NETGEAR Cable Modem CM500 - Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 400Mbps | DOCSIS 3.0

I purchased this to replace an aging Motorola/Arris SB6141 after I moved to the Comcast Xfinity Gigabit Internet tier. After setting it up and a quick call to Comcast/Xfinity to have it added to my account and an activation signal sent, I was good to go. Works as intended and I am getting the max download/upload speeds advertised so I couldn't be happier, not to mention no rental fee. Word of caution if you are an existing Comcast/Xfinity customer replacing your modem, don't bother with the instructions that mention to visit xfinity.com/activate to activate your equipment, it will most likely fail at the end right out of the box. To save yourself time and aggravation, do the following: 1. Remove your old modem from the coaxial and attach the new CM1000 modem. 2. Power it on and wait for the first 4 LED lights to go solid green (there are 5, but you won't see the fifth until you attach it to a NIC or home router) 3. Attach the included Cat 5E cable to the back and plug it into a laptop or nearby PC 4. Call 1-800-934-6489, go through the prompts until it connects you to the Comcast/Xfinity activation support agent. 5. Say you would like to replace the modem on your account, answer the account verification questions, and have your modem MAC address handy. 6. Provide the MAC address and wait for them to add it to your account and send the activation signal. They may ask you which version of the CM1000 you have, in which case answer the 1AZNAS. Once they confirm and send the activation signal, you will see the modem recycle itself a couple times before settling back on four solid green LED lights. 7. The support agent should have you test the connectivity after that and if all went well, you should be up and running. 8. (If you have a home router) Turn the router off/unplug it, and attach the Cat 5E/6 cable from the cable modem. Power cycle the cable modem one more time and wait for it to come fully back online with the four solid green lights. Turn on/plug the router power back in and let it fully come online as well. At this point, you will see the 5th green LED light on the modem indicating NIC connectivity and you should be good to go. NOTE: Once they properly send the correct bootfile/configuration to your modem the first time, any subsequent activations/provisioning (for instance if you move or swap modems then swap back) seem to work fine off of xfinity.com/activate. It is that out of the box initial configuration that fails with the automated setup.

I bought this product to pair up with a new Router as I'm upgrading so that I can start connecting up smart lights security cameras music etc so far working perfectly

I bought this cable modem after some study and evaluation of popular cable modems for sale. I decided to buy it because I don't like the preset configuration of the Spectrum cable modem that comes with the Spectrum subscription. I prefer one that is not pre-configured and I'm glad I bought my own cable modem now that I have it. I went to the Spectrum website to find pre-approved modem models that are compatible with Spectrum equipment (you can do this with any cable company). I found that there are a lot of modems that are compatible, and I selected one based on the speed of my account and the price. I run about 300 MB/s speed, so I selected the Netgear Cable Modem model CM700 because it's rated for at least 400 MB/s and the price was very reasonable when compared to the competition. I was pleased with the CM700 right out of the box. It's much smaller than most other cable modems, and like most, it's mindlessly easy to hook up. It has a power plug that goes to a 110 volt AC outlet, a cable plug that goes to the cable outlet on the wall, and an ethernet plug that can plug into a PC, or a router/wireless router, or even into a network switch (gigabit switch). Once I took the CM700 out of the box, I looked at the quick-start guide, and I had the CM700 set up and running in less than a minute. I tested it, and it gives great speed too. The CM700 plugs into my wireless router (the uplink plug). It feeds the wireless router and a PC that is wired directly to one of the wireless router ethernet output plugs. The wireless speed I get from this set up is excellent, and the direct-connect speeds I get exceed my expectations. Look at the pictures, and you'll see from the quick-start guide how easy the CM700 sets up. The only criticism I have of the CM700 is that it seems to run warm, but then again, it has no malfunctions whatsoever. Also, I'm guessing that it has a great internal heat-sink, and I see that it has lots of holes for air ventilation, so that keeps it within the operating temperature range. Overall, I rate the CM700 a 5 star unit, based on both performance and price.

So I've had this modem for a few weeks. I used to have a Motorola Surfboard 6141 I believe (going off memory). That modem at times would randomly drop speeds down to 1mb/s maximum for no reason, then throttle back up. I tried to research this and found out it might have been related to the Time Warner Maxx internet package I have (I'm grandfathered into a package that currently doesn't exist). No idea how or why that would matter but it seems to be the reason why my old Surfboard was having problems. So a deal hit and I dropped cash for this modem in hopes I could solve this problem fairly cheaply and so far its working. I haven't noticed any lag, no strange behavior like dropping to 1mb/s speeds, its been consistent and constant fast speeds, even above the stated speeds I should receive. The unit is well ventilated so the concern of heating up is not an issue. It's barely warm to the touch. I think as others have stated, if you put this in a confined space, for example an entertainment center with a glass door, then it'll heat up more than likely because there's no internal fan. But if you provide adequate air circulation then it'll function perfectly from my point of view. Also I wasn't able to successfully hook up the unit and remotely update to Time Warner that I am switching modems (Mac address) so I had to call them. The tech was able to get me going and took about 10 mins. All in all its so far a great intermediate modem.

I bought this modem to replace the tm822g from comcast. My setup had the tm822g and an asus rt-ac66u, however, due to an issue with comcast I wont go into, I was being charged a rental fee for a modem that I had purchased. All of the other modems that were compatible with comcast did not offer the emta for voice so I was faced with either buying a modem and paying for a triple play that had voice i couldn't utilize. or pay 250 dollars for an arris that had emta but was based off the highly controversial intel puma6 chipset which has been documented as having flaws and being unstable. On top of that, all the devices that had emta were all in one gateway devices that provided routing and wireless which I did not want. I wanted a lean modem that literally only did modem and voice things. After some arguing with comcast they told me the cm500v was coming out in approximately 1 week and it would be what I am looking for. The CM500V has 16 downstream channels compared to the 8 channels on the tm822g. I do not notice any difference in top speed with this new modem as the bursts seem to cap at around 240mbps. It does seem though that when the modem is under load it seems to handle it better having more downstream channels to spread the bandwidth over. This modem does future proof a little as it would be adequate if comcast decides to up the speed to 686mbps at some point. Although, if that were to happen I would need to replace the AC66U because the CTF hardware acceleration on packet switching from the wan tops out around 300mbps. That all aside, I had no problem installing the modem. I plugged it in and it booted up and I was directed to the comcast walled garden. I put in my account information and it rebooted and was working within minutes. I did not have to call comcast. Once the modem was working I plugged it into my router and then I lost wan connectivity. Once I rebooted the router and the modem everything was up and running again. Since I was plugged directly into the modem from my laptop when it first booted up it got an IP address based on the MAC address of my laptop. That was why i lost connectivity when i plugged it into the router. Once I rebooted them both the modem pulled a new ip address and everything was good. The modem has been rock solid since with no issues on the phone or voice side. If you want a modem that is literally only an internet and voice modem that doesn't do any routing (because you have your own routing hardware) and doesn't have wifi (again because you have a router or an AP for that) than this modem is adequate and fits into a nice price point. It also is based off a broadcom chipset and is not susceptible to the issues people are reporting on devices that have been based off the faulty intel puma 6 chipset like the arris 6190. There has supposedly been promised a firmware update to fix the 6190 but it has yet to be seen. The arris 6183 is not affected by this issue in fact, the 6183 uses the same broadcom chipset the cm500v does. The key difference is that the cm500v has voice and the 6183 does not. The 6183 is one of the most popular retail modems and this devices is every bit its equal despite its slightly higher pricepoint, which as you may note, is because of the emta functionality the 6183 lacks. So if you need a reasonably priced 16x4 channel modem that doesn't have all the bells and whistles of the gateways the ISPs try to rent you and you dont have voice service from comcast, you can get an arris 6183 and save a few bucks. If you however have a triple play with voice, this modem is basically a 6183 with voice. If you check the datasheets its the exact same broadcom chipset. If you feel the need to check the webUI of this modem you will find its very simple and there isn't a lot you can do from there other than check the status and reboot the modem. The webUI is very lean on functionality. But honestly, I dont consider that an issue because as subscribers to an ISP we dont really handle any of the configuration anyway. The modem downloads the docsis config form the ISP when its provisioned so really that point is moot.