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

Worked great right out of the box. It looks like a brand new modem and appears to work the same. For those curious about setup with my internet provider: I didn't even need the serial number or MAC address to activate on Comcast XFINITY in the SF Bay Area. I signed up for service online, plugged the modem in to the cable connection and powered it on, plugged the modem's output into a computer, and everything worked brilliantly right away. Our home was already pre-wired for service, so I didn't even need to speak to anyone at Comcast, which is always a plus. Very happy with this amazing value. It's happy providing service to a Google Wifi router and we're seeing as-advertised speeds and haven't had the slightest hiccup.

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 : )

Very very disappointed. Our family cable modem had died and we anticipated the arrival of this new modem after a hard two no-internet days. After having endured those two days, I was disappointed when the modem couldn't get any signal when setup and had to wait for a technician which was yet another day without internet. When the technician showed up, after multiple tries and fixes, he claimed the modem was defective. I witnessed the technician's test modem working at my house today so I'm sure this is not any of our problems. Anyways, will be looking to buy a cable modem that actually works this time. Strongly do not recommend this product to anyone.

just modem, no wireless router function

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.

It works on Time Warner. Setup was a little weird and took several tries. It only lets me connect to the web interface to get status if it is not connected to the cable. Once it syncs with the cable, I can't connect to the private web interface. It seems to go into a blind pass-through mode after it is connected to the cable, and does not function as a NAT firewall after that. It required several reboots and frustrated attempts to configure. It would not work with my Linksys wi-fi router, but I think there was something wrong with that router. I got a new Belkin wi-fi router and it works okay. It still took several attempts to get it to configure, but now it seems stable and everything is fast. It is pretty good for the price, and how much it will save me on device rental from the cable company.

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

This modem is good and has been working well for two months now. I didn't realize it's a cable modem so I hooked up a router to it, but it hasn't given me any problems so far. It's also much smaller than I expected. Definitely the tiniest modem I've ever seen, but it doesn't compromise the performance. This product also came with a 30 day warranty which was a nice touch!

Don't work, impossible to connect with my cable distributor.