ARRIS SURFboard G18 Cable Modem Router Combo User Manual

1. Product Overview

The ARRIS SURFboard G18 DOCSIS 3.1 Wi-Fi 6 cable modem router combo integrates the latest technology to provide enhanced download and upload speeds within a single device. Its DOCSIS 3.1 capability supports gig-speed cable internet plans, ensuring high-performance connectivity. Equipped with Wi-Fi 6 (802.11ax) dual-band technology, the SURFboard G18 offers faster Wi-Fi speeds and extended range compared to previous Wi-Fi generations. Additionally, optimized next-generation upload speeds allow the G18 to achieve up to 100Mbps upstream, facilitating smooth video conferencing and rapid data uploads.

Key Features

• Fast, Reliable Connection: Experience high-speed streaming, gaming, and browsing with a trusted brand.
• Advanced Modem Technology: Utilizes DOCSIS 3.1 for superior speeds, enhanced security, and smoother online gaming.
• Strong Wi-Fi 6 Coverage: Dual-band Wi-Fi 6 delivers faster and broader wireless performance throughout your home.
• Service Compatibility: Compatible with major Internet Service Providers (ISPs) including Xfinity, Spectrum, and Cox.
• Cost Savings: Owning your modem can help reduce or eliminate monthly rental charges from your ISP.

Save on Fees

DOCSIS 3.1

Modem + Router

Package Contents

• ARRIS SURFboard G18 WiFi 6 Cable Modem Router
• AC Power Adapter
• Quick Start Guide

Figure 1: Front view of the ARRIS SURFboard G18.

Figure 2: Compatible Service Providers.

2. Setup Guide

Follow these steps to set up your ARRIS SURFboard G18 cable modem router combo.

2.1 Before You Begin

• Ensure you have an active cable internet service subscription.
• Locate a coaxial cable outlet in your home.
• Have your Internet Service Provider (ISP) account information ready, including your account number and login credentials.

2.2 Connection Steps

1. Connect Coaxial Cable: Connect one end of the coaxial cable (not included) to the cable wall outlet and the other end to the CABLE port on the back of your SURFboard G18.
   

   Figure 3: Back panel of the ARRIS SURFboard G18.

2. Connect Power Adapter: Connect the AC power adapter to the POWER port on the back of your SURFboard G18 and then plug it into an electrical outlet.
3. Power On: The device will automatically power on. Wait for the LED indicators on the front to stabilize. The Power, Downstream, Upstream, and Internet LEDs should turn solid green or blue, indicating a successful connection.
4. Connect a Device (Optional): For initial setup or wired connection, connect an Ethernet cable from one of the Ethernet ports on the SURFboard G18 to your computer.

2.3 Activation with Your ISP

After connecting the hardware, you need to activate the SURFboard G18 with your Internet Service Provider (ISP). Most ISPs offer self-activation portals or phone support.

• Self-Activation: Open a web browser on a connected device. You may be redirected to your ISP's activation page. Follow the on-screen instructions.
• Phone Activation: If self-activation fails, call your ISP's customer support. Provide them with the MAC address (CM MAC) and Serial Number (S/N) located on the label on the bottom of your SURFboard G18.

Figure 4: Internet connection diagram.

3. Operating Instructions

Once activated, your SURFboard G18 will provide internet access. Here's how to manage its operation.

3.1 LED Indicators

The LEDs on the front panel provide status information:

• Power: Solid Green - Power On; Off - Power Off.
• Downstream: Solid Blue - DOCSIS 3.1 connection; Solid Green - DOCSIS 3.0 connection; Blinking - Scanning for connection.
• Upstream: Solid Blue - DOCSIS 3.1 connection; Solid Green - DOCSIS 3.0 connection; Blinking - Scanning for connection.
• Internet: Solid Green - Online; Blinking - Data activity.
• Wi-Fi: Solid Green - Wi-Fi enabled; Blinking - Wi-Fi activity; Off - Wi-Fi disabled.

3.2 Connecting Devices

• Wired Devices: Use Ethernet cables to connect devices like computers, gaming consoles, or smart TVs to the Ethernet ports on the back of the G18.
• Wireless Devices: Connect Wi-Fi enabled devices (smartphones, tablets, laptops) using the Wi-Fi Network Name (SSID) and Password found on the label on the bottom of your G18.

3.3 SURFboard Central App

Manage your home network settings, parental controls, and guest Wi-Fi through the SURFboard Central mobile application. Download it from your device's app store.

Figure 5: SURFboard Central App icon.

4. Maintenance

Proper maintenance ensures optimal performance and longevity of your SURFboard G18.

• Placement: Place the device in a central location, away from obstructions, heat sources, and direct sunlight for best Wi-Fi coverage and ventilation.
• Cleaning: Use a soft, dry cloth to clean the exterior. Do not use liquid cleaners or aerosols.
• Firmware Updates: Firmware updates are typically managed automatically by your ISP. Do not attempt to manually update firmware unless instructed by ARRIS support or your ISP.
• Rebooting: Periodically rebooting your modem router (unplugging power for 30 seconds and plugging back in) can resolve minor connectivity issues and improve performance.

5. Troubleshooting

If you encounter issues with your SURFboard G18, try these common troubleshooting steps.

5.1 No Internet Connection

• Check Cables: Ensure all cables (coaxial, Ethernet, power) are securely connected.
• Check LEDs: Verify that the Power, Downstream, Upstream, and Internet LEDs are solid green or blue. If any are blinking or off, there might be an issue with your ISP connection.
• Reboot Device: Unplug the power adapter from the G18, wait 30 seconds, then plug it back in. Allow several minutes for the device to restart and reconnect.
• Contact ISP: If the issue persists after rebooting and checking connections, contact your Internet Service Provider to confirm service status in your area.

5.2 Slow Internet Speed

• Test Wired Connection: Connect a computer directly to the G18 via Ethernet and test the speed. If wired speed is good but Wi-Fi is slow, the issue might be with your Wi-Fi signal.
• Wi-Fi Interference: Move the G18 away from other electronic devices that might cause interference (e.g., cordless phones, microwaves).
• Channel Optimization: Use the SURFboard Central app to check for optimal Wi-Fi channels to reduce interference from neighboring networks.
• ISP Plan: Verify that your internet plan from your ISP supports the speeds you expect.

5.3 Wi-Fi Signal Issues

• Device Proximity: Ensure your Wi-Fi devices are within reasonable range of the G18.
• Obstructions: Walls, floors, and large metal objects can degrade Wi-Fi signals. Try to place the G18 in an open, central location.
• Too Many Devices: If many devices are connected and actively using bandwidth, performance may decrease.

6. Specifications

7. Warranty and Support

7.1 Warranty Information

The ARRIS SURFboard G18 comes with a limited warranty. Please refer to the warranty card included in your product packaging or visit the official ARRIS website for detailed warranty terms and conditions.

7.2 Technical Support

For technical assistance, troubleshooting, or product inquiries, please contact ARRIS customer support:

• Online Support: Visit the official ARRIS support website for FAQs, documentation, and support resources.
• Phone Support: Refer to the Quick Start Guide or ARRIS website for regional contact numbers.
• SURFboard Central App: The app may also provide direct access to support resources.

You can also visit the ARRIS Store on Amazon for more product information.