This table provide historical measurement in various interval length defined by the csbHistoryStatsInterval object. Each interval may contain one or more entries to allow for detailed measurment to be collected. It is up to the platform to determine the number of intervals to be supported like 5 minutes, 15 minutes, 1 hour and 1 day. In addition, the number of historical entries is also determined by the platform resources. The gauge values are reported as: If the period being queried is previous5mins, this is the number of calls that were active at the end of the previous 5 minute period. Otherwise for the other intevals, this is an average value during the summary period, sampled at 5 minute intervals.