We have the PBX connected via SIP trunk to another SIP system, and we'd like to be able to transfer calls from the auto attendant to this system. We've found a workaround of creating extensions in the PBX, then creating manual contact/registrations to the other system, but this is kind of ugly.
Is there a way to get the AA to look at the dialplan if it doesn't match an extension? So for example, if 3xxx are my PBX extensions, and 5xxx are my other system's extensions (and I have a corresponding dialplan rule) - will the AA look at that?
Currently I can't get it to work, but I thought we'd done it in the past with other installations.