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Networking with another PABX


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I guess you want to be able to send traffic to the PBX, e.g. when dialling certain numbers and you want to be able to receive traffic from it as well.


If you can route packets from and to the PBX (e.g. because they are in the same LAN or because you use VPN between the locations), I would probably just use a gateway trunk and the dial plan to send certain numbers to the other PBX. You can think of the other PBX like a service provider that takes care about certain numbers, and the calls are like PSTN calls. When receiving calls, you can tweak the extended regular expression pattern list on the trunk to send the incoming call from the trunk to the right destination, again similar to what you would do with a ITSP.

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