Call back when busy

Call back when busy

I would like to implement a feature that allows to automatically redial a phone number if it is found busy

When you find free, the system activates the internal route to connect the extension that made the request

I have to build me something through AMI or is there something ready on FreePBX?

I believe this feature is already available in a module called ‘camp on’. However, the freepbx wiki says it’s depricated in freepbx 13 and I’m not sure what it has been replaced with.

Thank you
It is what I was looking for, only that I would like it to work even on the external numbers
To this end I saw that by working you can build a PHP with AMI, if I go on the new place
Of course if anyone has anything is welcome!