A LAN telephone which makes voice telephone calls over a local area network (LAN) data network. Acoustic voice sounds are digitally encoded and transmitted as data, over the LAN. The disclosed telephone simultaneously receives LAN data packets and decodes them, translating the data into acoustic audio...http://www.google.fr/patents/US6556564?utm_source=gb-gplus-shareBrevet US6556564 - Scheduled internet protocol telephone instrument system
Scheduled internet protocol telephone instrument system
