Home / Collections / All Products / Motorola DOCSIS 3.0 Cable Modem + WiFi 5 Router with 2 Phone Lines for Xfinity Voice, 840 Mbps Speed | mt7711

Motorola DOCSIS 3.0 Cable Modem + WiFi 5 Router with 2 Phone Lines for Xfinity Voice, 840 Mbps Speed | mt7711

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Motorola DOCSIS 3.0 Cable Modem + WiFi 5 Router with 2 Phone Lines for Xfinity Voice, 840 Mbps Speed | mt7711

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  • Description
  • Tech Specs
  • compatible with Xfinity Internet & Voice service

    Certified by Comcast for Xfinity. Compatible with Xfinity Triple Play. NOT compatible with Verizon, AT&T, CenturyLink, DSL providers, DirecTV, DISH and non-Xfinity voice services.

    high-speed DOCSIS 3.0 cable modem

    Features 4 Gigabit Ethernet ports for wired connections. Recommended by Comcast for Xfinity Internet service speeds up to 600 Mbps.

    powerful AC1900 router

    Delivers up to 1900 Mbps wireless speed. Power Boost, Range Boost, and AnyBeam WiFi beamforming enable quality streaming, gaming, and connecting throughout the home.

    comes with 2 phone lines

    For use with Xfinity Voice service only. Enjoy crystal-clear calling and enhanced features like caller ID, call forwarding, conference calling, and more.

    extreme cost savings

    Save up to $168 per year on cable modem rental fees (savings described is for Comcast Xfinity service). Comes with a 2-year warranty and free support from our USA team of connectivity technicians.

  • General

    Cable Modem Service Interface

    • F-type female 75 Ω (standard coaxial connector

    Telephony Interface

    • Two (2) RJ-11 telephone ports for use with Comcast XFINITY®
    • Optional 8-hour battery backup (sold separately)*
    • Supports enhanced call features like caller ID, call forwarding, conference calling, and more

    WiFi Technology

    • 802.11ac/n/g/b/a, 3x3 MIMO (Multiple Input Multiple Output)

    WiFi Speed and Performance

    • Simultaneous Dual Band radios
    • Up to 600 Mbps*** at 2.4 GHz
    • Up to 1300 Mbps*** at 5 GHz
    • Anybeam at 2.4 GHz and 5 GHz for implicit beamforming with any WiFi compatible device
    • Six (6) SSIDs (3 per radio)

    Wireless Standards

    • IEEE 802.11ac, n, g, b, and a


    • Three (3) internal dual antennas
    • Power Boost wireless amplifiers
    • Transmit power:
      2.4 GHz: Up to 30dBm
      5 GHz: Up to 28dBm

    Ethernet Interface

    • Four (4) 10/100/1000 Mbps Ethernet LAN ports, with Auto-MDI/MDIX

    Router Mode

    • Dynamic DNS
    • DHCP Server and Client
    • NAT
    • Bridging
    • Port Forwarding/DMZ support
    • RIP V1 and V2
    • Support for up to 253 client devices

    Networking and Security Features

    • Stateful Packet Inspection (SPI)
    • VPN passthrough: PPTP, IPsec tunneling
    • Attack Protection
    • IP/MAC/Port filtering
    • Denial of Service Notification
    • Supports Baseline Encryption (BPI) Management
    • Wireless Functions: WMM/WME, guest network
    • Wireless Security: WPA-PSK/WPA2-PSK, WPA/WPA2, TKIP/AES, WPS, 802.1x Authentication
    • Password protected system management
    • Cable modem diagnostic log


    • Front Panel:
      Power, Downstream, Upstream, Online, 2.4 GHz WiFi, 5 GHz WiFi, WPS, Telephone line 1, Telephone line 2, Battery
    • Rear Panel:
      Each Ethernet port has two LEDs indicating data flow and LAN connection speed. Green indicates 1 Gbps; amber indicates 10 or 100 Mbps. Blinking indicates data flow.


    • 2 1⁄4" wide x 8 1⁄4" deep x 9" tall (57 mm x 210 mm x 229 mm)


    • 30.4 ounces (862 grams)

    Power Adapter

    • DoE-compliant Level VI energy-saving, UL-listed power adapter with 12 Volt DC, 4 Amp output and 100-240VAC universal input
    • NEMA 1-15 (North American style) 2-prong plug is provided in the US.

    Operating Temperature

    • 32° to 104° F (0° to 40° C)


    • FCC 15B, 15C and 15E, FCC MPE, Bureau Veritas 60950-1 ITE safety, CableLabs®, cable service providers

    Surge Protection

    • Ruggedized cable and power lightning protection


    • Two years

    System Requirements

    • The cable modem must be connected to a cable modem service that uses any of the DOCSIS standards – 3.0, 2.0, 1.1
    • Comcast XFINITY’s telephone service is required to use the 2 telephone lines

    Package Contents

    • Cable Modem with built-in WiFi Router and 2 phone lines
    • Power Cube (UL listed)
    • Ethernet Cable (Cat 5e)
    • Phone Cord
    • Velcro® Cable Tie
    • Coax Connection Tool
    • Quick Start Flyer

    Operating Parameters

    DOCSIS Standards

    • DOCSIS 3.0, 2.0, 1.1


    • Data Rate: Up to 1029 Mbps***
    • Bonded Channels: Up to 24 SCQAM
    • Frequency Range: 108 to 1002 MHz
    • Modulation: 64 or 256 QAM
    • Operating Level Range: -15 to +15 dBmV


    • Data Rate: Up to 246 Mbps***
    • Bonded Channels: Up to 8 SCQAM
    • Frequency Range: 5 to 42 MHz
    • Modulation: QPSK, 8QAM, 16QAM, 32QAM, 64QAM, 128QAM, 256QAM
    • Operating Level Range:
      +61 dBmV (64 QAM, single channel)
      +54 dBmV (64QAM, 4-8 channels)
      +61 dBmV (16 QAM, single channel)

    Network Protocols


    Application Protocol

    • SNMP v1/v2/v3

    DHCP Client

    • Automatically retrieves IP and DNS server address from DHCP server through WAN connection

    ToD (RF868)

    • ToD support for local and MSO time synchronization


    • Web-based management interface utility

    * Optional battery (sold separately) lets you make phone calls even if AC power is lost. Battery lasts at least 8 hours with phones on-hook, at least 5 hours with one phone in use for a call.

    ** Speeds shown are maximum wireless speeds derived from IEEE Standard 802.11 specifications. Actual speeds will vary.

    ***1029/246 Mbps is the maximum nominal download/upload speed for 24x8 DOCSIS 3.0 cable modems. Actual speeds depend on a number of factors including the speed of your cable modem service, and will typically be slower.

Customer Reviews

Based on 64 reviews
Barbara M.

It took quite a while for Xfinity to activate it to get it to work and they were going to send a technician out to do so but finally they got it to work after 1-1/2 hours on the phone. But so far so good - I am happy with it. But here we are just a couple weeks later and I see that it's now on sale for $20 less. Of course that doesn't make me happy.


Works excellent

David W.S.

You do need help from a tech While I’m not particularly technically inclined with help this product works very well


It has been working fine since I put it up about three weeks ago I do not see any difference from the box I was renting from Xfinity I did have to call the Xfinity people and let them know I was switching boxes the first person I talk to forget it didn’t have a clue the second person I got took less than 10 minutes and I was on my way to a rent free box!

Popa B.

It was installed by Xfinity, so I didn't do it, but he had no trouble. it is installed in a small area, so I don't know it's range, but where we have it, it works well.