door entry

[dimmer]

Door entry system
Function of each terminal

5 − 21 12 V DC supply voltage
+
8 common call (for witness note)

11 audio to receiver

12 audio from receiver

14 enabling

What is enabling?

In the photo we have 4 bell pushes


Would this be wired as the terminals suggest so.

so each flat would have a wire to 11-12

So 11 and 12 each should have 4 wires.

Yet they don't Could be joined in that spaghetti

any guidance on how these work would be appreciated

Thanks


View media item 52579

 

[OwainDIYer]

Looks like a BPT speech unit HA/200

System diagram is here
http://www.intercomsrus.com/handset pdf/BPT YC200 Intercom Handset Data Sheet.pdf
page 2 for use with 1 entry panel.