A processor-controlled automatic calling system is provided in accordance with the teachings of the present invention. The automatic calling system is connected to a plurality of telephone lines within a subscriber's telephone system and all telephone sets within the subscriber's telephone system are...http://www.google.fr/patents/US4513175?utm_source=gb-gplus-shareBrevet US4513175 - Automatic calling systems for accessing communications networks
Automatic calling systems for accessing communications networks
