DDM3513 Docsis 3.0 Cable Modem

This cable modem works great with my Comcast service in the Bay Area. I have Blast service which is advertised to provide 30 Mbps download speed, and I get OVER 30 Mbps with this modem connected to my 4 year old laptop when I performed a speedtest on the comcast website. It also showed over 6Mbps of upload speed. Keep in mind that this is the case when I connect the router DIRECTLY to the laptop with an ethernet cable. If you attach a wireless router it will most likely not give you the same results but that is due to the wireless router. I get over 20 Mbps with the linksys E3200 wireless router which I bought to complement this cable modem and I would recommend the Linksys E3200 if you are looking for a fast dual-band wireless router to pair up with this modem.As for the installation, it couldn't have been easier for me. Comcast had originally rented me this same modem for 7 months ($49 I threw away in renting) so when the new modem arrived, I simply disconnected the old uBee modem and plugged in the new uBee Docsis 3.0 Cable Modem. When I turned on my firefox internet browser it diverted me to the comcast installation page where I followed the steps (you need your account number) and within a few minutes it detected the new modem and I had internet! Simple as that, no need to call comcast in my case or look for any MAC address. Keep in mind that this is probably the case because I was renting the same exact uBee cable modem, but if you do need to call Comcast, the MAC address is easily accessible on the bottom of the cable modem.Now 3 months after I bought the modem I have saved $21 and I'm happily continuing to save with little to no issues in connectivity!

I bought this to replace the comcast modem because I kept having connection problems, and I hate that you have to pay $8 a month forever. It works great and I am happy knowing that I won't be wasting money on a rental anymore. I bought this for under $80 which means that I could have paid for it in ten months on the comcast rental schedule, and just about everywhere else, this modem goes for close to $200.Set up is ridiculously easy, you just call your internet provider and tell them you are plugging in the new modem and they set it up over the phone. it takes like 5 minutes! then you just have to take the crappy rental to the nearest comcast store, and TA DA! you are free of the overpriced rental shackles!I highly recommend this modem to anyone using Comcast/Xfinity, since I know it works for them, but the modem is great and if it works with other providers I would recommend this product over any other.

This modem works flawlessly with Comcast DOCSIS 3.0. Net speed jump from 20mbps to 60mbps. it is crazy that much can be boost from just change the modem. But anyway, the other user was right about Comcast activation. it is flawless when you are a new user with online activation. However, if you are already Comcast customer and replacing the modem. You have to call the activation line. (1-855-652-3446) They will have to remove your old modem record before you can activate the new 1. (Yeah, I know, that sound overly redundant but what can we do). So just make sure repeat couple of time to tell CS that "I bought and own this modem. It is not a rental." and make they to confirm that with you at the end of the call. And check your first month bill after your upgrade.P.S. this modem is not hot when running. I will give update after I ran it for couple of months later. I hope it will keep running for 7 years like my old motorola surfboard which serve me very very well.

I tried several cable "modems" and compared the DSL speed results using the same cable connection.At the time I was doing my experiments the cable modem I had (a Motorola) was dropping the connection several times a day.As part of the problem determination process I decided to try swapping it out with a new unit so I ordered this product.Before swapping the unit I measured the upload and download speed I was getting with my Motorola modem, the speeds were consistent with what I would expect for my cable "package" around 30M down 4M up.I connected this unit and reran the tests, the performance was horrible, closer to DSL speeds than cable.Having proved that the fault was with the cable company I was able to escalate the problem and it was determined that there was a line problem that was introducing upstream noise, this was corrected and my connection with the Motorola is solid again.This unit may work well with a perfect cable connection, but few things in life are perfect so personally I would choose a device that can tolerate some noise on the line without impacting performance.