[Freeswitch-users] get digits during entire session

Hi, I am trying to figure out a way to save the digits pressed during the entire duration of a call. I am particularly interested in doing this after a call has been bridged to an external provider. I currently use a perl script to bridge connections accordingly, based on various database look ups. Are there any functions that could be used for this? Posibbly through ESL? I would like to save the result string in an db. thanks in advance, spyros