Question about deploy scenario

[Hoygen83]

Hello,
I've been tasked with the following activity:
In the same network.
Deploy a master pbx with 3 digit extensions under windows 10.
Deploy a slave pbx with 4 digit extensions under Raspberry PI 4 B.
Can that be done?

 

[NickD_3CX]

Ok, so i am thinking, would it be possible to this:
when 4645 calls an external number, since we have all the sip trunk on the 3 digit 3cx, the call goes out using a specific sip trunk?
Maybe in the 4 digit 3cx I could make an outbound rule that prepend 9894645 to the dialed number.
And then in the 3 digit 3cx I could make an outbound rule that if the number start with 9894645 it strips the firt 7 digits (9894645) and use the sip trunk designed for 4645?
[to be honest, my first proposal to the customer was to just use a 4 digit 3cx, my second proposal was to use the sip trunks meant for 3 digit in the 3 digit and the one meant for 4 digit in the other. but with the customer asking so many customizations this is getting definitely interesting.

I suppose this could work, yes. On the Outbound Rules of the 4-digit PBX, for 3 digit destination numbers leave unaltered, for anything higher than 4 digit destination/dialed numbers, prepend something, then on the Outbound rules on the 3-digit system, detect the specific prefix and strip it.

 

[Hoygen83]

Just get trunks on both and you'll save hours of messing around.

You CAN call from PBX A to external on PBX B, but you cannot filter in B based on groups or extensions from A.

Wish I could.
It is not messing around, it is doing what I'm told to do with the tools I have.

 

[Evolute IT]

Wish I could.
It is not messing around, it is doing what I'm told to do with the tools I have.

Is the customer a network and VoIP mastermind?