[Freeswitch-users] how to find ring time

Hi, following these instructions my ring time comes out to be 49280130. I'm not sure what kind of number this is. How do I convert this to milliseconds? http://wiki.freeswitch.org/wiki/Cdr How long did the phone ring How long the phone rang is determined either by the hangup_time or the answered_time: if ( answered_time == 0 ) then length_of_phone_ringing = hangup_time - created_time else length_of_phone_ringing = answered_time - created_time end