Is this modem guaranteed to work with Comcast? i.e. It is not a banned modem from the Comcast network? Thanks! Edit: to be more specifc, I am referring to this specific modem for sale. I know that some resold modems (MAC address) are banned forever from the Comcast network because of illegal activity and can never be re-activated on Comcast. Thanks all for the responses. Also, I don't mind that it's older. I just have the basic Internet package which this modem is more than capable of handling. Thanks! Is this modem guaranteed to work with Comcast? i.e. It is not a banned modem from the Comcast network? Thanks! Edit: to be more specifc, I am referring to this specific modem for sale.... » Read More Is this modem guaranteed to work with Comcast? i.e. It is not a banned modem from the Comcast network? Thanks! Edit: to be more specifc, I am referring to this specific modem for sale. I know that some resold modems (MAC address) are banned forever from the Comcast network because of illegal activity and can never be re-activated on Comcast. Thanks all for the responses. Also, I don't mind that it's older. I just have the basic Internet package which this modem is more than capable of handling. Thanks! « Show Less
1101724
Modem just arrived today and tried to connect with Comcast. They said they do not connect model numbers DPC2100.
1101725
yes, but b/c it's an older model it doesn't work right anymore. get the motorola surfboard. i got it and it's awesome.
1101726
The one I purchased did work but it only lasted for possibly a year.I ended up going back to paying the monthly and getting one from Comcast. Since then even the one from Comcast I had to replace.I hope this helps.
1101727
this is exactally the same modem that comcast uses. For the price, i bought 2 of them. Replace the comcast modem and start your pc, the net will re-set you new modem.
1101728
This is not DOCSIS 3. Comcast says it will work, but only for a period of weeks or months. I have to send it back based on this...
1101729
I can't speak to any but the Scientific Atlanta that I have. As to being "guaranteed" to work on Comcast, I can't say, but the modem it replaced was a Scientific Atlanta of the same type and this modem replaced it and works perfectly. I had no problem with Comcast in switching from one of theirs to one of my own.
1101730
Mine works just fine. Call them with the mac address and see. It's the same one that I had from Comcast. There are new and faster ones now.
1101731
I use Time-Warner as my isp. I called them before I made the purchase and asked them to be sure I could use the one that I was looking at. Once I got ok from them, I purchased and had T-W set it up on their end. I would suggest that you give your ISP a call before spending any money on a modem.
1769938
I purchased this modem used. It did not have a battery so I swapped another modem's battery to test it's capability. My intention was to use it to replace my comcast telephony modem. I could not get it to connect with Comcast even with Comcast technical help. I took the battery out and sent it back to the seller. If you're planning to use this system with Comcast you should first verity that this is one of Comcast's approved DOCIS 3 modems.
152419
Hey Sean, this does work with Comcast but this is not a modem/router combo. It's just a router so you'd still need your original modem in place. Hope this helps.
941305
Sorry for the late reply. This modem will not get you wifi (only a wired Ethernet connection to your computer). You will need to buy a separate router for this. You can buy a combination cable modem and wifi. There are several on the approved Comcast list. I elected to have two separate units. First, if I leave comcast, I can still use my router. Second, I purchased a router with other capabilities including a print server, network storage, cloud capabilities and a DNLA server (media server). Basically, I wanted to build a home network. There are several good routers out there depending what you want. Sorry for the late reply. This modem will not get you wifi (only a wired Ethernet connection to your computer). You will need to buy a separate router for this. You can buy a combination cable modem and wifi. There are several on the approved Comcast list. I elected to have two separate units. First, if I leave comcast, I can still use my router. Second, I purchased a router with other capabilities including a print server, network storage, cloud capabilities and a DNLA server (media server). Basically, I wanted to build a home network. There are several good routers out there depending... » Read More Sorry for the late reply. This modem will not get you wifi (only a wired Ethernet connection to your computer). You will need to buy a separate router for this. You can buy a combination cable modem and wifi. There are several on the approved Comcast list. I elected to have two separate units. First, if I leave comcast, I can still use my router. Second, I purchased a router with other capabilities including a print server, network storage, cloud capabilities and a DNLA server (media server). Basically, I wanted to build a home network. There are several good routers out there depending what you want. « Show Less
1982273
This modem should be supported with Comcast, but you should always ask your ISP to verify. It is listed on Comcast's list as certified for us, though "End of Life". This means it will work with their lower tiered plans, but they will encourage you to upgrade to a DOCSIS 3.0 device as a means of generating revenue. The modem is capable of 43/10 Mbps (Down / Up) and is a DOCSIS 2.0 modem.
1271266
Yes it works with Comcast. The Comcast modem output that would normally go to your computer will get plugged into the wireless router. The router can now either be the source of wireless internet or you can connect an Ethernet cable(s) to the output of the router and connect that to your computer. That way you have both wired and wireless for your devices.
1172203
I have the same services from Comcast and was able to switch to (a used) tm822G which came with a new back up battery. It took me a while to get a well trained support person to undo the previous mistakes of an offshore person who royally screwed up just about everything they could. Once the phone and internet services where switched to the new modem properly I was able to use my own modem but it took several months and two trips to the local Comcast office to correct the billing. Initially I was told by a high level (I think they call them second tier) tech support that Comcast would not be able to switch me to my own modem because they would have to reflash its firmware and once they did, they would own it. So you might hear a lot of official-sounding statements to discourage you from switching to your own modem but going by my experience, it takes a bit of persistence but it's doable.
1487308
Yes it does work with Xfinity comcast. That was the reason I purchased it, and it works better than the modem that I was renting from Comcast. I don't get the interference or "Clicking" on my phone line like I did with the modem provided by comcast. I run everything through this Arris modem, like my Netflix, Roku, Apple TV, Computers, Lap tops and Tablets. I hope this answers your questions.
1654085
Depends on what service you have. The type of modem is different for DSL vs. Cable vs. Gateway (a modem that allows for phone service). Also, some modems work with some providers and not others: Verizon vs. Comcast vs. Other. Once you answer the first issue, you can narrow down a host of good modems (except for Gateways--there aren't too many good ones of those out there). Then you can compare the modem with the provider's compatibility lists.What service provider do you have and what kind of modem type do you need?
2258888
This works fine with Comcast. You may need modem. Not all modems are compatible with Comcast.
1465814
http://customer.comcast.com/help-and-support/internet/comcast-supported-routers-gateways-adapters/ This is the link for compatible routers and this link to check if your device is compatible with it.http://customer.comcast.com/help-and-support/internet/list-of-approved-cable-modems/. I do not have Comcast, but up to now this Netgear was the best I had and it is compatible with all the routers I tested, in my house and in friends house. So I assume that if the router is compatible, this device will only amplify the router itself and the signal from Comcast if the router is compatible wit it. This device must be compatible with the router. http://customer.comcast.com/help-and-support/internet/comcast-supported-routers-gateways-adapters/ This is the link for compatible routers and this link to check if your device is compatible with it.http://customer.comcast.com/help-and-support/internet/list-of-approved-cable-modems/. I do not have Comcast, but up to now this Netgear was the best I had and it is compatible with all the routers I tested, in my house and in friends house. So I assume that if the router is compatible, this device will only amplify the router itself and the signal from Comcast if the router... » Read More http://customer.comcast.com/help-and-support/internet/comcast-supported-routers-gateways-adapters/ This is the link for compatible routers and this link to check if your device is compatible with it.http://customer.comcast.com/help-and-support/internet/list-of-approved-cable-modems/. I do not have Comcast, but up to now this Netgear was the best I had and it is compatible with all the routers I tested, in my house and in friends house. So I assume that if the router is compatible, this device will only amplify the router itself and the signal from Comcast if the router is compatible wit it. This device must be compatible with the router. « Show Less
1394982
I've had this modem for a long time and I have Comcast/Xfinity. However, I just looked at the approved device list on the Comcast website (http://mydeviceinfo.comcast.net/) and the SB5120 is no longer listed.
857248
Yes it works with any cable modem from comcast. the router has an ethernet port which looks like the phone jack, but has twice the amount of wires and is bigger in size. The cable that normally comes from the cable modem and goes into your computer, is instead plugged into the router, so that it can ROUTE all the traffic from various computers and the internet back and forth to each other. However, I would NOT recommend the model I bought because of the issue with the DHCP server built into it, at least not until such a time as a firmware update corrects it. The N700 and N750 have no such issues.
1705730
I am TWC customer, though the device is the same as the one they have in their inventory, for some odd reason it doesn't support thier VOIP. I just happened to go to their customer service in my city and brought up the question again. She told me to keep my device for my network and ask them for a free modem for your phone. I don't know if the same applies to Comcast.I hope this will help. Happy New Year.
2134362
Since you're using your own modem. There would be no fee from the cable company to rent one. The modem works just fine on Comcasts network. The cable company will probably try to talk you into getting a newer modem for reasons they don't understand themselves. Don't buy into their BS
937261
Ugh, I was afraid it was something like that. Either technical, or just SPRINT disallowing it so people don't abuse it and use it as their main modem. *sigh* Yes, for the price you would DEFINITELY think it would work. I haven't had any more luck, and I pretty much gave up.
597358
I'm dealing with this now. I called Comcast, gave them the MAC and serial numbers, and they said this modem is not compatible. Their list of compatible cable modems at http://mydeviceinfo.comcast.net shows the NetGear CG3000DCR and CG3000Dv2. So now I am trying to upgrade this CG3000D to CG3000Dv2, but it does not look good. Waiting for NetGear tech support chat as I write... I might need to return this cable modem, and order one on the list. More later...NetGear's answer: No. See http://kb.netgear.com/app/answers/detail/a_id/24324DO NOT BUY IF YOU ARE A COMCAST CUSTOMER.