What Is the UHD-FOUC10-K?
The OREI UHD-FOUC10-K is a 4K@60Hz USB-C over fiber optic extender kit that extends one USB-C DisplayPort Alt Mode source to one USB-C display over fiber optic cable. It supports transmission up to 10km using single-mode fiber optic cable and up to 300m / 1000ft using multi-mode OM4 fiber cable.
The kit includes one Transmitter, one Receiver, two power adapters, and a user manual. The USB-C source connects to IN on the Transmitter, the remote USB-C display connects to OUT on the Receiver, and fiber optic cable connects the SFP+ OUT port on the Transmitter to the SFP+ IN port on the Receiver.
The UHD-FOUC10-K supports USB Type-C 1.1 DisplayPort Alt Mode and HDCP 2.3 / 2.2 / 1.x, with a video bandwidth of 32.4Gbps. It supports HBR3 bandwidth, video resolutions up to 4K@60Hz 4:4:4, any standard VESA resolution, HDR10, HDR10+, Dolby Vision, HLG, LPCM, Dolby Digital, Dolby TrueHD, Dolby Atmos, DTS-HD Master Audio, and DTS:X.
The UHD-FOUC10-K is useful for long-distance USB-C video extension, commercial AV, conference rooms, classrooms, control rooms, medical spaces, industrial environments, digital signage, security monitoring, and installations where reliable 4K@60Hz USB-C video transmission over fiber optic cable is required.
IMPORTANT — UHD-FOUC10-K Uses USB-C DisplayPort Alt Mode
The UHD-FOUC10-K extends USB-C video using DisplayPort Alt Mode.
| Connection | Function |
| USB-C cable | Source to Transmitter and Receiver to display |
| Fiber optic cable | Main signal extension |
| SFP+ port | Fiber optic connection between Transmitter and Receiver |
The USB-C source must support DisplayPort Alt Mode for video output.
This model does not use CAT cable for the extension path.
IMPORTANT — Supports up to 10km Over Single-Mode Fiber
The UHD-FOUC10-K supports long-distance USB-C video transmission over fiber.
| Fiber Type | Maximum Distance |
| Single-mode fiber optic cable | Up to 10km |
| Multi-mode OM4 fiber optic cable | Up to 300m / 1000ft |
For the longest distance, use single-mode fiber optic cable.
Multi-mode OM4 fiber can be used, but the distance is reduced to 300m / 1000ft.
IMPORTANT — Supports 4K@60Hz 4:4:4
The UHD-FOUC10-K supports video resolutions up to 4K@60Hz 4:4:4.
| Feature | Support |
| 4K@60Hz 4:4:4 | Supported |
| USB Type-C 1.1 DisplayPort Alt Mode | Supported |
| HDCP 2.3 / 2.2 / 1.x | Supported |
| Video bandwidth | 32.4Gbps |
| HBR3 | Supported |
| Any standard VESA resolution | Supported |
| HDR10 | Supported |
| HDR10+ | Supported |
| Dolby Vision | Supported |
| HLG | Supported |
To get 4K@60Hz, the USB-C source, display, USB-C cables, fiber cable, SFP+ modules, and source output settings must all support the required signal.
IMPORTANT — Single USB-C Source to Single USB-C Display
The UHD-FOUC10-K extends one USB-C source to one USB-C display.
| Function | Support |
| 1 USB-C input | Supported |
| 1 USB-C output | Supported |
| Point-to-point USB-C video extension | Supported |
| One source to one display | Supported |
| Multiple displays | Not supported by itself |
| Matrix switching | Not supported |
| Extended desktop creation by itself | Not supported |
This product is a point-to-point USB-C fiber extender. It is not a splitter, switch, docking station, or matrix.
IMPORTANT — Both Units Need Power
The UHD-FOUC10-K includes two power adapters.
| Unit | Power Requirement |
| Transmitter | DC 5V/1A |
| Receiver | DC 5V/1A |
Both the Transmitter and Receiver must be powered for the extender to work.
If either unit does not power on, check the power adapter, outlet, DC 5V connection, and power indicator.
IMPORTANT — No USB Data Extension Listed
The UHD-FOUC10-K is designed for USB-C DisplayPort Alt Mode video and audio extension.
The manual does not list USB data device extension for keyboard, mouse, webcam, USB drive, or other USB peripherals.
| Feature | Support |
| USB-C video extension | Supported |
| USB-C audio pass-through | Supported |
| USB keyboard / mouse extension | Not listed |
| USB data device extension | Not listed |
| USB charging / power delivery | Not listed |
For USB device extension, use a dedicated USB extender model.
IMPORTANT — No USB-C Loop Out Listed
The UHD-FOUC10-K manual lists IN on the Transmitter and OUT on the Receiver.
It does not list USB-C loop output on the Transmitter.
| Unit | USB-C Port |
| Transmitter | IN |
| Receiver | OUT |
If a local display is needed near the source, use a compatible USB-C / DisplayPort splitter solution before the Transmitter or choose a different solution that supports local loop output.
IMPORTANT — Audio Pass-Through Is Supported
The UHD-FOUC10-K supports audio pass-through.
Supported audio formats include:
| Supported Audio |
| LPCM |
| LPCM 7.1CH |
| Dolby Digital |
| Dolby Digital Plus |
| Dolby Digital EX |
| Dolby TrueHD |
| Dolby Atmos |
| DTS |
| DTS-EX |
| DTS-96/24 |
| DTS High Res |
| DTS-HD Master Audio |
| DTS:X |
The connected USB-C source, display, monitor, AVR, soundbar, or audio system must also support the selected audio format.
Ports and Panel Layout
| Port / Button / Indicator | Unit | Function |
| IN | Transmitter | Connect USB-C source device with DisplayPort Alt Mode |
| LINK Indicator | Transmitter | Green LED lights when there is a proper fiber connection between Transmitter and Receiver |
| SERVICE Port | Transmitter | Firmware update port |
| SFP+ OUT | Transmitter | Connect fiber optic cable using an SFP module; the other end connects to the Receiver |
| POWER Indicator | Transmitter | Green LED lights when the Transmitter is powered on |
| DC 5V | Transmitter | Connect included power adapter |
| OUT | Receiver | Connect USB-C display device such as monitor or display |
| LINK Indicator | Receiver | Green LED lights when there is a proper fiber connection between Transmitter and Receiver |
| SERVICE Port | Receiver | Firmware update port |
| SFP+ IN | Receiver | Connect fiber optic cable using an SFP module; the other end connects to the Transmitter |
| POWER Indicator | Receiver | Green LED lights when the Receiver is powered on |
| DC 5V | Receiver | Connect included power adapter |
Step-by-Step Setup
- Connect the USB-C source device to IN on the Transmitter.
Examples include a laptop, desktop computer, workstation, media system, or USB-C source device that supports DisplayPort Alt Mode.
- Connect the remote USB-C display to OUT on the Receiver.
- Connect fiber optic cable from SFP+ OUT on the Transmitter to SFP+ IN on the Receiver.
- Connect the included DC 5V/1A power adapter to the Transmitter.
- Connect the included DC 5V/1A power adapter to the Receiver.
- Power on the USB-C source, display, Transmitter, and Receiver.
- Check that the POWER indicator is on for both units.
- Check that the LINK indicator is on for both units.
- Test video and audio at the remote USB-C display.
- If video does not display, lower the source resolution, check the fiber cable, check the LINK LEDs, and test with different USB-C cables.
Fiber Cable Requirement — Critical
Use the correct fiber cable for the required distance.
| Fiber Type | Maximum Distance |
| Single-mode fiber optic cable | Up to 10km |
| Multi-mode OM4 fiber optic cable | Up to 300m / 1000ft |
Poor or incorrect fiber cable may cause:
- No video
- Flickering
- Black screen
- LINK LED not lighting
- Signal dropouts
- Unstable 4K@60Hz performance
- Audio dropouts
- Display not detected
Keep fiber connectors clean and avoid bending the fiber cable beyond its safe bend radius.
USB-C Cable Requirement — Critical
Use high-quality USB-C cables that support video output.
| Cable Requirement | Details |
| Source cable | USB-C cable must support DisplayPort Alt Mode video |
| Display cable | USB-C cable must support video display connection |
| 4K@60Hz support | Source, cable, extender, and display must all support the required signal |
Poor or incompatible USB-C cables may cause:
- No picture
- Flickering
- Black screen
- HDR issues
- Display not detected
- Wrong resolution
- Receiver OUT not working
- HDCP handshake issues
- Audio dropouts
For troubleshooting, test the USB-C source directly with the display before using the extender.
Power Requirement — Critical
The UHD-FOUC10-K uses two DC 5V/1A power adapters.
| Unit | Power |
| Transmitter | DC 5V/1A |
| Receiver | DC 5V/1A |
| Power Detail | Value |
| Power adapter input | AC 100–240V, 50/60Hz |
| Power adapter output | DC 5V/1A |
| Transmitter power consumption | 2.7W max |
| Receiver power consumption | 2.5W max |
Both units require external power. This model does not use Power over Cable.
Understanding the Transmitter
The Transmitter is installed near the USB-C source.
It has:
- USB-C IN
- LINK indicator
- SERVICE port
- SFP+ OUT
- POWER indicator
- DC 5V power input
The Transmitter receives USB-C DisplayPort Alt Mode video from the source and sends the signal over fiber optic cable to the Receiver.
Understanding the Receiver
The Receiver is installed near the remote USB-C display.
It has:
- USB-C OUT
- LINK indicator
- SERVICE port
- SFP+ IN
- POWER indicator
- DC 5V power input
The Receiver receives the fiber signal from the Transmitter and outputs USB-C video to the connected display.
Understanding the Application Example
The application diagram shows a PC connected to the Transmitter using USB-C. The Transmitter connects to the Receiver using single-mode fiber optic cable. The Receiver connects to a monitor using USB-C. Both the Transmitter and Receiver are connected to their own power supplies.
This shows the main use case: extending one USB-C DisplayPort Alt Mode source to one remote USB-C display over long-distance fiber optic cable.
Understanding LINK and POWER Indicators
| Indicator | Unit | Status | Meaning |
| POWER Indicator | Transmitter | Green on | Transmitter is powered on |
| POWER Indicator | Receiver | Green on | Receiver is powered on |
| LINK Indicator | Transmitter | Green on | Proper fiber connection between Transmitter and Receiver |
| LINK Indicator | Receiver | Green on | Proper fiber connection between Transmitter and Receiver |
If the LINK indicator does not light on both units, check the fiber cable, SFP+ connection, cable type, and both power adapters.
Supported Video and Audio
The UHD-FOUC10-K supports video formats including:
| Supported Video |
| 4096x2160p60 |
| 4096x2160p50 |
| 3840x2160p60 |
| 3840x2160p50 |
| 3840x2160p30 |
| 3840x2160p25 |
| 1920x1200p60RB |
| 1920x1080p60 |
| 1920x1080p50 |
| 1360x768p60 |
| 1280x800p60 |
| 1280x720p60 |
| 1280x720p50 |
| 1024x768p60 |
| Any VESA resolution |
| RGB |
| YCbCr 4:4:4 |
| YCbCr 4:2:2 |
| YUV 4:2:0 |
| 8-bit color |
| 10-bit color |
| 12-bit color |
| HDR10 |
| HDR10+ |
| Dolby Vision |
| HLG |
Supported audio formats include:
| Supported Audio |
| LPCM |
| LPCM 7.1CH |
| Dolby Digital |
| Dolby Digital Plus |
| Dolby Digital EX |
| Dolby TrueHD |
| Dolby Atmos |
| DTS |
| DTS-EX |
| DTS-96/24 |
| DTS High Res |
| DTS-HD Master Audio |
| DTS:X |
Supported Technical Specifications
| Specification | Support |
| Product Type | 4K@60Hz USB-C DisplayPort Alt Mode over fiber optic extender |
| USB-C Compliance | USB Type-C 1.1 DisplayPort Alt Mode |
| HDCP Version | HDCP 2.3 / 2.2 / 1.x |
| Video Bandwidth | 32.4Gbps |
| Link Rate | HBR3, 8.1Gbps per lane |
| Maximum Resolution | 4K@60Hz 4:4:4 |
| VESA Resolution | Any standard VESA resolution supported |
| HDR | HDR10, HDR10+, Dolby Vision, HLG |
| Color Space | RGB, YCbCr 4:4:4 / 4:2:2, YUV 4:2:0 |
| Color Depth | 8-bit, 10-bit, 12-bit |
| Audio | LPCM, Dolby Digital / Plus / EX, Dolby TrueHD, Dolby Atmos, DTS, DTS-EX, DTS-96/24, DTS High Res, DTS-HD Master Audio, DTS:X |
| Fiber Optic | 10G SFP+ module |
| Single-Mode Fiber Distance | Up to 10km |
| Multi-Mode OM4 Fiber Distance | Up to 300m / 1000ft |
| Transmitter Input | USB-C IN, USB-C SERVICE |
| Transmitter Output | SFP+ OUT |
| Receiver Input | SFP+ IN, USB-C SERVICE |
| Receiver Output | USB-C OUT |
| Power Supply | DC 5V/1A |
| Transmitter Power Consumption | 2.7W max |
| Receiver Power Consumption | 2.5W max |
| Housing | Metal enclosure |
| Color | Black |
| Dimensions | 81mm x 49mm x 25mm |
| Transmitter Weight | 138g |
| Receiver Weight | 138g |
| Operating Temperature | 0°C to 40°C / 32°F to 104°F |
| Storage Temperature | -20°C to 60°C / -4°F to 140°F |
| Operating Humidity | 20%–80% RH, non-condensing |
| Storage Humidity | 10%–90% RH, non-condensing |
| ESD Protection | ±8kV air-gap discharge, ±4kV contact discharge |
What Source Devices Is the UHD-FOUC10-K Compatible With?
The UHD-FOUC10-K is compatible with USB-C source devices that support DisplayPort Alt Mode, such as:
- Laptops with USB-C video output
- Desktop PCs with USB-C DisplayPort Alt Mode output
- Workstations
- USB-C media systems
- Graphics systems with USB-C video output
- Control room computers
- Commercial AV source systems
The source must output a supported USB-C DisplayPort Alt Mode resolution up to 4K@60Hz.
What Displays Is the UHD-FOUC10-K Compatible With?
The UHD-FOUC10-K can connect to USB-C displays such as:
- USB-C monitors
- 4K USB-C displays
- 1080p USB-C displays
- Commercial displays with USB-C video input
- Control room monitors
- Medical displays
- Industrial displays
- Conference room monitors
- Remote workstation displays
For 4K@60Hz, the display must support 4K@60Hz over USB-C video input.
Frequently Asked Questions
Q: What is the OREI UHD-FOUC10-K used for?
A: It is used to extend one USB-C DisplayPort Alt Mode source to one remote USB-C display over fiber optic cable up to 10km.
Q: Does the UHD-FOUC10-K support 4K@60Hz?
A: Yes. It supports video resolutions up to 4K@60Hz 4:4:4.
Q: Does the source USB-C port need to support video output?
A: Yes. The source USB-C port must support DisplayPort Alt Mode.
Q: Does it support USB data extension?
A: USB data extension is not listed in the manual. This model is for USB-C DisplayPort Alt Mode video and audio extension.
Q: Does it support USB charging or Power Delivery?
A: USB Power Delivery / charging is not listed in the manual.
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 USB-C standard does it support?
A: It supports USB Type-C 1.1 DisplayPort Alt Mode.
Q: What HDCP version does it support?
A: It supports HDCP 2.3, HDCP 2.2, and HDCP 1.x.
Q: What video bandwidth does it support?
A: It supports 32.4Gbps video bandwidth.
Q: Does it support HDR?
A: Yes. It supports HDR10, HDR10+, Dolby Vision, and HLG.
Q: Does it support Dolby Vision?
A: Yes. Dolby Vision is listed as supported.
Q: Does it support Dolby Atmos?
A: Yes. Dolby Atmos is listed as supported.
Q: How far can it extend over single-mode fiber?
A: It extends up to 10km over single-mode fiber optic cable.
Q: Can I use multi-mode fiber optic cable?
A: Yes. Multi-mode OM4 cable can be used, but the transmission distance drops to 300m / 1000ft.
Q: What fiber connection does it use?
A: It uses a 10G SFP+ fiber optic connection.
Q: Does it use CAT cable?
A: No. This model extends USB-C video over fiber optic cable, not CAT cable.
Q: Is this AV over IP?
A: No. It is a point-to-point USB-C over fiber extender.
Q: Does it support Power over Cable?
A: No. Both the Transmitter and Receiver require their own DC 5V power adapters.
Q: Do both units need power adapters?
A: Yes. The package includes two power adapters, one for the Transmitter and one for the Receiver.
Q: What power adapter does it use?
A: It uses DC 5V/1A power adapters.
Q: Does the Transmitter have USB-C loop out?
A: No USB-C loop output is listed for this model.
Q: Does it support IR control?
A: IR control is not listed for this model.
Q: Does it support RS-232?
A: RS-232 is not listed for this model.
Q: Does it support audio extraction?
A: Audio extraction is not listed for this model.
Q: Does it support audio pass-through?
A: Yes. It supports audio pass-through through the USB-C video signal.
Q: What audio formats are supported?
A: It supports LPCM, Dolby Digital, Dolby TrueHD, Dolby Atmos, DTS-HD Master Audio, and DTS:X.
Q: What does the LINK indicator mean?
A: The LINK indicator lights green when there is a proper fiber optic connection between the Transmitter and Receiver.
Q: What does the POWER indicator mean?
A: The POWER indicator lights green when the unit is powered on.
Q: What should I do if there is no video or the display is flickering?
A: Try lowering the resolution from the media source, try changing the USB-C cable or fiber optic cable, and check whether the LINK LED is lighting on both ends.
Q: Can I use a DisplayPort to HDMI converter?
A: The manual recommends making sure you are not using a DisplayPort to HDMI converter when troubleshooting no video or flickering.
Q: What should I do if the LINK LED is not lighting?
A: Check the fiber optic cable, SFP+ connection, fiber type, both power adapters, and confirm the Transmitter and Receiver are connected correctly.
Q: Does the UHD-FOUC10-K need external power?
A: Yes. Both the Transmitter and Receiver require the included DC 5V/1A power adapters.
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