Cisco Cable Modem DPC3008, Compatible with Xfinity/Comcast, Spectrum, ATT, TWC, Cox, and Most Internet Providers, DOCSIS 3.0 Modem

I would have given this modem 5 stars except for one little issue which I'll get to later. For the most part, it is a wonderful modem. I bought it to replace the rental modem from TWC that dropped my internet connection several times a day. In the time that I've had this Cisco modem, my internet hasn't dropped. And even though I have only Standard internet, my connection speed seems to be a little faster, though that is admittedly subjective.I'm also pleased with the company because they throw in a little brochure on how to overcome your cable company's resistance to letting you use your own modem.But despite the kudos, I'm going to ding them for one little detail. I purchased this modem as a "new" product for the "new product" price. But upon inspection, it is obviously a refurbished product. One minor problem is that the connections are loose with use. If I jostle the modem, the connections are intermittent and the power connector even falls out of the back of the modem as the spring tension in the connector hole is totally gone. Another detail is that, according to the Cisco page for this modem, it should have come with a CD manual. Instead, the company put a sticker on the box saying that their online manual is more up-to-date than the CD. That may be true, but it's still a giveaway that they're selling a refurbished product as new.Anyway, I'll keep it because it's a huge improvement over TWC's crap rental modem. But I'm probably going to replace it with a NEW new modem eventually...

I wished to be free from Comcast's modem rental, and decided to spend some time to investigate options for a modem + wif-router combo that would be both reliable and cheap. Ideally I would want it to pay itself off within the least amount of time while giving me all the features my Comcast modem did.I was running the rolls-royce of Comcast modems, the DPC3941T, a 24x4 Docsis 3.0 with 802.11ac. It was a bit of an overkill for the Performance Internet plan I was on. I had this device mainly for its 802.11ac functionality, something the other modems Comcast were renting did not have. As a modem it provided 29.99Mbps downlink and 6Mbps uplink.I found similar combo units by  Surfboard SBG6782-AC  and  Netgear C6300 , with 802.11ac, too expensive -- around $200. I started thinking about the possibility of failures, and at that price point I decided it would be a waste of money if the device did fail. Also, If I wanted to move away from Comcast (if I could) the cable modem interface may be obsolete for a new service. So I decided it would be wise to buy a separate modem and router (two separate devices), and if one failed or became redundant it wouldn't be as big of an issue.I looked at a few reviews and decided on this  Cisco DPC3008  modem (not the  Linksys DPC3008-CC  variant) due to Cisco's reputable name and it's 3-star rating on Comcast's supported devices (I believe both Linksys and Cisco devices are the same -- but since Linksys's acquisition by Belkin in 2003 from Cisco, completed in 2013, things may have changed). I also liked its compact build quality and larger vents compared with the  SurfBoard SB6141  and  Netgear CM400-100NAS  standalone modems I was considering at the same time.I paid heed to the overheating warnings by other customers on Amazon, but looked closely at the build of the device to see it has a larger set of vents on the its top and screw mounts, hinting that a vertical placement had been designed for and recommended. I have since installed it in this way on my wall, and the heat generated is less to the touch than the rental I had. I have also had no dropouts in connection.Many other people said that you need to call Comcast to get it activated. I, like many people, do not like calling Comcast, and so tried the www.xfinity.com/activate link via a web browser when everything was connected and it worked like a charm. Upon installing I am getting 29.99 Mbps downlink and 6Mbps uplink, the same as my rented DPC3941T.I also purchased my Cisco DPC3008 modem USED for $34.40 with Amazon Prime two-day shipping from seller Deal Time Plus. So I am very happy this is working so well for a previously used item. The hardware revision is V1.00 and it was manufactured in Oct-2013. For a two year old device it is operating with no problem.I paired this modem with a  Buffalo WHR-1166D  to get the 802.11ac connection I required, which I bought from Amazon for $45 with free one-day shipping. It is a solid 802.11ac wireless router with backward compatibility. It has a great simple configuration splash page, as well as an advanced option for people concerned with QoS, Port-forwarding etc.Overall I was able to replace my rental unit with a near-good-enough replacement with 802.11ac at a price point of $79.40. Much cheaper than anything else out there currently with the features I required. Driven by the Cisco DPC3008, I am pleased with the performance I am getting and there is no noticeable difference to what I was getting through Comcast's rented DPC3941T.Also, the customer picture by Daniel Greynolds is an example on how not to mount this modem (sorry Daniel). If you look closely, he has the face on the top, and this will explain why he has had to reset on occasion (due to overheating, possibly). There are no vents near the face of the modem, and the heat will not be able to escape. See my picture on how to properly mount this modem.Tip when connecting this modem to your router: Some people have mentioned that the 'Internet' signal isn't being passed, or are having difficulty getting it synced, to their wireless router. Once you have your modem connected to your provider, make sure that the modem is connected to your router's 'WAN' ethernet port. If the router is not picking up the signal, simply reset the modem. That is power the devices like this 1) router, once on and stable, then the 2) modem. This should make the connection between both devices come up quicker, or solve the sync problem.

Good modem so far I have noticed no difference in it though from my old motorola surfboard modem. I purchased this modem due to having sudden packet loss in my network after having comcast come out to check the signal and what not, They said it was the modem but as usual it wasnt so i made sure i bought a cheap refurbished one just in case and thank god I did b/c the refurb works perfect and only cost me 30$. As far as the packet loss well that still remains but that isnt the modems fault: wireshark and various other networking programs i've been running have pinpointed the loss in packets between the router and the curb and when i unplug the router it still occurs so its on the curb end of it... See how it goes after comcast reruns the wire :DAs for the heat issues people were talking about I made a fan for the side of it. Works perfect! Basically so I can lay it on its side without worrying i run alot of traffic so we'll see how it does. I havent seen any interference from the fan at all if anyone is wondering as far as connection goes its exactly the same with a fan i zip tied to the side of it. Basically just login to the modem to check things for interference. You can buy a fan for it also, a usb or any other pc fan if you know a bit about wiring. Or you can always use google.

I decided not to rent a modem from Comcast anymore so I bought this. It will pay for itself in less than 8 months. I hooked it up, called tech support and they registered it with the MAC address and serial number. While this causes you to lose access to the setup menus for the cable modem (they lock it down) it was faster than my previous modem which was a DPC-3000. It gave me a couple more mbps.It was faster after being hooked up for a couple of days actually.Decent product, however, I wish it was a bit cheaper and I wish that Comcast didn't lock it down so that all I can do is "look" at signal strength and that's about it (and view the name of the firmware that Comcast downloaded onto it and flashed it with). But this has nothing to do with the product.Great product overall! A bit pricey but worth it!