I have never played with a Lexcom system, but I would guess as CAT 5 only has 4 pairs of wires meaning 8 wires and MasterLink signals are 9 active wires plus ground then they are likely to have not used pin 3 of the Masterlink which is "ML Sense" which is not used in a lot of products but may well be used in Beolink Active.

I suggest you check to see which wires on the Masterlink cable are connected to the Lexcom system.

A bit tricky as the excom is terminated in a RJ45 meaning its difficult to see what's what when it connects to a wall socket!

I suppose I'm lucky enogh to get the TV and Hi-fi working together. I just didn't realise the active/passive kits were different than the TV and hi-fi's - I though ML was the same !

I'll update if anything improves...

Why not check with a multimeter which pins of the Masterlink are connected to the RJ45.

I notice from the user manual on the web that they use mains earth as their signal return meaning pin 3 is the most likely connection missing.

I am using the Lexcom cables as well. Beolink Passive works.

BUT - I got Cat 7 cabling in the house (ML distribution box in the server room), see pictures in one of my posts.

So, this might be the issue...

Ralf

In my previous post to this I mentioned the reason for having all this hassle was because he only had CAT5 and BOSElink cable in the walls.

Well we've managed to convert the Boselink to masterlink 😕