User Manual for Digitus USB 2.0 CAT Extender DA-73120
Quick installation guide and user manual for the Digitus USB 2.0 CAT Extender (DA-73120). Includes connection diagrams, technical specifications, and troubleshooting tips for extending USB signals up to 150m.
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The Digitus USB 2.0 CAT Extender (DA-73120) allows you to transmit USB signals over distances of up to 150 meters using a CAT 6 (or higher) network cable. It is designed for use in offices, conference rooms, and industrial environments. The system consists of a transmitter unit (TX) and a receiver unit (RX), supporting transfer rates of up to 480 Mbps and providing four USB-A ports on the receiver side.
Important Safety Instructions
- Ensure all apparatus is properly grounded to prevent electric shock.
- Place the device in a well-ventilated area and do not block ventilation openings.
- Do not expose the device to rain or place it near water.
- Do not place the device on uneven or unstable surfaces.
- Do not insert metallic objects into the device.
- If using a third-party power supply, ensure it meets the product requirements (DC 5V/1A).
Package Content
- 1x Transmitter
- 1x Receiver
- 1x Quick Installation Guide
- 1x USB-A 2.0 Cable (1.2m)
- 1x Power supply unit (DC 5V/1A, 1.5m)
Technical Features
- Extended Range: Up to 150m via CAT 6 or higher cable.
- Cascading: Extension up to 300m (2x 150m) is possible using a network switch.
- Power: Transmitter is powered via the host PC; Receiver requires the included DC 5V/1A power supply.
- Protection: Integrated ESD protection (up to 8kV), overvoltage, and short-circuit protection.
- Plug & Play: No software or drivers required.
Ports and Interfaces
Transmitter (TX):

- RJ45 Port: Connects to the receiver via CAT 6 (or higher) network cable.
- USB-A Port: Connects to the host PC.
Receiver (RX):
- Reset Button: Press to restart the device.
- RJ45 Port: Connects to the transmitter via CAT 6 (or higher) network cable.
- Power Input: Connects to the DC 5V/1A power adapter.
- USB-A Ports: Four ports for connecting USB 2.0 devices (mouse, keyboard, printer, flash drive, etc.).
Connection Instructions

- Connect the transmitter to the host PC using the provided USB cable.
- Connect the transmitter and receiver using a CAT 6 (or higher) network cable.
- Connect your USB devices to the receiver's USB-A ports.
- Plug the power supply into the receiver to power on the system.
- Note: For distances over 150m, connect a network switch between the transmitter and receiver using two network cables.
Troubleshooting
If you experience issues, consider the following:
- No response after connecting a USB device: Verify that the network cable conforms to the IEEE-568B standard and is firmly connected. Try resetting the receiver using the reset button or power cycling the unit.
- Unstable connection with web camera: High-power USB devices may require additional power.
Specifications
- Maximum Range: 150m (via CAT 6 or higher).
- Transfer Rate: Up to 480 Mbps (USB 2.0).
- Operating Temperature: -20°C to 60°C.
- Housing Material: Metal.
- Dimensions (per unit): L 7.6 x W 6.0 x H 2.1 cm.
- Weight: TX 123g, RX 128g.
Practical help
Common problems
Check if the network cable conforms to IEEE-568B standard and is firmly connected. Reset the receiver by pressing the reset button or power cycling the unit.
High-power USB devices may require additional power supply.
Before use
- Ensure you have a CAT 6 (or higher) network cable (not included).
- Verify the host PC is available for connection.
- Ensure the power supply (DC 5V/1A) is available for the receiver.
- Check that the installation environment is well-ventilated.
Specs in practice
- Maximum range
- 150m using CAT 6 or higher cable.
- Transfer rate
- Up to 480 Mbps (USB 2.0 standard).
- Power consumption
- TX <= 2W, RX <= 2W.
Images and diagrams
- Transmitter: RJ45 port for network cable, USB-A port for host PC.
- Receiver: Reset button, RJ45 port, Power input, 4x USB-A ports for peripherals.
Model compatibility
- Requires CAT 6 or higher network cable.
- Cascading up to 300m possible using a network switch.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.