ASUS RT-AC66U B1 Dual-Band AC1750 Gigabit WiFi Router Instruction Manual

1. Introduction

This manual provides detailed instructions for setting up, operating, and maintaining your ASUS RT-AC66U B1 Dual-Band AC1750 Gigabit WiFi Router. The RT-AC66U B1 delivers 3x3 802.11ac WiFi with up to 1750Mbps throughput and extensive coverage. It features integrated USB ports for printer and USB storage sharing, with remote file access via ASUS AiCloud 2.0. Management is simplified through ASUSWRT and the ASUS Router App.

Figure 1: Front view of the ASUS RT-AC66U B1 Router.

2. Package Contents

Verify that all items are present in your product package:

• ASUS RT-AC66U B1 Dual-Band 3x3 802.11AC Gigabit Router
• Power adapter
• RJ-45 Ethernet cable
• Quick start guide
• Support CD (User manual and utility software)
• Warranty card

Figure 2: Included items in the ASUS RT-AC66U B1 Router package.

3. Product Features

The ASUS RT-AC66U B1 router offers a range of features designed to enhance your network experience:

• Dual-Band AC1750 WiFi: Provides high-speed wireless connectivity across both 2.4 GHz and 5 GHz bands for optimal performance.
• 4-Port Gigabit Ethernet: Ensures fast and reliable wired connections for your devices.
• ASUSWRT Web-Based Interface: Offers an intuitive and easy-to-use interface for router setup and management.
• ASUS Router App: Allows convenient monitoring and management of your network directly from your mobile device.
• Integrated USB 3.0 and 2.0 Ports: Enables sharing of printers and USB storage devices across your network.
• ASUS AiCloud 2.0 Support: Provides remote access to files stored on connected USB devices.
• AiMesh Compatibility: Can be integrated with other compatible ASUS routers to create a seamless whole-home mesh WiFi system, extending coverage and improving signal strength.

4. Setup Instructions

Follow these steps to set up your ASUS RT-AC66U B1 router:

1. Connect the Antennas: Attach the three external antennas to the connectors on the rear of the router. Ensure they are securely tightened.
2. Connect to the Internet:
   • Connect one end of the provided RJ-45 Ethernet cable to the WAN port (usually blue) on the router.
   • Connect the other end of the Ethernet cable to your modem's LAN port.
3. Connect Your Computer (Optional, for initial setup):
   • Connect another RJ-45 Ethernet cable from one of the router's LAN ports (yellow) to your computer's Ethernet port.
   • Alternatively, you can connect wirelessly using the default WiFi network name (SSID) and password found on the product label.
4. Power On:
   • Connect the power adapter to the router's DC-in port.
   • Plug the power adapter into a power outlet.
   • Press the Power button to turn on the router. The LED indicators on the front panel will light up as the router starts.
5. Access the Setup Wizard:
   • Open a web browser on your connected computer or mobile device.
   • Enter router.asus.com or 192.168.1.1 in the address bar.
   • Follow the on-screen instructions of the ASUSWRT setup wizard to configure your internet connection, WiFi network name (SSID), and password.
6. Using the ASUS Router App: Download the ASUS Router App from your device's app store. The app provides an alternative, user-friendly method for initial setup and ongoing network management.

Figure 3: Rear panel of the ASUS RT-AC66U B1 Router with port connections.

Figure 4: Labeled diagram of the ASUS RT-AC66U B1 Router's rear ports, including AC socket, power switch, USB, reset button, WAN, Gigabit LAN, and WPS button.

5. Operating Instructions

Once your router is set up, you can utilize its various functions:

• WiFi Connectivity: The router broadcasts two separate WiFi networks (2.4 GHz and 5 GHz). Connect your devices to the appropriate network for optimal speed and range. The 5 GHz band offers faster speeds for close-range devices, while the 2.4 GHz band provides better range for devices further away.
• USB Sharing: Plug a USB printer or storage device into the USB 2.0 or USB 3.0 ports on the router. You can then configure printer sharing or access files on the storage device across your network. ASUS AiCloud 2.0 allows you to access these files remotely from anywhere with an internet connection.
• ASUS Router App Management: Use the mobile app to monitor network traffic, manage connected devices, set up parental controls, and adjust various router settings without needing a computer.
• AiMesh System: If you have another compatible ASUS router, you can create an AiMesh system. This extends your WiFi coverage by using multiple ASUS routers to form a single, seamless network, eliminating dead zones. Refer to the ASUS website or the AiMesh section in the ASUSWRT interface for detailed setup instructions.

6. Maintenance

Regular maintenance helps ensure optimal performance and longevity of your router:

• Firmware Updates: Periodically check for and install the latest firmware updates via the ASUSWRT interface or the ASUS Router App. Firmware updates often include performance improvements, security patches, and new features.
• Regular Reboots: Rebooting your router every few weeks can help clear its memory and resolve minor network issues, improving stability.
• Physical Cleaning: Keep the router in a well-ventilated area and periodically clean dust from its vents to prevent overheating.

7. Troubleshooting

If you encounter issues with your router, try the following troubleshooting steps:

• No Internet Connection:
  • Check all cable connections (modem to router, router to computer).
  • Restart your modem and router.
  • Verify your internet service provider (ISP) connection status.
• Slow WiFi Speed:
  • Ensure your devices are connected to the appropriate WiFi band (5 GHz for faster speeds, 2.4 GHz for better range).
  • Reduce interference by moving the router away from other electronic devices.
  • Check for active bandwidth-heavy applications or devices.
• Cannot Access Router Settings:
  • Ensure your device is connected to the router's network.
  • Try accessing router.asus.com or 192.168.1.1 in a different web browser.
  • If you forgot your login credentials, you may need to perform a factory reset (refer to the Quick Start Guide for instructions).
• Intermittent Connection:
  • Update router firmware to the latest version.
  • Adjust antenna positions for better signal.
  • Consider using AiMesh to extend coverage if you have a large home.

8. Specifications

9. Warranty and Support

Your ASUS RT-AC66U B1 router comes with a warranty. Please refer to the included Warranty Card in your package for detailed information regarding warranty terms and conditions. For technical support, you can consult the Support CD for user manual and utility software, or visit the official ASUS support website.

For further assistance, please visit: ASUS Support Website