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NETGEAR CM400 Cable Modem Review – Features, Performance, Good, Bad, Worth the Price?

January 3, 2023 by Damien D. Brown Leave a Comment

The Netgear CM400 is a cable modem from Comcast. Considering the high demand for internet in the times we live in, efficient and reliable sources of internet are in high demand.

netgear cm400
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Comcast created this Netgear CM400 modem among its series of modems and so far it is still ranking first on all Comcast modems. This price among other great features has made the Netgear modem CM400 quite famous among internet users.

Let’s find out how good it really is in this Netgear CM400 review.

Review Contents

  • Basic Features
  • Performance
  • What is Good About it?
  • What is Bad About it?
  • What is my Opinion?
  • Frequently Asked Questions (FAQs)
    • How fast is Netgear CM400?
    • Is Netgear CM400 compatible with Xfinity?
    • How do I access Netgear CM400?
    • Do I need a modem and a router?
    • Is Netgear an internet provider?
    • Why was DOCSIS developed?
    • Is Netgear CM400 compatible with Spectrum?
        • NETGEAR Cable Modem CM400

Basic Features

  • Dimensions: 5.8 x 3.8 x 1.8″ / 147.3 x 96.5 x 45.7 mm
  • Weight: 0.44 lb / 0.20 kg
  • Speeds up to 340 Mbps
  • Operating Temperature: 32 to 104°F / 0 to 40°C
  • 1 x Gigabit Ethernet LAN Port
  • 1 x WAN Cable/Coaxial Connection
  • Meets DOCSIS 3.0 Specifications
  • Gigabit Ethernet with Auto-Sensing
  • 8×4 Channel Bonding
  • 8MB Flash and 64MB RAM
  • CD-less Installation
  • Windows and Mac Compatible
  • Requires Cable Broadband Internet
NETGEAR CM400

Performance

The Netgear cable modem CM400 has the DOCSIS 3.0 technology which is up to 8 times faster than the previous version, the 2.0. This means you get faster connections and faster streaming. This cable modem does not require any monthly payments. Once you purchase it you own it completely. This is very pocket-friendly for all the users. The CM400 1AZNAS has an 8×4 channel bonding which makes your internet experience the best possible. You can access 8 downstream channels and 4 upstream ones.

NETGEAR Cable Modem CM400 -...
NETGEAR Cable Modem CM400 -...
(7245)
$6.99
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It has a massive GB Ethernet port which ensures that you have high-speed internet that allows you to have good streaming even if everyone else is using the same internet source. Learn more about this product here. This Netgear CM400 Xfinity can connect automatically to Xfinity. It is also compatible with most cable service providers. This means you can get the maximum from your online streaming.

It can work with any Wi-Fi router of your choice. All you have to do is connect the router through the port on the modem and you can access whatever speed you have paid for. The CM400 Netgear cable modem is very easy to set up. You just have to connect it to the coax cable then connect your computer to this modem and use it to activate the modem.

It has a high download speed and the internet connection is very strong. This means that you can download full HD videos very fast and without interference. The Netgear CM400 modem is very power efficient. It runs at a very cool temperature unlike many other modems out there. This means that it will serve you for a longer period of time.

This netgear cable modem cm400 does not have a power on and off button. To switch it off you have to unplug it from the electricity source and to switch it on you plug it back in. This is not good for your electricity bill.   The CM400-100NAS has a narrow compact size that allows you to save up on space. This is because you can easily tuck it away behind other electronics or in between other appliances.

It has a very effective firewall which safeguards your internet connection against any unauthorized users. This helps to protect your privacy and prevent snooping. This CM400 100NAS comes with a one-year hardware warranty and a 90 days technical support warranty. This means that if you ever experience issues within this period you can access immediate free service from the manufacturer.

It is not bulky and therefore it is convenient to move it from one place of your house to another. It is very lightweight and therefore easily portable. The package comes with an easy to understand guide that gives directions on how to install your modem and the steps to get it up and running.

What is Good About it?

  1. It is affordable.
  2. It is easy to use.
  3. It is fast.
  4. It does not require monthly payments.
  5. It is easy to carry.
  6. It covers a wide range.
  7. It is easy to set up.
  8. It is power efficient.

What is Bad About it?

  1. It has limited configuration options.
  2. It does not have an on/off button
  3. It disconnects sometimes
  4. Customer care does not always respond.

What is my Opinion?

In this netgear cm400 review, we have come to know everything about this modem. The Netgear CM400 cable modem is a great appliance for home internet. It gives good quality internet and it is also quite reliable. It is fast and rarely requires rebooting. Know more about this product here.

NETGEAR Cable Modem CM400 -...
7,245 Reviews
NETGEAR Cable Modem CM400 -...
  • COMPATIBLE WITH ALL MAJOR...
  • SAVE MONTHLY RENTAL FEES:...
  • BUILT FOR SPEED: Best for...
  • WORKS WITH ANY WiFi...
  • ETHERNET CONNECTIONS: 1...
  • MODEM TECHNOLOGY:...
$6.99
Buy on Amazon Price incl. tax, excl. shipping

Last update on 2023-01-31 / Affiliate links / Images from Amazon Product Advertising API

It is obviously not perfect; no product is, but the CM400 modem gives you exactly what it has promised. Adding the fact that it is very affordable, this CM400-1AZNAS becomes even more appealing to internet users. I would definitely recommend buying the Netgear CM400 100NAS to anyone looking for a good and reliable internet service provider.

Frequently Asked Questions (FAQs)

How fast is Netgear CM400?

The Netgear CM400 is a powerful modem, providing access to high-speed cable internet of upto 340 Mbps upload and download speed – great for streaming videos, large downloads, and high-speed gaming. It is CableLabs certified for US cable internet services, and features DOCSIS 3.0 which is 8x faster than its predecessor, DOCSIS 2.0. it supports all major cable internet providers such as Xfinity by Comcast, Spectrum, Cox, Cablevision, and more. It supports the newer IPv6 standard as well. All these features make the Netgear CM400 a fast and reliable modem.

Is Netgear CM400 compatible with Xfinity?

The Netgear CM400 is CableLabs certified for US cable internet services, and works with all major cable internet providers including Xfinity by Comcast, and other providers such as Spectrum, Cox, Cablevision, and more using a coaxial cable. It features the DOCSIS 3.0 standard, which is rated to be 8x faster than the previous DOCSIS 2.0 protocol.

How do I access Netgear CM400?

Steps to access and login to the Netgear CM400:
a. Launch any modern web browser from
i. a computer that is attached over an Ethernet cable to the cable modem or
ii. from a computer that is connected to a WiFi router that is attached over an
Ethernet cable to the cable modem.
b. Type http://192.168.100.1. A login page displays.
c. Enter the cable modem user name and password. The user name is admin. The
default password is password to display the BASIC homepage. The user name and
password are case-sensitive.

Do I need a modem and a router?

The modem is meant for connecting to the Internet using an Internet Service Provider (ISP), while a router is used to communicate with devices that is connected to its (local wireless) network. The main difference between a modem and a router is the modem provides an internet signal. In contrast, the router broadcasts a Wi-Fi signal to allow your devices to communicate wirelessly with the modem (and with each other). A modem is needed to communicate with devices outside of your network via the internet.

Is Netgear an internet provider?

No, Netgear is not an Internet (Service) Provider, or an ISP. Netgear is a service provider of hardware devices that is used to connect to the internet using the services of an external ISP. In other words, Netgear manufactures devices such as modems and routers that allow you to connect to the internet, but Netgear does not supply the internet connection itself.

Why was DOCSIS developed?

Data Over Cable Service Interface Specifications (abbreviated as DOCSIS) is a globally-recognized telecommunications standard that enables high-bandwidth data transfer via existing coaxial cable systems that were originally used in the transmission of cable television program signals (CATVS). With the rise of the high-speed fiber-optic Internet, cable networks began gradually losing their ground. But this competitive threat, however strong, did not bring demise to the well-founded yet significantly older technology. It was the DOCSIS standard that turned out to be the stepping stone which coaxial cable technology needed to stay in the game and enable an ever-faster Internet access while avoiding the Herculean (and extremely costly) task of replacing the whole physical network infrastructure.

Is Netgear CM400 compatible with Spectrum?

The Netgear CM400 is CableLabs certified for US cable internet services, and works with all major cable internet providers including Spectrum, and other providers such as Xfinity by Comcast, Cox, Cablevision, and more using a coaxial cable. It features the DOCSIS 3.0 standard, which is rated to be 8x faster than the previous DOCSIS 2.0 protocol.

NETGEAR Cable Modem CM400

The Netgear CM400 is a cable modem from Comcast. Considering the high demand for internet in the times we live in, efficient and reliable sources of internet are in high demand.

Product Brand: Netgear

Product Currency: USD

Product Price: 13.48

Product In-Stock: InStock

Editor's Rating:
4.3

Filed Under: Modems & Routers, Electronics Tagged With: Cable, CM400, Modem, NETGEAR, Router

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