Question about RCA DCM315R Modem

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1st Light keeps blinking

The first light (internet) keeps blinking continueously and I am unable to connect to the internet, any tips/help would be appreciated.

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Re: 1st Light keeps blinking

A tv splitter is a cheap one-way device, it does not support return data,
no answer from the modem no connection
google for a digitap splitter

Posted on Jul 06, 2008

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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.


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.

Dec 01, 2012 | Arris 3360 AT&T DSL Modem - -

1 Answer

Unable to connect to the internet. one of the light is blinking on the modem, i think it's the 3rd one from the top.

Is it the Data Light? If it's the Data Light it's actually normal for it to blink since it's getting the user data to the modem. However, you might want to recheck the connections, if the cables are connected correctly to the correct port. If all else fails, you might want to contact your Internet Service Provider where you got this modem from since the modem might be faulty.

You can check the manual for this modem here:

Hope this helps.

Apr 06, 2011 | Toshiba DOCSIS Cable PCX2500...

2 Answers

I have had problems connecting to internet all weekend (internet - red light), am on now but internet and ethernet green light keep blinking, is this ok.

No because dsl light should be solid green light. You need to contact your ISP to check if there is a problem on the network.

Jul 11, 2010 | Modems

2 Answers

Only internet light is blinking

According to the user guide, the modem is trying to connect to the isp. If it is continually blinking, check all your cables. Once you are satisfied all cables are properly connect contact the isp to find out if there is an outage in your area and if not they can help you.


1 Answer

Constantly blinking Activity light

Well, you are very correct with the activity light blinking and the increased blinking except the fact that modem will encounter a problem in future...
The 5 different lights on your modem namely Power, Ethernet, DSL, Internet and Activity have their own indications and explanations.
1. The Activity Light indicates the amount of activity that is takin place on the computer on the Internet though the activity might blink even when you are not browsing. This can be explained by stating that the computer constantly keep sending signals  about it being connected to the internet and any other acknowledgements..

So, you've got nothing worry about unless the Power or the Ethernet or the DSL or the Internet light Blinks....
Cause they are the resultants of a fried modem(check for the adapter), faulty LAN connections, interrupted Dsl line and the account verification failure indications respectively.....

Dec 18, 2008 | Siemens SpeedStream Modem (4100) (SS4100)

1 Answer

My internet light "connection keeps going on and off

if your internet light on the modem is blinking or flashing, then you do not need to worry. the Ethernet light and the internnet light on the modem will always blink, but the dsl and the power lights shud not blink...

for more tips and information click here

Dec 01, 2008 | Westell Wirespeed LiteLine 6100...

1 Answer

Flashing dsl light

The DSL light flashing on the modem is natural for it means the device is synchronizing. But if the DSL light continues to flash, you have to wait a while before connecting, it shouldn't take more than a minute. If it does, you may need to contact your service provider because that is uncommon whether there is active Internet connection or none.

Sep 17, 2008 | 2wire (1000-000057-000) Modem

4 Answers

My ethernet light is blinking

Make sure you have internet. The ethernet light is blinking because what ever u have plugged into it is talking to the modem. The modem will then take that request and ask for it on the DSL/internet line. Make sure the DSL light is steady on and the internet light is on or flashing with activity.

Oct 10, 2007 | Westell Wirespeed LiteLine 6100...

1 Answer

Broadband 2nd Light keeps blinking yellow and then a solid red Light

Ask your Paents to ring the company they connect with it seems to be emulating a disconnection for some reason?

Sep 05, 2007 | 2wire (1000-000057-000) Modem

2 Answers

Blinking 2nd light - Broadband connection light

Its disconnected ring the ISP or your Parents?

Sep 04, 2007 | 2wire (1000-000057-000) Modem

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