What Is the UHD-EX115-K?
The OREI UHD-EX115-K is an 18Gbps HDMI over HDBaseT extender with bi-directional IR, RS-232 pass-through, HDMI loop out, and audio de-embedding. It extends one HDMI source to one remote HDMI display over a single CAT5e / CAT6 cable.
The kit includes one Transmitter, one Receiver, one IR Blaster cable, one IR Receiver cable, mounting ears, two 3-pin Phoenix connectors, one 24V/1A locking power adapter, and a user manual. The HDMI source connects to HDMI IN on the Transmitter, the local display connects to HDMI OUT on the Transmitter, and the remote display connects to HDMI OUT on the Receiver. A CAT5e / CAT6 cable connects HDBT OUT on the Transmitter to HDBT IN on the Receiver.
The UHD-EX115-K supports HDMI 2.0b, HDCP 2.2 / 1.4, and DVI 1.0, with a video bandwidth of 18Gbps. It supports video resolutions up to 4K@60Hz 4:4:4, HDR, HDR10+, Dolby Vision, HLG, HDMI audio pass-through, 3.5mm stereo audio output on the Receiver, bi-directional IR, RS-232 pass-through, CEC pass-through, HDMI loop out, and Power over Cable.
The UHD-EX115-K is useful for home theaters, conference rooms, classrooms, control rooms, AV racks, digital signage, commercial AV installations, projector setups, source-side monitoring, and installations where HDMI, IR, RS-232, and audio need to be extended over one CAT cable.
IMPORTANT — UHD-EX115-K Is a Point-to-Point HDMI over HDBaseT Extender
The UHD-EX115-K extends one HDMI source to one remote HDMI display.
| Function | Support |
| 1 HDMI input | Supported |
| 1 remote HDMI output | Supported |
| HDMI loop out at Transmitter | Supported |
| HDBaseT extension | Supported |
| Bi-directional IR | Supported |
| RS-232 pass-through | Supported |
| Receiver audio output | Supported |
| Multiple remote displays | Not supported by itself |
| Matrix switching | Not supported |
This product is designed for point-to-point HDMI extension over HDBaseT. It is not a splitter or matrix.
IMPORTANT — Supports 4K@60Hz 4:4:4
The UHD-EX115-K supports video resolutions up to 4K@60Hz 4:4:4.
| Feature | Support |
| 4K@60Hz 4:4:4 | Supported |
| HDMI 2.0b | Supported |
| HDCP 2.2 / 1.4 | Supported |
| DVI 1.0 | Supported |
| Video bandwidth | 18Gbps |
| HDR | Supported |
| HDR10+ | Supported |
| Dolby Vision | Supported |
| HLG | Supported |
| 3D formats | Supported |
| PC resolutions | Up to 1920 x 1200 listed |
To get 4K@60Hz 4:4:4, the HDMI source, display, HDMI cables, CAT cable, and source output settings must all support the required signal.
IMPORTANT — Extension Distance Depends on Resolution
The UHD-EX115-K supports different extension distances depending on the video resolution.
| Resolution | Maximum Distance |
| 4K@60Hz / 4K signal | Up to 115ft / 40m |
| 1080p signal | Up to 230ft / 70m |
For best performance, use high-quality CAT5e / CAT6 cable.
Poor CAT cable, weak terminations, damaged connectors, couplers, wall plates, patch panels, or low-quality cable may cause no video, flickering, signal loss, poor HDBaseT link, or unstable 4K performance.
IMPORTANT — Use Direct CAT Cable Connection
Connect HDBT OUT on the Transmitter directly to HDBT IN on the Receiver using CAT5e / CAT6 cable.
Do not connect the CAT cable through:
- Network switch
- Router
- Internet network
- LAN switch
- Standard Ethernet network
This is a direct HDBaseT extender over CAT cable. It is not an AV-over-IP system.
IMPORTANT — Power over Cable Is Supported
The UHD-EX115-K supports Power over Cable.
| Power Setup | Support |
| Power from Transmitter side | Supported |
| Power from Receiver side | Supported |
| Included power adapter | DC 24V/1A locking power adapter |
| Separate power on both units normally required | No |
Either the Transmitter or Receiver can be powered by the included 24V/1A power adapter. The other unit receives power through the CAT cable.
If the unit does not power on, check the power adapter, locking DC connection, CAT cable, HDBT OUT / HDBT IN ports, and cable termination.
IMPORTANT — HDMI Loop Out Is Supported
The Transmitter includes HDMI OUT loop output.
| Unit | HDMI Port | Function |
| Transmitter | HDMI IN | Connect HDMI source device |
| Transmitter | HDMI OUT | Connect local display |
| Receiver | HDMI OUT | Connect remote display |
The HDMI loop out is useful when a local display is needed near the HDMI source, such as in an AV rack, control room, equipment room, classroom, or source-side display location.
IMPORTANT — Receiver Audio Output Is Supported
The Receiver includes a 3.5mm stereo AUDIO OUT port.
| Audio Port | Unit | Function |
| AUDIO OUT | Receiver | Connect analog stereo audio device |
The Receiver can de-embed HDMI audio to analog stereo output.
| Audio Output Type | Supported Format |
| Receiver L/R audio output | PCM 2.0 |
The connected HDMI source and audio device must support the selected audio format.
IMPORTANT — Bi-Directional IR Control Is Supported
The UHD-EX115-K supports bi-directional IR pass-through.
| IR Direction | IR Cable Setup |
| Control source from remote display side | IR Receiver connects to Receiver IR IN; IR Blaster connects to Transmitter IR OUT |
| Control display from source side | IR Receiver connects to Transmitter IR IN; IR Blaster connects to Receiver IR OUT |
This allows source-side and display-side IR control depending on how the IR cables are connected.
The manual lists wideband IR support from 20KHz to 60KHz.
IMPORTANT — RS-232 Pass-Through Is Supported
The UHD-EX115-K supports RS-232 pass-through using 3-pin Phoenix connectors.
| RS-232 Feature | Support |
| Transmitter RS-232 | Supported |
| Receiver RS-232 | Supported |
| Pass-through from TX to RX | Supported |
| Pass-through from RX to TX | Supported |
RS-232 can be used with a compatible control system or serial device.
IMPORTANT — CEC Pass-Through Is Supported
The UHD-EX115-K supports CEC pass-through.
| Control Feature | Support |
| CEC pass-through | Supported |
| IR pass-through | Supported |
| RS-232 pass-through | Supported |
CEC behavior can depend on the HDMI source, display, HDMI cable, and device settings.
Ports and Panel Layout
| Port / Button / Indicator | Unit | Function |
| Power LED | Transmitter | Red LED indicates the Transmitter is powered on |
| SERVICE | Transmitter | Firmware update port |
| DC 24V | Transmitter | Connect included DC 24V/1A locking power adapter |
| HDBT OUT | Transmitter | Connect CAT5e / CAT6 cable to Receiver HDBT IN |
| Connection Signal Indicator | Transmitter | Shows HDBaseT link status |
| Data Signal Indicator | Transmitter | Shows HDMI / HDCP signal status |
| HDMI OUT | Transmitter | HDMI loop output for local display |
| HDMI IN | Transmitter | HDMI source input |
| IR IN | Transmitter | IR input port for receiving IR remote signal |
| IR OUT | Transmitter | IR output port for controlling source device from Receiver side |
| RS-232 | Transmitter | 3-pin Phoenix connector for RS-232 pass-through |
| Power LED | Receiver | Red LED indicates the Receiver is powered on |
| SERVICE | Receiver | Firmware update port |
| DC 24V | Receiver | Connect included power adapter if powering from Receiver side |
| HDBT IN | Receiver | Connect CAT5e / CAT6 cable from Transmitter HDBT OUT |
| Connection Signal Indicator | Receiver | Shows HDBaseT link status |
| Data Signal Indicator | Receiver | Shows HDMI / HDCP signal status |
| HDMI OUT | Receiver | Connect remote HDMI display |
| AUDIO OUT | Receiver | 3.5mm stereo analog audio output |
| IR IN | Receiver | IR input port for receiving IR remote signal |
| IR OUT | Receiver | IR output port for controlling display device from Transmitter side |
| RS-232 | Receiver | 3-pin Phoenix connector for RS-232 pass-through |
Step-by-Step Setup
- Connect the HDMI source device to HDMI IN on the Transmitter.
Examples include a Blu-ray player, DVD player, cable box, streaming device, media player, laptop, desktop PC, DVR, NVR, HDMI switch output, or HDMI matrix output.
- Connect a local display to HDMI OUT on the Transmitter if a source-side display is needed.
- Connect CAT5e / CAT6 cable from HDBT OUT on the Transmitter to HDBT IN on the Receiver.
- Connect HDMI OUT on the Receiver to a TV, monitor, projector, or display.
- Connect the included DC 24V/1A locking power adapter to either the Transmitter or Receiver.
- If using Receiver-side analog audio, connect speakers, amplifier, soundbar, or an audio device to AUDIO OUT on the Receiver.
- If using IR control from the display side to the source side, connect the IR Receiver to Receiver IR IN.
- Connect the IR Blaster to Transmitter IR OUT and place it near the HDMI source device’s IR sensor.
- If using IR control from the source side to the display side, connect the IR Receiver to Transmitter IR IN.
- Connect the IR Blaster to Receiver IR OUT and place it near the display’s IR sensor.
- If using RS-232, connect the RS-232 Phoenix connector wiring between the extender and control system.
- Power on the HDMI source, displays, extender, and connected equipment.
- Check that the power LEDs are on.
- Check the connection signal indicators.
- Check the data signal indicators.
- Test video, audio, HDMI loop out, IR control, RS-232 pass-through, and Receiver audio output.
CAT Cable Requirement — Critical
Use high-quality CAT5e / CAT6 cable.
| Requirement | Specification |
| Cable type | CAT5e / CAT6 |
| 4K distance | Up to 115ft / 40m |
| 1080p distance | Up to 230ft / 70m |
| Connection | Direct Transmitter-to-Receiver connection |
Poor CAT cable may cause:
- No video
- Flickering
- Black screen
- HDBaseT link issues
- Connection signal indicator flashing
- Receiver not powering on
- RS-232 pass-through issues
- IR control failure
- Audio dropouts
- Unstable 4K@60Hz performance
Use direct, properly terminated CAT cable whenever possible.
HDMI Cable Requirement — Critical
Use high-quality HDMI cables, especially for 4K@60Hz 4:4:4.
Poor HDMI cables may cause:
- No picture
- Flickering
- Black screen
- HDR issues
- Dolby Vision issues
- HDMI source not detected
- HDMI loop out not working
- 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.
IR Cable Requirement — Critical
Use the included IR Blaster and IR Receiver cables for IR pass-through.
| IR Cable | Connects To | Purpose |
| IR Receiver cable | IR IN port | Receives IR remote commands |
| IR Blaster cable | IR OUT port | Sends IR command to the device being controlled |
For controlling a local source from the remote display side:
- Connect the IR Receiver cable to Receiver IR IN
- Connect the IR Blaster cable to Transmitter IR OUT
- Place the IR Blaster near the source device IR sensor
- Use the source device remote at the Receiver side
For controlling the remote display from the source side:
- Connect the IR Receiver cable to Transmitter IR IN
- Connect the IR Blaster cable to Receiver IR OUT
- Place the IR Blaster near the display IR sensor
- Use the display remote at the Transmitter side
RS-232 Requirement — Critical
Use the 3-pin Phoenix connector for RS-232 pass-through.
| RS-232 Connection | Function |
| Transmitter RS-232 | Send / receive RS-232 commands |
| Receiver RS-232 | Send / receive RS-232 commands |
| Pass-through direction | Transmitter to Receiver or Receiver to Transmitter |
If RS-232 does not work, check the Phoenix wiring, control system settings, cable connection, and that both extender units are linked properly.
Power Requirement — Critical
The UHD-EX115-K uses one DC 24V/1A locking power adapter and supports PoC.
| Unit | Power |
| Transmitter | DC 24V/1A input, supports PoC |
| Receiver | DC 24V/1A input, supports PoC |
| Power Detail | Value |
| Included power adapter | DC 24V/1A locking connector |
| Power adapter input | AC 100–240V, 50/60Hz |
| Power consumption | 9.36W max |
| Power over Cable | Supported |
Only one power adapter is normally required. It can be connected to either the Transmitter or Receiver.
Understanding the Transmitter
The Transmitter is installed near the HDMI source.
It has:
- HDMI IN
- HDMI OUT loop output
- HDBT OUT
- IR IN
- IR OUT
- RS-232
- SERVICE port
- DC 24V input
- Power LED
- Connection signal indicator
- Data signal indicator
The Transmitter receives the HDMI signal from the source, provides HDMI loop out for a local display, sends the signal through HDBaseT over CAT cable, and supports IR and RS-232 pass-through.
Understanding the Receiver
The Receiver is installed near the remote display.
It has:
- HDBT IN
- HDMI OUT
- AUDIO OUT
- IR IN
- IR OUT
- RS-232
- SERVICE port
- DC 24V input
- Power LED
- Connection signal indicator
- Data signal indicator
The Receiver receives the HDBaseT signal from the Transmitter, outputs HDMI to the display, provides analog stereo audio output, and supports IR and RS-232 pass-through.
Understanding the Application Example
The application diagram shows an HDMI source connected to the Transmitter HDMI IN. A local display connects to the Transmitter HDMI OUT loop port. CAT6 / CAT7 cable connects the Transmitter and Receiver. The Receiver connects to a remote HDMI display. The diagram also shows IR IN / IR OUT for two-way IR control, RS-232 pass-through, and 3.5mm audio output at the Receiver side.
This shows the main use case: extending HDMI over one CAT cable while keeping a local display near the source and supporting remote control, RS-232, and stereo audio output.
Understanding LED Indicators
| Indicator | Status | Meaning |
| Power LED | Red on | Transmitter or Receiver is powered on |
| Connection Signal Indicator | Solid | Transmitter and Receiver are in good connection status |
| Connection Signal Indicator | Flashing | Transmitter and Receiver are in poor connection status |
| Connection Signal Indicator | Off | Transmitter and Receiver are not connected |
| Data Signal Indicator | Solid | HDMI signal with HDCP |
| Data Signal Indicator | Flashing | HDMI signal without HDCP |
| Data Signal Indicator | Off | No HDMI signal |
Use these LEDs first when troubleshooting power, link, HDMI signal, or HDCP issues.
Supported Video and Audio
The UHD-EX115-K supports video formats including:
| Supported Video |
| 4K@60Hz 4:4:4 |
| 4K@60Hz 4:2:2 |
| 4K@60Hz 4:2:0 |
| 4K@30Hz 4:4:4 |
| 1080p |
| 1080i |
| 720p |
| 720i |
| 480p |
| 480i |
| All HDMI 3D TV formats |
| PC resolutions including 1920 x 1200 |
| RGB |
| YCbCr 4:4:4 |
| YCbCr 4:2:2 |
| YCbCr 4:2:0 |
| 8-bit color |
| 10-bit color |
| 12-bit color |
| HDR |
| HDR10+ |
| Dolby Vision |
| HLG |
Supported HDMI audio formats include:
| Supported HDMI Audio |
| LPCM 2.0 |
| LPCM 2.1 |
| LPCM 5.1 |
| LPCM 6.1 |
| LPCM 7.1 |
| Dolby Digital |
| Dolby TrueHD |
| Dolby Digital Plus |
| DTS-ES |
| DTS-HD Master |
| DTS-HD HRA |
| DTS:X |
Supported Receiver L/R audio format:
| Supported L/R Audio |
| PCM 2.0 |
Supported Technical Specifications
| Specification | Support |
| Product Type | 18Gbps HDMI over HDBaseT extender with bi-directional IR |
| HDMI Version | HDMI 2.0b |
| HDCP Version | HDCP 2.2 / 1.4 |
| DVI Version | DVI 1.0 compliant |
| Video Bandwidth | 594MHz / 18Gbps |
| Maximum Resolution | 4K@60Hz 4:4:4 |
| 4K Extension Distance | Up to 115ft / 40m over CAT5e / CAT6 |
| 1080p Extension Distance | Up to 230ft / 70m over CAT5e / CAT6 |
| HDR | HDR, HDR10+, Dolby Vision, HLG |
| Color Space | RGB / YCbCr 4:4:4, YCbCr 4:2:2, YCbCr 4:2:0 |
| Color Depth | 8/10/12-bit for 1080p60, 4K30, 4K60 YCbCr 4:2:2 / 4:2:0; 8-bit for 4K60 4:4:4 |
| HDMI Audio | LPCM 2.0 / 2.1 / 5.1 / 6.1 / 7.1, Dolby Digital, Dolby TrueHD, Dolby Digital Plus, DTS-ES, DTS-HD Master, DTS-HD HRA, DTS:X |
| L/R Audio | PCM 2.0 |
| HDMI Loop Out | Supported on Transmitter |
| Audio De-Embedding | 3.5mm analog stereo output on Receiver |
| IR Control | Bi-directional IR |
| IR Frequency | 20KHz–60KHz |
| RS-232 | Pass-through supported |
| CEC | Pass-through supported |
| PoC | Supported |
| Transmitter Input | HDMI IN |
| Transmitter Outputs | HDMI OUT, HDBT OUT |
| Transmitter Control | IR IN, IR OUT, RS-232, SERVICE |
| Receiver Input | HDBT IN |
| Receiver Outputs | HDMI OUT, AUDIO OUT |
| Receiver Control | IR IN, IR OUT, RS-232, SERVICE |
| Power Supply | Input: AC 100–240V 50/60Hz; Output: DC 24V/1A locking connector |
| Power Consumption | 9.36W max |
| Housing | Metal enclosure |
| Color | Black |
| Dimensions | 140mm x 65mm x 18mm |
| Transmitter Weight | 160g |
| Receiver Weight | 155g |
| Operating Temperature | 0°C to 40°C / 32°F to 104°F |
| Storage Temperature | -20°C to 60°C / -4°F to 140°F |
| Relative Humidity | 20–90% RH, non-condensing |
| ESD Protection | ±8kV air-gap discharge, ±4kV contact discharge |
What Source Devices Is the UHD-EX115-K Compatible With?
The UHD-EX115-K is compatible with HDMI source devices such as:
- Blu-ray players
- DVD players
- Cable boxes
- Satellite receivers
- Streaming devices
- Media players
- Desktop PCs
- Laptops with HDMI output
- 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 4:4:4.
What Displays Is the UHD-EX115-K Compatible With?
The UHD-EX115-K can connect to HDMI displays such as:
- 4K TVs
- 1080p TVs
- Monitors
- Projectors
- Commercial displays
- Classroom displays
- Conference room displays
- Control room displays
- Digital signage displays
- Remote display locations
For 4K@60Hz, the display must support 4K@60Hz input.
What Audio Devices Is the UHD-EX115-K Compatible With?
The Receiver 3.5mm AUDIO OUT port can connect to:
- Speakers
- Amplifiers
- Soundbars
- Headphones
- Audio devices with 3.5mm input
The Receiver analog audio output supports PCM 2.0.
Frequently Asked Questions
Q: What is the OREI UHD-EX115-K used for?
A: It is used to extend one HDMI source to one remote HDMI display over CAT5e / CAT6 cable while also supporting HDMI loop out, bi-directional IR, RS-232 pass-through, CEC pass-through, audio output, and Power over Cable.
Q: Does the UHD-EX115-K support 4K@60Hz?
A: Yes. It supports video resolutions up to 4K@60Hz 4:4:4.
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 and HDCP 1.4.
Q: What video bandwidth does it support?
A: It supports 18Gbps video bandwidth.
Q: How far can it extend 4K video?
A: It extends 4K video up to 115ft / 40m over CAT5e / CAT6 cable.
Q: How far can it extend 1080p video?
A: It extends 1080p video up to 230ft / 70m over CAT5e / CAT6 cable.
Q: What CAT cable should I use?
A: Use CAT5e or CAT6 cable.
Q: Can I connect it through a network switch?
A: No. It requires a direct CAT cable connection between the Transmitter and Receiver.
Q: Is this AV over IP?
A: No. It is a direct HDBaseT extender over CAT cable.
Q: Does it support Power over Cable?
A: Yes. It supports PoC, so either the Transmitter or Receiver can be powered, and the other unit receives power through the CAT cable.
Q: Do both units need separate power adapters?
A: No. Only one included 24V/1A power adapter is normally required.
Q: What power adapter does it use?
A: It uses a DC 24V/1A locking power adapter.
Q: Does the Transmitter have HDMI loop out?
A: Yes. The Transmitter has HDMI OUT for connecting a local display.
Q: What is HDMI loop out used for?
A: HDMI loop out allows a local display to be connected near the HDMI source while the same signal is extended to the Receiver.
Q: Does the Receiver have audio output?
A: Yes. The Receiver includes a 3.5mm AUDIO OUT port for analog stereo audio.
Q: What audio format does the Receiver audio output support?
A: The L/R audio output supports PCM 2.0.
Q: Does it support HDMI audio pass-through?
A: Yes. HDMI audio formats include LPCM, Dolby Digital, Dolby TrueHD, Dolby Digital Plus, DTS-ES, DTS-HD Master, DTS-HD HRA, and DTS:X.
Q: Does it support Dolby Atmos?
A: Dolby Atmos is not listed in the manual.
Q: Does it support Dolby Vision?
A: Yes. Dolby Vision is listed as supported.
Q: Does it support HDR?
A: Yes. HDR, HDR10+, Dolby Vision, and HLG are supported.
Q: Does it support IR control?
A: Yes. It supports bi-directional IR control.
Q: What IR frequency does it support?
A: It supports wideband IR from 20KHz to 60KHz.
Q: Can I control the source from the remote display side?
A: Yes. Connect the IR Receiver to Receiver IR IN and the IR Blaster to Transmitter IR OUT.
Q: Can I control the display from the source side?
A: Yes. Connect the IR Receiver to Transmitter IR IN and the IR Blaster to Receiver IR OUT.
Q: Does it support RS-232?
A: Yes. RS-232 pass-through is supported.
Q: Does it support CEC?
A: Yes. CEC pass-through is supported.
Q: Does it support audio extraction?
A: Yes. The Receiver provides 3.5mm analog stereo audio output.
Q: What does the connection signal indicator mean?
A: Solid means the Transmitter and Receiver are connected properly, flashing means poor connection, and off means they are not connected.
Q: What does the data signal indicator mean?
A: Solid means HDMI signal with HDCP, flashing means HDMI signal without HDCP, and off means no HDMI signal.
Q: What should I do if there is no video output?
A: Check the HDMI source, HDMI cables, CAT cable, power connection, display input, and LED indicators. Try lowering the source resolution and testing the HDMI source directly with the display.
Q: What should I do if 4K@60Hz does not work?
A: Use high-quality HDMI cables, use CAT5e / CAT6 cable within 115ft / 40m, confirm the source and display support 4K@60Hz, and test with a lower resolution.
Q: What should I do if IR control does not work?
A: Confirm the IR Receiver and IR Blaster are connected to the correct IR IN / IR OUT ports and placed near the correct remote or device IR window.
Q: What should I do if RS-232 does not work?
A: Check the Phoenix connector wiring, control system settings, and confirm the Transmitter and Receiver are linked properly.
Q: Does the UHD-EX115-K need external power?
A: Yes. Use the included DC 24V/1A locking power adapter. Because the unit supports PoC, the adapter can be connected to either the Transmitter or Receiver.
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