Chapter 15. Using Tcl Scripts and VoiceXML
Cisco voice gateways have the ability to support interactive voice response (IVR) and advanced call-handling applications using Toolkit Command Language (Tcl) or VoiceXML (sometimes referenced as VXML). Tcl and VoiceXML are scripting languages that allow the gateway to provide specialized call treatment, such as playing audio prompts and accepting user input using dual-tone multifrequency (DTMF) tones.
Dr. John Ousterhout developed the Tcl script language at the University of California, Berkeley. Cisco voice gateways run Tcl IVR 2.0, which is based on Tcl with a proprietary Cisco application programming interface (API). On the Cisco website, you will sometimes see Tcl referred to as “TCL,” but the official ...
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