How to wire old BPT C/200 intercom handset to Fermax 3431 EVO?

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Hi all!
Trying to wire old BPT C/200 intercom handset to Fermax 3431 EVO and just can't make it work.

Usee manual, but it doesn't work.

Existing working Wires on BPT c/200

5 - green with white
7 - blue with white
8 - orange with white
9 - white with orange

And new Fermax 3431

6 - green with white
4- blue with white
3- don't know what should be there????
2- white with orange
1 -orange with white

Where wires should go from existing BPT C 200 I to Fermax 3431?

6- ???
4 -???
3 - ???
2 - ???
1- ???

Thank you in advance.
 

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Don’t think it will work…..as most intercoms are 5+ 1 , the bpt handsets are 4 wire ( I think the door release signal is sent down one of the 4 wires ….)
 
As per this diagram
 

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