DPMA Phonebook Hints -- Variables?

I’ve got DPMA working just fine and am setting up the phonebooks. I know how to subscribe to hints in general and have this working as well.

What I’m trying to figure out is if I can use variables in hints.

For example, I want to make a single phonebook for a particular department. I want one of the entries to subscribe to hints that indicate whether Follow Me is enabled or not.

The Follow Me hint for extension “123” would be: *21123

But, now I want this phonebook to be used by each phone in that department and I want each phone to only monitor it’s own Follow Me hint.

So essentially, what I am looking for in end result is something like: *21${EXTEN} (which doesn’t work, of course).

I hope I gave enough background for this question to make sense. I’m assuming that what I am looking for is not possible with DPMA.

Is my assumption correct?

Thank you.