All Extension in use


Dear all
I set up ucm6301 and everything work great BUT I notes that some times all Extension at the seam time in use
any command on this issueScreenshot%202023-09-22%20122114

  • when the event occurs, what do you see in System Status -> Active Calls?
  • are you using UCM with latest FW?
  • have you opened any NATs not in ACL?


I see nothing on active calls.
yes withe latest FW

But yesterday at 4.45AM I get call to my bedroom from dining room, and nobody was in my home expect me


I think the solution is if you put the NATs in ACLs, you are currently exposing UCM to the whole world, therefore with serious security problems