Paul, You have provided a lot of data here, but one thing stands out and that is the requirement of a pin code. On Mark I whilst there is a standard default pin for the base unit, because of a software error, if you have 6 handsets already registered to the base, then when you register the seventh it requests a pin and no matter what pin you use you

Phil, My last post in response to your comments got lost in the forum running out of capacity, so I will re-state my answer. The area you say is buzzing is also the area of the power supply and EHT transformer (Extra High Tension) and the buzzing is normally caused by what is known as Eddy currents which are around all magnetic devices such as transformers

Marcel, In its most simplist form a panel refers to the LCD panel in the BeoVision 7 which is made by a third party company. The chassis is the electronics which drives the panel and everything else. B&O do not make their own LCD panels.

Andy Unless you make some calls from it, you will have many more days to wait..

I can confirm that you do not need the backplate if using the "in wall" fitting

In a Lutron environment you normally do not just have the main Grafik eye unit, in fact more often than not it is installed out of sight, but you do have one or more wallstations which have the IR in them. These IR's in the wall stations do allow you to point in all directions, but the main unit does not.

Keith, I think your biggest issue with using any of the CAT cables is that they are twisted pairs intended for balanced digital signals to reduce noise. The cable which goes to the IR contains parallel stranded wires of low capacity. If you were to use 6 core alarm cable in my view you should be just OK. A typical example is alarm cable found at Maplins

Vic, You can dim fluorescent lights on one or more zones provided the zone has a GRX-TVI which also requires its own power feed plus a 0-10 Volt ballast. You can connect several fluorecent tubes to one ballast provided you are within the spec of the ballast. The costly item is the GRX-TVI which last time I purchased one was about £120 Further

You may also wish to review a couple of other threads on this forum in particular the one you will find HERE

The Lutron products which have the B&O option all work well with the Beo4 and have the same response as a B&O product