3com used to be good things back in the old days. But this hardware is probably self destructing in some way (the problem is widespread, the manufacturer claims it is an old product and gives no solution). Do NOT buy network products from 3com (HP today). Correct me if I am wrong..
SOURCE: It become very slow when I switch my adsl to adsl 2+
Firmware Upgrade
1. Please verify the model and version of the router underneath it.
2. Go to ftp://downloads.netgear.com/files/dg834v2_dg834gv2_3_01_38_uk_only.zip to download the firmaware.
3. Save the file to the Desktop.
Note: Please perform firmware upgrade with wired or Ethernet connection only. Before you upgrade, write down all current settings as you need to enter them manually after upgrading.
4. Using the computer hardwired on the router, open any web browser like Internet Explorer or Netscape Navigator.
5. Connect to the router by typing http://routerlogin.com/basicsetting.htm or http://192.168.0.1 in the address field and click Enter or Return key.
6. A window will prompt for a user name and password. The default username is "admin" and the default password is "password".
Note: If it does not take password as the password, you might have changed it when you have run the NETGEAR Setup CD so please try other passwords. If you cannot remember the password, you need to reset the router and run the Setup CD to reconfigure it.
7. Click on Maintenance and then Router Upgrade.
8. Click Browse and locate the upgrade file in your Desktop. Click Upload.
9. Please wait for the router to reboot.
10. Reset the router.
a. Please push the reset button at the back of the router and release after 30 seconds.
b. Unplug the power adapter for 10 seconds and then please plug it back in.
SOURCE: I have a 20 mbps adsl line, but whene i connect
This issue is most likely due to the quality of the signal between the PC and the wireless. If there is a lot of interference or the wireless devices are far from the 3COM, then the signal will be less then optimal. Sinnal quality will degrade quickly when going through walls floors and celings as the density and metal contained in these structures block wireless signals. Interference can come form other wireless devices, cordless phones, RC toys and some wireless mice and keyboards.
The other factor to consider is the type of wireless being used. Wireless like all technology get better as time goes by. As new technology comes out it is categorized and classified. For Wifi there are currently 5 separate specifications for wireless. They are:
802.11 (Specless) - approx 1997 era devices. operates at 1 to 2 Mbps
802.11 a - approx 1999. operates at 6Mbps.
802.11 b - approx 1999. operates at 11 Mbps.
802.11 g - approx 2003. operates at 54 Mbps
802.11 n - October 2009. operates at 100+ Mbps
If you have an old wireless device it will work with the 3COM but only at the speed it was designed for.
You can always check your speed by connecting directly to the 3COM with ethernet cable and going to http://www.speakeasy.net/speedtest/
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