That is a different chart then the pdf I showed.
The one I showed, tells me that both the mkI and II are compatible with the beoline 2.
So, this isn't right.
But on the other hand accoording to the chart the BC5 not compatible with the beoline ISDN.
And my experience with the beoline ISDN and 5 mkI 's and a BC 5 is positive. No problems at all.