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Motorola DOCSIS 3.0 Cable Modem, up to 550 Mbps speed | mb7420

Motorola DOCSIS 3.0 Cable Modem, up to 550 Mbps speed | mb7420

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  • Description
  • Tech Specs
  • high-speed DOCSIS 3.0 performance

    Compatible with major U.S. cable Internet providers including Comcast Xfinity, Cox, Spectrum and others.

    fast, reliable Internet

    Supports cable Internet service plans with speeds up to 300 Mbps for faster downloads, HD streaming, and better gaming.

    works with any router

    Seamlessly pair with any WiFi router to connect all your wireless devices. This cable modem does not have a built-in wireless router or telephone capability.

    extreme cost savings

    Save up to $168 per year on modem rental fees with your Internet provider.

    simple setup and use

    Easy self-installation. Comes with a 2-year warranty and free support from our team of US-based technicians.

    motosync app

    It's like having our product experts in your home with one tap using in-app live chat support.


    Cable Modem Service Interface

    • F-type female 75 Ω (standard coaxial connector)

    Ethernet LAN Interface

    • RJ-45 10/100/1000 Mbps Ethernet, with Auto-MDI/MDIX

    Status Indicators

    • Ethernet link, Connection status, Upstream link, Downstream link, Power


    • 6.1" H x 4.9" D x 2" W
      (155mm x 124mm x 51mm)


    • 9.3 ounces (264 grams)

    Power Adapter

    • DoE-compliant Level VI energy-saving, UL-listed power adapter with 12 Volt DC, 1 Amp output and 110VAC nominal input.
      NEMA 5-15 (North American style) plug is provided in the US.

    Operating Temperature

    • 32° to 104° F (0° to 40° C)


    • FCC part 15B, Bureau Veritas 60950-1 ITE safety, CableLabs®, cable service providers

    Surge Protection

    • Ruggedized cable and power lightning protection


    • Two years

    Operating Parameters


    • Data Rate*:
      Up to 686 Mbps (16 channels)
      Up to 43 Mbps (single channel)
    • Frequency:
      108 to 1002 MHz (edge to edge)
    • Modulation:
      64 or 256 QAM
    • Operating Level Range:
      -15 to +15 dBmV


    • Data Rate*:
      Up to 123 Mbps (4 channels), Up to 31 Mbps (single channel)
    • Frequency:
      5 to 85 MHz (edge to edge)
    • Modulation:
      QPSK, 8QAM, 16QAM, 32QAM, 64QAM,128QAM, 256QAM
    • Operating Level Range:
      +8 to +54 dBmV (32QAM, 64QAM)
      +8 to +58 dBmV (QPSK)
      +8 to +53 dBmV (all modulations)
    • Security:
      DOCSIS 3.0 Security (BPI+, EAE, SSD)
    • Network Protocols:
    • Application Protocol:
      SNMP v1/v2/v3
    • DHCP Client:
      Automatically retrieves IP and DNS server address from DHCP server at ISP
    • ToD (RF868):
      ToD support for local and MSO time synchronization
    • TFTP Client:
      TFTP support for cable modem configuration file download
    • Management:
      Web-based management interface utility
    • Core Chipset:
      Broadcom BCM33843D

    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
    • The supplied power cube plugs into the most common USA power outlet.

    Package Contents

    • Cable Modem
    • Power Cube
    • Ethernet Cable
    • Velcro® Cable Organizer
    • Coax Connection Tool
    • Quick Start Flyer

    * Data throughput will be reduced by network overhead. Delivered data speeds are also dependent upon the configuration and capacity of the data-over-cable service on which the MB7420 is used.

Customer Reviews

Based on 186 reviews
Vaughn s.

Very easy to set up just plug and go really


As advertised easy install. Used it with Xfinity service no problems.

Bill K.

All Modems are rated with the absolute maximum speed it delivers, with this modem it is 686 Mbps. Comcast cable officially approves this modem for their internet plans up to 300 Mbps.I could not be more happy with the modem, it's great!My plan with Comcast Exfinity is 300 Mbps.Advantages: It is vertical instead of horizontal. That is the only inexpensive way to allow a device to keep cool, stand it up so it radiates heat. All modems run hot. Do not cover them up. I bought this modem because someone covered our old modem with a bath towel to hide the modem and wires and make the installation look neater. It burned up, LOL. This was purchased to replace it.There is a fast, simple, easy way to keep any vertical modem from falling over: Velcro ! DUH! Foolproof way to mount things. What could be easier? If I tug on the cable, this modem will not fall over.The numbers you need to provide to your cable company to register any modem to any provider is on the bottom, which you will probably cover up with velcro, so write them all down. Happily they are actually printed large enough to read. That's unusual, LOL.MODEL NUMBER MB7420 (need to tell your cable company to register)Serial Number S/N (need to tell your cable company to register)MAC address (need to tell your cable company to register)IP ADDRESS (probably never need to know this, but maybe) 192 168 100.1USER NAME admin PASSWORD MOTOROLA (probably never need to know this, but maybe)Registering with some cable companies can be done online, others require you to give them a phone call. You only have to do that once in the life of the modem, unless you switch cable company providers. All companies require registration. That is how they know this particular modem is being used by a paying subscriber and not someone stealing cable signals illegally.The 5 indicator lights are not just round, they are icons which tell which each light means. Which is handy when trouble shooting. Easier to know what the problem is.The modem does it's job nicely and does not have any issues.


regularly get 400 mb/s through this and my router (have a 300 plan).so no issues!

Susan K.

My son in law connected it and it’s been working great