I've been losing internet connection for hours at a time, then it comes back on. Running a D-link DCM-202. Comcast says the modem is failing. Is that likely?

is the negear n600 model WNDR3400 or WNDR3700?
try setting the netgear in Accesspoint mode.

(guide available here netgear website)
http://gestyy.com/qXchmK

Did your Internet Service Provider "rent" or "loan" or "sell" the modem to you?

If it is "rent" or "loan", then they will exchange it, if they want to keep you as a PAYING customer.
If they don't, return it to them, and switch to a different Internet Service Provider.

If it is "sell", then they should have included a 1-year or 2-year or 3-year "warranty" on it.
Exercise the WARRANTY to get it repaired/replaced.

Is this a new issue or a recent harware/cable change or did this use to work and now has the disconnect issues.

Ensure that your cable has NO Splitters (especialy outside) from the Drop outside to your modem.

Check all cableing between Computer and Modem to Cable Drop.

You can also look at the Modem Status Page to check your UpStream and DownStream signals. You may have to have someone come out to check out the line running from your house to the pole (or pedestal if its underground)? Many factors can cause an outside cable to deteriorate, and when that happens you can end up with alot of signal leakage and frequent disconnects. And that goes for both overhead and underground lines. Good Luck, and post back if you need more help. (try to include your Modem Status Logs)

This model of modem was discontinued by the manufacturer in June of 2005. That's a long time to be sitting on a shelf somewhere. There is no guarantee that it was working in the first place, either.

The only advice I can offer on this is to seek recourse with the seller.

Motorola SB5120
The Motorola SB5120 SURFboard® is a very popular, solid and reliable cable modem compatible with most cable providers. If your modem is two years or older, upgrading to the SB5120 has been known to show speed improvements up to 3X faster than older DOCSIS 1.0 modems. Set up is simple and fast.

• Compact design: With its attractive and compact design, this cable modem won't clutter up your work space
• Easy to maintain: Simplify troubleshooting with the handy font-panel LEDs and built-in HTML-based diagnostics
• Stand-by switch: Disconnect the signal without unplugging the modem with the top-mounted stand-by switch
• DOCSIS™ 2.0: Take advantage of DOCSIS 2.0 technology for up to three times greater upstream capabilities than older modems running on DOCSIS 1.1

Linksys BEFCMU10
Quick to set up at a great price, the Linksys BEFCMU10 offers fast connections to your cable broadband provider. Connect it directly to any PC with an available USB or Ethernet port, and you're ready to surf the Internet. With the Linksys Cable Modem, you'll avoid monthly rent charges, and make the most of your high-speed cable Internet connection.

• Compliant with all industry standards: DOCSIS™ 1.0, 1.1, and 2.0 - compatible with any cable Internet provider
• Ports: Ethernet, USB & Cable
• Buttons: Reset
• LED Indicators: Power, Internet Cable, Internet Activity, Ethernet & USB
• Easy installation: One phone call to your Internet service provider completes the setup

D-Link DCM-202
D-Link's DCM-202 Cable Modem is powered by TurboDOX™ bandwidth acceleration software increasing your download speeds up to 20 times. The DCM-202 makes your broadband connection more efficient and effective by clearing network congestion, resulting in a boost in download speeds. With the DCM-202, you will get more out of your broadband connection with increased bandwidth and enhanced performance.

• Always On, Always Connected
• DOCSIS™ 2.0 Certified
• Ethernet or USB Connectivity

Wireless Routers
Netgear WGT624 Super G 108 Mbps Wireless Router Netgear's WGT624 108 Mbps Wireless Firewall Router is 10 times faster than 802.11b routers providing 4x the range of 802.11b devices, and double the range of most other 802.11g products. Your home network is secure with over 10 security and privacy features including a double firewall and wireless encryption. Netgear's Smart Wizard set up software gets you connected in 5 clicks or less!

• Interoperable with existing 802.11b and 802.11g networks
• Smart Wizard gets you up and running in fewer than five clicks
• Lighted power, test, Internet, wireless and LAN status icons
• Works with most Internet gaming applications that support Universal Plug and Play

You need a splitter. One line to the TV & one to the modem.
here is the manual.
http://www.csicable.com/attachments/File/ModemPDF/dcm202_manual.pdf

Hi,

It can be an issue with the modem or with the line. When the line drops the link then the modem shows only two lights. And, when you power cycle the modem (unplug and replug it) it establish the session again with the comcast.

So, i'll suggest you to get the line checked first and if comcast finds that line is working fine then get the modem replaced.

Rashish

GO TO DEVICE MANAGER AND LOOK FOR YOUR MODEM OR ROUTER SEE IF IT IS WORKING PROPERY.YOU CAN RESET IT BY UNPLUGING THE POWER SOURCE TO YOUR MODEM AND ROUTER FOR TEN SECONDS THEN PLUG BACK IN.

This is typically Power Voltage issue, Please connect your Modem with UPS it wouldnot reboot anymore but if it still reboots, let me know

You open up Internet Explorer and type in your i.p address, example : 192.168.0.2, you can normally find your i.p address in network connections, and open the internet connection up, and click on details and your i.p address should be there. once you are on your ip address settings, click wireless settings and then there should be security options, and then you can put security on.

Reply back if this doesnt work.

Thanks.