1. Introduction
The TP-Link Deco AX3000 WiFi 6 Mesh System (Deco X55) provides seamless whole-home Wi-Fi coverage, eliminating dead zones and buffering. This system replaces traditional wireless routers and extenders, offering high-performance Wi-Fi 6 with advanced features like AI-Driven Mesh and HomeShield security.
This manual provides detailed instructions for setting up, operating, maintaining, and troubleshooting your Deco X55 mesh system.
Package Contents
- 3 x Deco X55 units
- 1 x RJ45 Ethernet cable
- 3 x Power adapters
- 1 x Quick Installation Guide

Figure 1: TP-Link Deco X55 Mesh System (3-pack)
2. Setup
Setting up your Deco X55 system is straightforward using the Deco app. Follow these steps for a quick and easy installation.
2.1 Before You Begin
- Ensure your modem is working correctly and connected to the internet.
- Download the TP-Link Deco app from the App Store (iOS) or Google Play Store (Android).
2.2 Initial Setup (Main Deco Unit)
- Power Off Modem: Disconnect your existing router and power off your modem.
- Connect Main Deco: Connect one Deco X55 unit to your modem using the provided Ethernet cable. Plug the Ethernet cable into any of the Gigabit ports on the Deco unit.
- Power On: Power on your modem, then power on the Deco unit. Wait for the Deco unit's LED to pulse blue.
- Launch Deco App: Open the Deco app on your smartphone or tablet. Log in or sign up for a TP-Link ID.
- Follow In-App Instructions: The app will guide you through creating your Deco network, including setting up a Wi-Fi name and password.

Figure 2: Quick Setup with the Deco App
2.3 Adding More Deco Units
- Place Deco Units: Place additional Deco units in desired locations to expand Wi-Fi coverage. Ensure they are within range of another Deco unit or the main Deco.
- Power On: Plug in the additional Deco units. Their LEDs will pulse blue.
- Add in App: Open the Deco app, tap the "Add" icon (+) on the top right, and follow the on-screen instructions to add the new Deco units to your network.

Figure 3: AI-Driven Mesh for Whole Home Coverage
Video 1: Official TP-Link Deco X55 Mesh System Setup Guide. This video demonstrates the step-by-step process of setting up your Deco X55 mesh Wi-Fi system, from unboxing to connecting your first unit and expanding the network.
3. Operating Your Deco System
Once your Deco system is set up, you can manage and optimize your network using the Deco app.
3.1 Deco App Overview
The Deco app provides comprehensive control over your mesh network. Key features include:
- Network Map: View connected devices and their status.
- Parental Controls: Manage internet access for family members.
- Quality of Service (QoS): Prioritize devices or activities for optimal performance.
- Guest Network: Create a separate Wi-Fi network for guests.
- Antivirus: Protect your network from malicious threats (HomeShield feature).
- Firmware Updates: Keep your Deco units up-to-date with the latest features and security enhancements.
3.2 Ethernet Backhaul
The Deco X55 units support Ethernet backhaul, allowing you to connect Deco units via Ethernet cables for a more stable and faster connection between them. This is ideal for homes with existing Ethernet wiring.

Figure 4: Gigabit Ethernet Ports for Wired Connections
3.3 AI-Driven Mesh Technology
The Deco X55 utilizes AI-Driven Mesh technology to intelligently learn your network environment and optimize Wi-Fi performance. This ensures seamless roaming as you move throughout your home, automatically connecting your devices to the strongest signal.
4. Maintenance
Regular maintenance helps ensure the optimal performance and longevity of your Deco mesh system.
- Keep Firmware Updated: Regularly check for and install firmware updates via the Deco app. Updates often include performance improvements, bug fixes, and security enhancements.
- Clean Units: Periodically wipe down the Deco units with a soft, dry cloth to remove dust. Do not use liquid cleaners or abrasive materials.
- Optimal Placement: Ensure Deco units are placed in open areas, away from large metal objects, thick walls, and other sources of interference (e.g., microwaves, cordless phones).
- Restart Periodically: Restarting your Deco units and modem occasionally can help clear temporary issues and refresh network performance. This can often be scheduled within the Deco app.
5. Troubleshooting
If you encounter issues with your Deco system, try the following troubleshooting steps:
5.1 No Internet Connection
- Check the LED status on your main Deco unit. If it's red, there's an issue with the internet connection.
- Ensure the Ethernet cable from your modem is securely connected to the Deco unit.
- Restart your modem and the main Deco unit. Wait a few minutes for them to reconnect.
- Verify your internet service provider (ISP) connection is active.
5.2 Weak Wi-Fi Signal or Dead Zones
- Relocate Deco units closer to each other or to the areas with weak signals.
- Ensure there are no major obstructions (e.g., thick concrete walls, large metal appliances) between Deco units.
- Check for interference from other electronic devices.
- Consider using Ethernet backhaul if possible, especially for units far apart.
5.3 Devices Not Connecting
- Ensure the Wi-Fi password entered is correct.
- Restart the device you are trying to connect.
- Check if the device is too far from any Deco unit.
- Temporarily disable any security features like Parental Controls or Access Control in the Deco app to see if they are blocking the device.
6. Specifications
| Feature | Description |
|---|---|
| Wi-Fi Standard | Wi-Fi 6 (802.11ax) |
| Wi-Fi Speeds | AX3000 (2402 Mbps on 5 GHz, 574 Mbps on 2.4 GHz) |
| Coverage | Up to 6500 sq. ft. (3-pack) |
| Connected Devices | Up to 150 devices |
| Ethernet Ports | 3 Gigabit ports per unit (WAN/LAN auto-sensing) |
| Mesh Technology | AI-Driven Mesh, Seamless Roaming |
| Security | TP-Link HomeShield (Basic Network Security, QoS, Parental Controls included; Pro features available with subscription) |
| Dimensions | 4.33 x 4.33 x 4.49 inches (per unit) |
| Weight | 3.3 pounds (total for 3-pack) |
7. Warranty and Support
TP-Link offers comprehensive support for its products.
7.1 Warranty Information
TP-Link provides a 2-year warranty for most home products. Please refer to the official TP-Link website or your purchase documentation for specific warranty terms and conditions applicable to your region.
7.2 Technical Support
For technical assistance, you can contact TP-Link's 24/7 technical support. Visit the official TP-Link support website for contact information, FAQs, and additional resources.
You can also find user manuals and guides on the TP-Link support page: TP-Link Deco X55 Support





