Question about RCA Thomson Digital Cable Modem (DCM305R)

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RCA DCM425 modem ethernet connection won't work

I was using the USB connection on computer 1 to talk to the RCA DCM425 modem. It works. When I try to use the ethernet connection it doesn't work on computer 1.
Computer 2 does connect to the modem with ethernet.
Is there some setting on computer 1 that has to be changed to allow ethernet? Then I can use the router for both computers.

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Re: RCA DCM425 modem ethernet connection won't work

In short, you have to either

  1. renew your ip on Computer 1, or
  2. hard-reboot your cable modem and then reboot or renew your ip on Computer 1.
Details below.

The modem is communicating with the servers at your ISP (Internet Service Provider) to give your computers an IP address. The ISP may have your modem set up to be issued only one IP address. Thus using both USB and Ethernet could be restricted by your ISP.

The IP address is most likely a dynamic IP that expires after a few days or weeks, unless you bought a business account that has a static IP (which is used for hosting permanent websites).

When a computer is not communicating with a Cable Modem or you shift between the connections on the modem, it may be necessary to re-establish configurations. The following can be steps to reset all components to re-establish configurations:
  1. Do a hard-reset on the modem. On the back of the modem is a reset pinhole. If you press the button quickly, this can soft-reset the modem, just restarting the modem. If you press the button and hold it for more than 10 seconds, this can hard-reset the modem, thus resetting and re-establishing configuration with the ISP servers.
  2. Restart the computer or at the command prompt (Start | Run | Cmd | Enter) issue two commands ... "ipconfig /release" and then "ipconfig /renew". This will release your IP and request a new one from your ISP.
These steps are required when adjustments occur especially when shifting between connections on the back of the modem.

Posted on Nov 26, 2007

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Re: 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.

Posted on Nov 26, 2007

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