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Mediant 2000 SIP User’s Manual K. RADIUS Billing and VXML Calling Card Application
Version 4.4 247 July 2005
K.4 Implementation
The Mediant 2000 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.
K.4.1 Basic Calling Card IVR Scenario
Figure K-2: Basic Call Scenario
Note: Some messages have been omitted from the above drawing for the sake of
clarity.