It should be shown as a COM device.
I had one by past. Yes it was a lovely radio.
I have now a DV1. This changes my life!
I'm pushing my dealer to developpe a smoother and more ergonomic software for this DV1.
Is your MK2 celullar bloked?
I went to Best Buy this morning and picked up a USB to db9 that is windows 10 compatible. It works like a champ. It's not blocked. But the cellular stuff is digital so I don't think the 8600 will pick anything up?