Call::Call(const Call& src) : DocumentObject(src.getDocument(),"",0), _callType(src._callType), _destinationEntry(src._destinationEntry), _callMean(src._callMean), _histogram(src._histogram), _hasResultVarianceWaitingTime(false), _resultWaitingTime(0.0), _resultWaitingTimeVariance(0.0), _resultVarianceWaitingTime(0.0), _resultVarianceWaitingTimeVariance(0.0), _resultDropProbability(0.0), _resultDropProbabilityVariance(0.0) { }