The invention constitutes a telephony based electronic voice greeting card service embodied within an adjunct processing system communicatively connected to a toll switching office of a public switched telephone network. The voice card system comprises a service controller, a storage node,...http://www.google.fr/patents/US5787151?utm_source=gb-gplus-shareBrevet US5787151 - Telephony based delivery system of messages containing selected greetings
Telephony based delivery system of messages containing selected greetings
