How to share extensions in multiple PBX?

General Help
1

Hi all

Let’s assume I have three freepbx system A B C
System A has two IAX trunk, the one to system B and the other to system C
From system A i can call directly system B or C extensions and vice-versa

How (if possible) can I call system B extensions from system C and vice-versa without a trunk between B and C systems ???

(let’s say system A is the center of a star network)

Is there any feature (like in Avaya systems is called “small community network”) that automatically instruct and share about resources of the pbx network ??

Thank you

2

Research DUNDI and see if that will work for you.

3

Thank you for information
I think it is exactly what i was searching for…
Do you (or anybody else experienced) know if , following my example, a DUNDI trunk/config between A—B and A—C does the B and C pbx to know each other of their extensions and eventually place a call via A pbx ??
Or I need always a meshed network rather a star one ??