I'm not sure I'm understanding what you want to do. If Phone #1 wants to call phone #2, that's what the Intercom is for.

You can add as many lines to a system as you have slots in the KSU. In large systems we would use 584 panels that had 13 slots. I've installed PBXs with HUNDREDS of 584 panels.

I don't understand what you mean about the ringers and buzzers.

On a larger system we'd use larger power supplies and common the grounds between them. After that, everything worked.

Sam


"Where are we going and why are we in this hand basket?"