Support XFINITY Internet About the Wireless Gateway 2


The Wireless Gateway 2 (model number DPC3939) provides the functionality of a Wi-Fi router, DOCSIS 3.0 cable modem and voice modem in a single device. If you have both XFINITY Voice and XFINITY Internet services, the wireless gateway is an all-in-one way to stay connected and manage a home network.


  • High Speed Internet: The Wireless Gateway 2 contains a DOCSIS 3.0 cable modem, which means some of the fastest download speeds available.
  • Dual-Band Wi-Fi: The Wireless Gateway 2 provides dual-band Wi-Fi (2.4 and 5 GHz). Connect multiple computers, laptops, tablets and other Wi-Fi devices to the Internet wirelessly, with higher maximum throughput (200 Mbps) using 5 GHz. Compatible devices include (but are not limited to):
    • Amazon Kindle Fire HDX 8.9"
    • Apple iPad 4
    • Apple iPad Mini
    • Apple Macbook Pro (ac)
    • Buffalo WLI-H4-D1300
    • Dell Latitude E5430 (Windows 7/Ubuntu)
    • Microsoft Xbox One
    • NETGEAR A6200
    • Roku 3
    • Samsung Galaxy S5
  • Gigabit Ethernet Ports: Connect up to 4 wired devices to the Wireless Gateway 2.
  • Home Networking: Connect your computers, printers and other devices to the Wireless Gateway 2 to access the Internet both wirelessly and with cables.
  • Built-In Security: The Wireless Gateway 2 comes with Comcast-recommended settings for a secure network (e.g., firewall, Wi-Fi). However, for added security, Comcast recommends changing the default password for the administration site (Admin Tool) to a password of your own.
  • Phone Service: The Wireless Gateway 2 supports your XFINITY Voice service with 2 analog telephone ports (if you also subscribe to XFINITY Voice service).

To download the Wireless Gateway 2 Quick Start Guide and the User Manual for your specific model number, see Wireless Gateway Guides.

Front Panel

The front panel of the Wireless Gateway 2 displays a series of LED lights, which indicate different features. You can use the following image to further familiarize yourself with the front panel.
Image of front panel of Wireless Gateway 2 with explanation of icons on the panel.  Explanation mirrors the text below the image.

Front panel items include:

  • Power: AC power status
  • US/DS: Upstream/downstream connectivity
  • Online: Internet connectivity status
  • 2.4 GHz Wi-Fi: Wireless LAN status for 2.4 GHz band*
  • 5 GHz Wi-Fi: Wireless LAN status for 5 GHz band*
  • Tel1/Tel2: Phone line status
  • Battery: Battery power status

Note: Both the 2.4 GHz and 5 GHz wireless gateway LED lights will flash as your device sends and receives data.

Back Panel

On the back panel of the Wireless Gateway 2 you will find several ports and buttons. Refer to the following image to familiarize yourself with the back panel.
Image of rear panel of Wireless gateway 2 with explanation of the connections.  Explanation mirrors the text above the image.

Back panel items include:

  • The Reset button allows you to reboot the Wireless Gateway 2 if you experience connectivity issues.
  • USB 2.0 connectors (future capability).
  • Telephone connectors allow you to connect 2 lines of telephone service if you have 2 numbers.
  • Home alarm port.
  • Ethernet ports allow you to connect up to 4 devices (such as computers, game systems and printers) to your home network with an Ethernet cable.
  • MoCA LED.
  • The Cable connector provides Internet service to the wireless gateway through a coaxial cable, the same kind of cable that transmits TV service to your set-top box.
  • The Power connector is for the wireless gateway's power cord.

Top Panel

The top panel of the Wireless Gateway 2 features the WPS (Wi-Fi Protected Setup) and Page buttons.

  • The WPS LED button connects WPS-compatible devices to your network.
  • The Page button is used to register and pair DECT CAT-iq 2.0 handsets to the Wireless Gateway 2 (future capability).

Installing the Wireless Gateway Battery (Only for XFINITY Voice Service)

A backup battery can be installed in your Wireless Gateway 2 to provide additional hours of XFINITY Voice service during a power outage. Visit Purchase a Battery for Your XFINITY Voice Phone Modem for more information on purchasing a battery. (Backup batteries are not available for purchase from Comcast by Unlimited Select customers.)

For help installing a battery, see Install a Backup Battery in Your Wireless Gateway.

Admin Tool

You can view and adjust your router and network settings--including features like Parental Controls, security settings and your Network Names (SSIDs) and Network Password (Key)--through the Wireless Gateway 2's Admin Tool, which is located online at

To learn about advanced features, see Advanced Wireless Gateway Features.

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