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mb8600 | 1Gbps DOCSIS 3.1 Cable Modem

"I wanted to save $15/month and upgrade from my ISP’s modem. This has helped get the speed I pay for."


mb8600 | 1Gbps DOCSIS 3.1 Cable Modem

$139.99 $169.99 saving $30.00
| /
  • Compatible with Xfinity, Cox, Spectrum & more
  • Save up to $168* per year vs renting
  • 2 year warranty, Unlimited Support
$139.99 $169.99 saving $30.00
| /

"I wanted to save $15/month and upgrade from my ISP’s modem. This has helped get the speed I pay for."


  • Description
  • Tech Specs
  • ultra-fast DOCSIS 3.1 performance

    Get the speed you’re paying for. DOCSIS 3.1 supports speeds up to 10x faster with higher efficiency. Designed for fast internet plans and backwards compatible with 32x8 DOCSIS 3.0.

    true Gigabit speed

    Experience next-level gaming, streaming, and conferencing with a 1 Gbps Ethernet port for faster downloads and uninterrupted connections.

    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.

    superior, but pays for itself

    Savings up to $168 per year on modem rental fees with your internet provider. Certified for Comcast Xfinity, Cox, and Spectrum and compatible with IPv6.

    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.

  • General

    Cable Modem Service Interface

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

    Ethernet Interface

    • One open and 3 masked 10/100/1000 Ethernet LAN ports†


    • Front Panel:
      Power, Downstream, Upstream, Online, LAN
    • 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.


    • 7 7⁄8" tall x 7 1⁄4" deep x 2 1⁄4" wide
      (200 mm x 184 mm x 57 mm)


    • 18.4 ounces (523 grams)

    Power Adapter

    • DoE-compliant Level VI energy-saving, UL-listed power adapter with 12 Volt DC, 2.5 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 and 15C, FCC MPE, Bureau Veritas 60950-1 ITE safety, CableLabs®, cable service providers

    Surge Protection

    • Ruggedized cable and power lightning protection


    • Two years

    Operating Parameters

    DOCSIS Standards

    • DOCSIS 3.1, 3.0, 2.0, 1.1


    • Data Rate:
      Up to 6,000 Mbps*
    • Bonded Channels:
      Up to 32 SCQAM (DOCSIS 3.0) or 2 OFDM (DOCSIS 3.1)
    • Frequency Range:
      108 to 1002 MHz
    • Operating Level Range:
      -15 to +15 dBmV


    • Data Rate:
      Up to 800 Mbps*
    • Bonded Channels:
      Up to 8 SCQAM (DOCSIS 3.0) or 2 OFDMA (DOCSIS 3.1)
    • Frequency Range:
      5 to 85 MHz
    • Configurable Diplex Filter: 5-42 and 5-85 MHz
    • Operating Level Range:
      +65 dBmV (64 QAM, single channel)
      +57 dBmV (64QAM, 4-8 channels)
      +65 dBmV (16 QAM, single channel)
      +65 dBmV (OFDMA)

    Network Protocols


    Application Protocol

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

    DHCP Client

    • SNMP v1/v2/v3


    • Web-based management interface utility

    System Requirements

    • The cable modem must be connected to a cable modem service that uses any of the DOCSIS standards – 3.1, 3.0, 2.0, 1.1
    • The supplied power cube plugs into the most common USA power outlet.

    Package Contents

    • DOCSIS 3.1 / 3.0 Cable Modem (does not include router or phone jacks)
    • Power Adapter (UL listed)
    • Ethernet Cable (Cat 5e)
    • Quick Start Flyer

    * The actual download speed of this modem is slightly less than 1,000 Mbps when connected via a single GigE Ethernet port. The modem supports Ethernet port bonding via LAG to devices that support bonding. When connected via two bonded Ethernet ports, the actual download speed is slightly less than 2,000 Mbps. The speed may also be limited by the speed of your Internet service and other factors.

    ** This cable modem does not have a built-in wireless router and does not have telephone jacks for support of voice phone calls.

    † One open and 3 masked LAN ports allow connection of any SINGLE device with an Ethernet port including a router, Windows/Mac computer, HDTV, game station. The multiple Ethernet ports are not for connecting multiple devices; they allow connection to a router that can bond more than one Ethernet port to achieve speeds over 1 Gbps when supported by your cable service.

Customer Reviews

Based on 93 reviews
Harry W.
Motorola Gigabit Speed DOCSIS 3.1 Cable Modem | mb8600

Excellent product. No problem with the set up. Increased speed and performance is substantial.

Jake B.
Fighting Xfinity high prices

Just what the doctor ordered. Motorola MB8600 modem rocks.

Great modem

MB8600 and 8611 are great modems for xfinity. Set was super easy.

Dan G.
Easy setup, fast speeds

This was basically plug and play to replaced my old modem/router combo. Easily activated with Comcast. Paired with mesh WI-FI and haven't had any issues.

James A.M.
Now I have the speed promised

First tried using the provided Xfinity modem/router provided by Xfinity.
Download was half of what was promised. Router had limited customer functionality. Had to log into my account to shut off the pirate Xfinity wifi they create using my connection. Still only half. Forums all say it’s the Xfinity router.
I buy this one and it was super easy to set up and instantly I’m getting over my promised. I’m using a 3 year old wireless router and still over 400 MB per second.
Had the same issue when I used Xfinity before. Don’t use their equipment buy the Motorola and you’ll be happy.