The gray color of the active call means the connection of call time is less than half an hour. It means this call is
normal.
Figure 221: Call Connection less than half hour
The orange color of the active call means the connection of call time is greater than half an hour but less than
one hour. It means this call is a bit long.
Figure 222: Call Connection between half an hour and one hour
The red color of the active call means the connection of call time is more than one hour. It means this call could
be abnormal.