N600 - C3700 model modem router and time warner cable dropped connections

Question

I have been having intermittent drops (for months, multiple times a day!) of both my wi-fi and ethernet connections with the N600 wifi cable modem (mcoel C3700). When I review the connection log, there are T3, T4 timeouts. All cable connections and wiring have been checked and replaced.&nbsp;I have Time Warner Cable and they installed their own modem/router side by side and it seems to work fine, no drops. They told me it must be the firmware or docsis? When I log on to netgear, it says I have the latest, most up to date firmware. I'm at a loss of how to fix this problem and wondering if it can even be fixed. It's the second modem I've bought in the past 6 months, had same issue with another one/brand and bought this one because TWC said it was better, wouldn't have issues. Huh! I've had nothing but issues. I would just like to figure out if it is an issue with the modem/router that can be fixed or if it is issue between this modem/router and time warner cable that can't be resolved and I'll be forced to rent a modem from them for the rest of my life. Extremly frustrating. Any advice would be appreciated!

DarrenM · Answer

Hello Cline&nbsp;
&nbsp;
I understand that your modem has had intermittent issues and it is getting T3 and T4 timeouts. T3 and T4 timeouts could be caused by Noise on the upstream. I understand that TWC has replaced the wiring it could be something beyond your own house wiring causing the issue which could take sometime for your ISP to fix. The couple of things that you could check is first make sure the modem is not on a cable splitter&nbsp;and the coax is going directly from the modem to the wall. The second thing i could suggest is to try is to move the modem to a different&nbsp;coax outlet in your house if possible. Hope to hear your feedback.
&nbsp;
DarrenM &nbsp;

Cline · Answer

Thanks. I don't have the option to move to another coax outlet. And I have to have it on a splitter to run the cable TV line and the internet. I also thought it was beyond my place but no one else in my building is having the same issue. To test outside lines, they installed a time warner modem/router to run side by side the netgear and the TWC one works fine so they ruled out any outside lines being the issue. It's the netgear modem/router that is the problem and is not working with TWC.&nbsp;

DarrenM · Answer

Hello Cline
&nbsp;
At this point I would contact netgear support and troubleshoot with them to see if there is a issue with the modem since you have seen other modems working just fine on the same cable connection.
&nbsp;
http://support.netgear.com/general/contact/default.aspx#tab-call
&nbsp;
&nbsp;
DarrenM

Cline · Answer

Hi Darren,&nbsp;&nbsp;So I took earlier suggestion and connected my modem/router directly to the cable (without splitter) and it works fine so far, no drops. The problem is it means I will have to connect/disconnect anytime I want to watch cable/TV and then would not have access to internet/wi-fi at same time. I'm wondering since it works with direct connection, if it's best then to buy a separate modem and router. I'm thinking that if I have to use a splitter, maybe it will work if they are separate equipment . But maybe not. Or if it's best to ask/see if TWC will run two cables in to my place - one for internet and one for cable. If have suggestion would greatly appreciate. Thanks!

DarrenM · Answer

Hello Cline
&nbsp;
If you have stable connection without the splitter then I would call TWC have a tech come out and adjust your levels or run new cables because it sounds like your levels are off a little bit. Buying a separate&nbsp;modem router will result in the same issues. &nbsp;Let me know if you have any more issues.
&nbsp;
DarrenM

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N600 - C3700 model modem router and time warner cable dropped connections

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