802.11g upgrade When I upgrade the PCMCIA card from 802.11b to 802.11g in my RCA DCW615R modem, the wireless is no longer recognized. Comcast does not have a firmware upgrade for this. RCA defers to my cable provider. Does anyone know how to resolve this? Thanks in advance.

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The RCA DCW615R is a cable modem and provides Internet signal to the connected computer. Windows 7 simply uses that signal and the Internet information from your provider to give your computer access to the Internet.
Reset the modem and turn off the computer until after the modem has been fully reset.

To set-up and secure the wireless router from unauthorized access, follow these steps: -
1. Connect the wireless router to your computer with a LAN cable.
2. Start your browser and enter the router's configuration URL IP address.
3. Enter the router setup, login and password
4. Change the admin password
5. Go to the wireless settings and change the default SSID and turn off SSID broadcast.
6. Setup encryption key the strongest is WPA2 (if not then WPA).
7. For further security measures - turn on MAC address filtering and enter the MAC address of the wireless cards on the computer/s you want to connect to this wireless router.
8. Record the settings you have made and keep it in a safe place and Save the settings.
9. Configure the wireless cards on the computer/s with the SSID and encryption settings of the router.
10. Remove the LAN cable between the router and the computer then the computers should be able to connect to the router wirelessly.

You Router supports either WEP or WPA Security. First thing to do is enable the security, it will become difficult to enter from other users.
IF your using a default gateway (192.168.x.x) which is your Router Address. You can enter by Internet Explorer to go inside the Firmware of your Router (http://192.168.0.1) then enter.

This is an example of firmware worksheet:


Good luck!
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Thank you.

you need a router to connect 2 pc to one modem at the same time

Hi there.
Yes the cable modem is more than compatible with DSL and ADSL connections

Good luck and thanks for using Fixya!!

You didn't say who your cable internet provider is, and many (or most, including Comcast) such providers require that the cable modem's MAC address be registered with their network. It's a security feature to prevent unauthorized (read: unpaid) users to access their network. The MAC address is usually found on a sticker at the bottom or rear of your modem. Write it down, then call your cable company's tech support the register it. It should work just fine after that.

mormally it should work fine

What it sounds like to me is that your router has been running for a while, and thus start to break down slowly. You coul try power cycling it.

power cycling:
1.) Only unplug the power cord from the modem only, for about one minute.
2.) After one minute has passed, plug the power cord back into the modem, give it a few seconds to boot up again, and it should work.

If the modem still does not work, then the problem might lie with the computer itself, very hard to see happen, but it could still happen.
If in then that case, you would have to system restore your computer to an earlier date. that it was working fine on.

I had the same issue with my RCA DCW615R. First time my ISP Comcast flashed it back to the old version. This time I could not find anyone who new how to do that. I used to have the software and I have searched the net. Seems they provider RCA does not have it.

This time I called Comcast because I noticed that the 192.168.0.1 brought me to their software update. They supplied me with the user name and password. I was able to get into the firmware and change all the settings using the new firmware. I think the only reason they gave it to me is because my printer is a network printer and it would not work unless I could access the firmware.

The old 192.168.100.1 does not work anymore because that was Cable Modem mode or CM mode. The new address 192.168.0.1 does work but you will need the user name and password from your ISP, this is RG mode or residential gateway mode.

Liked the old firmware better but they both do the same thing. Seems the Gateway works better with the new update. Still I would like to find the old firmware not sure why RCA doesn’t have it.