Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Can I use this router with my Comcast wireless  modem?
Document: I'm on Comcast Cable and the DNS are correct. Should I use something else?Any suggestions on how to solve the issue with the router not detecting the Internet connection when there is one and the DNS Problem?I heard from netgear support but haven't heard back yet. Hoping I do.Environment:- Windows & iOS- Laptops(s) and iPad.- Comcast Broadband Modem (Arris tg862g Telephony Broadband Modem with the wireless disabled by Comcast support - the range was terrible.
I had been wanting to get a new wireless router (to replace my Belkin Wireless N) for some time, as with all the wireless access peripherals we use in my house (xBox, TV's playing Netflix and Amazon Prime videos, several laptops and cell phones and tablets using Wi-Fi), we were getting drops all the time.I was thinking I would first replace the modem that Comcast originally supplied me with, with a Motorola SurfBoard SB6141 DOCSIS 3.0 Cable Modem, as it had great reviews.
My wife as well as my self cannot access the server, our webserver or any of our other computers. ZERO CONNECTIONS. EVERY DAY this thing drops. I know the routine that Netgear gives me and it works, but having to reset the router means having to reset the wireless networks SSID, Passphrase. Netgear keeps telling me to reset the modem. It's not the modem. I have comcast business class and my Vonage router is hooked up to one of the ports and I never lose my internet.
Upgraded comcast service from 20 Mbps to 40 Mbps. With a new DOCSIS 3.0 cable modem (Motorola SB6141) and this wireless router, I am now getting 36 Mbps down and 6 up wired and same with WiFi if close to router. Triple the speed from before altho nominally only doubled. Little large, but not an issue for me as I have tabletop space. Great to have 4 ethernet ports in back. Setup fairly easy. Much better security than my old arrangement.
Fast wifi! I'm a comcast customer and just got rid of their 2 in one Wireless gateway modems for a plain old modem. I plugged this bad boy to it and well.... you aren't ready for it. The speeds will knock your wifi socks off
I bought this Router because I had too many Wireless things on my Comcast Router. I added this router to my Comcast one for wireless use only and I was able to pick up my wireless items better and much father away. Best router I have ever used and set up is very easy and if you have a single problem the software will fix it for you just click REPAIR and you are going again in a few seconds! !
I love this router, the connection speed is great. *SETUPThe set-up was very easy; it took longer to disconnect the battery in my Comcast voice modem to power it off (step one of installation) than the actual set-up of the router. *SIGNAL STRENGTHMy existing Netgear WNR1000 (802.11n) gave a signal in another room at 48% and the new Netgear R6300 went up to 78% + immediately in that room.
I can barely get 1-2 Mbps down and 4 up. IT is like a slow death where the download speeds keep dropping daily. I called Comcast and they advised to connect laptop directly to the modem (Motorola SB6141) via Ethernet. That gave 25 Mbps down and 4 up indicating it is not the modem or Comcast. So I turned off the router and unplugged for a minute then turned it back on and the same problem continued (1-2 Mbps down).
However, I was **never** able to experience them. Right out of the box, the web interface of the router didn't work. It powered up okay, all the LEDs behaved as it should. It even provided DHCP services; my computer got the right address 192.168.1.2. I was able to ping the router at 192.168.1.1. It even recognized my Comcast cable modem and got the necessary Internet connection configuration (DNS servers etc.).
Hardly ever could I understand support because their accents were so heavy. Finally the last guy I talked to suggested that I call Comcast and have them bring out one of the new combination router and modem. I did that and the new Cisco combination unit from Comcast has been working great for a couple months. I then called NETGEAR back to get an authorization to return their device and they tell me I have to hook it up again to make sure if is not defective. Unbelieveable.
Answer: I really don't know why you couldn't, but I would call Comcast and ask them.  I have Charter Cable and it works great.