NETGEAR Renewed CMD31T-100NAR (4x4) Cable Modem - Cox, Cablevision

A little concern at first with a Refurbished unit but the reviews seems promising and it was cheap enough to risk it. It replaced my leased modem from Time Warner (Upstate NY) and is working just as well so far. Had to call in to activate but took less than 10 minutes. I had my own wireless router (Linksys) and it worked w/o issues. This CMD31T has 1 port (for your router) and one needs to remember that each time a device (router or laptop) is connected you will need to reboot the CMD31T, because it seem to latch onto the MAC address of the last connected device. At least this is what I had to do when I had initially configured it with my laptop, and then switched over to my router. Its been 2 weeks now, if it goes 4 more weeks, it would have paid for itself. I will update again if anything happens, but for now, I'm completely satisfied.

I bought this "guaranteed reconditioned" Netgear CMD31T Modem to replace an identical one I had that stopped working. When I called Netgear's technical assist line about the original modem, I was told by the tech that my warranty was expired but he could fix my modem ( I assume by downloading new firmware) if I bought an extended one-year warranty for $138. That was more that the original cost of the modem so I opted instead to buy the reconditioned one. After installing it with the help of my ISP telephone tech assist, we could not get the new one to work. Since it was guaranteed to work, the ISP tech wrote a trouble call and a tech came to my house to try to get it to work. After more than an hour of futile effort, he gave up. I again called Netgear's tech assist only to be informed that a reconditioned modem is not supported by phone tech assist; you have to email your problem to an on-line tech assist center. Only one problem - without a working modem, I have no internet. Without internet, I have no email. I finally sent the useless piece of **** back and got a refund. At least that worked.

Works well. As expected, I had to call Time Warner to have it activated, but it was no problem to do so. I used rubbing alcohol to uncover the serial number (per another reviewer's suggestion) in case I needed it, but they didn't ask for it - only the model number and whether it's docsis 2 or 3 (it's 3.0). I really like the clear indicator lights on the front.I did receive a faulty ethernet cable with it, but as I didn't want to return the entire unit and re-order it, the seller offered a partial refund to cover the cost of a new cable. Faulty cables of all kinds seem to be far more common now; I recently purchased a new external DVD player with a faulty USB cable, for example. I don't fault the seller for a general decline in quality control among manufacturers of inexpensive cables : )

I bought this Modem for $49.99 refurbished to replace the rental modem from TWC. the rental cost me $10.00 monthly, that being said it will pay for itself in savings very quickly. the modem is very sleek and slim in comparison to the previous unit (rental Unit) . the installation process was almost seamless, i unplugged the old one and connected the new one. there wasn't much to do after, just call TWC for the activation.the tech asked three questions. 1. what is the mac address 2. is it mac or CD mac 3. try to load up a web page, are you able to surf the internet now. it all took about 20 minutes. ultimately the modem boosted my speeds up a bit from where i was; i am getting a bit more download and upload speed and the internet seems much stable. the only thing that was disappointing was it didn't come with the little stands/brackets shown in the picture which is the reason for the 4 stars. overall i recommend this modem as a replacement for your rental unit. what i highly recommend is owning your modem rather than paying that silly rental fee.good luck

I just personally hate the internet companies this product is probably just as good as an expensive one but the internet is controlled by comcast and spectrum regardless of your router they choose how well you receive internet dont be fooled

Worked well with Comcast xfinity. I did have to call up the tech hotline and give them the MAC address for this replacement modem. I did have some difficulty with adding in a wifi router after I got this modem up and running. The added in wifi router seemed to be continually rejected by Comcast. When I dropped back to using just this modem connected directly to my computer it worked fine but not when I coupled in the router. I stumbled by chance on a work-a-round. My router had an option where I could patch it in to my computer, go into the admin menu and have the router emulate my computer's MAC address. Then upon patching it back to the modem, Comcast accepted it right away and it's been fine ever since.

Hi, I hooked mine up to Comcast. Had the Router Registered with Comcast. I could get a 192.x on the inside and Comcast was able to ping my Modem. I am running a Cisco ASA with Wireless HP Access Points and could never get out of the Modem.After having the modem up and running, Comcast could see my device but I could not see outside (ping 8.8.8.8 would not work). Is there something on the Modem that needs to be done. The MAC Address was "covered up" with a magic marker on the modem tag physically stuck to the device.