You can use the FRITZ!Box 7312 in a Windows-free environment, you do not need any Windows-software to initialize it. You must connect it to your LAN and surf to http://192.168.178.1 to configure it.
It has been said that the FritzBox 7312's WLAN is okay for a flat, but too weak for a house. The FritzBox 7270's WLAN is supposed to be strong enough for a house, it has three antennas etc.. I wanted to test this. So I put my Latitude 2100 into a cellar room and started the command
iwlist scanning | grep -Ei "quality|essid"
I used the same command with a FritzBox 7312 and with a FritzBox 7270 with the same laptop with the same distribution on the same position, same kernel etc. The result was
|device||quality of WLAN|
- FRITZ!Box 7270
- https://secure.sipgate.de/user/configreader.php?show_conf=fritzbox7390 - configure sIpGAte with the FritzBOx