Connecting PBX Bosch integral 33xe to PBX XVB - VirtualPBX, how to connect?

Question

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Good afternoon!
We installed a new XVB-VirtualPBX PBX server, everything is connected and we are working on it, a separate office was connected to our organization and they have a Bosch integral 33xe PBX , and accordingly set the task of combining these PBXs so that their 900 internal numbers called inside their office and 30 to external numbers through our virtual machine. Help to unite two automatic telephone exchanges.

Answer 1

here one smart person wrote:
add that gateway from the tenant
go to / ai interface and enable the checkbox PBX mode on that gateway
in this case vpbx will consider that all calls from that gateway (PBX) are calls from the phone
setting the caller id of the phone in this case lies on the connected PBX
for incoming calls in the routes, you need to make a rule for that pool of numbers and send it to that gateway
, help decipher how to do it