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Tuesday, January 9th, 2018 7:00 AM

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ANSWERED: Comcast Modem Wireless Gateway Device/Feature Comparison

Xfinity Gateways and xFi Gateways are all-in-one devices that deliver internet and voice connectivity, whole-home WiFi coverage, network security, control and speed for the ultimate connected experience.

General features of our latest devices, the xFi Advanced Gateways, include:

  • Secure wireless home network with xFi Advanced Security
  • Secondary Xfinity Hotspot network
  • Exclusive WiFi management tools and parental controls (xFi)
  • Extended whole-home coverage with WiFi Boost Pods
  • Up to 1 Gigabit (Gb) speeds or more, depending on the model
  • Internet connectivity through Ethernet connection (two or four ports)
  • Connection for one to two phone lines
  • Regular automatic updates to improve speed, coverage, control and security

Find out more about the benefits of renting an xFi Gateway.

Xfinity Gateway models

We are always improving our equipment, and we recommend updating your device every two to three years in order to get the most out of your Xfinity Internet subscription. For specific details on all of our available gateway models, please see below.

Note: Looking for your gateway model number? Review the equipment’s bottom panel, visit your Devices page on xfinity.com or use the Xfinity app.

XFI ADVANCED GATEWAY (XB8)

The latest generation xFi Advanced Gateway allows you to supercharge your home with supersonic WiFi.

  • It’s super-fast at handling multi-Gig speeds, capable of powering hundreds of devices at once and has three times the bandwidth for more reliable connections.
  • It blocks billions of threats annually with Advanced Security and is made to do anything, so you can do everything.
  • Learn more about this new gateway.

The xFi Advanced Gateway XB8 is displayed.

  • Model Numbers: CGM4981COM
  • Friendly Model Name: XB8
  • Gb Ethernet Ports: 4
  • Tri-Band WiFi Option: Yes
  • 2.4GHz Connected Client Limit: 100
  • 5GHz Connected Client Limit: 100
  • 6GHz Connected Client Limit: 100
  • Maximum Data Throughput: 2.5 Gbps
  • WPS (WiFi Protected Setup): Yes
  • Gateway / Network Management Tool (http://10.0.0.1): Yes
  • Xfinity xFi Eligible: Yes
  • Xfinity xFi Advanced Security: Yes
  • Xfinity app Activation: Pro-Install until April 2022
  • Two Total Telephone Ports: Yes (separate Alarm Port)
  • Battery Backup Capability (Xfinity Voice Only): Yes
    • The xFi Advanced Gateway (XB7 and higher) is the only device currently offering a backup battery for purchase (non-EPON)
  • Link Cordless Phones (CAT-iq 2.0*): Yes
  • Home Hotspot Capable: Yes
  • Compatible With Xfinity Home Pro Protection: Yes
  • Compatible With Xfinity Home Self Protection: Yes
  • Compatible With Xfinity Storm-Ready WiFi: Yes

View and download xFi Advanced Gateway (XB8) resources:

XFI ADVANCED GATEWAY (XB7)

Our xFi Advanced Gateway (XB7) offers a new colorway (white/gray) to compliment your home decor, including a less disruptive LED light. It also has the fastest speeds, more ports, the widest coverage, exclusive WiFi management tools, parental controls and WiFi Boost Pods for extended coverage.

xFi Gateway 3rd Generation

  • Model Numbers: CGM4331COM and TG4482A
  • Friendly Model Name: XB7
  • Gb Ethernet Ports: 4
  • Dual-Band WiFi Option: Yes
  • 2.4GHz Connected Client Limit: 75
  • 5GHz Connected Client Limit: 75
  • Maximum Data Throughput: 2.5 Gbps
  • WPS (WiFi Protected Setup): Yes
  • Gateway / Network Management Tool (http://10.0.0.1): Yes
  • Xfinity xFi Eligible: Yes
  • Xfinity xFi Advanced Security: Yes
  • Xfinity app Activation: Yes
  • Two Total Telephone Ports: Yes (separate Alarm Port)
  • Battery Backup Capability (Xfinity Voice Only): Yes
    • The xFi Advanced Gateway (XB7 and higher) is the only device currently offering a backup battery for purchase (non-EPON)
  • Link Cordless Phones (CAT-iq 2.0*): Yes
  • Home Hotspot Capable: Yes
  • Compatible With Xfinity Home Pro Protection: Yes
  • Compatible With Xfinity Home Self Protection: Yes
  • Compatible With Xfinity Storm-Ready WiFi: Yes


View and download xFi Advanced Gateway (XB7) resources:

XFI ADVANCED GATEWAY (XB6)

Our xFi Advanced Gateway offers up to 1Gb speeds, wide coverage, exclusive WiFi management tools, parental controls and WiFi Boost Pods for extended coverage. Its attractive design lends itself to being positioned in a central open area for best broadcasting.

Xfinity xFi advanced gateway


  • Model Numbers: TG3482G and CGM4140COM
  • Friendly Model Name: XB6
  • Gb Ethernet Ports: 2
  • Dual-Band WiFi Option: Yes
  • 2.4GHz Connected Client Limit: 30
  • 5GHz Connected Client Limit: 75
  • Maximum Data Throughput: 1 Gbps
  • WPS (WiFi Protected Setup): Yes
  • Gateway / Network Management Tool (http://10.0.0.1): Yes
  • Xfinity xFi Eligible: Yes
  • Xfinity xFi Advanced Security: Yes
  • Xfinity app Activation: Yes
  • Two Total Telephone Ports: Yes
  • Battery Backup Capability (Xfinity Voice Only): Yes
    • Backup battery no longer offered for this device
      • Previously purchased backup batteries may still be used
    • The xFi Advanced Gateway (XB7 and higher) is the only device currently offering a backup battery for purchase (non-EPON)
  • Link Cordless Phones (CAT-iq 2.0*): Yes
  • Home Hotspot Capable: Yes
  • Compatible With Xfinity Home Pro Protection: Yes
  • Compatible With Xfinity Home Self Protection: Yes
  • Compatible With Xfinity Storm-Ready WiFi: No

View and Download Xfinity xFi Advanced Gateway (XB6) Resources:

XFI WIRELESS GATEWAY

Our xFi Wireless Gateway offers the speed, coverage, WiFi management tools, parental controls and WiFi Boost Pods (excluding DPC3939) for extended coverage.

Xfinity xFi Gateway


  • Model Numbers: DPC3939, DPC3941T, TC8717 and TG1682G
  • Friendly Model Name: XB3
  • Gb Ethernet Ports: 4
  • Dual-Band WiFi Option: Yes
  • 2.4GHz Connected Client Limit: 30
  • 5GHz Connected Client Limit: 30
  • Maximum Data Throughput: 600 Mbps
  • WPS (WiFi Protected Setup): Yes
  • Gateway / Network Management Tool (http://10.0.0.1): Yes
  • Xfinity xFi Eligible: Yes
  • Xfinity xFi Advanced Security: Yes (excluding DPC3939)
  • Xfinity app Activation: Yes
  • Two Total Telephone Ports: Yes (separate Alarm Port)
  • Battery Backup Capability (Xfinity Voice Only): Yes
    • Backup battery no longer offered for this device
      • Previously purchased batteries may still be used
    • The xFi Advanced Gateway (XB7 and higher) is the only device currently offering a backup battery for purchase (non-EPON)
  • Link Cordless Phones (CAT-iq 2.0*): Yes (excluding TC8717)
  • Home Hotspot Capable: Yes
  • Compatible With Xfinity Home Pro Protection: Yes
  • Compatible With Xfinity Home Self Protection: Yes
  • Compatible With Xfinity Storm-Ready WiFi: No

Download a User Guide:

XFI FIBER GATEWAY

This WiFi gateway/MTA solution provides complete home connectivity and coverage at high speeds at our Fiber-to-the-Unit properties.

Xfinity xFi Fiber Gateway

  • Model Numbers: Arris X5001
  • Friendly Model Name: XF3
  • Gb Ethernet Ports: 4
  • Band WiFi Option: Yes
  • Maximum Data Throughput: 1 Gbps
  • WPS (WiFi Protected Setup): Yes
  • Gateway / Network Management Tool (http://10.0.0.1): Yes
  • Xfinity xFi Eligible: Yes
  • Xfinity xFi Advanced Security: Yes
  • Xfinity app Activation: No
  • Two Total Telephone Ports: Yes
  • Battery Backup Capability (Xfinity Voice Only): Yes
    • A backup battery is available to purchase for use with the XF3 in EPON (fiber-to-the-unit) properties
      • This battery must be installed by a technician
  • Link Cordless Phones (CAT-iq 2.0*): No
  • Home Hotspot Capable: Yes
  • Compatible With Xfinity Home Pro Protection: Yes
  • Compatible With Xfinity Home Self Protection: No
  • Compatible With Xfinity Storm-Ready WiFi: No

View and Download xFi Fiber Gateway Resources:

XFINITY GATEWAY (1/2/3)

These are old Wireless Gateways with limited speeds and functionality.

Xfinity Wireless Gateway

  • Model Numbers: TC8706C, TG852G, TG862G and TC8305C
  • Friendly Model Name: XB2
  • Gb Ethernet Ports: 4
  • Dual-Band WiFi Option: Yes
  • Maximum Data Throughput: 150 Mbps
  • WPS (WiFi Protected Setup): Yes
  • Gateway / Network Management Tool (http://10.0.0.1): Yes
  • Xfinity xFi Eligible: No
  • Xfinity xFi Advanced Security: No
  • Xfinity app Activation: No
  • Two Total Telephone Ports: Yes (separate Alarm Port)
  • Battery Backup Capability (Xfinity Voice Only): Yes
    • Backup battery no longer offered for this device
      • Previously purchased batteries may still be used
    • The xFi Advanced Gateway (XB7 and higher) is the only device currently offering a backup battery for purchase (non-EPON)
  • Link Cordless Phones (CAT-iq 2.0*): Yes
  • Home Hotspot Capable: Yes
  • Compatible With Xfinity Home Pro Protection: Yes
  • Compatible With Xfinity Home Self Protection: No
  • Compatible With Xfinity Storm-Ready WiFi: No

Download a User Guide: 

Xfinity Gateway feature comparison

The following table compares all gateways.

Product features Wireless Gateway 1 xFi Fiber Gateway xFi Wireless Gateway xFi Advanced Gateway (XB6) xFi Advanced Gateway (XB7) xFi Advanced Gateway (XB8)
(Model Numbers: TG852G, TG862G, TC8305C) (Model Number: Arris X5001) (Model Numbers: DPC3941T, DPC3939, TC8717, TG1682G) (Model Number: TG3482G, CGM4140COM) (Model Numbers: CGM4331COM, TG4482A) (Model Number: CGM4981COM)
Four Total Gb Ethernet Ports Yes Yes Yes No (2) Yes Yes
Dual Band WiFi No Yes Yes Yes Yes Tri-Band WiFi
Maximum Data Throughput 150 Mbps 1 Gbps 600 Mbps
(275 Mbps for DPC3939)
1 Gbps 2.5 Gbps 2.5 Gbps
WPS (WiFi Protected Setup) Yes Yes Yes Yes Yes Yes
Gateway and Network Management Tool
(http://10.0.0.1)
Yes Yes Yes Yes Yes Yes
Xfinity xFi Eligible No Yes Yes Yes Yes Yes
Xfinity xFi Advanced Security No Yes Yes (excluding DPC3939) Yes Yes Yes
Xfinity app Activation No No Yes Yes Yes Pro-Install until April 2022
RDK-B No Yes Yes Yes Yes Yes
Two Total Telephone Ports Yes Yes Yes
(separate Alarm Port)
Yes Yes (separate Alarm Port) Yes (separate Alarm Port)
Battery Backup Availability (Xfinity Voice Only) No Yes No No Yes Yes
Eligible for an X1 Wireless TV Box / Flex Streaming TV Box No Yes Yes (excluding DPC3939) Yes Yes Yes
Link Cordless Phones (CAT-iq 2.0*) No No Yes Yes Yes Yes
Home Hotspot Capable Yes Yes Yes Yes Yes Yes
Compatible with Pro Protection Yes Yes Yes Yes Yes Yes
Compatible with Self Protection No No No Yes Yes Yes
Compatible with  Storm-Ready WiFi No No No No Yes Yes

*CAT-iq 2.0: Cordless Advanced Technology (CAT). CAT-iq 2.0 is a digital communication standard, used primarily for cordless phone systems. CAT-iq 2.0 handsets can be paired with the wireless gateway.

Using third-party equipment

Alternatively, some Xfinity customers may wish to purchase and use third-party cable modems and gateways. However, you will miss out on the full suite of Xfinity services.

Notes:

  • Before purchasing your own equipment, confirm it's recommended for use with Xfinity services and can achieve the maximum capability of your subscribed speed tier.
  • Advanced Security must be activated through the Xfinity app.

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