How to Choose a Cable Modem
A modem’s number of channels is equivalent to the number of lanes. More lanes mean that more traffic can be transmitted or received simultaneously. DOCSIS modesm standards can be found in 3.0 as well as 3.1. The 3.0 modems are limited to 1Gbps; 3.1 modems reach speeds up to ten-times faster at 10Gbps. The maximum speed for your modem is calculated using both the channel setup as well the DOCSIS standards.
Amazon prices and images were correct at the time this article was written. However, they may have changed over time. Verify compatibility with the service provider. Motorola modems are covered by a 2 year warranty. Support is provided by USA-based service team.
The unit was voted best cable modem 2019 by Top Ten Reviews. Wirecutter also rated it the best modem 2021. This modem is a great choice for people who need to perform at the highest Internet speeds and are able to predict future developments. It handles a 1000Mbps download speed and a 246Mbps upload speed with 24 downstream and 8 upstream DOCSIS 3.0 channels. If you are thinking of switching to the Motorola MB7621, there is additional compatibility. It can be used with a large number of Internet service providers such as Comcast Xfinity, Xfinity X1, Cox or Suddenlink. You won’t find better flexible mid-range performers than these.
Our Pick: Netgear Cm600
Netgear CM600 is a reliable 24×8 DOCSIS 3.0 cable modem that works with all the major ISPs at the time of this writing. It is compatible with the most commonly offered speed plans from Comcast Xfinity (up to 400 Mbps), Spectrum (up to 300 Mbps), Cox (Ultimate plan), Suddenlink (up to 500 Mbps), and Cable One (up to 600 Mbps), as well as with WOW’s 100 Mbps plan. Netgear CM600 manual PDF claims that the modem is compatible with Optimum. If you do have Optimum service you can call their customer support line to confirm before you purchase any modem. Owners love it too.
Amazon has a consistent positive reputation.
The DOCSIS3.0 modem CM600 features 24 downstream channels as well as eight upstream. This is plenty for most Internet plans up to 600 Mbps, and many ISPs require a 24×8 modem for their top non-gigabit plans, such as Spectrum’s 400 Mbps plan or Cox’s Internet Ultimate plan. Although DOCSIS 3.1 began rolling out, the standard is compatible with all DOCSIS3.0 modems.
Even though the CM600 enjoys strong support from major ISPs right now, you should still double-check the compatibility page of your ISP before you buy the modem. Many ISPs keep their modem-compatibility list updated regularly, so they may drop support for modems with very little notice.
Flaws and not a dealbreaker. While the CM600’s reviews are positive, Netgear only offers a one year warranty. Most modems include a two-year guarantee. Modems have a tendency to heat up. For example, the maximum operating temperatures for the CM600 are 104 degrees Fahrenheit. We think that the popularity of the CM600 and its wide ISP support outweigh the lackluster warranty.
Photo taken by Michael Hession. Another highly regarded 24×8 DOCSIS3.0 cablemodem that promises comparable performance on similar speed tiers to the CM600, the Motorola MB7621. It’s cheaper than our pick and offers a longer warranty of two years. This makes it a smart choice if the CM600 is unavailable or if you wish to avoid paying another month’s lease fee.
The downside to the MB7621’s popularity is its inability to be supported widely by ISPs. WOW, Spectrum and WOW are notable exceptions. CableLabs certifies that this MB7621 works on these networks. Although it is believed to work, official confirmation has not been made. It’s worth checking with your ISP to verify compatibility.
Can the Motorola MB7621 be used as a router?
The MB7621 is not equipped with a WiFi Router nor an adapter (also known as cable phone or digital telephone) for service. You will find a 10/100/1000 Gigabit Ethernet(GigE) port to allow high-speed connectivity of a WiFi router (or computer), HDTV or game console, as well as other Ethernet-capable devices.
Can the Motorola Mb7621 be used with Spectrum?
Motorola MB7621 has been proven reliable and supports high-speed internet for the majority of Americans. It is also compatible with nearly every plan that’s not Gigabit from all US cable internet providers, including Spectrum, Comcast Xfinity, Spectrum (formerly Time Warner Charter and Bright House).
Are You Better Off Buying Your Own Modem
You’ll be able upgrade to speeds that are available through your service provider by buying your own cablemodem. With DOCSIS 3.0 or 3.1 compatible modems, you’ll get the best performance and speeds.
Motorola Mb7621 Chipset
The Broadcom chipset powers Model MB7621 as does all Motorola Gateways.