Virtual Calling Card (VCC) allows calls from private or public telephones, charging the subscriber's virtual account instead of the specific telephone line used. VCC calls are free of charge for the originating line, so callers can use them without having cash handy.
VCC lets operators offer features such as:
- sponsored calls in a split-charging scenario
- friends-and-family options (with easy speed-dialing facilities)
- attractive tariffs for calling while abroad (to avoid possible high roaming fees).
Users reach the service by dialing a subscriber-independent access number, then responding to prompts for a unique authentication number for call authorization. Subscribers then enter a Personal Identification Number (PIN) to verify their identity and prevent fraudulent use. After successful authentication, the service prompts the VCC user to either enter a desired destination number or access VCC-administration functions. As a convergent service, VCC allows calls from fixed, mobile, and IP-based networks.