Here is a quick guide how you can enable telnet client on your windows os.

Go to Control panel -> Programs and features -> Turn Windows features on or off -> mark Telnet Client

Have fun telnet-ing  =)

Disclaimer: If you do this your warranty will be void. I am not responsible for any bricked devices.
(There is how ever an easy process how to restore your router back to original firmware LINK)

The firmware provided below HAS FIXED the problem of  all lan ports including wan port acting as a dumb switch.

The firmware provided below consists of LuCI, 3G modem support and opkg package manager.

In this article I will guide you through the process of upgrading your router with OpenWRT firmware

Benefits of OpenWRT:
-Newest kernel for your 3G modems
-No more 0,5 Mbs bug limitation on upload
-More stable than stock (No dropped connections)
-…

Lets get started, you will need:
– An active internet connection on 3G-6200n router (through WAN connection)
– Edimax 3G-6200n 2.21b firmware (My dropbox) or (EDIMAX POLAND)
– Link to OpenWRT firmware compiled by guenti (http://www.dropbox.com/s/y1radsg2re0fg4u/openwrt-ramips-rt305x-3g-6200n-squashfs-sysupgrade.bin) – This was what i uploaded to router
Link to mtd program (http://www.dropbox.com/s/kqj7jtnkc567b04/mtd)

Actual procedure:
1. Go and download 2.21b firmware (You can use my link or the official one)
2. Upload the 2.21 firmware to your router (Your router is located at 192.168.2.1 / username: admin /password:1234)
3. Now that you installed the 2.21b firmware go to to 192.168.2.1 and log in. Now you can aceess the hidden page at http://192.168.2.1/syscmd.asp
4. In the input box enter this command:

/usr/sbin/telnetd -l /bin/ash

5. Open Telnet  (Start-> Run -> telnet 192.168.2.1) Dont have telnet enabled yet? Follow this guide: Enable telnet
6. Enter the following commands one by one (after the last command wait for 5 minutes for router to install the firmware:

cd /tmp
wget http://dl.dropbox.com/s/y1radsg2re0fg4u/openwrt-ramips-rt305x-3g-6200n-squashfs-sysupgrade.bin
wget http://dl.dropbox.com/s/kqj7jtnkc567b04/mtd
chmod a+x mtd
./mtd -r write openwrt-ramips-rt305x-3g-6200n-squashfs-sysupgrade.bin Kernel:RootFS

If everything went smoothly you should be able to acces your router at 192.168.1.1 / admin:root /password: blank

Sucess Login interface

Many thanks to guenti from umtslink.org for compiling this great firmware.
If you want to upgrade to the latest firmware provided by him go to LINK and upload it through web interface.

If you like my posts please see About Tricks’n’Tips and see how you can support me =)

This is the procedure to partly disable onboard led’s. Currently this script only disables wireless and lan lights (Power and USB are still on).

Under Administration-> Scripts-> Init tab  copy and paste this code:

et robowr 0x00 0x18 0x1e0
et robowr 0x00 0x1a 0x1e0
wl -i eth1 leddc 1
wl -i eth2 leddc 1

This was tested on Tomato Firmware 1.28.0000 MIPSR2-105 K26 USB AIO-64K