Your cart is empty.
Your cart is empty.The NETGEAR CM400 High Speed Cable Modem provides a connection to high-speed cable Internet, up to 340Mbps. It is Cable Labs certified and with DOCSIS 3. 0 is 8X faster than 2. 0. It is compatible with U. S. cable Internet providers like Cablevision, Cox, Time Warner Cable, XFINITY & more.
Rabiya
Reviewed in Canada on January 6, 2025
Nice
Razu
Reviewed in the United States on August 26, 2024
We liked how easy it was to setup.
Zahar Alexandru
Reviewed in Germany on October 1, 2021
The device is missing the EURO-DOCSIS connection. Can be used only in USA.The customer support was kind and responsive. They refunded me in no time!
Michael J. Walker
Reviewed in the United States on June 16, 2017
Right out of the box this product would reboot itself every 1-2 minutes. Obviously your not going to have luck doing anything on the web when you are constantly dropping your connection for a reboot. After doing some research on this issue I quickly discovered that a firmware update should resolve the issue. I verified the current version and compared it to mine and sure enough I was about 6 versions out of date. This is good - it means I have a simple fix ahead of me... or so I thought because updating the firmware should be about the simplest thing you can do on any piece of hardware.I expected to find a link in the GUI (this is the interface where you access the controls/settings for the device through an internet browser) which would say something like "Check for updates". But, no such link exists. So, I thought perhaps I could simply download the required files from the support page much like you might for driver.... Nope!After doing a little digging on NETGEAR's site I found that in order to update the firmware I had to reach out to the ISP (Internet Service Provider), who in my case is Spectrum (formerly Time Warner Cable). They were very quick to tell me that they can't update the firmware because it's not their device - I purchased it myself, I'm not leasing it from them. So, I reached out to NETGEAR who told me that they can't help me. They reiterated what I previously read on their site that it must be done by the ISP. I tried the Spectrum again hoping the last person that I spoke with there maybe just didn't know what they were doing... and I was told the same thing again. So I called NETGEAR back to find out what can be done. They insisted that they cannot support their own equipment and I needed to get support from the ISP. I started getting seriously frustrated at this point. I asked the rep at NETGEAR "how could you make a product and then not only take away the users ability to maintain their own equipment especially when it comes to firmware updates which are often critical to network security, but you the manufacturer wont support it? How can you rely solely on third-party ISP's all over the globe to maintain your equipment for you?" Instead of responding, he hung up on me. Just like that. I never swore and I never raised my voice. I guess he just didn't have an answer and didn't value me as a customer.Long story short - I'll never buy another NETGEAR product again! And I don't recommend you do either!
Kawaii kassy
Reviewed in the United States on August 8, 2016
Greate ,Cheap , easy to set up , and works perfect !Perfect modem if you use Internet on your ps4 or phone and want a stonger connection for multiple devices . Has 3 total wires in the box it comes in. I baught this not realizing it didnt come with built in wifi connection, i still needed to hook up to a wifi modem, it still was perfect since I had a wifi mode already. It was good deal i couldn't pass up ! It connected cox internet service perfectly - Has normal modem issues that you normally expect once in a blue moon , always a common thing when dealing with technology , you can restart the box and the connection will be fixed. 2 months now and still going strong .Update: still runs perfectly one year later !!Hope this helped anyone !
Pattullo
Reviewed in the United States on December 22, 2015
I bought this modem 3 weeks ago, and since then I haven't had no issues whatsoever, I got the same speed as the modem that Time Warner Cable had gave me , no complaints yet. I got 103 Mbps on the download, and almost 10 Mbps upload which I don't care about to much. Works great, set it up its pretty easy , just call your cable company to register the ESN and that's it . If after that you don't have Internet service call Netgear they will help set it up as well.
David
Reviewed in the United States on October 21, 2015
I typically buy products based on reviews and ratings on Amazon. This Modem had quite a high number of reviews and rankings (when I purchased it was at 4.5 stars!) however the reviews have gone down over time. It started out fine, easy to install and ready to go in minutes. Over time however it has started dropping internet connections. It loses connection and will sit idly for a few minutes before it decides to pickup again, or until I manually reset it.When it works, it works great. When it drops connection a few times in an hour, it drives me nuts. It usually works ok, but at night it seems to struggle.
Hell Bound
Reviewed in the United States on December 20, 2014
Time Warner charges a monthly fee for provided modems but allows customers to purchase their own modem as long as it's on their approved modem list. I purchased this Netgear Modem to lower the cost of my monthly Time Warner internet charges. It will take about 13 months for it to pay for itself. I'm sure it will last much longer than that since I have always had luck with Netgear products. It was very easy to install. I just took the cables off Time Warner's modem and attached them to the new modem. The initial boot-up of the modem took about 5 minutes to complete but the manual said it could take up to 15 minutes. After the initial boot-up I had to call Time Warner to activate it. That process took me about 10 minutes on the phone with a Time Warner tech. The manual lists all the supported cable ISP's along with websites and 800 numbers so you can easily contact your ISP for activation. The manual also includes suggested dialog to use when talking with the tech to make things easier. Comcast customers can activate their modems via Comcast's website. I did a speed test after the activation and everything was as expected.Pros:Nice Design, Matches the rest of my Netgear equipment.Easy to setup.Clear instruction manual.Lowered my monthly internet bill.Can login to the router for configuration, logs, and statuses (Could not with my TW Modem).Cons:None so far.
Recommended Products
