Agi is a Tcl package to program telephony applications using [Asterisk].  

Agi was by [Tom Poindexter]. Agi can be currently found at the CVS respository
[http://cvs.sourceforge.net/viewcvs.py/tel/] for the Tel project http://tel.sourceforge.net

The [Festtcl] package is recommended, providing text to speech output.