3Com VCX V7122 SIP VoIP Gateway User Manual 237A PPENDIX J: RADIUS B ILLING ANDC ALLING CARD A PPLICATIONThe VCX V7122 calling card application capability (included in its IVR - Interactive VoiceResponse - feature) enables Internet Telephony Service Providers (ITSPs) to provide a VoIPtelephone service to subscribers who have purchased calling cards in advance.The subscriber market for calling cards is growing exponentially worldwide. Calling cards areoften much cheaper than collect calls and operator-assisted calls made through longdistance providers and local phone companies. VoIP service providers, using the VCXV7122, can further reduce costs for calling card subscribers and substantially reduceimplementation time, making the service extraordinarily attractive both for them and theirsubscribers.BenefitsUsing the VCX V7122, telephony service providers can offer the calling card service over aVoIP network and thereby: Lower the cost and deployment time that a PSTN calling-card service requires Achieve voice quality comparable to toll quality Acquire a cost-effective, reliable VoIP network infrastructure IVR functionality can be located at the edge of the network (distributed functionality) or ina central location Connect with the PSTN over carrier interfaces Interoperate with other VoIP service providers and other vendors' VoIP equipment Become part of a world-wide network of other VoIP service providers interested ininterconnectingFeatures PSTNÆIP and IPÆPSTN distributed IVR architecture AAA (Authentication, Authorization, Accounting) over standard RADIUS (RemoteAuthentication Dial In User Service/Service) - stored on a RADIUS server Provides comprehensive management of accounting and billing support CDRs (Call Detail Reports) over RADIUS (stored on a RADIUS server) Post-paid applications (Billing model: credit) Pre-paid application (Billing model: debit). When credit is exhausted the call isdisconnected (a short Prompt is played prior to disconnection) Common internal, on-board, Voice Prompts (in flash memory) for all VoiceXML (VoiceExtensible Markup Language) scripts Multiple VXML scripts stored on external HTTP server (up to 10 different scripts)
