What Is the HD-EX108?
The OREI HD-EX108 is a 1x8 HDMI extender splitter over CAT5e / CAT6 network cable. It takes one HDMI source and distributes the same HDMI signal to up to eight HDMI displays using compatible HDbitT receiver units.
The HDMI source connects to the HDMI input on the HD-EX108 Transmitter. The eight RJ45 outputs connect to Receiver units using CAT cable, and each Receiver connects to a TV, projector, or monitor through HDMI.
The HD-EX108 supports one HDMI input to eight RJ45 outputs, HDCP compatibility, HDbitT transport protocol, IR signal transmission, and transmission distance up to 120m / 400ft when using CAT6 cable. It supports video resolutions up to 1080p@50/60Hz and is designed for HD audiovisual display rooms, HDTV setups, set-top box systems, DVD setups, exhibition centers, and digital monitoring systems.
IMPORTANT — HD-EX108 Is a 1x8 HDMI Extender Splitter
The HD-EX108 distributes one HDMI source to up to eight displays.
| Function | Support |
| 1 HDMI input | Supported |
| 8 RJ45 outputs | Supported |
| Same image on all displays | Supported |
| Extended desktop across displays | Not supported |
| Independent source switching | Not supported |
This product duplicates the same HDMI source to multiple displays. It does not create separate video outputs or extended PC desktop screens.
IMPORTANT — Supports Full HD, Not 4K
The HD-EX108 supports video resolutions up to 1080p.
Supported resolutions include:
| Resolution | Support |
| 480i@60Hz | Supported |
| 480p@60Hz | Supported |
| 576i@50Hz | Supported |
| 576p@50Hz | Supported |
| 720p@50/60Hz | Supported |
| 1080i@50/60Hz | Supported |
| 1080p@50/60Hz | Supported |
It does not support:
- 4K
- 4K@60Hz
- 4K@120Hz
- 8K
For 4K distribution, use a 4K HDMI splitter extender model.
IMPORTANT — Maximum Distance Depends on CAT Cable Type
The HD-EX108 supports different transmission distances depending on cable type.
| Cable Type | Maximum Distance |
| CAT5 | Up to 80m |
| CAT5e | Up to 100m |
| CAT6 | Up to 120m / 400ft |
For best performance and longest distance, use high-quality CAT6 cable.
Poor cable quality, damaged connectors, bad terminations, or long patch paths can reduce performance.
IMPORTANT — Compatible Receiver Units Are Required
The HD-EX108 Transmitter provides eight RJ45 outputs.
Each display location needs a compatible HDMI extender Receiver unit.
Each Receiver connects to:
- CAT cable from the HD-EX108
- HDMI display
- IR Receiver cable if IR control is needed
- Power if required by the receiver model
IMPORTANT — IR Control Is Supported
The HD-EX108 supports IR signal transmission.
This allows the user near the display side to control the HDMI source device near the Transmitter.
Typical setup:
- Connect the IR Blaster extension cable to the IR Blaster extension port on the Transmitter
- Place the IR Blaster near the HDMI source device’s IR window
- Connect the IR Receiver cable at the Receiver side
- Point the source remote at the Receiver-side IR Receiver
The manual lists support for 20kHz to 60kHz IR devices.
IMPORTANT — Use Direct Network Cable Wiring
The manual recommends following the IEEE-568B wiring standard.
| Pin | Wire Color |
| 1 | Orange / White |
| 2 | Orange |
| 3 | Green / White |
| 4 | Blue |
| 5 | Blue / White |
| 6 | Green |
| 7 | Brown / White |
| 8 | Brown |
Use properly terminated UTP / STP CAT5e or CAT6 cable for reliable performance.
IMPORTANT — Use the Included Power Adapter
The HD-EX108 uses a DC 12V/3A power supply.
The manual notes to use a DC 12V power adapter and make sure any third-party adapter matches the specification.
Incorrect power may cause:
- No signal
- Unstable video
- Power issues
- Receiver connection issues
- Signal link LED not working
IMPORTANT — Do Not Plug or Unplug Network / IR Cables While in Use
The manual safety notes state not to plug or unplug network cables and IR cables while the device is in use.
Power off the system before changing CAT cable or IR cable connections.
Ports and Panel Layout
| Port / Button / Indicator | Function |
| HDMI Input | Connect HDMI source device |
| RJ45 Outputs | Connect CAT cable to compatible Receiver units |
| IR Blaster Extension Port | Connect IR Blaster cable for source control |
| Reset Button | Press if the display is not fluent or stable |
| Signal Link LEDs | Show connection status for the RJ45 outputs |
| Power Input | Connect DC 12V/3A power adapter |
Step-by-Step Setup
- Connect the HDMI source device to the HDMI input on the HD-EX108 Transmitter.
Examples include a DVD player, set-top box, media player, DVR, NVR, or computer. - Connect the IR Blaster extension cable to the IR Blaster extension port if IR control is needed.
- Place the IR Blaster near the source device’s IR sensor.
- Connect RJ45 outputs from the HD-EX108 Transmitter to compatible Receiver units using CAT5e / CAT6 cable.
- Connect each Receiver HDMI output to the HDMI input on a TV, projector, or monitor.
- Connect the DC 12V/3A power adapter to the Transmitter.
- Power on the HDMI source and displays.
- Check the power indicator and signal link LEDs.
- Test video on all displays and IR control if used.
CAT Cable Requirement — Critical
Use properly terminated CAT5e / CAT6 cable.
| Cable Type | Maximum Distance |
| CAT5 | Up to 80m |
| CAT5e | Up to 100m |
| CAT6 | Up to 120m / 400ft |
Poor CAT cable may cause:
- No video
- Waiting for connection
- Unstable display
- Signal dropouts
- IR control failure
- Shorter working distance
Use high-quality cable and make sure all cable ends are firmly connected.
HDMI Cable Requirement — Critical
Use good-quality HDMI cables for:
- Source to HD-EX108 HDMI input
- Receiver HDMI output to display
Poor HDMI cables may cause:
- No picture
- Flickering
- Black screen
- No sound
- HDCP handshake issues
- Wrong resolution
For troubleshooting, test the HDMI source directly with a display first.
Power Requirement — Critical
The HD-EX108 requires DC 12V/3A power.
| Power Requirement | Value |
| Power Supply | DC 12V/3A |
| Power Consumption | Less than 24W |
Use the included adapter or an adapter with matching specifications.
Understanding the Transmitter
The HD-EX108 Transmitter is installed near the HDMI source.
It has:
- HDMI input
- Eight RJ45 outputs
- IR Blaster extension port
- Reset button
- Signal link LEDs
- DC 12V power input
The Transmitter splits the HDMI signal and sends it over CAT cable to compatible Receiver units.
Understanding the Receiver Side
Each Receiver is installed near a display.
Each Receiver connects to:
- CAT cable from the HD-EX108
- HDMI display
- IR Receiver cable if IR control is needed
The Receiver converts the transmitted signal back to HDMI for the display.
Understanding IR Control
IR control lets the user control the HDMI source from the display location.
Typical setup:
| IR Cable | Connection | Placement |
| IR Blaster | Transmitter IR Blaster extension port | Near HDMI source device |
| IR Receiver | Receiver side | Near display where remote will point |
Use the remote control for the HDMI source device.
Troubleshooting
| Issue | What to Check |
| TV shows “waiting for connection” | Check Transmitter and Receiver power, and confirm all cables are firmly connected |
| TV shows “please check the TX input signal” | Check the HDMI source, HDMI cable, and source output |
| Display is not fluent or stable | Check cable length, make sure it is within range, then press the reset button and reconnect |
| No video on one display | Check that Receiver, HDMI cable, CAT cable, and display input |
| IR not working | Check IR Blaster and IR Receiver placement and connections |
Supported Technical Specifications
| Specification | Support |
| Product Type | 1x8 HDMI extender splitter over CAT cable |
| HDMI Input | 1 |
| RJ45 Outputs | 8 |
| HDMI Signal | Compatible with HDCP |
| Transport Protocol | HDbitT |
| Supported Resolution | Up to 1080p@50/60Hz |
| IR Signal | 20kHz–60kHz IR device support |
| CAT5 Distance | Up to 80m |
| CAT5e Distance | Up to 100m |
| CAT6 Distance | Up to 120m / 400ft |
| Connection Indicator LEDs | 8 LEDs |
| Power Supply | DC 12V/3A |
| Power Consumption | Less than 24W |
| Working Temperature | 0°C–60°C |
| Dimensions | 299mm x 110.7mm x 29.6mm |
| Weight | 430g |
| Color | Black |
What Source Devices Is the HD-EX108 Compatible With?
The HD-EX108 is compatible with HDMI source devices such as:
- DVD players
- Set-top boxes
- Media players
- DVRs
- NVRs
- Computers with HDMI output
- HD monitoring equipment
- HDMI source devices with supported 1080p output
The source must output a supported HDMI resolution.
What Displays Is the HD-EX108 Compatible With?
The HD-EX108 can connect to HDMI displays through compatible Receivers, including:
- HDTVs
- Monitors
- Projectors
- Digital signage displays
- Exhibition displays
- Monitoring displays
- Commercial displays
The display must support the selected HDMI output resolution.
Frequently Asked Questions
Q: What is the OREI HD-EX108 used for?
A: The HD-EX108 is used to split one HDMI source to up to eight HDMI displays over CAT5e / CAT6 cable using compatible Receiver units.
Q: Is the HD-EX108 a splitter or extender?
A: It is both. It splits one HDMI signal and extends it over CAT cable to multiple displays.
Q: How many HDMI inputs does it have?
A: It has one HDMI input.
Q: How many outputs does it have?
A: It has eight RJ45 outputs for compatible Receivers.
Q: Does it support 4K?
A: No. The manual lists support up to Full HD 1080p.
Q: Does it support 1080p?
A: Yes. It supports 1080p@50/60Hz.
Q: What is the maximum distance?
A: Up to 120m / 400ft over CAT6, 100m over CAT5e, or 80m over CAT5.
Q: What CAT cable should I use?
A: Use CAT6 for maximum distance, or CAT5e / CAT5 for shorter distances.
Q: Does it require Receiver units?
A: Yes. Each display requires a compatible HDMI extender Receiver.
Q: Does it support IR control?
A: Yes. It supports IR signal transmission for 20kHz to 60kHz IR devices.
Q: Which IR cable goes on the Transmitter?
A: The IR Blaster extension cable connects to the IR Blaster extension port on the Transmitter.
Q: What power adapter does it use?
A: It uses a DC 12V/3A power adapter.
Q: What should I do if the TV says “waiting for connection”?
A: Check that the Transmitter and Receiver are powered and that all cables are firmly connected.
Q: What should I do if the TV says “please check the TX input signal”?
A: Check whether the HDMI source is outputting signal. Try reconnecting the HDMI cable or connecting the source directly to the display.
Q: What should I do if the display is unstable?
A: Check whether the cable length is within the supported range, then press the reset button and reconnect.
Q: Can I disconnect network or IR cables while it is running?
A: No. The manual says not to plug or unplug network cables or IR cables while the device is in use.
Q: Does the HD-EX108 need external power?
A: Yes. Connect the DC 12V/3A power adapter to the Transmitter.
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