Motorola SB6180 DOCSIS 3.0 Cable Modem in Non-Retail Packaging (Brown Box)

I used to pay TimeWarnerCable for more than two years for using their modem. But finally, I decided enough is enough. I bought a used piece of this item and it is working just great. Although this exact model is not listed under the compatible modems of TimeWarner, but I did not have any problem registering it, I just called them and gave them the MAC address and it was registered successfully.I have the standard package with TimeWarner, the download speed was 15 MB before. They have upgraded their services recently and now my subscription supports up to 50 MB download rate. This modem is compatible with the new speed and I get actually around 50 MB of download bandwidth.I would like also to mention that I had hard time to have it running the first time. I had a problem when I tried to connect it to my wireless router. It was working fine when it is connected directly to my laptop via the wire. However, the router did not recognize the modem at first or the other way around. I kept power cycling until it worked at last.Overall, this modem completely fulfills its purpose and it supports high download speeds. I would recommend.

Right out of the box, I ran into nonstop issues with this modem. Some online research (outside of Amazon) confirms that I am by far not the only person to experience this.The modem will work fine for a period of time, initially a couple of hours. After that, the speed will drop to almost zero on the upload and download. Packet loss becomes a problem, too (20-30% loss), but this does not even come close to accounting for the overall drop in speed. One test (I had to run it several times before it would even complete) showed that the modem was downloading at 0.15 Mbps!Unplugging the modem and plugging it back in solved the problem for a short time, but the modem would almost immediately run into the same problem unless it remained unplugged for several hours. After leaving it unplugged overnight, I again got an hour or two of reliable speed out of it. After that, the same thing happened, again and again.I returned this product to the seller for a refund, and got a Netgear modem. I have had no issues with it.

I came to the conclusion that it was time to retire my old Motorola DOCSIS 2.0 cable modem. The main reason being that my internet speeds didn't stay constant, especially while streaming video. The other reason is that my ISP (Midcontinent) informed me that they were phasing out DOCSIS 2.0 modems and that they recommend I upgrade to DOCSIS 3.0.After a little research I came to the conclusion that the Motorola SB6180 was the right cable modem for me. The reasons being that it's one of the cheapest DOCSIS 3.0 cable modems you can buy, and that Motorola has been making modems since the dawn of the internet. After setting it up I quickly realized I made a wise decision to upgrade.THE POSITIVES:- Very reasonably priced... One of the cheapest DOCSIS 3.0 cable modems out there.- Internet speed stays consistent, even with multiple devices connected to your network.- Smaller and more discreet than some of the past models.- Runs colder to the touch than some previous models.THE NEGATIVES:- It's hard to find a new one... most likely you'll have to purchase a used or refurbished one.CONCLUSION:The positives easily outweigh the negatives. So if you're in need of a good DOCSIS 3.0 cable modem than this is a good choice.One thing to remember... Make sure you look on your ISP's website or call them before purchasing to make sure they support the Motorola SB6180. I've heard of some companies being really fussy about which ones they support and which ones they don't.

I ordered this modem to use on Comcast (near San Francisco) since it's specifically sold as a compatible modem, however the Comcast XFinity page only mentions the SB6120, SB6121, SB6141 and SB6183 and not the SB6180.I followed user reviewer Tamer's instructions: connected the modem directly to the computer, accessed IP address 192.168.100.1 to access the modem's page, clicked the "Configuration" tab and clicked the "Reset Factory Defaults" button (this is explained here: http://arris.force.com/consumers/articles/General_FAQs/SB6180-Factory-Reset)I then called Comcast and asked them to provision my new modem, identifying it as an SB6141 as suggested by Tamer. Worked like a charm.Recommended -- it works with Comcast in the San Fransisco South Bay.Thanks again to user Tamer for his review and all the helpful people who left comments there.