The Emergency Services Configuration page contains a setting for specifying the duration of Call Status entries.
In the left navigation pane, go to Emergency Services > Configuration.
Specifies the duration of time, in hours, that a call remains in the Call Status Table.
Enabling this feature preempts an existing non-emergency call if a 911 call is attempted when all outbound channel resources of a signaling group are full.
The non-emergency call that will be preempted is located on the signaling group where the emergency call is accepted and routed. The selection is random.
Call preemption applies only to calls on routed signalling groups (whether inbound or outbound) based on configuration.