A wireless telephone (302) digitizes the voice of the user in response to the depression of a push-to-talk button (110), either physical or virtual. It sends the digitized voice, in data mode, to a base station (308). The base station places the data, through the Internet, or an Intranet or Extranet,...http://www.google.fr/patents/US6917799?utm_source=gb-gplus-shareBrevet US6917799 - Wireless push-to-talk internet broadcast
