[Freeswitch-users] capture DTMF

Hi, I'm looking for a way to capture DTMF in the dialplan. My goal is to have a way for a user to enter an account number, pin code, etc. I've seen some examples in javascript and/or perl, but would really like to avoid using an "outside language". Does FS have any kind of function to capture the DTMF. (The format for the javascript function looks great if there was something similar in FS. It allows you to set the number of digits, timeout, etc..) Thanks, -N