What Is the UHD-FOHD10-K?
The OREI UHD-FOHD10-K is a 4K@60Hz HDMI over fiber optic extender kit that extends one HDMI source to one HDMI 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 HDMI source connects to HDMI IN on the Transmitter, the remote display connects to HDMI 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-FOHD10-K supports HDMI 2.0b and HDCP 2.2, with a video bandwidth of 18Gbps. It supports video resolutions up to 4K@60Hz and 2K@60Hz, any VESA resolution, HDR10, HDR10+, Dolby Vision, HLG, LPCM, Dolby Digital, Dolby TrueHD, Dolby Atmos, DTS-HD Master Audio, and DTS:X.
The UHD-FOHD10-K is useful for long-distance HDMI extension, commercial AV, control rooms, classrooms, conference rooms, houses of worship, security monitoring, digital signage, auditoriums, medical spaces, and installations where reliable 4K@60Hz HDMI transmission over fiber optic cable is required.
IMPORTANT — UHD-FOHD10-K Uses Fiber Optic Cable
The UHD-FOHD10-K extends HDMI over fiber optic cable.
| Connection | Function |
| HDMI cable | Source to Transmitter and Receiver to display |
| Fiber optic cable | Main HDMI signal extension |
| SFP+ port | Fiber optic connection between Transmitter and Receiver |
This model does not use CAT cable for the HDMI extension path.
IMPORTANT — Supports up to 10km Over Single-Mode Fiber
The UHD-FOHD10-K supports long-distance HDMI 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
The UHD-FOHD10-K supports video resolutions up to 4K@60Hz.
| Feature | Support |
| 4K@60Hz | Supported |
| 2K@60Hz | Supported |
| Any VESA resolution | Supported |
| HDMI 2.0b | Supported |
| HDCP 2.2 | Supported |
| Video bandwidth | 18Gbps |
| HDR10 | Supported |
| HDR10+ | Supported |
| Dolby Vision | Supported |
| HLG | Supported |
To get 4K@60Hz, the HDMI source, display, HDMI cables, fiber cable, SFP+ modules, and source output settings must all support the required signal.
IMPORTANT — Single HDMI Source to Single HDMI Display
The UHD-FOHD10-K extends one HDMI source to one HDMI display.
| Function | Support |
| 1 HDMI input | Supported |
| 1 HDMI output | Supported |
| Point-to-point HDMI extension | Supported |
| One source to one display | Supported |
| Multiple displays | Not supported by itself |
| Matrix switching | Not supported |
| Extended desktop creation | Not supported |
This product is a point-to-point HDMI fiber extender. It is not a splitter, switch, or matrix.
IMPORTANT — Both Units Need Power
The UHD-FOHD10-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 HDMI Loop Out Listed
The UHD-FOHD10-K manual lists HDMI IN on the Transmitter and HDMI OUT on the Receiver.
It does not list HDMI loop output on the Transmitter.
| Unit | HDMI Port |
| Transmitter | HDMI IN |
| Receiver | HDMI OUT |
If a local display is needed near the source, use an HDMI splitter before the Transmitter or choose an extender model with HDMI loop output.
IMPORTANT — Audio Pass-Through Is Supported
The UHD-FOHD10-K supports HDMI audio pass-through.
Supported HDMI audio formats include:
| Supported Audio |
| LPCM |
| 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 HDMI source, display, AVR, soundbar, or audio system must also support the selected audio format.
Ports and Panel Layout
| Port / Button / Indicator | Unit | Function |
| HDMI IN | Transmitter | Connect HDMI source device such as DVD player, streaming device, PC, or media player |
| 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 |
| HDMI OUT | Receiver | Connect HDMI display such as TV, monitor, or projector |
| 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 HDMI source device to HDMI IN on the Transmitter.
Examples include a DVD player, Blu-ray player, streaming device, media player, laptop, desktop PC, DVR, NVR, HDMI matrix output, or HDMI switch output.
- Connect the remote display to HDMI 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 HDMI 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 display.
- If video does not display, lower the source resolution, check the fiber cable, check the LINK LEDs, and test with different HDMI 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
Keep fiber connectors clean and avoid bending the fiber cable beyond its safe bend radius.
HDMI Cable Requirement — Critical
Use high-quality HDMI cables, especially for 4K@60Hz.
Poor HDMI cables may cause:
- No picture
- Flickering
- Black screen
- HDR issues
- Dolby Vision issues
- HDMI source not detected
- Receiver HDMI OUT not working
- HDCP handshake issues
- Audio dropouts
For 4K@60Hz, use HDMI cables rated for 18Gbps.
For troubleshooting, test the HDMI source directly with the display before using the extender.
Power Requirement — Critical
The UHD-FOHD10-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 | 3.05W max |
| Receiver power consumption | 2.25W max |
Both units require external power. This model does not use Power over Cable.
Understanding the Transmitter
The Transmitter is installed near the HDMI source.
It has:
- HDMI IN
- LINK indicator
- SERVICE port
- SFP+ OUT
- POWER indicator
- DC 5V power input
The Transmitter receives HDMI from the source and sends the signal over fiber optic cable to the Receiver.
Understanding the Receiver
The Receiver is installed near the remote display.
It has:
- HDMI OUT
- LINK indicator
- SERVICE port
- SFP+ IN
- POWER indicator
- DC 5V power input
The Receiver receives the fiber signal from the Transmitter and outputs HDMI to the connected display.
Understanding the Application Example
The application diagram shows a PC connected to the Transmitter using HDMI. The Transmitter connects to the Receiver using single-mode fiber optic cable. The Receiver connects to a monitor using HDMI. Both the Transmitter and Receiver are connected to their own power supplies.
This shows the main use case: extending one HDMI source to one remote HDMI 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-FOHD10-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 |
| 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 HDMI over fiber optic extender |
| HDMI Version | HDMI 2.0b |
| HDCP Version | HDCP 2.2 |
| Video Bandwidth | 18Gbps |
| Maximum Resolution | 4K@60Hz and 2K@60Hz |
| VESA Resolution | Any 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 |
| HDMI 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 | At least 300m / 1000ft |
| Transmitter Input | HDMI IN, USB-C SERVICE |
| Transmitter Output | SFP+ OUT |
| Receiver Input | SFP+ IN, USB-C SERVICE |
| Receiver Output | HDMI OUT |
| Power Supply | DC 5V/1A |
| Transmitter Power Consumption | 3.05W max |
| Receiver Power Consumption | 2.25W 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-FOHD10-K Compatible With?
The UHD-FOHD10-K is compatible with HDMI source devices such as:
- Desktop PCs
- Laptops with HDMI output
- Blu-ray players
- DVD players
- Cable boxes
- Satellite receivers
- Streaming devices
- Media players
- DVRs
- NVRs
- Game consoles
- HDMI matrix outputs
- HDMI switch outputs
- AV receivers with HDMI output
The source must output a supported HDMI resolution up to 4K@60Hz.
What Displays Is the UHD-FOHD10-K Compatible With?
The UHD-FOHD10-K can connect to HDMI displays such as:
- 4K TVs
- 1080p TVs
- Monitors
- Projectors
- Commercial displays
- Classroom displays
- Conference room displays
- Control room displays
- Auditorium displays
- Retail displays
- Digital signage displays
- Remote display locations
For 4K@60Hz, the display must support 4K@60Hz input.
Frequently Asked Questions
Q: What is the OREI UHD-FOHD10-K used for?
A: It is used to extend one HDMI source to one remote HDMI display over fiber optic cable up to 10km.
Q: Does the UHD-FOHD10-K support 4K@60Hz?
A: Yes. It supports video resolutions up to 4K@60Hz.
Q: Does it support 2K@60Hz?
A: Yes. It supports 2K@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 2.0b.
Q: What HDCP version does it support?
A: It supports HDCP 2.2.
Q: What video bandwidth does it support?
A: It supports 18Gbps 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 HDMI over fiber optic cable, not CAT cable.
Q: Is this AV over IP?
A: No. It is a point-to-point HDMI 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 HDMI loop out?
A: No HDMI 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 HDMI audio pass-through.
Q: What audio formats are supported?
A: It supports LPCM, Dolby Digital / Plus / EX, Dolby TrueHD, Dolby Atmos, DTS, DTS-EX, DTS-96/24, DTS High Res, 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 HDMI 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-FOHD10-K need external power?
A: Yes. Both the Transmitter and Receiver require the included DC 5V/1A power adapters.
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