Observer Analyzer : Observer Analyzer : Expert Analysis : VoIP Expert Explanations : VoIP Active Calls in Setup or Teardown
VoIP Active Calls in Setup or Teardown
The number of VoIP Active Calls in Setup or Teardown has exceeded threshold. Call setup and teardown are call signalling functions, managed by the SIP proxy server or H.323 gateway. Possible reasons for this event:
There is simply a high volume of call activity currently.
The VoIP call manager (e.g., the SIP proxy server) is under a Denial of Service (DoS) attack. You should be able to configure your firewall to block the traffic after using Observer to examine the suspicious call setup/teardown requests.