Custom Provisioning Template / Variables + Question

It would be nice to have a custom-template that could be used for any brand.

What would help already:
Please provide an overview (list), maybe an extra Button with ALL available dynamic Variables (and maybe examples) in Vitalpbx Provisioning-Module.
For example: DND{EXTENSION} and so on. As of right now this is not listed anywhere. All other useful variables on one spot would be great.

With this it would be possible to create own custom provisioning.

How do you technical block requests on the provision url right now? Since opening it on a browser is “forbidden”. Edit: okay I think forbidden was on phonebook url.

How would it be possible to use a not listed brand of phone or Voip-ATA on the provisioning-module?