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Linksys Support

Broadband Etherfast® Cable Modem (BEFCMU10)

• Built-in 10/1000 ethernet port and USB connection
• CableLabs Certified DOCSIS 2.0 and 1.1
• High-speed ADSL Modem gives you a fast, "Always On" connection to the Internet

Support Sections

FAQs are frequently asked product questions. Select Downloads for user guides and firmware updates.

  • Overview
  • FAQs
  • Frequently asked questions

    Frequently Asked Questions for various Operating Systems

  • Forums
  • Forums

    • BEFCMU10 ver.3 power adapter

      Busting it back out and getting back to using cable modem instead of DSL. problem is, I have no idea which of the power...

    • BEFCMU10 goes off line then back on

      I have a BEFCMU10 v1 that has been misbehaving recently. It will go off line losing contact with the router and the Internet....

    • How to determine version number of BEFCMU10

      I'm looking to buy a modem off ebay and the guy can't find the version #. Seeing how I've never seen a BEFCMU10, I assumed...

    • Linksys CM100

      I recently got a new Linksys CM100 cable modem. Is it advisable to have the cable modem standing or does it need to lie...

    • Changing router channel

      Hi running8 and welcome to the forums! Please click the link for instructions: Setting-Up the Wireless Settings...

    • Linksys Hardware Vs the ISP

      I'm having lots of Problems with my cable internet service charter tech that came over saw my stack of Linksys gear...

    • BEFCMU10

      I have a BEFCMU10 version 2.0 cable modem. My provider Insight Broadband has recently boosted their internet speeds. But...

    • Can't connect to, but OK on every other site...WRT54Gv6

      Faulty COMCAST DNS server.... COMCAST got it fixed!!! I could not get an intelligent tech support person to escalate NOAA’s...

    • BEFCMU10 versus CM100

      Hello everyone! Which cable modem is better; the Linksys BEFCMU10 Cable Modem or the Linksys CM100 Cable Modem? Than...

    • WAG320N Static Route

      Again: the WAG320N does not support this kind of setup. It does not allow you to define directly delivered static routes...

    • E4200 Static IP Issues

      Haha! Oh man! Late nights just aren't good. I realized my error in the morning. I had previous used the Advanced Routing...

    • IP address? DHCP?

      The AM200 is router with integrated modem. That's the main problem. I would recommend only to use a single router.Two recommended...

    • Cannot renew ip address

      Un-install the adapter software/linksys monitor and install only the drivers... Remove the Linksys Adapter and un-install...

    • Adding new computer to existing network

      You have to be on the same workgroup.You have to turn on Network Discovery and file sharing in your new computer.

  • Downloads
  • Downloads

    Please ensure you select the correct hardware version as not all downloads are compatible with your device.

    Where's my model number?

    License Agreement

    How to find your model or serial number

  • Videos
  • Live Chat
  • Live Chat

    Live Chat Not Available
    Please use our forums
    and Knowledgebase,
    and check back later
    for Live Chat availability


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Live Chat

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