Automatic telephone answering machine with ring signal responsive mode changing arrangement

摘要

An automatic telephone answering machine of the kind employing a microcomputer for switching from one mode of operation to another is arranged to switch from the "stop" mode to the "automatic answer" mode in response to recurring ring signals transmitted during an incoming phone call, provided those signals meet criteria such as duration of ring, length of interval between successive rings, and a minimum period of recurring ring signals. The mode switching arrangement causes the machine to switch to the "automatic answer" mode and then answer the call during the same phone call to enable the caller to confirm by receipt of the machine's outgoing announcement that the mode switch has occurred.