It might happen that your T410 wireless doesn't work after installing Debian, because you didn't have the non-free firmware at hand.
You'll find the missing firmware at the packages site. After you downloaded and decompressed the tarball put the file iwlwifi-6000-4.ucode-9.221.4.1 into /lib/firmware and create a symlink:
# ln -s iwlwifi-6000-4.ucode-9.221.4.1 iwlwifi-6000-4.ucode
Now, its time to reboot!
