Question about Arris 3360 AT&T DSL Modem - -

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My at&t Motorola 3360 has every light blinking but is still working. The Power and DSL are continuously blinking red and the ethernet, internet and activity are all blinking green.

I guess it's not a "PROBLEM" yet because it still works. I unplugged it all night, pushed reset on it before turning it on and still it continues to blink away - non-stop, unusual from normal. Have had this unit for about 4mths or less, I think. It's still working. Just don't understand all this blinking.

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  • Karen Czaplicki Dec 01, 2012

    My modem is blinking unlike never usually. As I said, the POWER and DSL lights blink red and all others green, not in response to signals, activity or anything. I did just recieve something from at&t saying a hardware error has occurred and it may work awhile but is gonna go down supposively. Lucky me. I'll call the number they have here. I said I've had the unit at least 4mths. I wouldn't be asking questions about usual lighting, although I know you have ignorant people who would. This is continuous blinking of all five lights all together except two red and three green. It's not broke yet. It does not stop this behavior with reset while turned on. Thanks for trying.

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Hi,

Here's the thing...if the modem is unplugged, and you press the "Reset" button, or any button, nothing will happen because the modem is UNPLUGGED.

When you plug it in again, there is usually a few minutes or so during which time the lights will blink. Eventually, when the DSL connection is established, the blinking should decrease. But, there will always be some blinking going on to indicate that data is being transmitted.

If the "Ethernet" light is blinking, then a computer that is plugged into the router is transmitting/receiving data. If the "Wireless" light is blinking, then a computer that using a wireless connection to the router is transmitting/receiving data.

If a red light blinks, then that usually means the DSL connection has been broken. When that happens, for whatever reason, the modem will automatically begin its initialization routine and will continue to do so until connection has been established. During that time, LEAVE IT ALONE.

If you uplug the device, or if you press ANY button while the device is attempting to correct itself, you can cause permanent damage.

So, you are correct. It's not a problem. I'm sure you've heard the phrase "If it's not broken, then don't fix it." There's a lot of truth to that.

I hope this helps.
Randy

Posted on Dec 01, 2012

  • Benjamin Boeke
    Benjamin Boeke Dec 16, 2013

    That isn't her issue. I'm having the same thing. It is very abnormal to how the modem used to work. It occurred recently. ALL OF THE LIGHTS blick the same...except two are red, the rest green. They are all blinking together, the same frequency. It's very abnormal. I would like to figure this out also. AT&T told me to take it to a store and let them look at it. Again...the connection is still working...but something is not right.

  • Robert Randall
    Robert Randall Jul 04, 2014

    Our 3360 is doing the same thing. And this isn't the first time. We're on our 3rd one of these things. Our experience is that the modem will continue to work in this state for some time, but, as Karen was told, it's days are numbered. Could go out at any time. AT&T offers no solution except to buy another modem! If anyone knows any other answer, please tell me, as this is a bit ridiculous.

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are you sure your hooking the comcast modem in the right place?

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SOURCE: The power light and PC activity light are the only lights that come on. Send/Receive lights don't blink.

the most easy way to connect to the internet is get a bluetooth connetion (zippys) press the tools find device on the bluetooth on ur phone press pair device and press dial up inthe username put ur mobile number and password mobile number dial up number *99# dial

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SOURCE: Cannot set up Motorola Surfboard SB5120 modem

This usually means something is not correct with your incoming signal. If your cable wire into the modem is being run off an amplifier in the wall this could be effecting your service. If the signal is too strong the modem won't be able to communicate for internet.

You could check the incoming wire to see if it is running off an amplifier. If it is you would need to run a new line that is not on the amplifier. I would recommend comcast coming out to check the signal frequency and make the necessary adjustments.

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SOURCE: only the power and ethernet lights come on

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Posted on Dec 01, 2009

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Troubleshooting DSL Modems


Ever look at your DSL Modem and wonder what all those lights mean? Why do some flash, while others remain solid? What if your lights are different colors? How do you tell if your DSL Modem is working correctly?<br /> <br /> Each light on your DSL Modem represents a function. The light is an indication of whether that function is working properly. Sometimes the placement and title of each function can vary by modem manufacturer, but they are pretty standard in interpetation. If you look closely your modem, you might find that each function is labeled in small print to help identify them.<br /> <br /> A standard DSL Modem has a light for power, internet, ethernet, link and wireless connection. A healthy DSL Modem will have a steady green light that does not blink or flutter for all features other than internet, ethernet and wireless. A flashing or fluttering light indicates movement and useage. When you are connected to your DSL Modem wireless, the light for this feature will blink indicating a connection and/or active useage. If the internet connection is working properly the color of the light will be green. If the connection is working but experincing a problem the light can turn to yellow or orange. If the connection fails, the light on the DSL Modem can be red or absent depending on the problem causing the trouble. If your service is turned off by the provider, more than likely the light will be "off".<br /> <br /> If your lights turn a different color, are absent or your internet connection fails try power cycling your modem before reporting the trouble to your provider. Power cycling helps the DSL Modem to reset its connection and repair your internet services.<br /> <br /> If you are using a DSL Modem alone to connect to the internet (no additional router) you can power cycle it by first turning off your computer and then unplug the modem itself from the power source at the wall. Wait for 1 to 2 minutes and then plug it back into the power source and wait for the warm up to finish before rebooting the pc.<br /> <br /> The DSL Modem should go through the normal warm up procedures of blinking lights, making them all stable and solid green ect. You will know when its finished warming up when the features are set at solid green (other than eithernet, internet and wireless connection as explained above). When the modem finished the warm up, reboot your computer and check your internet connection.<br /> <br /> Power cycling your DSL Modem can help keep your connection healthy and running at optimal speeds.<br />

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