I bought the BeoCom 5 today. The shop said - to register it to the existing BeoCom 6000 set up - unplug the 6000 base, give it a few seconds, plug back in and do the registration thing. That didn't work, because the BeoCom 6000 is the original, oldest version, and it doesn't work like that. Of course the user manual is long gone. B&O don't