My 3com router starts and every a 30 second unpluged and and pluged again. and dont sync. when i go with 192.168.1.1 sometime giv me the firmware page boot or runtime. and sometime giv me the router configiration page the wizard page and internet status. M.Ahmed thank you

The downloaded file is "corrupt", and thus it fails the "verification" process.

Download the firmware again, and compare the two files.

Or, use a different computer to download the firmware, and to do the firmware-update.

reset the router , press behind botton name reset for 20 seconds and try to conect again , if you have a cd installer run and install and fallow the instructions, if you dont have any cd installer go to web site linksys and download

I have same problem. So the solutions is (in my particular case), when you done everything as it written in the reseting instruction. You face blinking LAN/WAN ports and no any activity with Alert LED. After 30 second or even 1 min (i don't relly know do you need to wait or not), i disconnected LAN/WAN ports and connected it again without repowering. Then Alert LED starts to blink slowly every 2 second. After re-applying power it was reseted.

WRT160N router has issues with firmware. Upgrade the firmware of the router.
Download the new firmware from the web site www.linksys.com/download . save it on your computer. open the set up page of the router.
Upgrade the firmware of the router. Once you upgrade the firmware , reset the router for 30 seconds. Release the reset after 30 seconds. wait for 1 minute. unplug the power and plug it back in. wait for 1 minute.
Now you will need to reconfigure the router.

Click here for more information

You can simply update the firmware of the router if it keeps dropping your internet connection. Download the latest firmware from Belkin website and install it. Now the trick is you need to hard reset the router before and after you update the firmware. To hard reset it, press and hold the reset button at the back of the router for 30 seconds. After that unplug the power. Wait for another 30 seconds before you plug it back in.

Hey ! it seems that there is a problem with the Firmware of the router.
The wireless connection is dropping.
You can try to upgrade the firmware.
Download the firmware from the support web site of the router manufacturer. and upgrade the firmware.
make sure that you will upgrade the firmware using the wired connection to the router NOT with the wireless connection.
Click Here for more info about the networking

The 3com website is remarkably shoddy on this issue, and doesn't have the newest required updates. Even the KB on their site is thin on solutions.

You really need firmware 3.6.4, yet 3.0.1 is the latest on the official website. Try this page:
http://3crwdr.googlepages.com/

for the very latest firmwares, and note that it's best to clear out the router memory completely before adding the new firmware to it. This is because it sometimes doesn't like the new image files otherwise. The way I suggest:
1. Note all of your settings manually (don't save a config file, it may not read back in).
2. Hard reset and clear the memory, by holding down the reset button and powering on.
3. Connect to 192.168.1.1 with your browser - you may need to mess with the network settings on your PC to get it to connect. You will see a very bland screen, asking you for a firmware file, rather than the traditional login screen.
4. Upload the latest firmware, downloaded from the site above.
5. Allow the router to do it's business and restart.
6. Connect back to 192.168.1.1, and you will once again see the correct router software, with a new install wizard.
7. Re-enter all your settings, as noted above.

Firmware upgrade is a simple but a delicate procedure. Make sure you are loading the correct firmware. You should get your firmware from the website of your router. Installing a THIRD PARTY firmware to your router voids the warranty of your router. Here is a tip for a successful firmware upgrade. BEFORE FIRMWARE UPGRADE(push the reset button of the router for 30 seconds then unplug the power of the router for 10 seconds). Upgrade the firmware. After the upgrade push the reset button again for 30seconds, unplug power for 10 seconds.

There are actually 3 models of the WL-542. Go to this page and select "All downloads" in the section matching your model. You will find the exact model number on a sticker on the side or under your WL-542.

http://www.3com.com/products/en_US/searchbyproduct.jsp?search=3CRWDR100&sort=fname&searchby=sku

Are you able to login to the router? If you can reset the router to factory defaults..If you can't login to the router...Is there an external reset button on the router you could try to reset. with a paperclip? Otherwise, I had this happen on a linksys router/switch. New router time. You should just return it where you purchased the product. There was already something seemingly going wrong if it was rebooting. 3 weeks? just return it. don't even mention the firmware update. Here is the site info for 3com: http://knowledgebase.3com.com/ OfficeConnect - Firmware upgrade fails with incorrect user interface image Problem: Incorrect user interface image Problem: Firmware upgrade fails Problem: Error when upgrading firmware Problem: Incorrect firmware Problem: Wrong firmware Fact: Firmware Fact: Download Fact: Update Fact: Upgrade Cause: The downloaded .exe has not been extracted Fix: The downloaded .exe needs to be extracted by double clicking on it. When performing the firmware update use the extracted files that were obtained from the "exe" file. e.g You will obtain a "bin" or "dlf" type of file which is the firmware required for your upgrade. Let me know what happens. Good Luck, Tim