What Is the UHD-EX115-K?
The OREI UHD-EX115-K is an 18Gbps HDMI over HDBaseT extender kit with HDMI loop out, bi-directional IR, RS-232 pass-through, PoC, and receiver-side analog audio output. It extends HDMI video and audio from one source to one remote display over a single CAT5e / CAT6 cable.
The kit includes one Transmitter, one Receiver, one IR Blaster cable, one IR Receiver cable, mounting ears, 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 if needed, the remote display connects to HDMI OUT on the Receiver, and a CAT5e / CAT6 cable connects HDBT OUT on the Transmitter to HDBT IN on the Receiver.
The UHD-EX115-K supports HDMI 2.0b and HDCP 2.2 / 1.4, with a video bandwidth of 18Gbps. It supports video resolutions up to 4K@60Hz 4:4:4, HDR, HDR10+, Dolby Vision, HLG, HDMI loop output, analog stereo audio output on the Receiver, bi-directional IR, RS-232 pass-through, CEC pass-through, and PoC. It extends 4K signals up to 115ft / 40m and 1080p signals up to 230ft / 70m over a single CAT5e / CAT6 cable.
The UHD-EX115-K is useful for home theaters, classrooms, conference rooms, projector setups, AV racks, retail displays, digital signage, control rooms, and installations where HDMI needs to be extended with IR, RS-232, and audio support.
IMPORTANT — UHD-EX115-K Is an HDMI over HDBaseT Extender
The UHD-EX115-K extends one HDMI source to one HDMI display.
| Function | Support |
| 1 HDMI input | Supported |
| 1 HDMI loop output | Supported on Transmitter |
| 1 HDBaseT output | Supported |
| 1 Receiver | Included |
| One source to one remote display | Supported |
| Multiple displays | Not supported by itself |
| Matrix switching | Not supported |
| Extended desktop creation | Not supported |
This product does not split one HDMI source to multiple remote displays by itself. It extends one HDMI signal from the Transmitter to the Receiver.
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 |
| Video bandwidth | 18Gbps |
| HDR | Supported |
| HDR10+ | Supported |
| Dolby Vision | Supported |
| HLG | Supported |
| 3D formats | Supported |
| PC resolutions up to 1920 x 1200 | Supported |
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 — Maximum Distance Depends on Resolution
The extender delivers stable signal transmission when used within the correct distance range.
| Resolution | Maximum Distance |
| 4K2K signal | Up to 115ft / 40m |
| 1080p signal | Up to 230ft / 70m |
For best performance, use high-quality CAT5e / CAT6 cable.
Poor cable quality, damaged connectors, weak terminations, couplers, or long patching paths may reduce performance.
IMPORTANT — Use Direct CAT Cable Connection
Connect the Transmitter HDBT OUT directly to the Receiver HDBT IN using CAT5e / CAT6 cable.
Do not connect the HDBaseT cable through:
- Network switch
- Router
- Internet network
- LAN switch
- Standard Ethernet network
- Patch equipment that changes wiring format
This is an HDBaseT extender, not an AV-over-IP extender.
IMPORTANT — HDMI Loop Output Is on the Transmitter
The Transmitter includes HDMI OUT.
This HDMI output can connect a local display near the source.
| Port | Function |
| Transmitter HDMI IN | Connect HDMI source |
| Transmitter HDMI OUT | Connect local display |
| Receiver HDMI OUT | Connect remote display |
The local display and remote display show the same HDMI source.
IMPORTANT — Receiver Has Analog Audio Output
The Receiver includes a 3.5mm AUDIO OUT port for analog stereo audio output.
| Audio Port | Location | Function |
| AUDIO OUT | Receiver | 3.5mm analog stereo audio output |
The manual lists L/R audio format support as PCM 2.0.
Use this output to connect powered speakers, an amplifier, soundbar, or other analog audio device near the remote display.
If analog audio does not work, set the HDMI source audio output to PCM / Stereo.
IMPORTANT — Bi-Directional IR Is Supported
The UHD-EX115-K supports bi-directional IR.
This allows IR control in both directions:
| Direction | Use Case |
| Receiver side to Transmitter side | Control the HDMI source from the remote display location |
| Transmitter side to Receiver side | Control the remote display from the source location |
Typical source-control setup:
- Connect the IR Receiver cable to IR IN on the Receiver.
- Place the IR Receiver near the remote display.
- Connect the IR Blaster cable to IR OUT on the Transmitter.
- Place the IR Blaster near the HDMI source device’s IR window.
Typical display-control setup:
- Connect the IR Receiver cable to IR IN on the Transmitter.
- Connect the IR Blaster cable to IR OUT on the Receiver.
- Place the IR Blaster near the display’s IR window.
The supported IR frequency range is 20kHz to 60kHz.
IMPORTANT — RS-232 Pass-Through Is Supported
The UHD-EX115-K supports RS-232 pass-through between the Transmitter and Receiver.
| RS-232 Feature | Support |
| RS-232 port on Transmitter | Supported |
| RS-232 port on Receiver | Supported |
| Command transmission both directions | Supported |
| Phoenix connector | Included |
RS-232 can be used for:
- Projector control
- Display control
- Control processor integration
- Automation systems
- Serial command pass-through
IMPORTANT — PoC Is Supported
The UHD-EX115-K supports PoC, or Power over Cable.
Only one side needs the included 24V/1A power adapter.
| Power Setup | Support |
| Power Transmitter only | Supported |
| Power Receiver only | Supported |
| Power both units | Not required |
| PoC direction | Either side can power the other |
If one unit is powered with the 24V/1A adapter, the other unit can receive power through the CAT cable.
IMPORTANT — CEC Pass-Through Is Supported
The UHD-EX115-K supports CEC pass-through.
CEC behavior depends on the connected HDMI source, display, and their CEC settings.
If CEC does not work reliably, use IR control or RS-232 control where available.
Ports and Panel Layout
| Port / Indicator | Unit | Function |
| Power LED | Transmitter | Red LED indicates Transmitter is powered |
| SERVICE | Transmitter | Firmware update port |
| DC 24V | Transmitter | Connect 24V/1A power adapter if powering from Transmitter side |
| HDBT OUT | Transmitter | Connect CAT5e / CAT6 cable to Receiver HDBT IN |
| Connection Signal Indicator | Transmitter | Shows HDBaseT connection status |
| Data Signal Indicator | Transmitter | Shows HDMI / HDCP signal status |
| HDMI OUT | Transmitter | Connect local display |
| HDMI IN | Transmitter | Connect HDMI source |
| IR IN | Transmitter | Connect IR Receiver cable |
| IR OUT | Transmitter | Connect IR Blaster cable |
| RS-232 | Transmitter | 3-pin Phoenix connector for RS-232 pass-through |
| Power LED | Receiver | Red LED indicates Receiver is powered |
| SERVICE | Receiver | Firmware update port |
| DC 24V | Receiver | Connect 24V/1A power adapter if powering from Receiver side |
| HDBT IN | Receiver | Connect CAT5e / CAT6 cable from Transmitter |
| Connection Signal Indicator | Receiver | Shows HDBaseT connection status |
| Data Signal Indicator | Receiver | Shows HDMI / HDCP signal status |
| HDMI OUT | Receiver | Connect remote display |
| AUDIO OUT | Receiver | 3.5mm analog stereo audio output |
| IR IN | Receiver | Connect IR Receiver cable |
| IR OUT | Receiver | Connect IR Blaster cable |
| 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, cable box, streaming device, laptop, desktop PC, DVR, NVR, or media player. - Connect a local display to HDMI OUT on the Transmitter if needed.
- Connect HDBT OUT on the Transmitter to HDBT IN on the Receiver using CAT5e / CAT6 cable.
- Connect HDMI OUT on the Receiver to the remote TV, monitor, or projector.
- Connect the included 24V/1A locking power adapter to either the Transmitter or the Receiver.
- If using analog audio output, connect the Receiver AUDIO OUT to speakers, amplifier, soundbar, or other audio device.
- If using source control from the display side, connect the IR Receiver to Receiver IR IN and the IR Blaster to Transmitter IR OUT.
- If using display control from the source side, connect the IR Receiver to Transmitter IR IN and the IR Blaster to Receiver IR OUT.
- If using RS-232, connect the Phoenix RS-232 connectors on both ends as needed.
- Power on the HDMI source, displays, Transmitter, Receiver, and connected control/audio devices.
- Check the Power LED, Connection Signal Indicator, and Data Signal Indicator.
- Test video, audio, HDMI loop output, IR control, RS-232, and CEC if used.
CAT Cable Requirement — Critical
Use high-quality CAT5e / CAT6 cable.
| Resolution | Cable Type | Maximum Distance |
| 4K2K | CAT5e / CAT6 | Up to 115ft / 40m |
| 1080p | CAT5e / CAT6 | Up to 230ft / 70m |
Poor CAT cable may cause:
- No video
- Flickering
- Black screen
- Poor connection signal indicator status
- HDBaseT link failure
- Audio dropouts
- IR control issues
- RS-232 issues
- 4K signal not working
- Receiver not powering through PoC
Use direct cable runs whenever possible.
HDMI Cable Requirement — Critical
Use HDMI cables rated for 18Gbps when using 4K@60Hz 4:4:4.
Poor HDMI cables may cause:
- No picture
- Flickering
- Black screen
- HDR issues
- Dolby Vision issues
- Audio dropouts
- HDCP handshake issues
- No signal on HDMI loop output
- No signal on Receiver HDMI OUT
For troubleshooting, test the HDMI source directly with the display before using the extender.
Power Requirement — Critical
The UHD-EX115-K uses one DC 24V/1A locking power adapter.
| Unit | Power |
| Transmitter | DC 24V/1A, or powered through PoC |
| Receiver | DC 24V/1A, or powered through PoC |
| Power Detail | Value |
| Power adapter input | AC100–240V 50/60Hz |
| Power adapter output | DC 24V/1A |
| Maximum power consumption | 9.36W |
Only one side normally needs power because PoC powers the other unit through the CAT cable.
Understanding the Transmitter
The Transmitter is installed near the HDMI source.
It has:
- HDMI IN
- HDMI OUT loop output
- HDBT OUT
- IR IN and IR OUT
- RS-232
- SERVICE firmware port
- DC 24V input
- Power LED
- Connection Signal Indicator
- Data Signal Indicator
The Transmitter sends HDMI, IR, RS-232, and power through the CAT cable to the Receiver.
Understanding the Receiver
The Receiver is installed near the remote HDMI display.
It has:
- HDBT IN
- HDMI OUT
- AUDIO OUT
- IR IN and IR OUT
- RS-232
- SERVICE firmware port
- DC 24V input
- Power LED
- Connection Signal Indicator
- Data Signal Indicator
The Receiver converts the HDBaseT signal back to HDMI and provides analog audio output at the display side.
Understanding HDMI Loop Output
The HDMI OUT port on the Transmitter lets you connect a local display near the HDMI source.
This is useful for:
- AV racks
- Control desks
- Source rooms
- Classrooms
- Conference rooms
- Projector setups
- Installation testing
The local display and the remote display show the same HDMI source.
Understanding Receiver Audio Output
The Receiver AUDIO OUT port provides analog stereo audio output.
Use it when audio is needed near the remote display.
For best compatibility, set the HDMI source audio to PCM / Stereo when using the 3.5mm analog output.
Understanding Bi-Directional IR
Bi-directional IR lets remote control signals travel both directions through the extender system.
Use the IR Receiver cable where the remote control will be pointed.
Use the IR Blaster cable near the device being controlled.
Do not swap the IR Receiver and IR Blaster cables because they have different pin assignments.
Understanding RS-232 Pass-Through
RS-232 pass-through sends serial commands between the Transmitter and Receiver.
Common uses include:
- Projector control
- Display control
- Source control
- Control processor integration
- Automation systems
- Professional AV installations
The RS-232 command can pass from Transmitter to Receiver or from Receiver to Transmitter.
Understanding Signal Indicators
| Indicator | Status | Meaning |
| Connection Signal Indicator On | Transmitter and Receiver are in good connection status | |
| Connection Signal Indicator Flashing | Transmitter and Receiver are in poor connection status | |
| Connection Signal Indicator Dark | Transmitter and Receiver are not connected | |
| Data Signal Indicator On | HDMI signal with HDCP | |
| Data Signal Indicator Flashing | HDMI signal without HDCP | |
| Data Signal Indicator Dark | No HDMI signal |
Use these indicators first when troubleshooting.
Supported Video and Audio
The UHD-EX115-K supports video formats including:
| Supported Video |
| 4K2K 50/60Hz 4:4:4 |
| 4K2K 50/60Hz 4:2:2 |
| 4K2K 50/60Hz 4:2:0 |
| 4K2K 30Hz 4:4:4 |
| 1080p |
| 1080i |
| 720p |
| 720i |
| 480p |
| 480i |
| All HDMI 3D TV formats |
| PC resolutions including 1920 x 1200 |
| HDR |
| HDR10+ |
| Dolby Vision |
| HLG |
Supported HDMI audio formats include:
| Supported 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 |
Supported analog audio output:
| Audio Output | Supported Format |
| Receiver AUDIO OUT | PCM 2.0 |
Supported Technical Specifications
| Specification | Support |
| Product Type | 18Gbps HDMI over HDBaseT extender |
| HDMI Version | HDMI 2.0b |
| HDCP Version | HDCP 2.2 / 1.4 |
| DVI Compliance | DVI 1.0 |
| Video Bandwidth | 594MHz / 18Gbps |
| Maximum Resolution | 4K2K@50/60Hz 4:4:4 |
| HDR | HDR, HDR10+, Dolby Vision, HLG |
| HDMI Loop Output | Supported on Transmitter |
| Receiver Audio Output | 3.5mm analog stereo |
| Analog Audio Format | PCM 2.0 |
| IR | Bi-directional IR |
| IR Frequency | 20kHz–60kHz |
| RS-232 | Bi-directional pass-through |
| CEC | Pass-through |
| PoC | Supported |
| CAT Cable | CAT5e / CAT6 |
| 4K Distance | Up to 115ft / 40m |
| 1080p Distance | Up to 230ft / 70m |
| 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 | DC 24V/1A locking power adapter |
| Power Consumption | 9.36W max |
| Housing | Metal enclosure |
| Color | Black |
| Dimensions | 140mm x 65mm x 18mm |
| Weight | Transmitter 160g; Receiver 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, ±4kV contact |
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.
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
- HDTVs
- Commercial displays
- Conference room displays
- Classroom displays
- Digital signage displays
- Control room displays
- Local display near the source
- Remote display near the Receiver
For 4K@60Hz, the display must support 4K@60Hz input.
What Audio Devices Is the UHD-EX115-K Compatible With?
The Receiver AUDIO OUT port can connect to:
- Powered speakers
- Amplifiers
- Soundbars
- Headphones
- Audio processors
- Conference room audio systems
- Classroom audio systems
Use PCM / Stereo output from the HDMI source for best compatibility with analog audio output.
Frequently Asked Questions
Q: What is the OREI UHD-EX115-K used for?
A: It is used to extend HDMI video/audio, IR, RS-232, and power over a single CAT5e / CAT6 cable using HDBaseT technology.
Q: Does the UHD-EX115-K support 4K@60Hz?
A: Yes. It supports 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: Does it support HDR?
A: Yes. It supports HDR, HDR10+, Dolby Vision, and HLG.
Q: How far can it extend 4K?
A: It extends 4K2K signals up to 115ft / 40m over CAT5e / CAT6 cable.
Q: How far can it extend 1080p?
A: It extends 1080p signals up to 230ft / 70m over CAT5e / CAT6 cable.
Q: What CAT cable should I use?
A: Use high-quality CAT5e or CAT6 cable.
Q: Can I connect it through a network switch?
A: No. Connect HDBT OUT on the Transmitter directly to HDBT IN on the Receiver.
Q: Is this AV over IP?
A: No. It is an HDBaseT extender.
Q: Does the Transmitter have HDMI loop output?
A: Yes. The Transmitter has HDMI OUT for a local display.
Q: What is HDMI loop output used for?
A: It lets you connect a local display near the HDMI source while also extending the same signal to the remote display.
Q: Does the Receiver have audio output?
A: Yes. The Receiver has a 3.5mm AUDIO OUT port.
Q: What audio format is supported by the analog audio output?
A: The L/R audio format is PCM 2.0.
Q: What HDMI audio formats are supported?
A: It supports LPCM up to 7.1, 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 this manual for this model.
Q: Does it support DTS:X?
A: Yes. DTS:X is listed as supported.
Q: Does it support IR control?
A: Yes. It supports bi-directional IR.
Q: What IR frequency is supported?
A: It supports wideband IR from 20kHz to 60kHz.
Q: Which IR cable goes where for source control?
A: Connect the IR Receiver to Receiver IR IN and the IR Blaster to Transmitter IR OUT.
Q: Which IR cable goes where for display control?
A: Connect the IR Receiver to Transmitter IR IN and the IR Blaster to Receiver IR OUT.
Q: Does it support RS-232?
A: Yes. It supports RS-232 pass-through.
Q: Does it support CEC?
A: Yes. CEC pass-through is supported.
Q: Does it support PoC?
A: Yes. It supports Power over Cable.
Q: Do both units need power adapters?
A: No. Only one unit needs the included 24V/1A locking power adapter because PoC powers the other unit through the CAT cable.
Q: Can the power adapter connect to either Transmitter or Receiver?
A: Yes. Either unit can be powered, and the other unit can receive power through PoC.
Q: What power adapter is included?
A: The package includes one 24V/1A locking power adapter.
Q: What should I do if there is no video?
A: Check power, HDMI source, HDMI cables, CAT cable, display input, and the Connection Signal and Data Signal indicators.
Q: What should I do if the Connection Signal Indicator is flashing?
A: The Transmitter and Receiver are in poor connection status. Check CAT cable quality, terminations, cable length, and direct connection.
Q: What should I do if the Connection Signal Indicator is dark?
A: The Transmitter and Receiver are not connected. Check the CAT cable and confirm HDBT OUT is connected to HDBT IN.
Q: What should I do if the Data Signal Indicator is dark?
A: No HDMI signal is detected. Check the HDMI source, HDMI cable, and source output setting.
Q: What should I do if the Data Signal Indicator is flashing?
A: HDMI signal is detected without HDCP. Check source, display, and HDCP compatibility.
Q: What should I do if 4K@60Hz does not work?
A: Use HDMI cables rated for 18Gbps, keep the CAT run within 115ft / 40m for 4K, confirm the source and display support 4K@60Hz, and test with a lower resolution first.
Q: What should I do if analog audio output does not work?
A: Set the HDMI source audio output to PCM / Stereo and confirm the audio cable and speaker/amplifier input are working.
Q: What should I do if IR control does not work?
A: Confirm the IR Receiver and IR Blaster are connected in the correct direction and that the IR Blaster is placed near the controlled device’s IR sensor.
Q: What should I do if RS-232 does not work?
A: Check Phoenix connector wiring, serial control settings, and the connected control devices on both ends.
Q: Does the UHD-EX115-K need external power?
A: Yes. Connect the included DC 24V/1A locking power adapter to either the Transmitter or Receiver. The other unit can be powered through PoC.
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