This is read when the caller inputs a DTMF combination that is not reflected in the menu "entries". Here you want to read the caller something like, "the number you have entered is not a valid option."
- Preface
- Architecture of FreeSWITCH
- Building and Installation
- Test Driving the Example Configuration
- Important concepts to understand
- FS_CLI and Console, Controlling FreeSWITCH
- Configure SIP and make the first calls in demo dialplan
- Summary
- User Directory, SIP, and Verto
- WebRTC, SIP, and Verto
- XML Dialplan
- Phrase Macros and XML IVRs
- Lua FreeSWITCH Scripting
- Dialplan in Deep
- Where are the previous Dialplan seasons?
- XML Dialplan Recap
- More about conditions
- Pitfalls to avoid
- Variables
- API commands from Dialplan
- FreeSWITCH string interpreter functions
- "Hotkeys", Listening, Barging
- Dialplan Cookbook
- Summary
- Dialplan, Directory, and ALL via XML_CURL and Scripts
- ESL - FreeSWITCH Controlled by Events
- HTTAPI - FreeSWITCH Asks Webserver Next Action
- Conferencing and WebRTC Video-Conferencing
- Handling NAT
- VoIP Security
- Troubleshooting, Asking for Help, and Reporting Bugs
invalid-sound
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