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NETGEAR CMD31T-100NAS High Speed Cable Modem - DOCSIS 3.0 Ethernet Port

Ships from China. Most customers receive within 4-18 days.

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  • Compatible with Time Warner, Comcast, Charter, Cablevision, and others
  • Up to 150 Mbps download and upload speed
  • Docsis 3.0
  • Gigabit Ethernet port
  • Support IPv6
  • CD-less installation

LOADING... LOADING...
  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews


Learn more about the Netgear Inc. CMD31T-100NAS

Model

|
Brand
NETGEAR
Model
CMD31T-100NAS

Details

|
Type
Cable Modem
Interface
Ethernet Port
Cable Interface
One (1) LAN Gigabit Ethernet port
One (1) WAN Female F connector
Standards
DOCSIS 3.0

Features

|
Features
For high-speed cable Internet access

Works with major cable ISPs

Save money-no monthly equipment charges

Designed to meet DOCSIS 3.0 specifications and backward compatible with DOCSIS 2.0 networks

IPv6 Next Generation Internet addressing support

Gigabit Ethernet port with auto-sensing technology

System Requirements:
Cable Broadband Internet service
Microsoft Windows 7, Vista, XP, 2000, Mac OS, or other operating systems running a TCP/IP network
Microsoft Internet Explorer 5.0, Firefox 2.0, Safari 1.4, or Google Chrome 11.0 browsers or higher

CD-less installation.

Packaging

|
Package Contents
High Speed Cable Modem - DOCSIS 3.0 (CMD31T)
Stand
Ethernet cable
Power adapter, localized to country of sale
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
Eggxpert Review

Eggxpert Review

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1/ 5
Run Away!

Pros: I liked the fact that the power adapter came off on the side so it didn't block any other plugs on my surge protector. It also had a nice stand and didn't take up much space on the top of my rack. Other than that, I can't say many good things about it, which is a shame.

Cons: Although I was able to hook it up to my Comcast service very easily, that's about the extent of my positive experience. Comcast makes it pretty easy to swap out modems. Connect the modem, wait a few minutes, open a browser window and you're prompted for your Comcast account number and some other information. Punch that in, grab a drink and by the time you come back your modem is ready to go.

Once connected things seemed pretty good for awhile. Then I started having to reboot it constantly, sometimes once or twice a day. I ran into issues on XBL where connection speeds would drop to a crawl and ping time was over 1000ms. Try gaming like that one day.

A reset of the modem would resolve the issue for awhile, but it would always occur again. I ended up messing with it for a few days and finally gave up and threw it back in the box. Plugged in my trusty Motorola and viola, no issues at all.

Other Thoughts: Unfortunately, I can't recommend this device to anyone. If you scroll through the reviews, you'll see that I'm not the only one that had issues with their connection.

Move along, nothing to see here.... :)

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Eggxpert Review

Eggxpert Review

Through the Newegg EggXpert Review Program, Newegg invites its best reviewers, known as EggXperts, to post opinions about new and pre-release products to help their fellow customers make informed buying decisions.Click here for more details.

2/ 5
Doesn't work with Cox Premier Svc

Pros: DOCSIS 3.0. Gigabit Ethernet port. Supports speeds up to 150 Mbps.

Cons: Unfortunately, I was never able to get this modem working on the Cox network. I am not sure if it is a faulty modem, or if it is no longer compatible with the recent changes Cox has made to their network to accommodate the new speed standards, especially with the roll out of their GigaBlast service in the Phoenix area (where I live).

Other Thoughts: When I plug the coax cable into the modem, it never comes ready, and the ISP (Cox) can not see it. It is not possible to provision and register the modem. There was some confusion at Cox as to whether this modem is on their approved list, with some lists showing it and others not showing it. In any case, this is an older modem that Netgear tells me is being phased out. I upgraded to a CM600 which is working great. See my review for more details if you are interested.
Bottom line is that this modem is being phased out by Netgear so you will probably not see it in the stores anyway. Stick the the CM600 which is future proof right up to Gigabit speeds.

For those interested, this is what was contained in the error log:
Time Not Established Error (4) ToD request sent- No Response received;CM-MAC=28:c6:8e:31:4b:...
Time Not Established Warning (5) MDD message timeout;CM-MAC=28:c6:8e:31:4b:80;CMTS-MAC=6c:41:6...
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:c6:8e:31...
Mon Mar 21 08:17:09 2016 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...
Time Not Established Warning (5) MDD message timeout;CM-MAC=28:c6:8e:31:4b:80;CMTS-MAC=6c:41:6...
Tue Mar 22 16:10:49 2016 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...
Time Not Established Warning (5) MDD message timeout;CM-MAC=28:c6:8e:31:4b:80;CMTS-MAC=6c:41:6...
Tue Mar 22 16:32:42 2016 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...
Tue Mar 22 16:32:46 2016 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=28:...
Time Not Established Warning (5) MDD message timeout;CM-MAC=28:c6:8e:31:4b:80;CMTS-MAC=6c:41:6...
Tue Apr 5 09:02:49 2016 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...

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Ownership: more than 1 year
1/ 5
Do NOT buy this product

Pros: Easy to set up.

Cons: Everything else.

Other Thoughts: I bought this modem along with an ASUS router to replace the leased equipment. Never before have I hated a network device as much as Netgear modem. I have to reboot this modem at least twice a week (usually more) and it constantly drops connection to Comcast.

Called Comcast support about this issue and they basically told me to buy a new modem. I have read numerous horror stories about this modem from other people online having the same issues.

Funny enough, I saw this same modem I paid $90 for brand new for $3 at a thrift store the other day. Shows how horrible this product is. Do yourself a favor and buy a Motorola modem.

Did you find this review helpful?
Ownership: 1 week to 1 month
Eggxpert Review

Eggxpert Review

Through the Newegg EggXpert Review Program, Newegg invites its best reviewers, known as EggXperts, to post opinions about new and pre-release products to help their fellow customers make informed buying decisions.Click here for more details.

5/ 5
Working Cable Modem

Pros: -DOCSIS 3.0
-Compatible with Comcast, Time Warner, Charter, Cox, Cablevision, and more.

Easy installation. Unhooked my old modem, hooked this one up, waited 15 minutes, called my internet provider and gave them the model # and MAC address. 15 minutes later I had internet access. Speeds were on par with the speeds of the modem I replaced. (NOTE: I'm currently on one of the slower/cheaper internet plans.)

Cons: None.

Other Thoughts: There's not a whole lot to say about this device. It's a DOCSIS 3.0 cable modem which means you should get all the benefit of DOCSIS 3.0 without having to pay your provider their monthly rental fee. I note there are a number of comments about devices dying. I had no problems in the short time I used this. If you're looking for a modern DOCSIS 3.0 modem I see no reason not to consider this. Just keep in mind it's a modem only, most of you will still need/want a wireless router to plug into this - though you likely already have a separate modem and router.

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Ownership: 1 week to 1 month
Verified Owner
1/ 5
Netgear CMD31T stopped working after 6 months

Pros: When working, my speeds with Cox internet increased.

Cons: Had minor issues with having to reset the modem every other week or so. Then it was every couple of days to every day. Now, the modem won't even power on.

Other Thoughts: I sent an email to newegg@netgear.com to request a RMA. If they don't assist, I will not buy another Netgear product. Other Netgear products do work well, but this modem is not good quality from what I can tell so far.

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Ownership: 1 month to 1 year
1/ 5
Buyer beware!

Pros: Easy to hook up and one phone call to the ISP had it online. Immediately ran a speed test and got 33.33M down and 3.5M up. Better speeds than the gear the ISP provided and no more rental fees, YAY!

Cons: I have an old Netgear router that is several years old and it still works great, figured this would too. I was wrong. It died quite suddenly after just 6 months (so much for saving me money on those rental fees). To all who purchase, keep your receipt on this one.

Other Thoughts: I gave a thought to contacting the manufacturer about this but I read quite a few reviews about Netgear and their service and warranty policies on this site and figured I'd just take the loss as it stands rather than let them rob me of more money and my time as well. I just tossed it and replaced it with another popular name brand and now I'm not BOARD, I'm SURFing. I'll never buy Netgear again.

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Ownership: more than 1 year
Verified Owner
5/ 5
Updated Review - One Year

Pros: Still working.

Cons: None

Other Thoughts: Seems to be a mixed bag from the reviews on here, but my experience has been good. It's paid for itself by now, having saved me the TWC modem rental fees over the past year.

I can't be sure what all the other reported problems are, but I do know that TWC only specs this modem for the low bandwidth side of their offerings, and I'm running at just their basic entry level.

It's glitched up maybe 3-4 times over the past year, but it's never required anything more that a power cycle or two to reset itself properly.

Overall, a solid purchase for my usage case.

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Ownership: more than 1 year
1/ 5
No to Netgear MODEM

Pros: It is fast when it is connected to Comcast

Cons: I have to reboot this almost once a week to re-connect to the Internet, very painful when you have young kids trying to get on the Internet or streaming movies. I will be my last Netgear product. Going back to the brand I have used in the past.

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