The present invention is directed to a system and method for accessing home monitoring devices remotely via a distributed wide-area network (WAN). More specifically, the present invention is directed towards smoke detector system, which monitors for the presence of smoke and communicates the smoke condition...http://www.google.com.hk/patents/US6914533?utm_source=gb-gplus-share專利 US6914533 - System and method for accessing residential monitoring devices
