Implementation; Basic Calling Card Ivr Scenario - 3Com VCX V7122 User Manual

VoiceBrowser - (not shown in this diagram), responsible for the TTS (Text to Speech)
and ASR (Automatic Speech Recognition) services (not supported in this version).
Proxy Server – Standard management tool for SIP networks. Performs essential control,
administrative and managerial functions.
MediaPack – Analog media gateway, provides excellent voice quality and optimized
packet voice, fax and modem streaming over the IP network.

Implementation

The VCX V7122 uses an embedded VoiceXML interpreter to interpret and execute standard
VoiceXML scripts, which are loaded from an outbound HTTP server and stored in the
gateway's volatile memory (RAM). The predefined VoiceXML scripts (up to 10 different
scripts are supported) determine the development of the call according to the caller's
responses (DTMF digits) and AAA (Authentication, Authorization and Accounting)
information exchanged with a RADIUS server. Interaction with the caller is conducted using a
set of audio messages (stored in a single Voice Prompts file in the gateway's flash/RAM
memory) on the gateway's side, and by pressing DTMF digits on the subscriber's side.

Basic Calling Card IVR Scenario

Figure 86
Basic Call Scenario
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