I did it this way:
Connect your PC to the Fritzbox via the Ethernet (LAN cable) and set the IP address of your PC's LAN adapter to 192.168.178.XXX (XXX between 003 and 253), the subnet mask to 255.255.255.0 and the gateway interface to 192.168.178.1 (if it doesn't work after several trials try 192.168.178.2)
IMPORTANT:
*Make sure your LAN adapter has a fixed IP address, e.g. 192.168.178.10
*Disable any IP-filtering or firewall
*Diasble any other LAN adapters
*Make sure you are accessing the LAN directly (not through an application software)
On your Windows XP PC open the "network connections" folder in one window and a "COMMAND" console ("DOS window") in another window. Enter the following instruction in the COMMAND console (do not press ENTER, just hold this comand line ready):
ftp 192.168.178.1
Now plug in the power supply and watch the network adapter status to change from "network cable removed" to "connection established" (3-4 seconds). That is exactly the time, when the ENTER key must be pressed.
Try and watch this change a few times before you press ENTER so you get a feeling for the time it takes. You may as well watch the LAN adapter symbol in the in the taskbar. This works with most WindowsXP installations but not with all.
If the Fritzbox does not react on the ftp command enter CTRL-C to cancel it and re-try the above with 192.168.178.2. If this doesn't work enter the "arp -d" command to clear the MAC table before starting ftp. Also, setting your LAN adapter to 10 Mbit/s Half Duplex may be a good idea (AVM recommends it). Repeat this a few times - use the arrow-up key to repeat command lines.
It is also a good idea to start the recovery program (see below) first. It won't work but it will scan the Ethernet connection and set up your LAN card the right way.
If you see the FTP login prompt enter "adam2" as user and password.
220 ADAM2 FTP Server ready.
530 Please login with USER and PASS.
USER adam2
331 Password required for adam2.
PASS adam2
230 User adam2 successfully logged in.
Now enter the following commands
for the standard Fritz!Box Fon WLAN model:
quote SETENV annex,A
quote SETENV HWRevision,66
quote SETENV ProductID,Fritz_Box_WLAN
quote SETENV firmware_version,avme
quote SETENV firmware_info,08.04.26
for the Fritz!Box Fon WLAN 7050 model:
quote SETENV annex,A
quote SETENV HWRevision,77
quote SETENV ProductID,Fritz_Box_7050_AnnexA
quote SETENV firmware_version,avme
quote SETENV firmware_info,14.04.26
Changing to Annex B would be respectively:
quote SETENV annex,B
quote SETENV HWRevision,76
quote SETENV ProductID,Fritz_Box_7050_AnnexB
quote SETENV firmware_version,avme
quote SETENV firmware_info,14.04.15
You can copy and paste all 4 lines at once (you can even include the login sequence and the bye command). Use the right-hand mouse button to paste. Enter "bye" when you're done. Don't disconnect the power line, you are still connected to Adam2.
Now run the recovery program, e.g. the one from
ftp://ftp.avm.de/fritz.box/fritzbox...n_wlan_7050.annexa.en.04.26.recover-image.exe from AVM (ask me if it's no longer there).
Enter
fritz.box_fon_wlan_7050.annexa.en.04.26.recover-image.exe at your command console. If anything goes wrong just repeat it (up to 10 times, keep the power supply connected).
AVM recommends to use the red LAN cable for firmware updates/recoveries as it is quite short (and shielded).
BTW, you can start the recover-image.exe program from the command console. You can even copy and paste the whole batch of commands including the recovery in one step. Only if the recovery program finishes successfully the box will reboot, otherwise it will stay connected.
Have fun!
(updated 19.01.2007)