Ethernet Port seems to be a failure, but the USB works fine

reset your router to factory default....look for a small button on the router and keep pressing it until all the lights blink together at once.....do reply back

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

that would be a settings issue for the router..the output of the modem should work on usb or ethernet..can you see the router from your desktop management application?

OK. First of all you do not need a special or seperate driver for the Ethernet port. Its factory loaded with your OS.

All you need to do is plug the Ethernet cable into the LAN port on your HP Desktop and then into the LAN port (not the WAN port) of your cable modem.

The second thing is if its only a cable modem, then I suggest you proceed with caution as there is NO built-in firewall on a cable modem. Yes you will get on the net, but you are likely to be attacked with virus the moment you connect. I suggest you check very carefully whether the cable modem (if that's what it is) does/does not have a firewall as you would be very unwise connecting up like that.

Next, forget USB connection to the router/cable modem. That technolgy we've moved on from.. Your Vista shodul be 'plug n play' adn should configure the router for you. obviously that bit isn't so slick on yours.

Let me know how you get on..

Have you tried changing the lan settings, or better still use the disc that came with modem and it will auto install modem and configure settings.

the prob may b with the ethernet adapter on the computer or the ethernet port on the modem or the ethernet cable.....
to check ethernetadaptor  ping 127.0.0.1
to check the ethernet port on the modem...if u plugin the cable u should have a light lid up on the modem ..
to check the ethernet cable  try with an alt cable which is proved to be working

No, you don't need a card, as long as you have an Ethernet to USB adapter, you should be just fine.

Plug your cable line into your modem, make sure it's tight, but don't use a tool. Next plug the ethernet line from the modem to your PC ethernet port. Then plug in your power to the modem. Allow your modem to sync. Don't use the USB line at all. Do not even hook it up unless your computer doesn't have a working ethernet line. Don't run the disk either, it will only install the modem driver that is only used if you use USB.

If you have issues connecting after that, you may have to go into your ethernet adapter settings and make sure that it is using DHCP. DSL usually uses a different setting (PPP I think) and you will not be able to connect.

By the way, excellent choice in modems.

the ethernet port will already be active

The ADSL, Ethernet, and USB ports are located at the back of a Linksys modem. These ports are where the phone cable and computer will be connected. The ADSL Line should be connected to the ADSL port and the computer either be connected to Ethernet or the USB port., If u r using a ethernet cable no need to run the setup cd just connect the ethernet cable and contact ur isp..
do not worry about ur sagem modem, let it be inside.. just connect ethernet cables alone..

To setup a Linksys ADSL Modem with usb cable you need to perform two steps:

1. Connecting the Devices Together
2. Installing the USB Driver

Connecting the Devices Together
Step 1:
Connect the phone cable to the wall jack with ADSL service and then connect the other end to the ADSL port of the modem.
Step 2:
Make sure the power adapter is plugged to an available power outlet.
Step 3:
Connect the USB to the USB port on the back of the modem and then connect the other end top the USB port of the computer.
Step 4:
Power on the modem. After connecting the device together, install the USB driver. For instructions, follow the steps below.
Installing the USB Driver
Step 1:
Power on the computer.
Step 2:
When the Hardware Update Wizard window appears. Click Install the software automatically (Recommended).
NOTE: Windows XP has pre-installed drivers for the ADSL2MUE and will automatically install the USB driver for the modem.
Step 3:
Click Finish.