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Cable Modem Troubleshooting: Ambit U10C018

Cable Modems

Light patterns, images, manuals and more helpful info for the Ambit U10C018 cable modem –

Manufacturer: Ambit

Model: U10C018

click to enlarge and animate u10c018 cable modem
click to enlarge (and animate)
Modem Light Indicators
Power Off - modem is not receiving power
On - modem power is activated and receiving power
USB Off - no USB connection is present
Flashing - cable modem is transferring data over the USB cable
On - indicates that the cable modem is properly connected to the computer’s USB port
Ethernet Off - the Ethernet port is not in use
Flashing - cable modem is transferring data over the Ethernet cable
On - indicates that the cable modem is properly connected to the computer’s Ethernet port
Send Flashing - the cable modem is sending data to the internet
Receive Flashing - The cable modem is receiving data from the internet

During initialization, LED flashes slowly to indicate that the cable modem is searching for a downstream channel.

Sync On - the cable modem has established a downstream channel
Ready Off (POWER and SYNC are lit) - modem is disabled for service
Flashing Slowly - modem is gathering upstream parameters
Flashing Quickly - modem is downloading the configuration file
On - modem aqcuired
Notes and Useful Information

Installation Manual, .pdf (1.01MB)
Manufacturer Website
Manufacturer Product Page
Manufacturer Support Page

Posted in Cable Modems.

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16 Responses

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  1. trojanspirit2 says

    Great guide, thanks for posting it!

  2. Rick Beardslee says

    How do I get a password from the modem supplier?

  3. Walt Powis, Sr. says

    Hi Rick,
    The address to the Ambit Model #U10C018 is http://192.168.100.1 and the default User Name and Password is user. Let me know when you get this email.
    Walt

  4. Roger Kramer says

    Hello Walt
    I have a small problem. I have bought my wife a new Dell Lap top PC and I do not know what the Ambit Cable Modem Model # Uioc018 passphrase or Secutity Key is. I have typed in the defalt “USER” but it still does not except it. I am also running my main unit from it by way of a cable and also my wifes older E Machine Lap top is wireless. Where do I go from hear?

    Thanks for your support
    Roger Kramer
    kf6vwn@roadrunner.com

  5. Walt Powis, Sr. says

    Hi Roger,
    I seem to remember that one of the other “user name” defaults is “root” without the ” “. Try the “user” and “root” in all the combinations and see if it will open it.
    Walt

  6. Stacy says

    Try the following.
    Username: Admin
    Password: cableroot

  7. Rob M. says

    Stacy’s Username & PW worked on mine but it’s no different than using the default user Userna,e & PW cept that you can restore the unit to Factory Default. Is there a way to actually make changes to the firmware, as in a Linksys Router?

  8. Ross McKillop says

    Rob -

    Correct, re: user/pass. No, you cannot (typically – not always) modify the firmware. Those are changes that are pushed by your cable company to the modem. Rarely will they push down a new firmware unless there’s a change that benefits them, or they’re rolling out a new service that requires an updated firmware.

  9. Carlos Salas says

    entras por la puerta de inlace que es 192.168.100.1

    el usuario: user
    Contraseña: user

  10. brent says


    Try the following.
    Username: Admin
    Password: cableroot

    thank you, this worked for me

  11. imajuggalo says

    my ethernet conects no problem but when i goto hook up my laptop or my other pc to usb i get limited or no conection ive tried ipconfig but am getting nowhere or is it i can run the ethernet and usb at the same time

  12. Nina says

    Hello,
    Would I be able to connect to this modem wirelessly?? I guess I question is :What do I need to get/do in order to connect to the internet with my wireless notebook?

  13. George E. Gill says

    I get message that I do have driver for my Ambit USB cable modem U10CO18. Where can I find this, my sysytm id not eorking properly without it.

    Thanks and best regards,

    George E.Gill

  14. imajuggalo says

    hey george not sure this wht u need but it works 4 me i did find tho get the ambit router run properly then run it to a router wrks np after tht hope this helps
    http://www.adrive.com/public/30b805189276537a19641c361b96c1aef4612c858558ef2463573dd45d59a769.html

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