Hi,
From the CMR files i am parsing all the values,But i am surprised to see for few of the records varVQMetrics is blank,
Does this mean that the call has not completed or does this means the call is of poor quality
 
Presently i am assuming that if the duration of the call is > 0 and varVQMetrics <> "" i assume that the call is valid one
If varVQMetrics values < 3.2  --- poor calls
If varVQMetrics values < 3.8 & > 3.2 Ok Calls
If varVQMetrics values < 4.5 & > 3.8 good Calls
If varVQMetrics values < 5 & > 4.5 excellent Calls
 
If any varVQMetrics has the value as zero should i assume it as invalid calls ?
 
Please help me on this ...

So i can consider the calles with VarVQmetrics as blank as invalid or unsuccessfull calls right ?