1. Introduction
The TP-Link TL-SG105S is an unmanaged 5-port Gigabit desktop switch designed to expand your wired network capacity. It provides a simple, cost-effective, high-performance, and seamless upgrade to a 1000Mbps network. This device is suitable for home and small office environments, offering reliable and fast network connections for multiple devices.
2. Product Overview
2.1 Package Contents
- TL-SG105S 5-Port Gigabit Desktop Switch
- Power Adapter
- Installation Guide
- Rubber Feet
2.2 Physical Appearance
The TL-SG105S features a sturdy metal casing and a compact design, making it suitable for desktop placement or wall-mounting.

Image: Front view of the TP-Link TL-SG105S 5-Port Gigabit Desktop Switch, showing five RJ45 ports labeled 1 through 5, a Link/Act indicator above each port, and a Power LED on the right side.

Image: Rear view of the TP-Link TL-SG105S 5-Port Gigabit Desktop Switch, displaying the power input port (5V = 0.6A) and a Kensington security slot.
2.3 LED Indicators
- Power LED: Indicates the power status of the switch. On when powered, off when not.
- Link/Act LEDs (per port): Indicates the connection status and activity for each port.
- Green (Solid): A device is connected and operating at 1000Mbps.
- Green (Flashing): Data is being transmitted or received at 1000Mbps.
- Yellow (Solid): A device is connected and operating at 10/100Mbps.
- Yellow (Flashing): Data is being transmitted or received at 10/100Mbps.
- Off: No device is connected to the port, or the connected device is powered off.
3. Setup
The TL-SG105S is a plug-and-play device, requiring no software configuration for basic operation.
3.1 Placement
The switch can be placed on a desktop or mounted on a wall. Ensure adequate ventilation around the device.

Image: Diagram illustrating the compact dimensions (100mm L x 98mm W x 25mm H) of the TL-SG105S switch and highlighting its high-quality metal casing, fanless design, and wall-mounting option.
3.2 Connection Steps
- Power On: Connect the provided power adapter to the switch's power input and then to a power outlet. The Power LED will illuminate.
- Connect Devices: Use standard Ethernet cables to connect your network devices (e.g., computers, printers, IPTV boxes, routers) to any of the 5 RJ45 ports on the switch. The corresponding Link/Act LED for each connected port will light up.

Image: A three-step diagram showing the plug-and-play setup: 1) Plug in the power adapter to the switch, 2) Connect various devices like IPTV, printer, computer, and internet router to the switch's ports, 3) The network is ready for use.
4. Operating Instructions
The TL-SG105S operates automatically once connected. It is an unmanaged switch, meaning it does not require user configuration for its core functions.
4.1 Auto-Negotiation
Each port on the switch automatically detects the link speed of a connected network device (10Mbps, 100Mbps, or 1000Mbps) and intelligently adjusts to ensure full compatibility and optimal performance.
4.2 Quality of Service (QoS)
The switch supports Port-based 802.1p/DSCP QoS, which helps prioritize network traffic. This feature ensures that time-sensitive data, such as video streaming or voice calls, receives preferential treatment to maintain high quality even during network congestion.

Image: An illustration demonstrating Quality of Service (QoS) where gaming traffic is prioritized over music and TV streaming, ensuring a smoother gaming experience.
4.3 IGMP Snooping
IGMP Snooping optimizes multicast traffic delivery, which is beneficial for applications like IPTV. It prevents multicast streams from flooding the entire network, improving efficiency and reducing unnecessary traffic.
5. Maintenance
5.1 General Care
- Keep the device in a cool, dry place, away from direct sunlight and heat sources.
- Avoid exposing the switch to water or excessive humidity.
- Clean the device with a soft, dry cloth. Do not use liquid or aerosol cleaners.
- Ensure proper ventilation by not blocking the vents on the sides of the switch.
5.2 Environmental Conditions
The operating temperature range for the TL-SG105S is 4°F to 130°F (-15°C to 55°C).
6. Troubleshooting
If you encounter issues with your TL-SG105S switch, refer to the following common troubleshooting tips:
- No Power: Ensure the power adapter is securely connected to both the switch and a working power outlet. Check if the Power LED is illuminated. If not, try a different outlet or power adapter.
- No Link/Activity on a Port:
- Verify that the Ethernet cable is securely connected to both the switch port and the network device.
- Ensure the connected network device is powered on and functioning correctly.
- Try using a different Ethernet cable.
- Connect the device to a different port on the switch.
- Check the status of the Link/Act LED for the specific port.
- Slow Network Speed:
- Ensure all connected devices and cables support Gigabit Ethernet (Cat5e or higher cables are recommended for Gigabit speeds).
- Check the color of the Link/Act LED. A yellow LED indicates a 10/100Mbps connection, while a green LED indicates a 1000Mbps connection.
- Minimize network congestion by utilizing the QoS feature if applicable to prioritize critical traffic.
If problems persist, please contact TP-Link technical support for further assistance.
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | TL-SG105S |
| Number of Ports | 5 |
| Data Transfer Rate | 10/100/1000 Mbps (Gigabit) |
| Interface Type | RJ45 |
| Case Material | Metal |
| Dimensions (L x W x H) | 3.94" x 3.86" x 0.98" (100 x 98 x 25 mm) |
| Item Weight | 7.7 ounces (0.22 Kilograms) |
| Operating Temperature | 4°F to 130°F (-15°C to 55°C) |
| Features | Plug & Play, Fanless, 802.1p/DSCP QoS, IGMP Snooping |
| UPC | 840460604062, 845973083519 |
8. Warranty and Support
8.1 Manufacturer Warranty
The TP-Link TL-SG105S 5-Port Gigabit Desktop Switch is backed by a 3-year manufacturer warranty. This warranty covers defects in materials and workmanship under normal use.

Image: Graphic indicating TP-Link's 3-year warranty coverage for their products.
8.2 Technical Support
For technical assistance, troubleshooting, or warranty claims, please visit the official TP-Link website or contact their customer support. Support resources typically include FAQs, driver downloads, and contact information for technical support specialists.







