one HDMI output.

Q: Does the UHD41-EX230-KVM support KVM? 
A: Yes. It supports USB 2.0 KVM function for keyboard and mouse control.

Q: Does it support 4K@60Hz? 
A: Yes. It supports video resolutions up to 4K@60Hz.

Q: Does it support 8K? 
A: No. It supports up to 4K@60Hz.

Q: Does it support 4K@120Hz? 
A: No. It does not support 4K@120Hz.

Q: What HDMI version does it support? 
A: It supports HDMI 2.0.

Q: What HDCP version does it support? 
A: It supports HDCP 2.2 and HDCP 1.4.

Q: What video bandwidth does it support? 
A: It supports 18Gbps transmission speed and 600MHz video bandwidth.

Q: Does it support HDR? 
A: Yes. HDR10 is supported.

Q: How far can it extend HDMI? 
A: It supports transmission up to 70m over CAT 6 / CAT 6A / CAT 7 cable.

Q: Are all resolutions supported up to 70m? 
A: No. The manual lists some high-resolution formats such as 4096x2160@24/25/30Hz, 3440x1440, 2560x1600, and 2560x1440 as up to 40m.

Q: What CAT cable should I use? 
A: Use high-quality CAT 6 / CAT 6A / CAT 7 cable.

Q: Can I connect it through a network switch or router? 
A: No. The Transmitter and Receiver should be connected directly with CAT cable.

Q: Does it need power on both ends? 
A: Yes. The package includes two DC 5V/1A power adapters, one for the Transmitter and one for the Receiver.

Q: Does it support Power over Cable? 
A: No Power over Cable function is listed in the manual.

Q: Does the Transmitter have HDMI loop out? 
A: No. This model does not include HDMI loop out.

Q: How do I switch between inputs? 
A: Use the Receiver front-panel switch button, IR remote control, or RS-232 commands.

Q: Does the Receiver have an IR window? 
A: Yes. The Receiver has an IR receiving window for the remote control.

Q: Does it support RS-232 control? 
A: Yes. RS-232 control is supported through the Receiver RS-232 port.

Q: What are the RS-232 settings? 
A: Baud rate 9600, data bits 8, stop character 1, parity none.

Q: What command selects HDMI 1? 
A: Use PS11R.

Q: What command selects HDMI 2? 
A: Use PS12R.

Q: What command selects HDMI 3? 
A: Use PS13R.

Q: What command selects HDMI 4? 
A: Use PS14R.

Q: How do I use keyboard and mouse control? 
A: Connect each computer’s USB port to the matching USB Type-B port on the Transmitter, then connect keyboard and mouse to the USB Type-A ports on the Receiver.

Q: Why does video work but keyboard and mouse do not? 
A: The USB cable may not be connected between the selected computer and the Transmitter, or the keyboard and mouse may not be connected properly to the Receiver.

Q: What does the KVM indicator mean? 
A: Light off means no USB connection, steady on means USB connection is established, and flashing means KVM data is transmitting.

Q: What does the Power / Signal indicator mean? 
A: Light off means no power, slow flashing means power but no HDMI signal, quick flashing means HDMI signal is connecting, and steady on means HDMI signal is transmitting.

Q: Does it support EDID passthrough? 
A: Yes. EDID passthrough is supported.

Q: Does it support auto downscaling? 
A: Yes. Auto downscaling is supported.

Q: Does it have separate audio output? 
A: No. This model does not include Optical, Coaxial, RCA, or 3.5mm audio extraction. Audio passes through HDMI.

Q: What audio formats are supported? 
A: The manual lists LPCM 7.1, DTS-HD, DTS-Audio, Dolby Digital Plus, Dolby TrueHD 5.1, Dolby Digital, and Dolby Atmos.

Q: What should I do if there is no video? 
A: Check both power adapters, confirm the correct input is selected, test the HDMI source directly with the display, check HDMI cables, check the CAT cable, and press Reset on the Transmitter and Receiver.

Q: What should I do if 4K@60Hz does not work? 
A: Use HDMI cables rated for 4K@60Hz, use high-quality CAT 6 / CAT 6A / CAT 7 cable, confirm the source and display support 4K@60Hz, and test with a shorter CAT cable.

Q: What should I do if RS-232 control does not work? 
A: Confirm the baud rate is 9600, data bits are 8, stop character is 1, parity is none, and the correct command format is used.

Q: Does the UHD41-EX230-KVM need external power? 
A: Yes. Connect one DC 5V/1A power adapter to the Transmitter and the second DC 5V/1A power adapter to the Receiver.