So you think the photo is of an isolator, albeit a powered one?
My install was done about 3 years ago and includes no isolator cables, just standard VM coax throughout.
I don't want to get VM to come out without good cause (and be charged) as everything works ok (other than having a few ground loop issues) hence why I'm trying to establish if something was missed from a safety point of view on install or if the current set up is sufficient.
Have you booked an install or quick-start with us? If possible we'd always send out a quick-start kit and if needed to do so we'd convert this to a manned install with no extra charge. The activation fees would apply unless stated otherwise with the team.