Introduction
The ARRIS SURFboard G20 DOCSIS 3.1 Wi-Fi 6 cable modem is an advanced, all-in-one device designed to deliver superior internet performance. It integrates a cable modem and a Wi-Fi router, utilizing the latest DOCSIS 3.1 and Wi-Fi 6 (802.11ax) technologies. This combination ensures faster download and upload speeds, enhanced network capacity, and broader Wi-Fi coverage throughout your home or office. The G20 is optimized for gig-speed cable internet plans and supports next-generation upload speeds up to 450 Mbps, making it ideal for demanding applications like video conferencing and large data uploads.

Figure 1: ARRIS SURFboard G20 Cable Modem Router Combo
This image shows the sleek, black, vertical design of the ARRIS SURFboard G20, featuring the ARRIS logo at the top and 'SURFboard' with a blue LED light at the bottom front.
What's in the Box
- WiFi 6 Cable Modem (ARRIS SURFboard G20)
- AC Power Adapter
- Quick Start Guide
Setup
Setting up your ARRIS SURFboard G20 is a straightforward process. Follow these steps to get your home network up and running quickly.

Figure 2: Easy Setup Steps for ARRIS G20
This image illustrates the three simple steps for setting up the ARRIS G20: 1. Connect Coaxial Cable, 2. Connect to Power Outlet, 3. Connect Ethernet Cable to PC or Wi-Fi Router. The back panel of the modem is shown with labeled ports.
- Connect Coaxial Cable: Connect one end of a coaxial cable (not included) to the cable wall outlet and the other end to the 'CABLE' port on the back of your G20 modem. Ensure the connection is finger-tight.
- Connect Power: Plug the AC power adapter into the 'POWER' port on the back of the G20, then plug the other end into an electrical outlet. The modem will begin its startup sequence, which may take several minutes. Wait for the indicator lights on the front to stabilize.
- Connect Ethernet Cable: For a wired connection, connect one end of an Ethernet cable (not included) to one of the 'LAN' ports on the back of the G20 and the other end to your computer or Wi-Fi router (if using a separate router).
- Activate Your Service: Download the SURFboard Central App on your mobile device. The app will guide you through the activation process with your internet service provider (ISP), setting up and customizing your Wi-Fi network, and adding devices. Most major U.S. cable internet service providers are supported.

Figure 3: ISP Approved ARRIS G20
This image displays the ARRIS G20 modem on a table, surrounded by logos of various Internet Service Providers (ISPs) it is approved for, including Xfinity, Cox, Spectrum, Astound Broadband, Grande Communications, RCN, Sparklight, Wave, and WOW!.
Operating Your G20
The ARRIS SURFboard G20 is engineered for high-performance networking, providing a robust and reliable internet experience.
Key Technologies:
- DOCSIS 3.1: This is the latest standard for cable internet, offering significantly faster speeds (up to 10x faster than DOCSIS 3.0), improved security, and reduced latency, crucial for gaming and high-bandwidth activities.
- Wi-Fi 6 (802.11ax): Provides faster wireless speeds, greater capacity for multiple devices, and improved efficiency in congested network environments. This ensures a smooth experience even with numerous connected devices.
- Next-Generation Upload Optimization: The G20 features switchable upstream filters, supporting optimized upload service tiers (provider dependent) to achieve speeds up to 450 Mbps. This is particularly beneficial for video conferencing, cloud backups, and content creation.
Connectivity:
- Ethernet Ports: The G20 includes multiple Gigabit Ethernet LAN ports for high-speed wired connections to devices like computers, gaming consoles, and smart TVs.
- Dual-Band Wi-Fi: Operates on both 2.4 GHz and 5 GHz frequency bands, allowing for flexible connections. The 2.4 GHz band offers wider coverage, while the 5 GHz band provides faster speeds for closer devices.
Advanced Features:
- Guest Mode: Create a separate network for guests, keeping your main network secure.
- Internet Security: Built-in features to help protect your network from unauthorized access and threats.
- Parental Control: Manage internet access for specific devices, set time limits, and pause internet access as needed. These features are typically managed through the SURFboard Central App.
Video 1: ARRIS G20 Product Overview
This video provides a brief overview of the ARRIS G20 Cable Modem Router Combo, highlighting its key features and benefits for home networking.
Maintenance
To ensure optimal performance and longevity of your ARRIS SURFboard G20, consider the following maintenance tips:
- Placement: Position the modem in a central location, away from obstructions, large metal objects, and other electronic devices that may cause interference. Ensure adequate ventilation to prevent overheating.
- Cleaning: Periodically clean the exterior of the modem with a soft, dry cloth. Avoid using liquid cleaners or abrasive materials. Ensure vents are clear of dust and debris.
- Firmware Updates: The G20's firmware is typically updated automatically by your Internet Service Provider. However, if you experience issues, check the SURFboard Central App or your ISP's support page for information on manual updates or status.
- Rebooting: Occasionally rebooting your modem can resolve minor connectivity issues and improve performance. Simply unplug the power adapter, wait 30 seconds, and then plug it back in.
Troubleshooting
If you encounter issues with your ARRIS SURFboard G20, try the following troubleshooting steps:
- No Internet Connection:
- Check all cable connections (coaxial, Ethernet, power) to ensure they are secure.
- Reboot the modem by unplugging it from the power outlet for 30 seconds and then plugging it back in.
- Verify that your ISP service is active and there are no local outages.
- Check the status indicator lights on the front of the G20. Refer to the Quick Start Guide for light interpretations.
- Slow Speeds:
- Ensure your devices are connected to the appropriate Wi-Fi band (5 GHz for faster speeds, 2.4 GHz for wider range).
- Reduce the number of active devices or applications consuming high bandwidth.
- Perform a speed test to confirm your internet speed. Compare it with your ISP plan.
- Consider the placement of your modem to minimize interference and maximize Wi-Fi signal strength.
- Wi-Fi Connectivity Issues:
- Ensure your Wi-Fi network is enabled on the G20 (check via SURFboard Central App).
- Verify your Wi-Fi password.
- Try forgetting and rejoining the Wi-Fi network on your device.
- If issues persist, a factory reset may be necessary (refer to the Quick Start Guide for instructions, as this will erase all custom settings).
For more detailed troubleshooting or persistent issues, consult the full user manual available on the ARRIS support website or contact your Internet Service Provider.
Specifications
| Feature | Description |
|---|---|
| Model Name | G20 |
| DOCSIS Standard | DOCSIS 3.1 |
| Wi-Fi Standard | Wi-Fi 6 (802.11ax) |
| Frequency Band Class | Dual-Band (2.4 GHz, 5 GHz) |
| Max Download Speed | Up to 1.0 Gbps (ISP dependent) |
| Max Upload Speed | Up to 450 Mbps (Next-Generation Upload Optimized, ISP dependent) |
| Ethernet Ports | Multiple Gigabit Ethernet LAN ports |
| Product Dimensions | 9.53 x 7.68 x 4.41 inches |
| Item Weight | 2.4 pounds |
| Compatible Devices | Gaming Console, Security Camera, Personal Computer, Smart Television, Smartphone |
| Special Features | Guest Mode, Internet Security, Parental Control |
| Manufacturer | Vantiva |
| Country of Origin | Vietnam |
Warranty and Support
The ARRIS SURFboard G20 comes with a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation included with your product or visit the official ARRIS support website.
Protection Plans:
Extended protection plans may be available for purchase to provide additional coverage beyond the standard warranty. These plans typically offer:
- 3-Year Protection Plan
- 4-Year Protection Plan
- Complete Protect (monthly plan covering multiple eligible purchases)
For detailed information on these plans, including pricing and coverage, please check the product listing on Amazon or contact the plan provider.
Customer Support:
If you require technical assistance, have questions about your product, or need to initiate a warranty claim, please contact ARRIS customer support or your Internet Service Provider. You can often find support resources, FAQs, and contact information on the ARRIS website or through the SURFboard Central App.





