public class PhoneDurationsImpl
extends java.lang.Object
implements PhoneDurations

Maintains set of PhoneDuration instances read in from a file. The format of the file is as follows:

 phone mean stddev
 phone mean stddev
 phone mean stddev
 ...
 

Where phone is the phone name, mean is a float representing the mean duration of the phone (typically in seconds), and stddev is a float representing the standard deviation from the mean.