RAM | 64 MB |
---|---|
Wireless Type | 802.11bgn |
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100% positive over last 12 months
100% positive over last 12 months
NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS)
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Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
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Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Brand | NETGEAR |
Internet service provider | spectrum, optimum, cox, xfinity |
Connectivity Technology | Wireless |
Total Ethernet Ports | 1 |
Color | Black |
About this item
- ELIMINATE MONTHLY CABLE MODEM RENTAL FEES - Up to $156 per year
- DOCSIS 3. 0 Cable Modem with 1 Gigabit Ethernet port. One (1) Gigabit Ethernet port with auto-sensing technology
- Up to 340Mbps download and upload speed. Separate router required for WiFi. 8x4 channel bonding.
- DOCSIS 3. 0 unleashes 8x faster download speeds than DOCSIS 2. 0
- Ideal for streaming HD videos, faster downloads, and high-speed online gaming
- Required for the fastest cable Internet speed tiers
- Compatible with Xfinity from Comcast, Spectrum, Cox, & more. Not compatible with bundled voice services.
- Memory storage capacity: 64.0 MB
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PRODUCT CERTIFICATION (1)
Pre-owned Certified: Electronics products are inspected, cleaned and (if applicable) repaired to excellent functional standards. Buying Pre-owned extends a product's life, reducing e-waste and raw material extraction.
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This Item NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS) | Recommendations | dummy | dummy | dummy | dummy | |
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
Price | $64.99$64.99 | $99.99$99.99 | $39.95$39.95 | -29% $162.86$162.86 List: $229.99 | -5% $179.99$179.99 Typical: $189.99 | -10% $197.97$197.97 List: $219.99 |
Delivery | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 |
Customer Ratings | ||||||
Easy to install | 4.0 | 4.4 | 4.2 | 4.2 | 4.4 | 4.2 |
WiFi signal | 3.5 | 3.8 | 3.5 | 3.8 | 4.1 | 3.7 |
Tech Support | 3.1 | 3.1 | 2.9 | 3.4 | 3.7 | 3.2 |
Value for money | 2.0 | 4.3 | 4.1 | 3.8 | — | 3.8 |
Sold By | NDR Solutions | Hitron Americas | Techa Distribution | Amazon.com | Rustic Wholesale | Verdi! |
connectivity tech | Wireless | Ethernet | Ethernet | Ethernet | Ethernet, Wi-Fi | Ethernet |
ethernet ports | 1 | 2 | 1 | 1 | 2 | 2 |
number of ports | 3 | 3 | — | 1 | — | 2 |
data transfer rate | 340 megabits per second | 1 gigabits per second | — | 1000 megabits per second | 300 megabits per second | 2500 megabits per second |
max downstream rate | 343 megabits per second | 1 gigabits per second | 960 megabits per second | 1029 megabits per second | 1 gigabits per second | 2500 megabits per second |
max upstream rate | 123 megabits per second | — | 960 megabits per second | 246 megabits per second | — | 2.5 gigabits per second |
modem type | cable | data modem | cable | cable | dsl | cable |
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CM1000 Ultra High-Speed DOCSIS 3.1 Gigabit Cable Modem | NETGEAR
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Product information
Technical Details
Brand | NETGEAR |
---|---|
Item model number | CM400-100NAS |
Operating System | Microsoft Windows 7, 8, Vista, XP, 2000, Mac OS, or other operating systems running a TCP/IP network |
Item Weight | 1.08 pounds |
Product Dimensions | 8.55 x 7.17 x 2.05 inches |
Item Dimensions LxWxH | 8.55 x 7.17 x 2.05 inches |
Color | Black |
Flash Memory Size | 8 |
Power Source | AC |
Manufacturer | Netgear |
ASIN | B00MN2EUEA |
Is Discontinued By Manufacturer | No |
Date First Available | August 11, 2014 |
Additional Information
Customer Reviews |
4.1 out of 5 stars |
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Best Sellers Rank | #27,169 in Computers & Accessories (See Top 100 in Computers & Accessories) #122 in Computer Networking Modems |
Warranty & Support
Feedback
Product guides and documents
Product Description
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.
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the performance, ease of setup, and value of the networking router. For example, they mention it works well, is easy to connect to a separate wireless router, and is great for the money. That said, some complain about the connectivity and heating issues. Opinions are mixed on speed and quality.
AI-generated from the text of customer reviews
Customers like the performance of the router. They mention that it works well, does the job admirably, and has a full signal. Some say that the initial performance was pretty good, and the router has done the job for six months now.
"Greate ,Cheap , easy to set up , and works perfect !..." Read more
"this modem is really my new favorite. works extremely well, no lag, no internet connection problems like my previous arris which was not good...." Read more
"...The main reason was heating. These modems gets very warm and needs to run 24/7 there should be cooling units to make them last." Read more
"...Works great, set it up its pretty easy , just call your cable company to register the ESN and that's it ...." Read more
Customers find the setup process of the router to be easy. They mention that the instructions are clear, and the product is simple to use. Some say that the connections are a no-brainer, and that it can connect to a separate wireless router if desired. Overall, most are satisfied with the ease of setup and use of the product.
"...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..." Read more
"...was really easy to set up and had all the information on how to install to my charter account...." Read more
"...Works great, set it up its pretty easy , just call your cable company to register the ESN and that's it ...." Read more
"...however the reviews have gone down over time. It started out fine, easy to install and ready to go in minutes...." Read more
Customers generally like the value of the networking router. They mention it works great, is relatively cheap, and has saved them serious cash. Some say that it has lowered their monthly internet bill.
"Greate ,Cheap , easy to set up , and works perfect !..." Read more
"...Easy to setup.Clear instruction manual.Lowered my monthly internet bill...." Read more
"...searching I found my self purchasing this product because of it's affordable price and the fact that it has a wireless router built in...." Read more
"The DOCSIS 3.0 high speed cable moden by Netgear was worth every cent...." Read more
Customers like the signal strength of the router. They say it's fantastic, great, and easy to install, operate, and understand. Customers also say it works great for 25 Gig internet from Comcast, works with Xfinity 100MBs service, and is perfect for cable downloading to give wireless access throughout the house.
"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..." Read more
"...based on condition my modem came in and the fact that it works for Comcast Xfinity internet." Read more
"...but only one computer could be on line at a time, and then it kept dropping the signal...." Read more
"In terms of internet quality the device is great...." Read more
Customers are mixed about the speed of the router. Some mention that it is great and allows them to stream Netflix and play online, while others say that it's too slow and unable to provide the high speed internet that they are paying for. Some customers also mention that 50% of the connection speed disappeared by the time it got to the Netgear router 3 inches away, and that the WiFi started slowing down.
"My Unite lasted me for about 3 years before it started slowing down my internet speed. The main reason was heating...." Read more
"this modem is really my new favorite. works extremely well, no lag, no internet connection problems like my previous arris which was not good...." Read more
"...chipset has a known issue for causing "buffer bloat", which can result in high latency...." Read more
"...It started out fine, easy to install and ready to go in minutes. Over time however it has started dropping internet connections...." Read more
Customers are mixed about the quality of the router. Some mention it's very reliable, has a strong signal, and has gotten better over their last modem. However, others say that it started failing after a few months, and that it frequently crashes and needs a full factory reset.
"...It usually works ok, but at night it seems to struggle." Read more
"...that lasted one month beyond it's warranty date... This one only lasted one month, so I'm replacing it with another of the same...." Read more
"...60;(' The CM400 is a very reliable and sound unit. Bought April 2017, over a year of quality service." Read more
"...powering up everything was great - shortly thereafter everything was no longer great...." Read more
Customers are dissatisfied with the connectivity of the router. They mention that it has a tendency to drop their internet connection, and that it constantly disconnects all devices from WiFi. Some customers also report that the modem frequently refuses to connect to the web at all. Overall, customers are disappointed with the product's connectivity.
"...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..." Read more
"...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..." Read more
"...Our wifi signal was kind of weak but we were still able to use it." Read more
"...out of the box set up easy but within 24 hours started constant cycling to find connection...." Read more
Customers are dissatisfied with the heating of the router. Some say that it runs hot and can't maintain internet connectivity. Some customers also mention that the modem gets much warmer than any internet device should.
"...The main reason was heating. These modems gets very warm and needs to run 24/7 there should be cooling units to make them last." Read more
"...EDIT: Strongly suspect this one is prone to overheating. It’s very small and not particularly well ventilated, and felt very warm constantly...." Read more
"...However, it does run rather hot at times, and down here in Texas that can be rather detrimental to the operation of the device...." Read more
"...Haven't checked into this too much, but it seems like this Modem generates less heat than my old one did as well. A great value!" Read more
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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 !
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!
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.
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.
Top reviews from other countries
The customer support was kind and responsive. They refunded me in no time!