[Freeswitch-users] PDD Math

How do I calculate PDD in the freeswitch CDR's? Per http://wiki.freeswitch.org/wiki/PDD In Seconds: * progress_mediasec * progresssec In milliseconds (1000 = 1 second): * progress_mediamsec if there was media * progressmsec if there was no media In MicroSeconds (1000 = 1 millisecond) * progress_mediausec * progressusec but most of my calls that are not answered are 0 on both A and B legs.