3CX CRM API Filter by number if digits

[TecMate]

I'm about to start a project using the new(er) 3CX CRM API documented here
https://www.3cx.com/docs/crm-integration/

However I cannot find any way to filter calls by the number of digits.
i.e. don't run CRM if the call is an internal call or less than 4 digits.

This was an easy option using the old CRM integration plugins:


Am I missing something? Because my client would go crazy if all their internal calls pop up a CRM window.

 

[Evolute IT]

Internal calls do not query the CRM.