Mention in the new post what each of the decoders are, and if they are located in one room or three rooms.
You need to give detailed responses to get this kind of help.
Post this in the Installation forum
SLNB LMX501| Explora 2A (Primary 4,5,6) Explora 2A (Secondary 0,1,2) | Xtraview - decoders same room | 3 distributed HDMI endpoints via 2x4 Matrix
and Cat6 | 200/100 Fibre (OpenServe/Afrihost Premium UnCapped) | HD 5S in holiday mode