VXI* is the first official, native integration between the successful Asterisk open source telephony engine and VoiceXML, the most avanced voice and video application’s standard language. VXI* is an add-on channel driver for Asterisk-based systems. Adding VXI* to any Asterisk server enables access to the large VoiceXML applications world. You will get great advantages in opening your favorite PBX to the new evolution of IVVR (Interactive Voice & Video Response) and web enabled applications.

Technical Data Sheet

  VXI* Technical Data Sheet V14 (131.6 KiB, 2,278 hits)

Voice Services (IVR)

• Up to 150 audio VoiceXML sessions per CPU
• IP/SS7/ISDN network
• Speech integration with Asterisk PBX

Video Services (IVVR)

• Up to 60 video VoiceXML sessions per CPU
• 3G-324m network/SIP Video
• Video play and record / .3gp format supported

Key features and benefits

• VoiceXML V2.0 compliant
• VoiceXML V2.1 tags extended allowed in 1.4 version (<transfer>,…)
• Call Control functions/variables for Asterisk
• Base on OpenVXI voice browser template
• Application for Asterisk PBX (app_vxml.so)
• VoiceXML accounts managment configuration (for hosting services)
• Support plugging objects with the VoiceXML tag, SDK with API available
• Video calling SIP/3G support (prompt and record)
• Fax support (send and receive)
• Video silence parameter with VoiceXML syntax
• Text-to-Speech (TTS) connector included
• Automatic-Speech-Recognition (ASR) connector included
• Text-to-Video (TTV) with HTTP connector (option)
• Voice-Silent Detection (VSD)
• Support RTSP uri with <audio> voice and video
• Control VCR function for WAV clips with property “control” (* and # keys) *New
• Predictive Outbound Calling (option)

Text-to-Speech engines supported

• Flite – freeware (TTS) from CMU Speech Group
• Loquendo (TTS)
• Cepstral (TTS)
• Verbio  (TTS)
• Nuance Scansoft (TTS)
• Acapela (TTS)
• Voiceinteraction (TTS)
• Universal HTTP connector for any TTS engines

Automatic-Speech-Recognition engines supported

• Lumenvox Speech Engine (ASR)
• Verbio Speech Server (ASR)
• Voiceinteraction Audimus (ASR)

Other engines integrated

• Text-to-Video Engine (TTV)
• Voice-Silent-Detection (VSD)

Asterisk requirements

• Asterisk 1.4 OSS
• Asterisk 1.6 OSS
• Asterisk Business Edition ABR
• AsteriskNOW

Linux OS requirements

VXI* is built with a Debian Linux with GCC3 / libstdc++5 or GCC4 / libstdc++6 environment. To install, configure and use the the plugin for Asterisk PBX for other distributions, please read the documentation.

Linux distributions certified:

• Debian
• CentOS
• AsteriskNOW
• Ubuntu
• Redhat
• Fedora
• CentOS
• Suse

Software Licensing

VXI* is licensed on a concurrent-call basis, much like Digium’s distributions of G-729 codec. The term “concurent calls” or ports refers to the number of VoiceXML sessions or channel instances that can exist on the Asterisk server at any one time. For example, if the system was licensed for five concurrent calls, it could process a total of five  inbound or outbound calls at any given time. A sixth incoming or outgoing call would fail to connect. VXI* is a binary module and will be offered by I6NET to the end user under the terms of a commercial license. Source code for VXI* is not available.