There is no intelligence feature to sending out notification from VCS regular base regarding to resource usage.
You may pull out resource usage by using API “xsta resouceusage”.
This should give output like below.
============================
*s ResourceUsage:
Calls:
Traversal:
Current: 2
Max: 6
Total: 80
NonTraversal:
Current: 1
Max: 12
Total: 165
Registrations:
Current: 20
Max: 45
Total: 1250
TURN:
Relays:
Current: 0
Max: 36
Total: 54
============================
You may script this to pulling out information in certain cycle and generate the graph to review call license resource usage.