External PBX

[YLess4U]

Hi,
We have a company that is joining us that has their own internal PBX.
I want them to go via our PBX but it needs to connect via a SIP trunk.

Whats the best way to configure that.

 

[leejor]

If the other PBX is able to register to a VoIP provider, then they should be able to register to a Master bridge trunk on 3CX.
See... https://www.3cx.com/docs/

You'll have to work out the routing, and any caller ID issues.