Hi, I am trying to calculate the number of Active Calls at any 'given time' from Call Detail Records (CDR). CDRs store the 'callConnect' and 'callDisconnect' time in a single CDR event. Logically speaking at any 'given time' the number of active calls = number of CDR events that have 'callDisconnect' > 'given time' (while evaluating all the CDR call records older than 'given time'). How can we implement this as Splunk search Querry? Any ideas.