[Freeswitch-users] Asterisk dial status

Hi, I am trying to port over an Asterisk AGI script that does a call bridge to Freeswitch using perl, I wanted to know what is the equivalent of the asterisk dial status like: ANSWER, NO_ANSWER, CANCEL, BUSY, CONGESTION, CHANUNAVAIL ? I wanted to know if what methods can be used to gets these statues?