A method and system allows multiple and simultaneous use of a pre-paid calling card. A call management system allows for the completion of multiple calls under one pre-paid calling card account number. Depending on the number of concurrent users, a billing system assigns a portion of the total number...http://www.google.fr/patents/US8019686?utm_source=gb-gplus-shareBrevet US8019686 - Method and system for allowing simultaneous usage of prepaid services
Method and system for allowing simultaneous usage of prepaid services
