Extension state between two iax2 trunks


I have two iax2 trunks configured and working properly, but now I need to report the state between their extensions. I want to show if the extension is in DND, Busy, etc. It’s working with no problems with the extensions over the same trunk, but in an extension of the trunk1 I don’t have the state of any extension of the trunk2.

How can I configure my trunks to report the extensions state between them?

Thanks, Samir.