Support XFINITY Internet About the Wireless Gateway 2


The Wireless Gateway 2 (model number DPC3939) provides the functionality of a WiFi 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 WiFi: The Wireless Gateway 2 provides dual-band WiFi (2.4 and 5 GHz). Connect multiple computers, laptops, tablets and other WiFi devices to the Internet wirelessly, with higher maximum throughput (200 Mbps) using 5 GHz.
  • Gigabit Ethernet Ports: Connect up to four 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, WiFi). 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 two 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.

Front panel items include:

  • Power: AC power status
  • US/DS: Upstream/downstream connectivity
  • Online: Internet connectivity status
  • 2.4 GHz WiFi: Wireless LAN status for 2.4 GHz band*
  • 5 GHz WiFi: Wireless LAN status for 5 GHz band*
  • Tel1/Tel2: Phone line status
  • Battery: Battery power status
Front panel of Wireless Gateway 2

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.

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 two lines of telephone service if you have two numbers.
  • Home alarm port.
  • Ethernet ports allow you to connect up to four 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.
Back panel of Wireless Gateway 2

Top Panel

The top panel of the Wireless Gateway 2 features the WPS (WiFi Protected Setup) button. The WPS LED button connects WPS-compatible devices to your network.

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 and Local 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 the admin tool, see Securing Your Wireless Gateway Network. To learn about advanced features, see Using Advanced Wireless Gateway Features.

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