Question: What is the primary purpose of the "QCI1ERAB.NormCallDurationBinX" measurement in E-UTRAN performance management?
Option 1: To measure the duration of calls that are released due to abnormal causes.
Option 2: To provide a histogram result of normally released call (QCI1 E-RAB) durations collected during a measurement period.
Option 3: To monitor the number of incoming handovers in an E-UTRAN cell.
Option 4: To track the packet switched traffic volume in an EPS network.
Explanation: The correct answer is Option 2 because the "QCI1ERAB.NormCallDurationBinX" measurement is specifically designed to provide a histogram result of normally released call (QCI1 E-RAB) durations collected during a measurement period, as stated in paragraph a). This measurement helps network operators understand the distribution of normal call durations and optimize their network performance accordingly.