A telephone conferencing and inquiry handling apparatus and method provide a plurality of incoming calls with access to one or more ongoing or new communications groupings or pools. Apparatus for monitoring the level of voice energy on the incoming lines allows identification of a caller and allows registration...http://www.google.fr/patents/US4317960?utm_source=gb-gplus-shareBrevet US4317960 - Telephone-conferencing and inquiry-handling apparatus and method
Telephone-conferencing and inquiry-handling apparatus and method
