Agi is a Tcl package to program telephony applications using Asterisk. AGI is short for Asterisk Gateway Interface, roughly analogous to CGI programming for Web servers. It allows custom IVR (Interactive Voice Response) and ACD (Automated Call Distribution) programs to be designed and written.
Agi was by Tom Poindexter. Agi can be currently found at the CVS respository [L1 ] for the Tel project http://tel.sourceforge.net
The Festtcl package is recommended, providing text to speech output.