The SIP Agent Reachability feature determines the availability of a SIP station. The SIP station acts as an agent for both Communication Manager and AES applications.

Session Manager maintains the registration state of a SIP station. However, the station might not be reachable from Communication Manager because of a network outage between the station and Session Manager or Avaya SBC, or a disruption between Communication Manager and Session Manager.

After you enable the SIP Agent Reachability feature, Communication Manager can detect the reachability status of a SIP station and take actions as configured.