It does but it is a technical term. In telecommunications it means that certain information is transmitted through a different channel, possibly even through a different medium either to avoid confusion by the recipient or to make it harder for unauthorized listeners to get the complete information.Out of band doesn't mean much in english.
Not really, you wrote "bandwidth (broadband etc)". That would be about transmission capacity or speed. The concept of "out of band" has nothing to do with that, it is about transmisson channels and priority. And that is what the German expression is about as well - although it is not restricted to telecomunitation. It could be about anything where procedures are applied; work-related or otherwise.Yes I know that is what I said.