Some of the AVM (Fritz!) devices are only supported by binary drivers coming from AVM. But these are no longer distributed on the install media.
Background: For different reasons some hardware that was supported out-of-the-box by 10.0 and previous is no longer supported by 10.1. Mostly this is because it has been decided not to ship binary only (closed source) kernel modules - in compliance with the GPL and the wishes of the kernel developers. A new system (KMP, Kernel Module Packages) has been developed to adress this issue - but as of yet not many binary only KMPs are available.