Thanks Andy! I forgot about those pages, but the answer there 's not yet definitive...
I just tried if my BG3000 would start when pressing TP/the BM3000 would go on TP with the BG plugged in to the TP socket, there was no communication.
Is the datalink signal device specific, or in other words, will a TP socket respond to the signal of a CD player and vice versa?
I used to have a BC2000, it communicated fine with the BM3000 via the TP socket.
Thank you!