Question about RCA Thomson Digital Cable Modem (DCM305R)

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Can't get modem to work if I use the USB connection

Hi, I recently got a RCA Thomson THG520 cable Modem. It works fine using the ethernet link but I want to try the USB link as well. When I plug the USB cable into my computer and then into the modem, my computer (windows XP, all updates installed) runs through the usual "Found New Hardware" procedure and tells me that the new hardware should now work properly. Then the connection tries to get a network address but it never does - when I try to repair the connection it tells me that it can't acquire an IP address. anyone had this problem before? thanks

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Re: Can't get modem to work if I use the USB connection

Your computer is attempting to find the network connection through your LAN port. Your best bet is to reconfigure your network settings to seek its external network connection through USB, or better still, obtain a router(I personally recommend linksys wireless/basic routers due to stability), and simply use the ethernet connection through it. While this is bypassing the initial issue, it is also saving yourself a lot of hassle when it comes to retooling the PC's settings on the USB connection.

Posted on Jun 04, 2007

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How do I get a RCA modem to run in Ubuntu Linux? The modem works in XP, just fine.

There are no drivers to operate the modem as a USB device. Using a crossover cable (one should have come with the modem), you should be able to connect to it via the Ethernet ports on your computer and the modem.


2 Answers

RCA DCM425 modem ethernet connection won't work

The setting for the Computer 1, use the network connection wizard to automatically configure the modem to work as a server station. Next, set the IP number manually and the DNS at automatic or is given by your ISP. Now the Computer 2 (workstation) should be connected to a Hub/Switch. The same, go to network connection wizard and select the appropriate connection setting, there are view samples for the connection types so explore them. After the setup, try loading your internet browser.... When done, it should work fine. Keep me posted for any problems.

Nov 26, 2007 | RCA Thomson Digital Cable Modem (DCM305R)

1 Answer

Cmment utuliser ce modem

  1. Save your work and shut down your PC.
  2. Connect the coaxial cable from the coaxial jack in your wall to the coaxial port on the rear of the modem. Turn the connector clockwise until the cable is firmly connected to the modem. Gently tug on it to make sure it is connected.
  3. Connect the appropriate cable, USB or Ethernet to the matching jack on the rear of the modem. Connect the other end of the cable to the appropriate port on your computer.
  4. Connect the modem's power adapter to a surge suppressor or a dependable wall socket.
  5. Press the power switch on the front of the modem to turn it on. Power up your PC. If you opted to use the USB connection method, you may have to install the appropriate drivers. Check your owner's manual for specifics.
  6. Launch your web browser to verify Internet access.

Dec 04, 2010 | RCA Thomson Digital Cable Modem (DCM305R)

1 Answer

Comcast is my service provider and I have had an RCA DCM 245R modem for almost 10 years. Until recently it has worked fine. On an ever increasing basis I am losing internet connection and when I look at...


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.


Aug 15, 2010 | Thomson RCA DCM245R Modem

1 Answer

I have a RCA Thomson DHG 535-2 without the disk for the installation and the ethernet wont help everything is hooked up etherent/cable to tv power yes... and that's about ti all im really missing is the...

Thomson Cable modem has an ethernet connection...
The ethernet connection goes to your computer via a standard Cat5e patch cable. There is no USB that I know of...
Cablevision wire goes to the modem. It should be the first device on the cablevision wire. If you need a splitter, it needs to be a GOOD one, connected DIRECTLY to the incoming Cablevision wire as it enters the house. Use good copper wire.

Order of events:
Connect the cablevision wire to the Modem.
Connect the Ethernet cable to the computer and the modem.
Power on the cable modem.
Right click the network Icon near the clock and click 'repair' (Or reboot the computer)
Apply for and get an account for cable Internet from your Cable company.
After a few days, cable Internet should work.

Apr 16, 2010 | RCA Thomson Digital Cable Modem (DCM305R)

2 Answers

Trouble connecting netgear wireless router to rca modem DCM425

First try connection the Yellow ethernet cable from the rca modem to your computer's network connection. If you get a connection this way, then your modem will work with a ethernet cable. If not, then call Comcast for help. The modem ethernet out to computer port must be connected to the wan line of the router. Then you can connect an ethernet cable from your computer network connection to one of the 4 ports of the router. For wireless connections you must set up the router and wireless adaptor with the same settings to connect. Follow the routers directions.
Good Luck


1 Answer

DHG535-2 and LAN switch issue

It sounds like the LInksys that they replaced was also a router. A router will route packets to multiple pc's that are connected to it. The cable modem just sees the router as 1 pc. When you use a switch, the cable modem will see all of your PC's. and Comcast just allows 1 pc. You will need to buy a router to use more than 1 PC which will be cheaper than using Comcasts Home Networking service which will network up to 4 pcs

May 29, 2009 | RCA Thomson Digital Cable Modem (DCM305R)

2 Answers

How can i connect an additional pc to my rca dcm245 cable modem? i have an ethernet hub.

Hi there.
What you have to do is plug in the Ethernet hub, run the Ethernet cable (RJ45) from the modem to the "internet in" or "internet" socket on the hub, it will the one which is separated from the others.
Then connect an ethernet cable in port 1 to your first computer and a cable from port 2 to your second computer and so on.
If you experience connection problems just pull power from the modem for 30 seconds, plug it back in wait a minute and reconnect.
If you would need further assistance please post back.

Good luck and thanks for using FixYa!!

May 25, 2009 | Thomson RCA DCM245R Modem

5 Answers

Ethernet vs. usb

FYI for those people trying to use a ethernet and usb cable from a cable modem - it may work for a while but it won't work forever - your ISP will only allow one IP address out of the modem unless you pay for additional addresses (then you need a switch). Each device you have on the modem is fighting for that IP and eventually it will just quit working (if it works at all).

If you want more than one computer on your network (on the Internet or sharing printers/files, etc) then you need a router or a gateway (cable modem/router combo which I DON'T recommend).

Feb 09, 2008 | RCA Thomson Digital Cable Modem (DCM305R)

1 Answer

I can't get my computer on the internet . I am using windows xp and the modem will not get the internet on the dell computer

Hi, This modem can be used via one of two ports: ethernet port (network port) or USB port If your computer has an ethernet port, it is perferable that you connect through this as you will have better performance. If you don't then you can get an ethernet card installed inside the CPU. If it's not possible to connect via this connection and you have to use the USB, then you will need drivers. This website gives you full instructions on how to use this particular modem and also gives you the USB drivers if needed. Good luck! Lolita


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